MAX8930 [MAXIM]
WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI; WLED电荷泵， RGB ， OLED升压， LDO，具有ALC和CAI
| 型号： | MAX8930 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI |
| 文件： | 总52页 (文件大小：4660K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4921; Rev 0; 3/10
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
General Description
Features
Sꢀ White_LED_Charge_Pump
The MAX8930 integrates a charge pump for white LED
display backlighting with ambient light control (ALC)
feature. The high-efficiency, adaptive-mode 1x/-0.5x
charge pump drives up to 11 LEDs (8 WLEDs + RGB
LED) with constant current for uniform brightness. The
LED current is adjustable from 0.1mA to 25.6mA in 256
Sꢀ Adaptive_1x_or_-0.5x_Negative_Modes
Sꢀ 11_Low-Dropout_LED_Current_Sinks_with_25.6mA_
to_0.1mA_in_256_Dimming_Steps
Sꢀ Ramp-Up/Down_Control_for_Main_White_LED
Sꢀ Ramp-Up/Down_Control_for_RGB_LED
2
linear steps through I C. High accuracy and LED-to-LED
Sꢀ Individual_Brightness_Control_for_Each_White,_
current matching are maintained throughout the adjust-
ment range. The MAX8930 includes soft-start, thermal
shutdown, open-circuit, and short-circuit protection.
RGB_LED
Sꢀ Low_240µA_(typ)_Quiescent_Current
Three 200mA LDOs are provided with programmable
output voltages to provide power to external circuitry.
These three LDOs can also be configured for a GPO
function through the I C. A step-up converter is also
available on the MAX8930 for biasing a PMOLED sub-
panel.
Sꢀ Ambient_Light_Control_(ALC)_for_Any_Type_of_Light_
Sensor
Sꢀ Content_Adaptive_Interface
2
2
Sꢀ I C-Compatible_Control_Interface
Sꢀ Three_Programmable_LDOs_Up_to_200mA
Sꢀ Step-Up_DC-DC_Converter_with_Programmable_
The MAX8930 is available in the 49-bump, 3.17mm x
3.17mm WLP package.
Output_for_PMOLED_Application
Sꢀ Low_0.1µA_Shutdown_Current
Sꢀ 2.7V_to_5.5V_Supply_Voltage_Range
Sꢀ Thermal_Shutdown
Simplified Application Circuit
INPUT
Sꢀ Open_and_Short-Circuit_Protection
WLED1
WLED2
INPUT 2.7V TO 5.5V
PV1
PV2
PV3
PV5
PV4
BIAS
Applications
Cell Phones and Smartphones
WLED3
WLED4
WLED5
WLED6
WLED7
WLED8
PDAs, Digital Cameras, Camcorders, and Other
Portable Equipment
INPUT 1.7V TO 5.5V
INPUT
Ordering Information
LIGHT
SENSOR
SENSE
PART
TEMP_RANGE
PIN-PACKAGE
RLED
GLED
BLED
MAX8930
49 WLP
0.4mm pitch
MAX8930EWJ+
-40NC to +85NC
KEY
+Denotes a lead(Pb)-free/RoHS-compliant package.
CHG
LDO1
LDO2
2.3V TO 3.1V, 200mA
2.3V TO 3.1V, 200mA
1.2V, 1.5V, 1.8V, 2.5V, 200mA
13V TO 16.5V
SCL
SDA
LDO3
OUT
EN
Typical Operating Circuit appears at end of data sheet.
µP
CAI
PLAYR
PLAYG
PLAYB
REFBP
V
DD
FILT
_ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ _Maxim Integrated Products_ _ 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
ABSOLUTE_MAXIMUM_RATINGS
PV_, V
EN, CAI, PLAY_, BIAS,
LX, OUT to PGND3 ...............................................-0.3V to +22V
KEY to AGND ...........................................-0.3V to (V + 0.3V)
DD,
SENSE, REFBP, ECAGND to AGND.................-0.3V to +6.0V
PV3
PV_, V , PGND_, AGND to NEG.......................-0.3V to +6.0V
Continuous Power Dissipation (T = +70NC)
DD
A
ECAGND, PGND_ to AGND.................................-0.3V to +0.3V
WLED_, RGB_, C1N, C2N,
49-Pin WLP 3.17mm x 3.17mm
(derate 20mW/NC above +70NC)................................1600mW
Operating Temperature Range.......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
C1P, C2P to NEG.........-0.3V to (V
+ V
+ V
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
PV1
PV2
PV3
FILT to AGND.......................................... -0.3V to (V
PV3
SCL, SDA to AGND.................................. -0.3V to (V
DD
LDO_ to AGND............................ -0.3V to (V
SW to PGND3.......................................... -0.3V to (V
V
PV5
PV3 + PV4
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL_CHARACTERISTICS
(V
PV_
= V
= V
= 3.7V, V
and V
= 0V, T = -40°C to +85°C, unless otherwise noted. Typical values are at
AGND A
EN
DD
PGND_
T
= +25°C.) (Note 1)
A
PARAMETER
CONDITIONS
MIN
2.7
TYP
MAX
5.5
UNITS
PV1, PV2, PV3, PV5 Operating
Voltage
V
Undervoltage Lockout Threshold
UVLO Hysteresis
V
V
V
V
V
rising
2
2.25
2.45
100
2.65
V
mV
V
PV1, PV2, PV3, PV5
PV4 Operating Voltage
1.7
1.7
5.5
5.5
1
is supply voltage for I C input block only; all other
DD
V
Operating Range
V
DD
logic is supplied from PV_
T
A
T
A
T
A
T
A
= +25NC
= +85NC
= +25NC
= +85NC
0.1
0.1
2
PV_ Shutdown Supply Current 1
EN = AGND, V = 0V
FA
FA
DD
2
(All Outputs Off, I C Disabled)
10
PV_ Shutdown Supply Current 2
V
V
= V
, EN = AGND
DD
PV3
2
(All Outputs Off, I C Enabled)
2
V
DD
Shutdown Threshold
falling, hysteresis = 50mV
1.15
1.4
240
1.65
400
V
DD
1x mode, no load, ALC off, step-up off, I
= 0mA
FA
LDO_
-0.5x mode, 4MHz switching, each I
= 0.1mA,
LED_
Supply Current
ALC off, I
(Note 2)
= 0mA, step-up I = 0mA at V
= 2.7V
PV3
6.8
mA
LDO
o
Reference Bypass (REFBP)
Output Voltage
0FA P I
P 1FA
1.164
1.200
1.236
5
V
REFBP
REFBP Supply Rejection
Thermal Shutdown
2.5V P V
P 5.5V
0.2
+160
20
mV
NC
NC
PV3
Thermal Shutdown Hysteresis
2_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
2
I C_INTERFACE_CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
0.7 x
SDA, SCL Input High Voltage
SDA, SCL Input Low Voltage
SDA, SCL Input Current
V
V
= 1.7V to 5.5V
= 1.7V to 5.5V
V
DD
V
DD
0.3 x
V
DD
V
DD
T
T
= +25NC
= +85NC
0.01
0.1
1
V
V
= 0V or V = 5.5V,
A
IL
IH
FA
= 5.5V
DD
A
SDA Output Low Voltage
Clock Frequency
I
= 3mA, for acknowledge (Note 3)
0.03
0.4
V
SDA
(Note 3)
100
1.3
400
kHz
Bus-Free Time Between START
and STOP
t
t
(Note 3)
Fs
Fs
BUF
Hold Time Repeated START
Condition
(Note 3)
0.6
0.1
HD,STA
SCL Low Period
SCL High Period
t
t
(Note 3)
1.3
0.6
0.2
0.2
Fs
Fs
LOW
(Note 3)
HIGH
Setup Time Repeated START
Condition
t
(Note 3)
0.6
0.1
Fs
SU,STA
SDA Hold Time
t
t
t
(Note 3)
(Note 3)
(Note 3)
0
0.01
50
Fs
ns
Fs
HD,DAT
SU,DAT
SU,STO
SDA Setup Time
100
0.6
Setup Time for STOP Condition
0.1
CHARGE_PUMP_CHARACTERISTICS
PARAMETER
Switching Frequency
Pump Soft-Start Time
Charge-Pump Regulation
CONDITIONS
MIN
4.3
TYP
4
MAX
UNITS
MHz
ms
0.5
V , V
PV1 PV2
- V
5
V
NEG
Voltage (and OVP)
Open-Loop NEG Output
Resistance
(0.5 x (V
V
) - V
)/I
1.3
2.49
I
PV1 or PV2
NEG NEG
Guaranteed Output Current
LED V
= 3.9V, V
= V = 3.2V
PV2
281
mA
kI
FMAX
PV1
NEG Discharge Resistance in
Shutdown
All LEDs off
10
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 3
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
CURRENT_SINK_DRIVER_CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
2
Current Setting Range
WLED1–WLED8, RGB programmable by I C
0.1
25.6
mA
0
(default)
0.016
0.064
0.128
0.256
0.512
1.024
2.048
Main WLED_ and RGB ramp-up/ramp-down in 0.1mA
increments; 8 steps are programmable through I C;
ramp-up and ramp-down times are set separately
ms/
0.1mA
WLED_, RGB Ramp-Up/Ramp-
Down Time
2
25.6mA setting, T = +25NC
-2.5
-50
+2.5
+50
10
A
WLED_, RGB Current Accuracy
WLED_, RGB Current Matching
%
%
I
0.1mA setting, T = +25NC
Q10
5
A
WLED1–WLED8, RGB (Note 4)
1x mode
2.68
4.12
62
WLED_, RGB R
DSON
-0.5x mode
T
T
= 0NC to +85NC
= -40NC
120
150
200
A
1x mode
WLED_, RGB Current Regulator 25.6mA setting
62
mV
mV
A
Dropout Voltage
(Note 5)
-0.5x mode
95
WLED_, RGB Current Regulator
Switchover Threshold
(1x to -0.5x)
V
LED
falling
125
150
175
WLED_, RGB Current Regulator
Switchover Hysteresis
100
mV
T
T
= +25NC
= +85NC
0.01
0.1
5
WLED_, RGB Leakage in
Shutdown
A
All LEDs off
FA
A
LDO1_CHARACTERISTICS
PARAMETER
CONDITIONS
= 3.6V
PV3
MIN
TYP
MAX
UNITS
Output Voltage V
(Default)
200mA at V
2.522
2.231
2.425
2.522
2.619
2.716
2.813
2.910
3.007
200
2.6
2.3
2.5
2.6
2.7
2.8
2.9
3.0
3.1
2.678
2.369
2.575
2.678
2.781
2.884
2.987
3.090
3.193
V
LDO1
Programmable Output Voltage
I
= 50mA
V
LDO1
Output Current
Current Limit
mA
mA
mV
mV
mV
V
= 90% of nominal regulation voltage (Note 3)
LDO1
= 200mA, T = +25NC
LDO1 A
250
475
120
2.4
25
750
300
Dropout Voltage
Line Regulation
Load Regulation
I
3.4V P V
P 5.5V, I
= 150mA
PV3_
LDO1
1mA < I
< 200mA
LDO1
4_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
LDO1_CHARACTERISTICS_(continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power-Supply Rejection
f = 10Hz to 10kHz, I
= 10mA, C = 1FF
LDO1
60
dB
LDO1
DV
/DV
LDO1 PV3
Output Noise Voltage (RMS)
Minimum Output Capacitor
Startup Time from Shutdown
Startup Transient Overshoot
Shutdown Output Impedance
f = 100Hz to 100kHz, I
= 10mA, C
= 1FF
45
1
FV
RMS
LDO1
LDO1
I
I
I
< 200mA
FF
Fs
LDO1
LDO1
LDO1
= 150mA (Note 3)
= 150mA (Note 3)
40
3
100
50
mV
kI
2
LDO1 disabled through I C (default on)
1
LDO2_CHARACTERISTICS
PARAMETER
CONDITIONS
= 3.6V
PV3
MIN
TYP
MAX
UNITS
Output Voltage V
(Default)
200mA at V
2.813
2.231
2.425
2.522
2.619
2.716
2.813
2.910
3.007
200
2.9
2.3
2.5
2.6
2.7
2.8
2.9
3.0
3.1
2.987
2.369
2.575
2.678
2.781
2.884
2.987
3.090
3.193
V
LDO2
Programmable Output Voltage
I
= 50mA
V
LDO2
Output Current
mA
mA
mV
mV
mV
Current Limit
V
= 90% of nominal regulation voltage (Note 4)
LDO2
= 200mA, T = +25NC
LDO2 A
250
475
120
2.4
25
750
300
Dropout Voltage
Line Regulation
Load Regulation
Power-Supply Rejection
I
3.4V P V
P 5.5V, I
= 150mA
PV3_
LDO2
1mA < I
< 200mA
LDO2
f = 10Hz to 10kHz, I
= 10mA, C
= 1FF
60
dB
LDO2
LDO2
DV
/DV
PV3
LDO2
Output Noise Voltage (RMS)
Minimum Output Capacitor
Startup Time from Shutdown
Startup Transient Overshoot
Shutdown Output Impedance
f = 100Hz to 100kHz, I
= 10mA, C
= 1FF
45
1
FV
RMS
LDO2
LDO2
I
I
I
< 200mA
FF
Fs
LDO2
LDO2
LDO2
= 150mA (Note 3)
= 150mA (Note 3)
40
3
100
50
mV
kI
2
LDO2 disabled through I C (default on)
1
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 5
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
LDO3_CHARACTERISTICS
PARAMETER
CONDITIONS
= 2.4V
PV4
MIN
1.7
TYP
MAX
5.5
UNITS
Input Operating Range
V
V
V
PV4
Output Voltage V
200mA at V
1.764
1.164
1.455
1.764
2.425
1.80
1.2
1.854
1.236
1.545
1.854
2.575
200
LDO3
V
V
= 1.8V, I
= 50mA
= 50mA
PV4
PV4
LDO3
1.5
Programmable Output Voltage
V
1.80
2.5
= 3.7V, I
LDO3
Output Current
mA
mA
mV
mV
mV
Current Limit
V
= 90% of nominal regulation voltage (Note 4)
250
475
120
2.4
25
750
LDO3
Dropout Voltage
Line Regulation
Load Regulation
Power-Supply Rejection
I
= 200mA, T = +25NC
300
LDO3
A
2.4V P V
P 5.5V, I
= 150mA
PV4
LDO3
1mA < I
< 200mA
LDO3
f = 10Hz to 10kHz, I
= 10mA, C
= 2.2FF
60
75
dB
LDO3
LDO3
DV
/DV
PV4
LDO3
Output Noise Voltage (RMS)
Minimum Output Capacitor
Startup Time from Shutdown
Startup Transient Overshoot
Shutdown Output Impedance
f = 100Hz to 100kHz, I
= 10mA, C
= 2.2FF
FV
RMS
LDO3
LDO3
0FA < I
< 200mA (Note 3)
2.2
FF
Fs
LDO3
I
I
= 150mA (Note 3)
= 150mA (Note 3)
100
3
250
50
LDO3
LDO3
mV
kI
2
LDO3 disabled through I C (default on)
1
STEP-UP_CONVERTER_CHARACTERISTICS
PARAMETER
Input Operating Range
Line Regulation
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
V
V
2.7
5.5
PV5
= 14V, I
= 14V, I
= 5mA, V = 2.7V to 5.5V
0.1
0.1
%/V
%/mA
V
OUT
OUT
OUT
PV5
Load Regulation
= 0mA to 5mA, V
= 3.7V
OUT
PV5
LX Voltage Range
20
289
2
LX Switch Current Limit
192
241
0.01
0.1
1.5
4.0
0.3
0.01
0.1
0.2
0.9
11
mA
T
T
= +25NC
= +85NC
V
= 20V, step-up
A
A
LX
LX Leakage Current
FA
converter disabled
I
I
A
Isolation pMOS R
pMOS Rectifier R
V
= 2.7V, I
= 100mA
2.4
DS(ON)
PV5
SW
LX to OUT, V
= 3.7V, I = 100mA
LX
DS(ON)
PV5
Isolation pMOS Current Limit
Isolation pMOS Leakage Current
SW Soft-Start Time
V
= 3.7V, V
= 0V
0.15
0.6
1
PV5
SW
T
T
= +25NC
= +85NC
SW = PGND3,
A
A
FA
V
V
V
= 5.5V
PV5
PV5
PV5
= 2.7V
ms
I
nMOS R
= 3.7V, I = 100mA
LX
1.5
14
DS(ON)
Maximum LX On-Time
Minimum LX Off-Time
OVP Threshold
8
Fs
Fs
V
V
> 12V
1.6
2
2.4
19.4
OUT
No feedback, V
rising
17.6
18.5
1
OUT
OVP Threshold Hysteresis
V
6_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
STEP-UP_CONVERTER_CHARACTERISTICS_(continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Current Limit Propagation Delay
(LX)
55
ns
T
T
= 0NC to +85NC
= -40NC
-2
+2
A
A
Output Voltage Accuracy
V
V
= 3.7V, I
= 0mA
= 0mA
%
V
PV5
PV5
OUT
OUT
-2.5
+2.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
Programmable Output Voltage
= 3.7V, I
AMBIENT_LIGHT_SENSOR_INTERFACE
PARAMETER
BIAS Output Voltage
BIAS Output Current
BIAS Dropout Voltage
CONDITIONS
MIN
TYP
MAX
3.15
30
UNITS
V
I
= 200FA, V
= 3.2V to 5.5V
2.85
3.0
BAIS
PV3
V
= 3.0V Q5%
mA
mV
BIAS
BIAS
I
= 10mA (Note 3)
125
250
V
x
BIAS
SENSE Input Voltage Range
0
V
255/256
BIAS Discharge Resistance in
Shutdown
1.0
8
1.5
kI
ADC Resolution
Bit
ADC Integral Nonlinearity Error
-3
-1
1
+3
+1
LSB
ADC Differential Nonlinearity
Error
LSB
SENSE Input Impedance
T
= +25NC (Note 3)
MI
A
Bit 0 = 0 in 02h register
Bit = 1 in 02h register
32
ms
Waiting Time for ADC Movement
After ALCEN = 1
V
BIAS
= 3V
64
(default)
ms
KEY_CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
1.8
TYP
MAX
UNITS
Low-Level Output Voltage
High-Level Output Voltage
I
I
= 1mA
0.4
V
V
SINK
= 1mA
SOURCE
T
= +25NC
0.01
0.1
1
1
At complementary output,
= 3.7V (Note 6)
A
A
A
A
nMOS Output Leakage Current
pMOS Output Leakage Current
FA
FA
V
PV3
T
T
T
= +85NC
= +25NC
= +85NC
0.01
0.1
At complementary output,
= 3.7V (Note 6)
V
PV3
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 7
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
CAI_CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
PWM Low-Level Input Voltage
PWM High-Level Input Voltage
PWM Dimming Frequency
Current Dimming Range
0.4
1.4
0.1
0
V
C
FILT
= 0.1FF (Note 3)
0.2
15
kHz
mA
Duty cycle = 0% to 100% (Note 3)
25.6
PWM Dimming Resolution
1% P duty cycle P 100% (Note 3)
0.256
10
mA/%
Time from CAI enable until dimming control switches to
CAI input (Note 4)
CAI Enable Blanking Time (t )
B
ms
T
T
= +25NC
= +85NC
0.1
1
1
A
Input Leakage Current
CAI = GND or V
= 3.7V
FA
CAI
A
GPO_(OPEN-DRAIN_OUTPUT)_CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Low-Level Output Voltage
I
= 1mA
0.2
V
SINK
T
T
= +25NC
= +85NC
0.1
1
A
A
Output Leakage Current
V
= 2.6V
FA
LDO__
EN_CHARACTERISTICS
PARAMETER
Low-Level Input Voltage
High-Level Input Voltage
CONDITIONS
MIN
TYP
MAX
UNITS
0.4
V
V
1.4
T
T
= +25NC
= +85NC
0.1
1
1
A
A
Input Leakage Current
V
EN
= 0V or 3.7V
FA
PLAYR/PLAYG/PLAYB_CHARACTERISTICS
PARAMETER
Low-Level Input Voltage
High-Level Input Voltage
ON/OFF PWM Frequency
CONDITIONS
MIN
TYP
MAX
UNITS
0.4
V
V
1.4
2
(Note 3)
200
Hz
PLAY_ active high
(Bit 1 = low in Register 20h) (Note 3)
PLAY_ Minimum High Time
80
80
Fs
PLAY_ active low
(Bit 1= high in Register 20h) (Note 3)
PLAY_ Minimum Low Time
Pulldown Resistor to AGND
Fs
800
kI
8_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
CHG_PIN_CHARACTERISTICS
PARAMETER
Low-Level Voltage
CONDITIONS
MIN
TYP
0.05
0.1
1
MAX
0.2
1
UNITS
V
I
= 5mA
= 3.7V
CHG
T
T
= +25NC
= +85NC
A
A
Leakage Current
FA
V
CHG
Note_1:_ Limits are 100% production tested at T = +25NC. Limits over the operating temperature range are guaranteed by design.
A
Note_2:_ 0.1mA LED load current is not included.
Note_3:_ Guaranteed by design. Not production tested.
Note_4:_ LED current matching is defined as: (I
- I
)/25.6mA. Matching is for LEDs within the RGB group (RLED, GLED,
MAX MAX
BLED) or the white LED group (WLED1–WLED8).
Note_5:_ Dropout voltage is defined as the LED_ to AGND voltage at which current into LED_ drops 10% from the value at V
=
LED_
0.5V at 1x mode.
Note_6:_ V
= 0V when pulling low, leakage current from PV3. V
= 3.7V when pulling high, leakage current is to GND.
KEY
KEY
Typical Operating Characteristics
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN A
WLED EFFICIENCY vs. INPUT VOTLAGE,
6 MATCHED WLEDS
WLED EFFICIENCY vs. INPUT VOTLAGE,
6 MISMATCHED WLEDS
EFFICIENCY vs. Li+ BATTERY VOLTAGE
DRIVING 6 MATCHED LEDs
100
100
90
80
70
60
50
40
100
90
80
70
60
50
40
I
= 1.6mA, 6.4mA, 16mA, 20.8mA
I
= 1.6mA, 6.4mA, 16mA, 20.8mA
LED_
LED_
16mA/LED
90
80
70
60
50
40
20.8mA/LED
1.6mA/LED
6.4mA/LED
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
4.2 3.9
3.8
3.7
3.6
3.5 3.4 3.0
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY vs. Li+ BATTERY VOLTAGE
DRIVING 6 MISMATCHED LEDs
WLED CURRENT MATCHING
vs. INPUT VOTLAGE
WLED—CHARGE PUMP INACTIVE
MAX8930 toc06
0.0265
0.0264
0.0263
0.0262
0.0261
0.0260
0.0259
0.0258
0.0257
0.0256
0.0255
0.0254
100
90
80
70
60
50
40
V
= 3.8V, I
= 25.6mA
LED_
PV_
I
= 25.6mA
LED_
1.6mA/LED
6.4mA/LED
V
C1P
0V
0V
V
C1N
V
V
0V
0V
0V
C2P
20.8mA/LED
16mA/LED
C2N
NEG
V
2.5
3.0
3.5
4.0
4.5
5.0
5.5
4.2 3.9
3.8
3.7
3.6
3.5 3.4 3.0
100ns/div
INPUT VOLTAGE (V)
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 9
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
WLED—DIMMING CURRENT TRANSIENT
WITH SLOPE CONTROL
WLED—CHARGE PUMP ACTIVE
MAX8930 toc07
MAX8930 toc08
V
C1P
20mA
2V/div
0V
I
I
LED1
0V
2V/div
V
C1N
10mA/div
10mA/div
1mA
1mA
20mA
2V/div
0V
V
C2P
C2N
NEG
V
= 3.8V, I
= 25.6mA
LED
PV_
LED2
V
V
0V
2V/div
0V
2V/div
0.256ms/0.1mA SLOPE
10ms/div
100ns/div
WLED—DIMMING CURRENT TRANSIENT
WLED—DIMMING CURRENT TRANSIENT
2
BY I C
BY CAI
MAX8930 toc09
MAX8930 toc10
2V/div
0mA
V
CAI
20mA
10mA
I
V
LED1
LED2
2V/div
0mA
SDA
10mA/div
10mA/div
10mA/div
0mA
20mA
I
LED1
10mA
I
10mA/div
0mA
I
LED2
2
I C SETTING = 25.6mA TO 20mA
1ms/div
4ms/div
WLED—DIMMING CURRENT TRANSIENT
WLED—DIMMING CURRENT TRANSIENT
2
BY CAI AND I C
BY ALC
MAX8930 toc11
MAX8930 toc12
2V/div
0mA
V
V
CAI
SENSE
1V/div
0V
I
LED1
20mA/div
0mA
10mA/div
0mA
I
I
LED1
LED2
I
LED2
20mA/div
0mA
10mA/div
0mA
2
I C SETTING = 20mA
2ms/div
100ms/div
10_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
WLED—DIMMING CURRENT TRANSIENT
WLED—DIMMING CURRENT TRANSIENT
BY ALC WITH SLOPE CONTROL
BY ALC AND CAI
MAX8930 toc13
MAX8930 toc14
V
2V/div
0V
CAI
V
SENSE
1V/div
0V
2V/div
0mA
V
SENSE
I
20mA/div
0mA
LED1
LED2
I
LED1
LED2
10mA/div
0mA
I
20mA/div
0mA
10mA/div
0mA
I
0.256ms/0.1mA SLOPE
100ms/div
100ms/div
WLED—LED1 OPEN CIRCUIT,
WLED—LED1 OPEN CIRCUIT,
V
= 3.2V
PV
V
= 3.8V
PV
MAX8930 toc16
MAX8930 toc15
0V
0V
V
LED1
V
I
LED1
1V/div
1V/div
V
0V
2V/div
NEG
V
0V
2V/div
NEG
LED1
I
LED1
20mA/div
20mA/div
0mA
0mA
I
LED2
I
20mA/div
LED2
20mA/div
0mA
0mA
400µs/div
400µs/div
RGB—PLAY_ ON/OFF TRANSITION,
RGB—CURRENT TRANSIENT BY
2
LOGIC-HIGH
I C WITH SLOPE CONTROL
MAX8930 toc18
MAX8930 toc17
5V/div
0V
10mA/div
0V
V
PLAY_
I
RLED
I
10mA/div
0mA
RLED
0.256ms/0.1mA SLOPE
2
I C SETTING = 10mA
I
GLED
I
10mA/div
0mA
GLED
10mA/div
0mA
10mA/div
0mA
10mA/div
0mA
I
BLED
I
BLED
10ms/div
10ms/div
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 11
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
RGB—PLAY_ ON/OFF TRANSITION,
LOGIC-LOW
RGB—PLAY_ ON/OFF TRANSITION
2
AND I C COMING
MAX8930 toc19
MAX8930 toc20
5V/div
0V
V
PLAY_
10mA/div
10mA/div
10mA/div
I
I
10mA
10mA
RLED
I
10mA/div
0mA
RLED
2
I C SETTING = 10mA
GLED
I
GLED
10mA/div
0mA
I
BLED
10mA
10mA/div
0mA
I
BLED
10ms/div
10ms/div
LDO SHUTDOWN—DEFAULT ACTIVE
DISCHARGE ON
LDO STARTUP—NO LOAD
MAX8930 toc21
MAX8930 toc22
V
LDO1
V
V
LDO1
LDO2
2V/div
0V
2V/div
0V
2V/div
0V
2V/div
0V
V
V
LDO2
LDO3
1V/div
0V
1V/div
0V
V
LDO3
10ms/div
2ms/div
LDO—LINE TRANSIENT
LDO1 LOAD TRANSIENT
MAX8930 toc23
MAX8930 toc24
200mA/div
0mA
V
PV
I
LDO1
150mA
0mA
1V/div
3.2V
4.2V
AC-COUPLED
50mV/div
V
LDO1
AC-COUPLED
50mV/div
V
LDO1
AC-COUPLED
20mV/div
V
V
LDO2
LDO3
AC-COUPLED
50mV/div
V
V
LDO2
LDO3
AC-COUPLED
50mV/div
AC-COUPLED
50mV/div
100µs/div
10ms/div
12_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
LDO2 LOAD TRANSIENT
LDO3 LOAD TRANSIENT
MAX8930 toc25
MAX8930 toc26
200mA/div
0mA
200mA/div
0mA
I
I
LDO2
LDO2
150mA
150mA
0mA
0mA
AC-COUPLED
20mV/div
AC-COUPLED
20mV/div
V
V
V
V
LDO1
LDO2
LDO1
LDO2
AC-COUPLED
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
20mV/div
AC-COUPLED
50mV/div
V
LDO3
V
LDO3
10ms/div
10ms/div
LDO1 AND LDO2—OUTPUT VOLTAGE
LDO1 AND LDO2—OUTPUT VOLTAGE
TRANSIENT2
TRANSIENT1
MAX8930 toc28
MAX8930 toc27
V
V
1V/div
1V/div
V
LDO1
1V/div
1V/div
LDO1
3.0V
3.0V
2.6V
2.3V
2.9V
2.6V
2.6V
3.0V
LDO2
V
LDO2
100ms/div
100ms/div
LDO3—OUTPUT VOLTAGE
LDO3—OUTPUT VOLTAGE
TRANSIENT1
TRANSIENT2
MAX8930 toc29
MAX8930 toc30
1.8V
1.8V
V
LDO3
1V/div
1V/div
1.2V
V
1.2V
LDO3
100ms/div
100ms/div
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 13
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
2
KEY—ON/OFF BY I C
LDO1 SHORT CIRCUIT
MAX8930 toc32
MAX8930 toc31
V
SCL
I
2V/div
LDO1
100mA/div
0mA
0V
V
2V/div
LDO1
2V/div
0V
V
SDA
0V
V
V
LDO2
LDO3
2V/div
0V
2V/div
0V
V
KEY
2V/div
0V
400µs/div
1ms/div
KEY—ON/OFF BY INTERNAL PWM,
NO SLOPE
KEY—ON/OFF BY ALC
MAX8930 toc33
MAX8930 toc34
V
SENSE
1V/div
0V
V
KEY
2V/div
0V
V
KEY
2V/div
0V
2
I C: INTERNAL 500kHz, 50% DUTY CYCLE
200ms/div
1ms/div
ALC—STARTUP, t
= 64ms
ALC—STARTUP, t
= 32ms
WAIT
MAX8930 toc36
WAIT
MAX8930 toc35
V
V
BIAS
BIAS
2V/div
0V
2V/div
0V
V
SENSE
V
2V/div
0V
2V/div
0V
SENSE
V
V
KEY
KEY
1V/div
0V
1V/div
0V
20ms/div
20ms/div
14_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
STEP-UP EFFICIENCY
vs. LOAD CURRENT
STEP-UP LOAD REGULATION
vs. OUTPUT CURRENT
80
70
60
50
40
30
20
10
0
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
V
4
= 3.6V, V
= 14V
V
4
= 3.6V, V
= 14V
IN
OUT
IN
OUT
0
2
6
8
0
2
6
8
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
STEP-UP SWITCHING FREQUENCY
vs. INPUT VOLTAGE
STEP-UP SWITCHING FREQUENCY
vs OUTPUT CURRENT
120
100
80
60
40
20
0
200
180
160
140
120
100
80
60
40
V
4
= 3.6V, V
= 14V
20
IN
OUT
I
= 5mA, V = 14V
OUT
OUT
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
2
6
8
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
STEP-UP SOFT-START
STEP-UP LOAD TRANSIENT
MAX8930 toc42
MAX8930 toc41
V
5V/div
0V
SDA
OUT
10V/div
0V
I
10mA/div
OUT
5mA
V
200mA/div
0A
I
LX
LX
AC-COUPLED
100mV/div
V
OUT
V
10V/div
0V
100µs/div
10ms/div
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 15
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Characteristics (continued)
(V
PV_
= V = 3.7V, circuit of Figure 1, T = +25°C, unless otherwise noted.)
EN
A
STEP-UP LINE TRANSIENT
STEP-UP SWITCHING WAVEFORMS
MAX8930 toc43
MAX8930 toc44
4.2V
AC-COUPLED
200mV/div
1V/div
V
V
IN
OUT
3.2V
V
10V/div
0V
LX
AC-COUPLED
100mV/div
V
OUT
I
LX
200mA/div
0A
400µs/div
4µs/div
STEP-UP OUTPUT VOLTAGE TRANSIENT
STEP-UP OUTPUT OPEN CIRCUIT
MAX8930 toc46
MAX8930 toc45
16V
2V/div
10mA/div
0A
V
V
I
OUT
SDA
OUT
14V
V
LX
LX
10V/div
0V
2V/div
0V
I
200mA/div
0A
400µs/div
100µs/div
GPO—ON/OFF MODE LDO1, LDO2,
2
LDO3 BY I C
STEP-UP OUTPUT SHORT CIRCUIT
MAX8930 toc48
MAX8930 toc47
5V/div
0V
V
SDA
V
10V/div
0V
OUT
V
LDO1
LDO MODE
GPO MODE
2V/div
0V
V
LX
LX
10V/div
0V
V
V
LDO2
LDO3
2V/div
0V
I
500mA/div
0A
2V/div
0V
2ms/div
200µs/div
16_ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Pin Configuration
TOP VIEW
1
2
3
4
5
6
7
+
ECA
GND
ECA
GND
A
B
C
D
E
PV3
LDO1
PV2
PV5
SW
PV4
KEY
LDO3
REFBP
AGND
SCL
LDO2
EN
PV1
C1P
C2P
OUT
C1N
LX
PGND3
PGND1
PLAYG
CHG
NEG
V
DD
SDA
PGND2
GLED
BLED
WLED6
C2N
WLED1
WLED2
WLED4
FILT
PLAYR
PLAYB
WLED8
RLED
WLED3
WLED5
F
BIAS
CAI
ECA
GND
ECA
GND
G
SENSE
WLED7
Pin Description
PIN
NAME
FUNCTION
EXTERNALLYꢀCONNECTEDꢀTOꢀPGND
A1, A7,
G1, G7
ECAGND Connect to AGND
POWERꢀINPUTꢀSUPPLYꢀANDꢀPOWERꢀGROUND
Supply Voltage Input for Ref, Bias, LDO1, and LDO2. The input voltage range is 2.7V to 5.5V. Bypass
PV3 to AGND with a 2.2FF ceramic capacitor as close as possible to the IC. PV3 is high impedance
during shutdown. Connect PV3 to PV1, PV2, and PV5.
A2
A4
A5
PV3
PV2
PV5
Supply Voltage Input. Connect PV2 to PV1.
Supply Voltage Input for the Step-Up Converter. The input voltage range is 2.7V to 5.5V. Bypass PV5
to PGND3 with a 1FF ceramic capacitor as close as possible to the IC. PV5 is high impedance during
shutdown. Connect PV5 to PV1, PV2, and PV3.
Supply Voltage Input for LDO3. The input voltage range is 1.7V to 5.5V. Bypass PV4 to AGND with a
2.2FF ceramic capacitor as close as possible to the IC. PV4 is high impedance during shutdown. If
PV4 is not used separately, connect PV4 to PV1.
B1
B4
PV4
PV1
Supply Voltage Input for Charge-Pump Circuitry. The input voltage range is 2.7V to 5.5V. Bypass PV1 to
PGND1 and PGND2 with a 4.7FF to 10FF ceramic capacitor as close as possible to the IC. PV1 is high
impedance during shutdown. Connect PV1 to PV2, PV3, and PV5.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 17
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Pin Description (continued)
PIN
C4
D4
D5
NAME
PGND3
PGND1
PGND2
FUNCTION
Power Ground for the Step-Up Converter
Power Ground for the Charge-Pump Block
Power Ground for the Charge-Pump Block
LDOꢀFUNCTION
Output of LDO1. The default value is 2.6V. Bypass LDO1 to AGND with a 1FF ceramic capacitor as
close as possible to the IC.
A3
B3
B2
LDO1
Output of LDO2. The default value is 2.9V. Bypass LDO2 to AGND with a 1FF ceramic capacitor as
close as possible to the IC.
LDO2
LDO3
Output of LDO3. The default value is 1.80V. Bypass LDO3 to AGND with a minimum 2.2FF ceramic
capacitor as close as possible to the IC.
LOGICꢀANDꢀENABLEꢀFUNCTION
Logic-Supply Voltage Input. Bypass V
to AGND with a 0.1FF ceramic capacitor as close as possible
DD
D1
V
DD
to the IC. The input range is 1.7V to 5.5V.
2
D3
E2
D2
C3
SDA
SCL
I C Data Input. Data is read on the rising edge of SCL. Connect a 1.5kI resistor from SDA to V
.
DD
2
I C Clock Input. Data is read on the rising edge of SCL. Connect a 1.5kI resistor from SCL to V
.
DD
AGND
EN
Analog Ground. Connect AGND to the system ground plane.
Hardware Enable Input for the IC. Drive EN high to activate the IC. Drive EN low to disable the IC.
WLEDꢀANDꢀRGBꢀDIMMINGꢀRELATEDꢀFUNCTION
Brightness Control Input by Contents Adaptive Interface (DPWM signal). CAI varies the brightness of
main WLEDs from 0% to 100%. The dimming frequency is typically 200Hz. When CAI is used as the
main control method for main white LEDs, the ramp-up/ramp-down is automatically disabled.
F2
CAI
On/Off Input for the Red LED Current Regulator. The PLAYR signal can be either active high or active
low. Program either active high or active low through the 20h register.
E3
E4
F3
E1
PLAYR
PLAYG
PLAYB
FILT
On/Off Input for the Green LED Current Regulator. The PLAYG signal can be either active high or
active low. Program either active high or active low through the 20h register.
On/Off Input for the Blue LED Current Regulator. The PLAYB signal can be either active high or active
low. Program either active high or active low through the 20h register.
PWM Filter Capacitor. Connect a 0.1FF ceramic capacitor between FILT and AGND as close as
possible to FILT.
Key Backlight Control Output. Two threshold values for ON/OFF are available and programmable
2
2
C1
KEY
through the I C serial interface. KEY on/off function is controlled by the I C, ALC, or the internal 500Hz
2
PWM signal. Program the settings for KEY through the I C interface.
1.20V Reference output. Bypass REFBP to AGND with 0.1FF ceramic capacitor as close as possible
to the IC. Do not load REFBP.
C2
REFBP
AUTOMATICꢀLUMINANCEꢀCONTROL
Bias Output for an External Light Sensor. Bypass BIAS to AGND with a 1FF ceramic capacitor as
close as possible to the IC. The BIAS output is 3.0V.
F1
BIAS
G2
SENSE
Input from Ambient Light Sensor. Connect a 5.1kI resistor from SENSE to AGND.
CHARGE-PUMPꢀBLOCK
B5
C6
C5
C1P
C1N
C2P
Transfer Capacitor 1 Positive Connection. Connect a 1FF ceramic capacitor from C1P to C1N.
Transfer Capacitor 1 Negative Connection. Connect a 1FF ceramic capacitor from C1P to C1N.
Transfer Capacitor 2 Positive Connection. Connect a 1FF ceramic capacitor from C2P to C2N.
18ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Pin Description (continued)
PIN
C7
NAME
FUNCTION
Charge-Pump Negative Output. Connect a 1FF to 2.2FF ceramic capacitor from NEG to PGND1. In
shutdown, an internal 10kI resistor pulls NEG to PGND.
NEG
C2N
D6
Transfer Capacitor 2 Negative Connection. Connect a 1FF ceramic capacitor from C2P to C2N.
WLEDꢀANDꢀRGBꢀ
2
WLED Current Sink Regulator. Current into WLED1 is based upon the programmed internal I C
D7
E7
F6
WLED1
registers. Connect WLED1 to the cathodes of external LEDs. WLED1 is high impedance during
shutdown. If unused, short WLED1 to PV3.
2
WLED Current Sink Regulator. Current into WLED2 is based upon the programmed internal I C
WLED2
WLED3
WLED4
WLED5
WLED6
WLED7
WLED8
registers. Connect WLED2 to the cathodes of external LEDs. WLED2 is high impedance during
shutdown. If unused, short WLED2 to PV3.
2
WLED Current Sink Regulator. Current into WLED3 is based upon the programmed internal I C
registers. Connect WLED3 to the cathode of an external WLED. WLED3 is high impedance during
shutdown. If unused, short WLED3 to PV3.
2
WLED Current Sink Regulator. Current into WLED4 is based upon the programmed internal I C
F7
registers. Connect WLED4 to the cathode of an external LED. WLED4 is high impedance during
shutdown. If unused, short WLED4 to P3.
2
WLED Current Sink Regulator. Current into WLED5 is based upon the programmed internal I C
G6
G5
G4
G3
registers. Connect WLED5 to the cathode of an external WLED. WLED5 is high impedance during
shutdown. If unused, short WLED5 to either PV3 or disable the regulator.
2
WLED Current Sink Regulator. Current into WLED6 is based upon the programmed internal I C
registers. Connect WLED6 to the cathode of an external WLED. WLED6 is high impedance during
shutdown. If unused, short WLED6 to either PV3 or disable the regulator.
2
WLED Current Sink Regulator. Current into WLED7 is based upon the programmed internal I C
registers. Connect WLED7 to the cathode of an external WLED. WLED7 is high impedance during
shutdown. If unused, short WLED7 to either PV3 or disable the regulator.
2
WLED Current Sink Regulator. Current into WLED8 is based upon the programmed internal I C
registers. Connect WLED8 to the cathode of an external WLED. WLED8 is high impedance during
shutdown. If unused, short WLED8 to either PV3 or disable the regulator.
2
Red LED Connection. The brightness is set up by I C. ON/OFF is synchronized with the PWM signal
E6
E5
F5
RLED
GLED
BLED
applied to PLAYR pin. RLED maximum brightness is enabled/disabled through the serial interface.
2
Green LED Connection. The brightness is set up by I C. ON/OFF is synchronized with the PWM signal
applied to PLAYG pin. GLED maximum brightness is enabled/disabled through the serial interface.
2
Blue LED Connection. The brightness is set up by I C. ON/OFF is synchronized with the PWM signal
applied to PLAYB pin. BLED maximum brightness is enabled/disabled through the serial interface.
BOOSTꢀCONVERTER
Step-Up Converter Output. Bypass OUT to GND with a 1FF ceramic capacitor. During shutdown, OUT
is pulled to PGND3 by an internal 1MI resistor.
B6
A6
OUT
SW
Isolation Switch Output for the Step-Up Converter. SW is internally connected to the drain of a
p-channel MOSFET and used to isolate the output of the step-up from the input during shutdown. If
true shutdown is not required, SW can be left open with the input supply connected directly to the
inductor.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 19
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Pin Description (continued)
PIN
NAME
FUNCTION
Inductor Switching Connection. Connect the inductor between LX and SW. For most applications, use
a 22FH inductor.
B7
LX
STATUSꢀINDICATOR
F4 CHG
Charging Status Output. CHG is an open-drain output that goes low when the battery is charging.
2
On/off is operated by I C. CHG is high impedance when the IC is in shutdown mode. Enable CHG
2
through the I C interface.
External Components
PIN
EXTERNALꢀCOMPONENTS
NOTES
10FF
PV1, PV2, PV3, PV5
PV4
Total capacitance R total LDO, boost,
System stability
and charge-pump capacitance
2.2FF
LDO stability
Decoupling
V
DD
0.1FF
BIAS
1FF
LDO compensation
LDO compensation
LDO compensation
LDO compensation
Noise filter
LDO1
1FF
LDO2
1FF
LDO3
2.2FF
FILT
0.1FF
REFBP
0.1FF
Noise filter
C1P, C1N
C2P, C2N
NEG
1FF
Charge pump
1FF
2.2FF
Charge pump
Charge pump
WLED1–WLED8
RLED, GLED, BLED
CHG
White LED
—
Red, green, blue LED
A resister, for example 10kI
22FH
—
Current limit
SW, LX
OUT
Boost converter
Boost stability
1FF
SENSE
ALC
5.1kI
Converter ambient light to a voltage
Any type (linear/log) of photo IC
Toshiba TPS852
Note: All output capacitors are ceramic and X7R/X5R type.
20ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
1µF
1µF
2.2µF
C1P
C1N
C2P
C2N
NEG
PV2
PV1
INPUT
2.7V TO 5.5V
INVERTING -0.5x
CHARGE PUMP
PGND1
PGND2
4.7µF
4.7µF
REFBP
0.1µF
0.1µF
OVP
OCP
TSD
INPUT
4MHz
OSC
WLED1
WLED2
WLED3
WLED4
WLED5
WLED6
WLED7
WLED8
EN
1.7V TO 5.5V
BRIGHTNESS
AND SLOPE
CONTROL
V
DD
MAIN
NEGATIVE
CHARGE
PUMP
SCL
SDA
2
I C
INTERFACE
BRIGHTNESS
AND SLOPE
CONTROL
SUB
AGND
0.1Hz TO 15kHz
0.1µF
PWM
ON/OFF
CAI
(CONTENT
ADAPTIVE
INTERFACE)
FILT
RLED
GLED
BLED
NEGATIVE
CHARGE
PUMP
800kI
ON/OFF
2
(PLAY/I C)
800kI
2Hz TO 200Hz
PLAYR
800kI
CHG
PLAYG
PLAYB
ON/OFF
LDO1
PV3
PV3
PV4
LDO1
2.6V AT
200mA
1µF
ALCEN = 1
BIAS
3V
OUT
1µF
MAX8930
LIGHT
SENSOR
LDO2
SENSE
LDO2
SENSOR
INTERFACE
2.9V AT
200mA
ALC
1µF
5.1kI
LDO3
PV3
LDO3
1.8V AT
200mA
2.2µF
2.2µF
INPUT
1.7V TO 5.5V
PV4
ON/OFF
BY ALC
2.2µF
KEY
SW
ON/OFF
BY I C
2
PWM
(500Hz)
PV5
1µF
22µH
ON/OFF BY ALC
LX
OUT
ECAGND
ECAGND
ECAGND
ECAGND
13V TO 16.5V
AT 8mA
1µF
CONTROL
LOGIC (PFM)
OVP
ERROR
AMP
PGND3
1.226V
Figure 1. Typical Application and Block Diagram
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 21
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
LED Charge Pump
Detailed Description
The charge pump drives up to 8 white LEDs (4 WLEDs
for main and 4 WLEDs for sub) and 3 RGB LEDs with
regulated constant current for both display backlight and
fun light applications. By utilizing individually adaptive
1x/-0.5x negative charge-pump modes and extremely
low-dropout current regulators, it is able to achieve high
efficiency over the full 1-cell lithium battery input volt-
age range. High-frequency switching of 4MHz allows
for tiny external components. The regulation scheme is
optimized to ensure low EMI and low input ripple. Each
channel for WLED and RGB LED has the capability of
delivering 25.6mA with 256 dimming steps (0.1mA per
step). The current-level adjustment is programmed by
The MAX8930 integrates a negative charge pump for
both white LED display backlighting with ambient light
control (ALC) function, content adaptive interface (CAI)
function, and R/G/B LED. There is one step-up converter
for passive matrix OLED (PMOLED) oriented application
and three LDOs with programmable output voltage. The
three LDO outputs are able to convert to GPO (general-
2
purpose output) status through an I C command. The
MAX8930 includes soft-start, thermal shutdown, open-
circuit, and short-circuit protection in the charge-pump
circuitry.
Reset Control
The MAX8930 uses two different methods of reset: soft-
ware and hardware.
2
an I C command. Figure 2 is the flow chart of the startup
and mode-change algorithm.
SoftwareꢀReset: All the registers are initiated by RESET
= 1 at Register 00h. After that, the values in all registers
come back to POR (power-on-reset) state. The bit of
RESET in 00h is automatically returned to 0. Auto return
to 0.
SHUTDOWN
V
DISCHARGED
NEG
BY RESISTOR
RESET = 1 OR EN = 0 OR
MAIN WLED = 0 AND
WLED5−8 = 0 AND
EN = HIGH, RESET = 0 AND
MAINI2C = 1,
MAIN WLED = 1 OR
WLED5−8 = 1 OR
HardwareꢀReset: Hardware reset is done by toggling EN
from logic-high to logic-low. All the registers under hard-
ware reset conditions are returned to their initial values
(POR) and stop receiving any commands.
RI2C, GI2C, BI2C = 0
RI2C, GI2C, BI2C = 1
PUMP OFF
PUMP OFF
ALL WLED_ AND
RGB IN 1x MODE
Open-Circuit and Short-Circuit Protection
If any WLED/RGB fails as an open circuit, that LED pin
pulls to ground, and the IC is forced into -0.5X mode.
Therefore, connect any unused WLED_/RGB pins to PV1,
PV2, or PV3 to disable the corresponding current regu-
lator. The MAX8930 contains special circuitry to detect
this condition and disables the corresponding current
regulator to avoid wasting battery current.
ANY V
< 150mV
LED
PUMP SOFT-START
PUMP GATE-DRIVE RAMPED
ALL WLED_ AND RGB IN
1x MODE
ALL V > 250mV
LED
Thermal Shutdown
The MAX8930 includes a thermal-limit circuit that shuts
down the IC at about +160NC. The part turns on after the
IC cools by approximately 20NC.
PUMP SOFT-START DONE
(0.5ms TYP)
Thermal shutdown is applied to the following blocks:
• White and RGB LED driver
• Step-up converter
PUMP ON
PUMP ON
EACH WLED_ AND RGB IN 1x
OR -0.5x MODE AS NEEDED
• LDO1, LDO2, LDO3
• SBIAS
Figure 2. Startup and Mode Change Algorithm
22ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
a minimum on-time of 80Fs in active-high mode. If bit 1
in 20h is set to 1, then all current regulators for RGB are
activated by active-low signal with a minimum off-time of
80Fs. The up/down slope control can be programmed by
the setting of the 0Bh register when the RGB LEDs are
WLED1–WLED8 Driver Operation
The white LED current regulators are composed of 4
main-group drivers (WLED1–WLED4) and 4 subgroup
drivers (WLED5–WLED8). The current of the main-group
LEDs can be selected by an I C register. Both ambient
light control (ALC) mode and ramp-up/ramp-down con-
trol are applied to only the main-group white LEDs.
2
2
controlled by I C only.
If bit 7 in 20h is set to logic-low, then slope up/down is
automatically deactivated.
The subgroup LEDs can choose either individual control
or can belong to the main group based on the status
of a bit in the register (01h and 02h). In this function,
combinations can be adjusted as required. For example,
main 4ch + sub 4ch or main 5ch + sub 3ch.
CAI (Contents Adaptive
Interface) Operation
A 200Hz PWM signal is applied to the CAI pin. The CAI
signal can be from either the LCD driver module with
gamma correction information or from the baseband
chipset. The main WLED can be activated by either
the high/low status of the CAI PWM signal or with either
an active-high or active-low signal coming from either
a LCD driver module or baseband chipset. The corre-
sponding register bit (bit 0 in 02h) should be set to either,
The CAI (PWM) signal from either the LCD driver module
or baseband chipset controls only the main-group
WLEDS. The up/down slope control can be programmed
by the setting of the 0Ah register when the main LEDs
2
are controlled by either I C or ALC.
For main LEDs, there are three different dimming control
2
2
1 or 0 by I C command.
methods, I C, ALC, and CAI. The dimming range for
main LEDs and sub LEDs is from 0.1mA to 25.6mA in
0.1mA increments.
Depending on the duty cycle, the brightness varies from
0mA to 25.6mA with the resolution of 0.256mA per 1%
duty variation. In control of CAI (PWM) independently, the
RGB Driver Operation
The brightness for each color LED has 256 different
steps (0.1mA to 25.6mA). The RGB LED can be activat-
ed by either the high/low status of the PLAY_ PWM signal
2
existing brightness setting from either I C or ALC is over-
2
written because CAI has the priority over I C and ALC.
See the Dimming by Digital PWM on CAI Only and
2
2
Dimming by Both Digital PWM on CAI and Either I C or
or by I C ON/OFF command. The default dimming con-
2
2
ALC at the Same Time sections for details on the CAI
dimming control.
trol is I C command. An I C command for dimming can
adjust the current of each RGB individually. The opera-
2
tion of ON/OFF by I C command also allows individual
Dimming by Digital PWM on CAI Only
When the digital PWM (DPWM) signal (100Hz ~15kHz) is
provided by either the baseband or CPU for dimming the
brightness, the MAX8930 DPWM function takes over the
responsibility of dimming the main WLEDs. The dimming
by CAI is initiated by setting CAI (bit 7 of Register 02h)
control. However, the operation of ON/OFF by PWM to
PLAY_ RGB is group control. To operate with either an
active-high or active-low signal coming from the micro-
processor such as audio processor, the register related
to active high or active low should be selected first (the
bit 1 in 20h). When a call comes in or music plays, all
RGB LEDs are allowed to be activated by either a PWM
2
to 1. After the set-up, both I C register dimming settings
and ALC no longer control the dimming current for the
main WLEDs. The frequency range on the CAI pin is from
100Hz to 15kHz, where 0% duty cycle corresponds to
0mA and 100% duty cycle corresponds to full current,
25.6mA.
2
signal applied to PLAY_ or a designated register by I C.
The main purpose for the PLAY_ is for ON/OFF control
function and not for dimming control. If the dimming cur-
rent is set to 10mA on each RGB LED, the PWM signal
to PLAY_ RGB turns all of the current regulators on or off
at the same time. However, the dimming current for RGB
When CAI is set to 1, the ramp-up/down slope for main
WLED_ is automatically disabled by the MAX8930 con-
trol logic. Figure 3 is the timing diagram on initiating CAI.
The MAX8930 maintains its previous dimming setting
2
can be set by I C command during ON/OFF operation.
When the PLAY_ is in active-high period, the RGB cur-
rent regulator is on with 10mA current. When the PLAY_
is in the opposite state (active-low period), the RGB
regulator is off with 0mA current. The default method to
turn the RGB LED on is to pull the PLAY_ input high with
for t (10ms typ) to allow the PWM filter time to settle to
B
its average value before activating CAI dimming. This
is done automatically inside the IC. The bit of MAINI2C
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 23
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
2
I C COMMAND
(CAI = 1 AT Reg 3)
2
CAI ENABLED BY I C
CAI (DPWM)
SIGNAL
2
I C COMMAND
SHOULD BE OUT
BEFORE 10ms
2
DIMMING BY I C
2
(MAINI2C = 1 AT 02h)
DIMMING BY I C
(MAINI2C = 0 AT 02h)
I
I
I
1
2
2
WLED CURRENT BY CAI
WLED CURRENT BY I C
3
t
B
t : BLANKING TIME, THE TIME FOR CONVERTING
B
DPWM TO AVERAGE DIMMING CURRENT
Figure 3. Timing Diagram of Stand-Alone CAI Dimming Operation
should be set to 0 in less than t , 10ms (typ) for CAI dim-
B
ming to be exclusively through DPWM.
In this combined dimming control, any dimming current
set earlier by either the I C register or the ALC register
2
is the value corresponding with 100% duty cycle of the
CAI signal.
If this setup fails, the previous dimming current is still
effective even though bit 7 in 02h (CAI) has been set to 1.
Ambient Light Control Operation
Dimming of the LCD backlight and ON/OFF control of the
keypad backlight are possible on the basis of the data
detected by an external ambient light sensor. The ALC
consists of the following segments:
The current of I1, I2, and I3 of Figure 3 is different
depending on the duty cycle of DPWM.
t
is the settling time for the CAI input filter to calculate
B
an average value for the dimming current.
2
Dimming by Both Digital PWM on CAI and Either I C
or ALC at the Same Time
• Bias function (3V output)
• 8-bit ADC with an average filter
• A slope process function
If an end-user wants to see either TV or a movie, the
LCD driver module may take care of dimming control
independently. In this situation, the output signal from the
LCD module has some color information. For example,
(16mA/LED) + gamma correction can make the user feel
the same brightness of the LCD screen compared to
(20mA/LED) + no gamma correction.
• A LOG scale conversion function
A wide range of ambient light sensors can be used with
the MAX8930, including photo diode, photo transistor,
photo IC (a linear output/LOG output), etc. The detected
amount of ambient light is changed into digital data by
24ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
BIAS
BIAS VOLTAGE
(3V)
OFFSET
CORRECTION
16 AMBIENT
LEVELS
LINEAR/LOG
NEG
INPUT
LIGHT
SENSOR
(LOG OR
LINEAR)
8-BIT
ADC
DATA
CORRECTION
AVERAGE
FILTER
LOGARITHMIC
CONVERSION
AMBIENT
CURRENT
CONVERSION
SLOPE
PROCESS
WLED_
SENSE
(1x, -0.5x CP)
DETECT
THRESHOLD
AND
INPUT
LEVEL SCALE
HYSTERESIS
ON/OFF
BY ALC
KEY
ON/OFF
BY I C
2
AMBIENT LIGHT LEVEL READ
BY I C AT THIS POINT
PWM SLOPE
AND
2
PWM
(500Hz)
MAX DUTY
Figure 4. ALC Block Diagram
the embedded digital processing. This data can be read
through the I C (0Dh).
The operation of the bias output voltage has two options
based on the value of the SBIAS bit (bit 7 in Register 0Ch).
When this bit is set to 1, the bias output is synchronized
with the measurement cycle. This means that the bias
voltage generator is active only when a measurement
cycle is being performed. The measurement cycle has
four different times, 0.52s, 1.05s, 1.57s, and 2.10s. When
this bit is set to 0, the bias output is always on as long as
the ALCEN bit is set to 1.
2
The conversion to LED current can be accomplished
either through a built-in initial lookup table or a built-in
user settable lookup table.
When ALC is activated, the brightness settings of the
main LEDs are controlled through the ALC control cir-
cuitry and not by the baseband processor. The default
setting on power-on reset is for control by the baseband
processor.
Brightness Data Conversion
16 different dimming steps are available depending on
the ambient light condition. The selection of the log or
linear conversion is possible by the setting of the LSTY
bit (bit 6 of register 0Ch).
ON/OFF of ALC Block for Main WLEDs
ALC operation can be activated independently for the
main LED and the keypad backlight. The ALCEN bit in
register 00h activates ambient light control. The KBALC
bit in register 00h activates ON/OFF for the keypad back-
light in ALC mode. For keypad backlight, the output is
simple logic-high/logic-low.
Linearꢀtypeꢀsensor: LOG conversion
Logꢀtypeꢀsensor: Data bypass
2
The brightness data can be read through I C (Register
at 0Dh).
Bias Voltage for a Sensor
An embedded LDO with a nominal 3V output provides
the bias voltage for the ambient light sensor. This bias
output is enabled as soon as the ALCEN bit is set to 1.
LED Current Conversion
The following is the initial current value to each level
of ambient light. This value can be overwritten by I C
2
command.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 25
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ1.ꢀBrightnessꢀDataꢀConversionꢀSettings
WITHꢀLOGꢀCONVERSION
(LINEARꢀTYPEꢀOFꢀSENSOR)
WITHOUTꢀLOGꢀCONVERSION
(LOGꢀTYPEꢀOFꢀSENSOR)
AMBIENTꢀLEVEL
V
V
x 0/256 ~
x 17/256
SBIAS
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
V
V
V
x 0/256
x 1/256
x 2/256
SBIAS
SBIAS
SBIAS
SBIAS
V
x18/256 ~
x 26/256
SBIAS
V
SBIAS
V
x 27/256 ~
x 36/256
SBIAS
V
SBIAS
V
x 3/256 ~
x 4/256
V
x 37/256 ~
x 47/256
SBIAS
SBIAS
V
V
SBIAS
SBIAS
V
x 5/256 ~
x 6/256
V
x 48/256 ~
x 59/256
SBIAS
SBIAS
V
V
SBIAS
SBIAS
V
x 7/256 ~
x 9/256
V
x 60/256 ~
x 71/256
SBIAS
SBIAS
V
V
SBIAS
SBIAS
V
x 10/256 ~
x 13/256
V
x 72/256 ~
x 83/256
SBIAS
SBIAS
V
V
SBIAS
SBIAS
V
x 14/256 ~
x 19/256
V
x 84/256 ~
SBIAS
SBIAS
V
V
x 95/256
SBIAS
SBIAS
V
x 20/256 ~
x 27/256
V
x 96/256 ~
x 107/256
SBIAS
SBIAS
V
V
SBIAS
SBIAS
V
x 28/256 ~
x 38/256
V
x 108/256 ~
SBIAS
SBIAS
V
V
x 119/256
SBIAS
SBIAS
V
x 39/256 ~
x 53/256
V
x 120/256 ~
SBIAS
SBIAS
V
V
x 131/256
SBIAS
SBIAS
V
x 54/256 ~
x 74/256
V
x 132/256 ~
SBIAS
SBIAS
V
V
x 143/256
SBIAS
SBIAS
V
x 75/256 ~
x 104/256
V
x 144/256 ~
SBIAS
SBIAS
V
V
x 155/256
SBIAS
SBIAS
V
x 105/256 ~
x 144/256
V
x 156/256 ~
SBIAS
SBIAS
V
V
x 168/256
SBIAS
SBIAS
V
x 145/256 ~
x 199/256
V
x 169/256 ~
SBIAS
SBIAS
V
V
x 181/256
SBIAS
SBIAS
V
x 200/256 ~
x 255/256
V
x 182/256 ~
SBIAS
SBIAS
V
V
x 255/256
SBIAS
SBIAS
Tableꢀ2.ꢀLEDꢀCurrentꢀConversion
BRIGHTNESS
INITIAL
CURRENTꢀ(mA)
BRIGHTNESS
INITIAL
89h
CURRENTꢀ(mA)
0
1
2
3
4
5
6
7
0Fh
1.6
3.1
8
9
13.8
15.3
16.8
18.3
19.9
21.4
22.9
25.0
1Eh
98h
2Dh
3Ch
4Ch
5Bh
4.6
A
B
C
D
E
F
A7h
B6h
C6h
D5h
E4h
6.1
7.7
9.2
6Ah
10.7
12.2
79h
F9h
26ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
The Operation of ALC Function
Table 3 shows the various conditions on the main WLED_
current for LCD backlight.
A/D Conversion
The detection of ambient light condition is performed in
periodic time steps (4 options). BIAS and ADC are turned
off except when reading the ambient light condition. The
sensor is also turned off in between measurements. This
leads to lower power consumption. For the first 64ms,
the ambient light data is discarded because the data
might be inaccurate information in startup period. For
Sensor Interface
As a default value, 3V is applied from the BIAS pin. The
sensed voltage at the SENSE pin is transformed into
digital data by the embedded 8-bit ADC.
Tableꢀ3.ꢀALCꢀFunction
ALCꢀON/OFF
MAINꢀWLED_ ꢀON/OFF
ALCꢀBLOCK
LCDꢀBACKLIGHTꢀCURRENT
0
0
1
1
0
1
0
1
OFF
Setup by main LED current*
OFF
OFF
ON
†
Setup by ambient light data
*The ALC for WLED backlight is disabled in this mode. It means the current for the LCD backlight is set up by the main LED cur-
2
rent value using either I C or CAI.
†The ALC for WLED backlight is enabled in this mode. It means the current for the LCD backlight is set up by the ambient light
data from 0h to Fh.
ADC READ 1 CYCLE
ALCEN = 1
(ALCYC1, ALCYC2)
ALC MODE ON/OFF
ADC READ CYCLE
AD SIGNAL START
BIAS OUTPUT = 3V
t
= 64ms OR 32ms
WAIT
1 T(AD) = 1ms
16 TIMES
MEASUREMENT
ADC MOVEMENT
t(AD) = 16.4ms
AMBIENT LIGHT
DATA
t(ALC) = 80.4ms
Figure 5. ALC A/D Conversion
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 27
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
the next 16.4ms, the internal digital logic block tries to
read the ambient light condition 16 times and calculate
the average data. This read data is automatically saved
in Register 0Dh.
time is set to 2.048ms. After reading the ambient light
condition and getting I with 20mA, the total time
LED2
from I
to I
is 0.4096s [(20mA/0.1mA) x 2.048ms
LED1
LED2
= 0.4096s].
Up/Down Slope Control
The up/down slope control is sometimes necessary for
dimming the main WLED_ in a natural way. The up (dark
to bright), down (bright to dark) main WLED current tran-
sition speeds are set individually.
ADC Data Offset Adjustment
The accuracy of the ALC control circuitry can be cali-
brated in each IC using the ADC data offset adjustment
register. This offset adjustment can correct for parameter
variation in the IC and in the external light sensor. This
adjustment is performed with bits 3–0 in Register 0Ch.
The default value of the up/down slope is 0s. It is pro-
grammable by the settings of control bits in Register
0Ah. The up/down slope time is per 0.1mA increment;
Table 4 shows all possibilities of dimming control for both
main WLEDs and KEY.
for example, if the I
current is 0mA and the up slope
LED1
ORIGINAL DATA
SLOPE-APPLIED DATA
ILED 2
ILED 1
BRIGHTNESS
Figure 6. LED Current vs. Brightness
Tableꢀ4.ꢀSummaryꢀofꢀDimmingꢀControlꢀforꢀMainꢀWLEDsꢀandꢀKEY
2
CAIꢀ
(PWM)
PWM
(500Hz)
ALCꢀ+ꢀ
CAI
I Cꢀ+ꢀCAIꢀ
2
2
2
I C
ALC
I Cꢀ+ꢀALCꢀ I Cꢀ+ꢀCAIꢀ
+ꢀALC
Yes
(default)
DIMMING
Yes
Yes
No
No
Yes
Yes
No
MAINꢀ
WHITE
LEDS
UP/
DOWN
SLOPE
CONTROL
Not
available
Not
available
Not
available
Not
available
Not
available
Not
available
Available
Available
Yes
Yes
(default)
ON/OFF
No
Yes
No
No
No
No
DUTY
TRANSITION
CONTROLꢀ
TIME
KEY
Not
available
Not
available
Not
available
Not
available
Not
available
Not
available
Not
available
Available
28ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
The ambient light level at which the key backlight is
turned off can be set in register 0Fh. The default ambi-
ent light is Ah. There is also a programmable hysteresis
KEY (Keypad Backlight) ON/OFF
Control Operation
The keypad lighting is controlled by 3 methods, which
are all exclusive of each other.
2
level, accessed through I C in the 0Fh register. The
default hysteresis width is 3h. See Figure 7.
These are:
• ALC
There is a built in PWM that has a 500Hz operation fre-
quency. The dimming can be adjusted by duty ratio (set
KYDT_ bit in register 0Eh).
• PWM
2
• I C command
The KEY output is simply a 1 bit value representing ON
or OFF function.
If KBALC (bit 1 of 00h) is set to 1, then ALC for keypad
is ON, otherwise, it is off.
Keypad Backlight ON/OFF Operation by ALC
To link the keypad backlight ON/OFF control to the ALC,
the register bit, KBALC, at register 00h, should be set to
1 (see Table 5).
If KYPWM (bit 0 of 03h) is set to 1, PWM for keypad is
ON, otherwise, it is off.
2
If KYI2C (bit 5 of 02h) is set to 1, I C for keypad is ON,
otherwise, it is off.
KEYPAD ON/OFF
KEYPAD ON
3h LEVEL
(HYSTERESIS TO BE ON)
KEYPAD OFF
BRIGHTNESS LEVEL
Ah LEVEL (THRESHOLD TO BE OFF)
Figure 7. KEY On/Off Hysteresis
Tableꢀ5.ꢀKeypadꢀBacklightꢀOn/OffꢀbyꢀALC
ALCEN
KBALC
MAINꢀWLEDsꢀINꢀALCꢀMODE
ALCꢀBLOCK
KEYꢀBACKLIGHT
0
0
1
1
0
1
0
1
OFF
No
OFF
2
ON/OFF by I C or PWM*
2
Yes
Yes
ON
ON
ON/OFF by I C or PWM**
ON/OFF depends on ALC data level***
*The ALC block is disabled in this mode. In this condition, keypad backlight is activated and controlled by either internal PWM
2
operation (500Hz) or I C.
2
**The ALC block is enabled in this mode. However KBALC bit is still set to 0. Therefore, the on/off control should be either I C or
internal 500Hz PWM.
2
***The ALC block is enabled in this mode. ALC has priority over both internal PWM and I C in case KBALC bit is set to 1. This
means that the activation of the key backlight depends on the preprogrammed on/off threshold and hysteresis width.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 29
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
The ambient light level at which the key backlight is
turned off can be set in register 0Fh. The default ambi-
ent light level is Ah, which is bright enough for the user
to recognize the numbers on the keypad. At this time,
the key output is held off. There is also a programmable
All LDOs are controlled through the serial interface, mini-
mizing the requirements of control lines to the MAX8930.
Each of the LDOs are turned on or off through the setting
of the control bits in the On/Off Control register, 00h. For
each LDO, it is possible to set the output voltage and
enable/disable the active pulldown resistor (1kI typ)
during power-off. This is done in the 03h and 04h reg-
isters. For optimized battery life, there are two external
supply voltage inputs, PV3 for LDO1 and LDO2 and PV4
for LDO3. This allows the input voltage of the LDO to
be supplied from a lower voltage power rail, resulting in
higher efficiency operation and longer battery life. LDO3
2
hysteresis level, accessed through I C in the 0Fh regis-
ter. The default hysteresis width is 3h. The key output is
held high on any hysteresis value minus 1h. For example,
if the hysteresis is set to 3h, in this default condition, the
key output is held low at Ah level and then high at 6h level.
Keypad Backlight ON/OFF Operation by PWM
There is a built-in PWM signal operating at a frequency
of 500Hz. The on/off can be adjusted by duty cycle ratio
(set KYDT_ bit in Register 0Eh). 16 different duty values
of PWM are available in register 0Eh. In addition, fade-in
and fade-out can also be set up with the KYSL_ bits in
the 0Eh register.
is a low V LDO (V = 1.7V to 5.5V). The input voltage,
IN
IN
V
PV3
and V
must be greater than the selected LDO1
PV4
to LDO3 voltages.
GPO Operation
Three LDO outputs have the option of being converted to
2
GPO outputs through an I C command. Figure 9 shows
Keypad Backlight ON/OFF Operation
2
by I C Command
the external connections. The register, 24h, is respon-
sible for this setup. In GPO mode, the output capacitors
should be removed in advance, otherwise, there is some
delay in both turn-on and turn-off mode.
There is a dedicated register bit (KYI2C at 02h, see
Table 15) to both enable and disable the KEY function.
2
This I C on/off is the default for KEY.
Control of Duty Transition Time Control
in Internal PWM Mode (500Hz)
The internal 500Hz PWM can set up the duty transition
control time by the register (KYSL1 and KYSL2 at 0Eh).
Component Selection
Use only ceramic capacitors with an X5R, X7R, or bet-
ter dielectric. See the Table 6 for a list of recommended
parts. Connect a 1FF and 2.2FF ceramic capacitor
between LDO1, LDO2, and LDO3 and PGND3, respec-
tively, for 200mA applications. The LDO output capaci-
tor’s equivalent series resistance (ESR) affects stability
and output noise. Use output capacitors with an ESR
of 0.1I or less to ensure stability and optimum transient
Figure 8 shows the duty transition in slope-applied mode.
Low-Drop Output (LDO) Operation
The linear regulators are designed for low-input, low-
dropout, low quiescent current to maximize battery life.
I/O VOLTAGE
TARGET DUTY VALUE
LDO1
SLOPE TIME
LDO1
LDO2
LDO3
OUTPUT
OUTPUT
OUTPUT
LDO2
LDO3
TIME
Figure 8. Slope Time-In Internal PWM Mode (500Hz)
Figure 9. LDO GPO Configuration
30ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ6.ꢀRecommendedꢀCapacitors
VALUEꢀ
(µF)
DESIGNATION
MANUFACTURER
PARTꢀNUMBER
C2012X5R0J225M
C2012X5R0J225M
DESCRIPTION
C
C
2.2
TDK
TDK
2.2FF Q20%, 6.3V X5R ceramic capacitor
2.2FF Q20%, 6.3V X5R ceramic capacitor
PV3
PV4
2.2
(in case of external supply)
C
LDO1
C
LDO2
C
LDO3
1
1
TDK
TDK
TDK
C1005X5R0J105M
C1005X5R0J105M
C1005X5R0J225M
1FF Q20%, 6.3V X5R ceramic capacitor
1FF Q20%, 6.3V X5R ceramic capacitor
2.2FF Q20%, 6.3V X5R ceramic capacitor
2.2
response. Connect C
MAX8930 to minimize the impact of PCB trace inductance.
as close as possible to the
frequency varies depending on the load and input and
output voltage and can be up to 750kHz.
LDO
Setting the Output Voltage
The output voltage of the step-up converter is set by bit,
boost1 to boost3, in Register 04h. The output voltage
can be adjusted from 13.0V to 16.5V in 0.5V increments.
Step-Up DC-DC Converter Operation
The step-up DC-DC converter operates from a 2.7V to
5.5V supply. The MAX8930 includes an internal high-
voltage nMOSFET switch with low on-resistance and
a synchronous rectifier to reduce losses and achieve
higher efficiency. A true-shutdown feature disconnects
the battery from the load and reduces the supply current
to 0.05FA. This DC-DC converter provides adjustable
output voltage from 13.0V to 16.5V with 0.5V steps. The
adjustment bits are located in the 04h register.
Shutdown
If Bit 6, SUEN, in Register 00h is set to 0, the step-up
converter enters shutdown. During shutdown, the output
is disconnected from the input, and LX enters a high-
impedance state. The capacitance and load at the out-
put determine the rate at which V
decays.
OUT
Control Scheme
The step-up DC-DC features a minimum off-time, cur-
rent-limited control scheme operating in discontinuous
conduction mode. An internal p-channel MOSFET switch
connects PV5 to SW to provide power to the inductor
when the converter is operating. When the converter is
shut down, this switch disconnects the input supply from
the inductor. To boost the output voltage, an n-channel
MOSFET switch turns on and allows the inductor current
to ramp up to the current limit. Once the inductor cur-
rent reaches the current limit, the switch turns off and
the inductor current flows through synchronous recti-
fier (pMOS) to supply the output voltage. The switching
Soft-Start
The step-up converter uses two soft-start mechanisms.
When the true-shutdown feature is used, the gate of the
internal synchronous turns on slowly to prevent inrush
current. This takes approximately 0.04ms (typ). When
SW is fully turned on, the internal n-channel switch
begins boosting the input to set the output voltage.
Protection Features
The step-up converter has protection features designed
to make it extremely robust to application errors. If the
output capacitor in the application is missing, the con-
verter protects the internal switch from being damaged.
Tableꢀ7.ꢀProtectionꢀFeatures
APPLICATIONꢀFAULTS
PROTECTION
True off-switch detects short, opens when current reaches the synchronous rectifier current limit,
and restarts soft-start. This protects the inductor and the synchronous rectifier.
Output Shorted to Ground
LX may boost one or two times before the internal FB voltage exceeds the trip point. In the rare
case where the capacitive loading and external loading on OUT is small enough that the energy
in one cycle can slew it more than 22V, the internal OVP operates at the typical threshold value,
18.5V.
Output Capacitor Missing
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 31
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Inductor Selection
Smaller inductance values typically offer smaller physi-
cal size for a given series resistance or saturation cur-
rent. The inductor’s saturation current rating should be
greater than the peak switching current. Recommended
inductor values range from 10FH to 100FH (e.g., 22FH,
VLF3010AT-220MR33-1, TDK).
this function is used in conjunction with a microproces-
sor (FP), connect a pullup resistor between CHG and
the logic I/O voltage to indicate charge status to the FP.
2
I C Interface
The slave address for MAX8930 is EC/Dh in write/read
mode.
Capacitor Selection
Small, ceramic surface-mount capacitors with X7R or
X5R temperature characteristics are recommended due
to their small size, low cost, low equivalent series resis-
tance (ESR), and low equivalent series inductance (ESL).
If nonceramic capacitors are used, it is important that
they have low ESR to reduce the output ripple voltage
and peak-to-peak load transient voltage.
SDA
SCL
CHG Charge-Indicator Output
CHG is an open-drain output that indicates charger sta-
tus and can be used with an LED. CHG goes low during
charging when the bit of CHG at 02h is 1. CHG goes
high impedance when the bit of CHG at 02h is 0. When
DATA LINE STABLE
DATA VALID
CHANGE OF
DATA ALLOWED
Figure 10. SDA and SCL Bit Transfer
Tableꢀ8.ꢀRecommendedꢀInductors
DESIGNATION
VALUEꢀ(µH)
DCRꢀ(I)
MANUFACTURER
PART
VLF3010AT-220MR33-1
ELJPC220KF
CURRENTꢀ(mA)
22
22
22
22
47
68
1.5
TDK
330
160
105
125
180
120
4.0
Panasonic
Taiyo Yuden
Taiyo Yuden
Sumida
1.0
LB2016-220
L
SW
5.0
LEM2520-220
2.2
CMD4D11-47
3.3
Taiyo Yuden
LEMC3225-680
Tableꢀ9.ꢀRecommendedꢀCapacitors
DESIGNATION
VALUEꢀ(µF)
MANUFACTURER
PART
DESCRIPTION
C
1
1
TDK
C2012X5R0J105M
TMK316BJ105KL
1FF Q20%, 6.3V X5R ceramic capacitor
1FF Q20%, 25V X7R ceramic capacitor
PV5
C
OUT
Taiyo Yuden
Tableꢀ10.ꢀSlaveꢀAddress
A7
A6
A5
A4
A3
A2
A1
R/W
1
1
1
0
1
1
0
1/0
32ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
SDA
SCL
t
BUF
tSU
,DAT
t
SU,STA
t
t
HD,DAT
t
HD,STA
LOW
t
SU,STO
t
HIGH
t
HD,STA
t
R
t
F
REPEATED START
CONDITION
STOP
START
START
CONDITION
CONDITION CONDITION
Figure 11. START and STOP Conditions
SDA
SCLK
MASTER
TRANSMITTER/
RECEIVER
SLAVE
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
2
Figure 12. I C Master and Slave Configuration
2
2
I C Bit Transfer
One data bit is transferred for each clock pulse. The data
on SDA must remain stable during the high portion of
the clock pulse as changes in data during this time are
interpreted as a control signal.
I C System Configuration
2
A device on the I C bus that generates a message is
called a transmitter and a device that receives the mes-
sage is a receiver. The device that controls the message
is the master and the devices that are controlled by the
master are called slaves.
2
I C START and STOP Conditions
2
Both SDA and SCL remain high when the bus is not
busy. A high-to-low transition of SDA, while SCL is high is
defined as the START (S) condition. A low-to-high transi-
tion of the data line while SCL is high is defined as the
STOP (P) condition.
I C Acknowledge
The number of data bytes between the START and STOP
conditions for the transmitter and receiver are unlimited.
Each 8-bit byte is followed by an acknowledge bit. The
acknowledge bit is a high-level signal put on DATA by
the transmitter during which time the master generates an
extra acknowledge related clock pulse. A slave receiver
that is addressed must generate an acknowledge after
each byte it receives. Also, a master receiver must gen-
erate an acknowledge after each byte it receives that
has been clocked out of the slave transmitter.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 33
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
SDA OUTPUT FROM
TRANSMITTER
D7
D6
D0
NOT ACKNOWLEDGE
SDA OUTPUT FROM
RECEIVER
NOT ACKNOWLEDGE
8
SCL FROM
MASTER
1
2
9
CLOCK PULSE FOR
ACKNOWLEDGEMENT
START CONDITION
2
Figure 13. I C Acknowledge
The device that acknowledges must pull down the SDA
line during the acknowledge clock pulse, so that the SDA
line is stable low during the high period of the acknowl-
edge clock pulse (setup and hold times must also be
met). A master receiver must signal an end of data to the
transmitter by not generating an acknowledge on the last
byte that has been clocked out of the slave. In this case,
the transmitter must leave SDA high to enable the master
to generate a STOP condition.
Current Level for 8 WLEDs and 3 RGB LEDs
The total 11 LEDs (8 WLEDs and 3 RGB LEDs) have
linear scale current dimming by 0.1mA step as follows.
Tableꢀ11.ꢀLEDꢀCurrentꢀLevels
LEDꢀCURRENTꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
(mA)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
—
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
1
1
0
—
—
1
—
—
1
—
—
1
—
—
1
—
—
1
—
—
1
—
—
1
—
—
0
—
25.5
25.6
1
1
1
1
1
1
1
1
34ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ12.ꢀRegisterꢀMap
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
FUNCTION
(HEX)
(HEX)
On/off
control for
boost, LDO1,
ALCEN LDO2,
LDO3, main
Main
WLED
00h
00
RESET
SUEN
LDO1
LDO2
LDO3
KBALC
WLED_,
ALC
On/off
control for
backlight-
related
RGB
slope
LED
slope
01h
02h
00
26
WLED7
WLED6
WLED5
Sub7
Sub6
Sub5
LEDs
On/off
control for
dimming-
related
CAI
CHG
KYI2C
WLED8
Sub8
x
MAIN I2C
HLCAI
signal, bias
output
Output
program for
LDO1 and
LDO2
03h
04h
05h
06h
07h
08h
6C
BA
01
01
01
01
LDO10
LDO 30
IMLED7
ISLED7
ISLED7
ISLED7
LDO11
LDO12
x
LDO20
LDO21
Boost1
IMLED2
ISLED2
ISLED2
ISLED2
LDO22
Boost2
IMLED1
ISLED1
ISLED1
ISLED1
KYPWM
Boost3
IMLED0
ISLED0
ISLED0
ISLED0
Output
program for
LDO3 and
boost
LDO 31 LDO1ADIS LDO2ADIS LDO3ADIS
256 steps
current
scale for
mainWLEDs
IMLED6
ISLED6
ISLED6
ISLED6
IMLED5
ISLED5
ISLED5
ISLED5
IMLED4
ISLED4
ISLED4
ISLED4
IMLED3
ISLED3
ISLED3
ISLED3
256 steps
current
scale for
sub WLED5
256 steps
current
scale for
sub WLED6
256 steps
current
scale for
sub WLED7
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 35
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ12.ꢀRegisterꢀMapꢀ(continued)
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
FUNCTION
(HEX)
(HEX)
256 steps
current
scale for
sub WLED8
09h
01
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
Slope con-
trol for main
0Ah
00
x
DSLP3
DSLP2
DSLP1
x
USLP3
USLP2
USLP1 WLEDs in
step-up/
down
Slope con-
trol for RGB
in step-up/
down
0Bh
0Ch
00
10
x
DSLP3
LSTY
DSLP2
DSLP1
x
USLP3
OST2
USLP2
OST3
USLP1
Control for
ALC-related
functions
SBIAS
ALCYC1
ALCYC2
OST1
OST4
Read the
ADC data
0Dh
—
ALDA1
ALDA2
ALDA3
ALDA4
x
x
x
TWAIT based on
ambient
condition
Control for
KYDT4 PWM slope
and duty
0Eh
0Fh
00
A8
KYSL1
KYHS1
KYSL2
KYHS2
x
KYDT0
KYTH2
KYDT1
KYTH3
KYDT2
KYTH4
KYDT3
x
Control for
hysteresis
width and
KYTH1
x
on/off
Current
level of 0h
10h
11h
12h
13h
14h
15h
0F
1E
2D
3C
4C
5B
CADA07
CADA17
CADA27
CADA37
CADA47
CADA57
CADA06
CADA16
CADA26
CADA36
CADA46
CADA56
CADA05
CADA15
CADA25
CADA35
CADA45
CADA55
CADA04
CADA14
CADA24
CADA34
CADA44
CADA54
CADA03 CADA02
CADA13 CADA12
CADA23 CADA22
CADA33 CADA32
CADA43 CADA42
CADA53 CADA52
CADA01 CADA00
CADA11 CADA10
CADA21 CADA20
CADA31 CADA30
CADA41 CADA40
CADA51 CADA50
Current
level of 1h
Current
level of 2h
Current
level of 3h
Current
level of 4h
Current
level of 5h
36ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ12.ꢀRegisterꢀMapꢀ(continued)
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
FUNCTION
(HEX)
(HEX)
Current
level of 6h
16h
6A
CADA67
CADA77
CADA87
CADA97
CADA66
CADA76
CADA86
CADA96
CADA65
CADA75
CADA85
CADA95
CADA64
CADA74
CADA84
CADA94
CADA63 CADA62
CADA73 CADA72
CADA83 CADA82
CADA93 CADA92
CADA61 CADA60
CADA71 CADA70
CADA81 CADA80
CADA91 CADA90
Current
level of 7h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
79
89
98
A7
B6
C6
D5
E4
F9
Current
level of 8h
Current
level of 9h
Current
level of Ah
CADAA7 CADAA6 CADAA5 CADAA4 CADAA3 CADAA2 CADAA1 CADAA0
CADAB7 CADAB6 CADAB5 CADAB4 CADAB3 CADAB2 CADAB1 CADAB0
CADAC7 CADAC6 CADAC5 CADAC4 CADAC3 CADAC2 CADAC1 CADAC0
CADAD7 CADAD6 CADAD5 CADAD4 CADAD3 CADAD2 CADAD1 CADAD0
CADAE7 CADAE6 CADAE5 CADAE4 CADAE3 CADAE2 CADAE1 CADAE0
Current
level of Bh
Current
level of Ch
Current
level of Dh
Current
level of Eh
Current
level of Fh
CADAF7
RGBEN
CADAF6
x
CADAF5
x
CADAF4
RI2C
CADAF3 CADAF2
CADAF1 CADAF0
Control for
on/off of
RGB
20h
21h
22h
00
01
01
GI2C
RLED3
GLED3
BI2C
HLRGB
RLED1
GLED1
x
Current
RLED0 level for
Red
RLED7
GLED7
RLED6
GLED6
RLED5
GLED5
RLED4
GLED4
RLED2
GLED2
Current
GLED0 level for
Green
Current
BLED0 level for
Blue
23h
24h
01
00
BLED7
GPO1
BLED6
GPO2
BLED5
x
BLED4
GPLD1
BLED3
GPLD2
BLED2
GPLD3
BLED1
On/off for
GPWD8
x
GPO
x = Don’t care.
POR = Default state at reset and initial startup condition.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 37
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ13.ꢀOn/OffꢀRegisterꢀ1ꢀforꢀBoost,ꢀLDO1,ꢀLDO2,ꢀLDO3,ꢀMainꢀWLED,ꢀandꢀALC
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
(HEX)
(HEX)
00
00
RESET
SUEN
LDO1
LDO2
LDO3
Main WLED
KB ALC
ALC EN
NAME
POR
R/W
DESCRIPTION
1: IC is reset, back to POR status
0: Reset is off
RESET
SUEN
LDO1
LDO2
LDO3
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1: Boost output is on
0: Boost output is off
1: LDO1 output is on
0: LDO1 output is off
1: LDO2 output is on
0: LDO2 output is off
1: LDO3 output is on
0: LDO3 output is off
Main
WLED
1: Main WLEDs are on
0: Main WLEDs are off
1: ALC for keypad is on
0: ALC for keypad is off
KBALC
ALCEN
1: ALC function for main WLEDs is on
0: ALC function is off
Tableꢀ14.ꢀOn/OffꢀRegisterꢀ2ꢀforꢀBacklight-RelatedꢀWLED5,ꢀWLED6,ꢀWLED7ꢀandꢀRGB
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
(HEX)
(HEX)
01
00
WLED7
WLED6
WLED5
Sub7
Sub6
Sub5
RGB Slope LED Slope
NAME
POR
R/W
DESCRIPTION
1: WLED7 output is on
0: WLED7 output is off
WLED7
WLED6
WLED5
SUB7
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1: WLED6 output is on
0: WLED6 output is off
1: WLED5 output is on
0: WLED5 output is off
1: WLED7 belongs to main group
0: WLED7 belongs to subgroup
1: WLED6 belongs to main group
0: WLED6 belongs to subgroup
SUB6
1: WLED5 belongs to main group
0: WLED5 belongs to subgroup
SUB5
1: Dimming slope for RGB LED is on
0: Dimming slope is off
RGB Slope
LED Slope
1: Dimming slope for main WLED_ is on
0: Dimming slope is off
38ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ15.ꢀOn/OffꢀRegisterꢀ3
ADDRESSꢀ PORꢀ
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
(HEX)
(HEX)
2
02
26
CAI
CHG
KYI2C
WLED8
SUB8
TWAIT
MAIN I C
HLCAI
NAME
POR
R/W
DESCRIPTION
1: CAI Dimming for main WLEDs is on
0: Off
CAI
CHG
0
0
1
0
0
1
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1: nMOS for charging indicator is on
0: Off
2
1: I C for keypad is on
KYI2C
WLED8
SUB8
2
0: I C for keypad is off
1: WLED8 output is on
0: WLED8 output is off
1: WLED8 belongs to main group
0: WLED8 belongs to subgroup
1: 64ms waiting time for ALC calculation
0: 32ms
TWAIT
MAINI2C
HLCAI
2
1: I C dimming for main WLEDs is ON
2
0: I C dimming for main WLEDs is OFF
1: Active low for main WLED_ activated
0: Active high to be ON
Tableꢀ16.ꢀLDO1ꢀandꢀLDO2ꢀRegister
ADDRESSꢀ PORꢀ
R/W
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
LDO21
BITꢀ1
BITꢀ0
(HEX)
(HEX)
03
4A
R/W
LDO10
LDO11
LDO12
Reserved
LDO20
LDO22
KYPWM
DESCRIPTION
LDO10
LDO11
LDO12
LDO1ꢀVOLTAGEꢀ(V)
0
0
0
2.3
0
0
1
2.5
0
1
0
2.6 (default)
0
1
1
2.7
1
0
0
2.8
1
0
1
2.9
1
1
0
3.0
1
1
1
3.1
LDO20
LDO21
LDO22
LDO2ꢀVOLTAGEꢀ(V)
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
2.3
2.5
2.6
2.7
2.8
2.9 (default)
3.0
3.1
NAME
KYPWM
POR
DESCRIPTION
1: PWM for keypad is on. 0: PWM for keypad is off
0
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 39
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ17.ꢀLDO3,ꢀStep-Up,ꢀLDO1,ꢀLDO2,ꢀandꢀLDO3ꢀActiveꢀDischargeꢀFunctionꢀRegister
ADDRESSꢀ PORꢀ
R/W
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
(HEX)
(HEX)
LDO1
ADIS
LDO2
ADIS
LDO3
ADIS
04
BA
R/W
LDO30
LDO31
Boost1
Boost2
Boost3
DESCRIPTION
LDO30
LDO31
LDO3 voltage
1.2V
0
0
1
1
0
1
0
1
1.5V
1.8V (default)
2.5V
NAME
POR
DESCRIPTION
1: Enable LDO1 active discharge
0: Disable LDO1 active discharge
LDO1ADIS
LDO2ADIS
LDO3ADIS
1
1
1
1: Enable LDO2 active discharge
0: Disable LDO2 active discharge
1: Enable LDO3 active discharge
0: Disable LDO3 active discharge
BOOST1
BOOST2
BOOST3
OUTPUTꢀ(V)
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
13.0
13.5
14.0 (default)
14.5
15.0
15.5
16.0
16.5
Tableꢀ18.ꢀDimmingꢀCurrentꢀRegisterꢀforꢀMainꢀWLEDs
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
IMLED2
BITꢀ1
BITꢀ0
05
01
IMLED7
IMLED6
IMLED5
IMLED4
IMLED3
IMLED1
IMLED0
NAME
POR R/W
DESCRIPTION
IMLED7
IMLED6
IMLED5
IMLED4
IMLED3
IMLED2
IMLED1
IMLED0
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
Minimum current = 0.1mA
1
U
0.2mA set as default
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
40ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ19.ꢀDimmingꢀCurrentꢀRegisterꢀforꢀSubꢀWLED5
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
06
01
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
NAME
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
Minimum current = 0.1mA
1
0.2mA set as default
U
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
Tableꢀ20.ꢀDimmingꢀCurrentꢀRegisterꢀforꢀSubꢀWLED6
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
07
01
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
NAME
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
Minimum current = 0.1mA
1
0.2mA set as default
U
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 41
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ21.ꢀDimmingꢀCurrentꢀRegisterꢀforꢀSubꢀWLED7
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
08
01
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
NAME
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
Minimum current = 0.1mA
1
0.2mA set as default
U
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
Tableꢀ22.ꢀDimmingꢀCurrentꢀRegisterꢀforꢀSubꢀWLED8
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
09
01
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
NAME
ISLED7
ISLED6
ISLED5
ISLED4
ISLED3
ISLED2
ISLED1
ISLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
Minimum current = 0.1mA
1
0.2mA set as default
U
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
42ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ23.ꢀSlopeꢀControlꢀRegisterꢀforꢀMainꢀWLEDs
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0A
00
Reserved
DSLP3
DSLP2
DSLP1
Reserved
USLP3
USLP2
USLP1
NAME
DSLP3
DSLP2
DSLP1
USLP4
USLP4
USLP3
POR R/W
DESCRIPTION
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Slope control for ramp down and up has 8 steps, respectively (see details in Table 25)
Tableꢀ24.ꢀSlopeꢀControlꢀRegisterꢀforꢀRGBꢀLED
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0B
00
Reserved
DSLP3
DSLP2
DSLP1
Reserved
USLP3
USLP2
USLP1
NAME
DSLP3
DSLP2
DSLP1
USLP4
USLP4
USLP3
POR R/W
DESCRIPTION
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Slope control for ramp down and up has 8 steps, respectively (see details in Table 25)
Tableꢀ25.ꢀRamp-Up/DownꢀTransitionꢀTimeꢀinꢀ0.1mAꢀStep
BIT
COMMENTS
6
0
0
0
0
1
1
1
1
U
U
U
U
U
U
U
U
5
0
0
1
1
0
0
1
1
U
U
U
U
U
U
U
U
4
0
1
0
1
0
1
0
1
U
U
U
U
U
U
U
U
3
2
U
U
U
U
U
U
U
U
1
U
U
U
U
U
U
U
U
0
U
U
U
U
U
U
U
U
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0 seconds (default)
4
0.016ms (2 x 1Fs)
6
0.068ms (2 x 1Fs)
7
0.128ms (2 x 1Fs)
8
0.256ms (2 x 1Fs)
9
0.512ms (2 x 1Fs)
10
1.024ms (2 x 1Fs)
11
2.048ms (2 x 1Fs)
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0 seconds (default)
4
0.016ms (2 x 1Fs)
6
0.068ms (2 x 1Fs)
7
0.128ms (2 x 1Fs)
8
0.256ms (2 x 1Fs)
9
0.512ms (2 x 1Fs)
10
1.024ms (2 x 1Fs)
11
2.048ms (2 x 1Fs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 43
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ26.ꢀALCꢀControlꢀRegisterꢀ1
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0C
10
SBIAS
LSTY
ALCYC1
ALCYC2
OST1
OST2
OST3
OST4
NAME
POR R/W
DESCRIPTION
1: Measurement cycle is synchronized
0: Always on
SBIAS
LSTY
0
R/W
R/W
1: LOG type of light sensor is connected
0: Linear type sensor
0
0
The measurement cycle
R/W 00: 0.52s; 01: 1.05s
10: 1.57s; 11: 2.10s
ALCYC1
ALCYC2
1
0
OST_
R/W Optimize the offset of ADC data
OST1
OST2
OST3
OST4
OFFSETꢀVALUE
Non-offset (default)
+1 LSB
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
+2 LSB
+3 LSB
+4 LSB
+5 LSB
+6 LSB
+7 LSB
-8 LSB
-7 LSB
-6 LSB
-5 LSB
-4 LSB
-3 LSB
-2 LSB
-1 LSB
44ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
PCB Layout
Tableꢀ27.ꢀALCꢀControlꢀRegisterꢀ2
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0D
00
ALDA1
ALDA2
ALDA3
ALDA4
Reserved
Reserved
Reserved
Reserved
NAME
POR R/W
DESCRIPTION
16 different levels based on ambient light conditions
ALDA_
R
ALDA1
ALDA2
ALDA3
ALDA4
AMBIENTꢀLIGHTꢀCONDITION
0h level
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1h level
2h level
3h level
4h level
5h level
6h level
7h level
8h level
9h level
Ah level
Bh level
Ch level
Dh level
Eh level
Fh level
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 45
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ28.ꢀKeypadꢀControlꢀRegister
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0E
00
KYSL1
KYSL2
Reserved
KYDT0
KYDT1
KYDT2
KYDT3
KYDT4
NAME
POR R/W
DESCRIPTION
KYSL_
0
R/W PWM slope time is the transition time for stepping to the next duty ratio (both up and down)
KYSL1
KYSL2
PWMꢀSLOPEꢀRISINGꢀTIMEꢀ(ms)
0
0
1
0
1
0 (default)
0
32
1
64
128
1
NAME
POR R/W
R/W Duty is set by the active-high period
DESCRIPTION
KYDT_
0
KYDT0
KYDT0
KYDT2
KYDT3
KYDT4
Duty ratio
0% (default)
6.25%
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
12.5%
18.75%
25.0%
31.25%
37.5%
43.75%
50.0%
56.25%
62.5%
68.75%
75.0%
81.25%
87.5%
93.75%
100%
46ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ29.ꢀKeypadꢀControlꢀRegisterꢀforꢀALC
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
0F
A8
KYHS1
KYHS2
KYTH1
KYTH2
KYTH3
KYTH4
Reserved
Reserved
NAME
POR R/W
DESCRIPTION
The hysteresis values between ON and OFF.
KYHS_
10 R/W The value should meet the following equation.
The value of KYTH_ - the value of KYHS_ > 1
KYHS1
KYHS2
Hysteresis values
0
0
No hysteresis
0
1
2h
1
0
3h
4h
1
1
NAME
POR R/W
DESCRIPTION
KYTH_
—
R/W Determine the OFF time based on ambient light condition
KYTH1
KYTH2
KYTH3
KYTH4
Keypad off
0h off
1h off
2h off
3h off
4h off
5h off
6h off
7h off
8h off
9h off
Ah off
Bh off
Ch off
Dh off
Eh off
Fh off
KYTH1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 47
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ30.ꢀControlꢀRegisterꢀinꢀACLꢀ1–16ꢀ
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
10~1F
—
CADA*7
CADA*6
CADA*5
CADA*4
CADA*3
CADA*2
CADA*1
CADA*0
NAME
POR R/W
DESCRIPTION
BIT
COMMENTS
7
0
0
U
6
0
0
U
5
0
0
U
4
0
0
U
3
0
0
U
2
0
0
U
1
0
0
U
0
0
1
U
Minimum current = 0.1mA
CADA*
—
R/W
0.2mA set as default
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
*Refers to 0~F
Tableꢀ31.ꢀRGBꢀLEDꢀOn/OffꢀControlꢀRegister
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
00
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
20
RGBEN
Reserved
Reserved
RI2C
GI2C
BI2C
HLRGB
Reserved
NAME
POR R/W
DESCRIPTION
2
1: RGB LED is on by I C
RGBEN
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
0: RGB LED is ON by play pin
2
1: RED LED is ON by I C
RI2C
GI2C
0: Off
2
1: Green LED is ON by I C
0: Off
2
1: Blue LED is ON by I C
BI2C
0: Off
1: Active low for RGB LED activated
0: Active high for RGB LED ON
HLRGB
Tableꢀ32.ꢀRedꢀLEDꢀDimmingꢀCurrentꢀControlꢀRegister
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
21
01
RLED7
RLED6
RLED5
RLED4
RLED3
RLED2
RLED1
RLED0
NAME
RLED7
RLED6
RLED5
RLED4
RLED3
RLED2
RLED1
RLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
6
0
0
U
5
4
0
0
U
3
2
0
0
U
1
0
0
U
0
0
1
U
0
0
U
0
0
U
0
0
U
Minimum current = 0.1mA
0.2mA set as default
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
48ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Tableꢀ33.ꢀGreenꢀLEDꢀDimmingꢀCurrentꢀControlꢀRegister
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
22
01
GLED7
GLED6
GLED5
GLED4
GLED3
GLED2
GLED1
GLED0
NAME
GLED7
GLED6
GLED5
GLED4
GLED3
GLED2
GLED1
GLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
6
0
0
U
5
4
0
0
U
3
2
0
0
U
1
0
0
U
0
0
1
U
0
0
U
0
0
U
0
0
U
Minimum current = 0.1mA
0.2mA set as default
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
Tableꢀ34.ꢀBlueꢀLEDꢀDimmingꢀCurrentꢀControlꢀRegister
ADDRESSꢀ
(HEX)
PORꢀ
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
23
01
BLED7
BLED6
BLED5
BLED4
BLED3
BLED2
BLED1
BLED0
NAME
BLED7
BLED6
BLED5
BLED4
BLED3
BLED2
BLED1
BLED0
POR R/W
DESCRIPTION
0
0
0
0
0
0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
COMMENTS
7
6
0
0
U
5
4
0
0
U
3
2
0
0
U
1
0
0
U
0
0
1
U
0
0
U
0
0
U
0
0
U
Minimum current = 0.1mA
0.2mA set as default
U
1
1
1
1
1
1
1
1
Maximum LED current = 25.6mA
256 steps from 0.1 to 25.6mA by 0.1mA step by binary value increment
Tableꢀ35.ꢀOn/OffꢀControlꢀRegister
ADDRESSꢀ
(HEX)
POR
(HEX)
BITꢀ7
BITꢀ6
BITꢀ5
BITꢀ4
BITꢀ3
BITꢀ2
BITꢀ1
BITꢀ0
24
00
GPO1
Reserved
Reserved
GPLD1
GPLD2
GPLD3
Reserved
Reserved
NAME
POR R/W
DESCRIPTION
1: GPO mode
0: LDO Mode for LDO1, LDO2, LDO3
GPO1
0
0
0
0
R/W
R/W
R/W
R/W
1: Output low for LDO1 (power SW on)
0: Output high (power SW off)
GPLD1
GPLD2
GPLD3
1: Output low for LDO2 (power SW on)
0: Output high (Power SW off)
1: Output low for LDO3 (power SW on)
0: Output high (power SW off)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 49
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Typical Operating Circuit
C1P
C1N C2P
C2N
PV2
PV1
NEG
INPUT
2.7V TO 5.5V
PGND1
PGND2
INPUT
PV3
WLED1
WLED2
WLED3
WLED4
WLED5
WLED6
WLED7
WLED8
PV5
PV4
INPUT
1.7V TO 5.5V
REFBP
RLED
GLED
BLED
MAX8930
V
DD
CHG
LDO1
BIAS
LDO2
LDO3
LIGHT
SENSOR
SENSE
FILT
INPUT
V
DD
SCL
SDA
KEY
SW
EN
LX
CAI
µP
OUT
PLAYR
PLAYG
PLAYB
PGND3
ECAGND
ECAGND
ECAGND
ECAGND
AGND
50ꢀ ꢀ ꢀ_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Good PCB layout is essential for optimizing performance.
Chip Information
Use large traces for the power-supply inputs to minimize
losses due to parasitic trace resistance and route heat
away from the device. Good design minimizes excessive
EMI on the switching paths and voltage gradients in the
ground plane, resulting in a stable and well regulated
charge pump. Connect all capacitors as close as pos-
sible to the IC and keep their traces short, direct, and
wide. Keep noisy traces, as short as possible. Connect
AGND, PGND1, PGND2, and PGND3 to the common
ground plane.
PROCESS: BiCMOS
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ꢀ ꢀ 51
WLED Charge Pump, RGB, OLED Boost,
LDOs with ALC and CAI
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGEꢀTYPE
PACKAGEꢀCODE
DOCUMENTꢀNO.
21-0441
49 WLP
W493B3+2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
52ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ ꢀꢀꢀꢀꢀꢀꢀꢀ Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
©
2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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