CAT3616HV4 [CATALYST]
6-Channel Charge Pump LED Driver with EZDimTM; 6通道电荷泵LED驱动器， EZDimTM
| 型号： | CAT3616HV4 |
| 厂家： | 
CATALYST SEMICONDUCTOR |
| 描述： | 6-Channel Charge Pump LED Driver with EZDimTM |
| 文件： | 总14页 (文件大小：520K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CAT3616
6-Channel Charge Pump LED Driver
with EZDimTM
DESCRIPTION
FEATURES
The CAT3616 is a high efficiency 1x/1.5x fractional
charge pump with programmable dimming current in
six LED channels. To ensure uniform brightness in
LCD backlight applications, each LED channel
delivers an accurate regulated current.
6 LED channels with tight matching
Independent Main and Sub channels
1-wire EZDimTM Programmable LED Current
Accurate 1mA Dimming Level
Power efficiency up to 91%
Fractional pump 1x/1.5x
Low noise and input ripple is achieved by operating at
a constant switching frequency of 1MHz which allows
the use of small external ceramic capacitors. The
1x/1.5x fractional charge pump supports a wide range
of input voltages from 3V to 5.5V with efficiency up to
91%, and is ideal for Li-Ion battery powered devices.
Low noise input ripple
Fixed High Frequency Operation 1MHz
“Zero” Current Shutdown Mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
Two groups of LEDs, main (MAIN1 to MAIN4) and sub
(SUB1 and SUB2) are programmable through the
E¯N¯M¯ (active low) and E¯N¯¯S inputs. Independent
current from 1mA to 31mA with a 1mA step are set by
toggling the E¯N¯M¯ and E¯N¯¯S inputs. The enable EN
input pin allows to shutdown the device with zero
quiescent current.
RoHS-compliant 16-lead Thin QFN 4mm x 4mm
package
APPLICATION
Main and sub-display backlight
Color LCD and keypad Backlighting
Cellular Phones
Handheld Devices
Digital Cameras
The device is available in a 16-lead thin QFN package
with a max height of 0.8mm.
ORDERING INFORMATION
Part
Quantity Package
per Reel Marking
Number
Package
CAT3616HV4 Thin QFN-16
Green*
2000
G616
*Lead Finish Matte-Tin
For Ordering Information details, see page 13.
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
TQFN 16-lead 4x4mm (Top view)
Note: Unused LED channels must be connected to VOUT.
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 5018 Rev. A
CAT3616
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, LEDxx voltage
VOUT, C1±, C2± voltage
Rating
6
Unit
V
V
7
VIN + 0.7V
-65 to +160
-40 to +125
300
V
EN, EN¯M, EN¯S voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
ºC
ºC
ºC
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Range
3 to 5.5
Unit
V
Ambient Temperature Range
ILED per LED pin
IOUT Total Output Current
-40 to +85
ºC
mA
mA
0 to 31
0 to 150
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
VIN = 3.6V, EN = High, ambient temperature of 25ºC (over recommended operating conditions unless specified
otherwise)
Symbol Parameter
Conditions
Min
Typ
Max
Unit
IQ
Quiescent Current
1x mode, all LEDs Off
1x mode, all LEDs On
1.5x mode, all LEDs Off
VEN = 0V
0.5
2.2
3.5
0
mA
mA
mA
µA
IQSHDN Shutdown Current
1
ILED
LED Current Range with 6 LEDs
0
31
mA
%
%
Ω
Ω
ILED-ACC LED Current Accuracy
ILED-DEV
ROUT
±3
±3
1mA ≤ ILED ≤ 31mA
(ILED - ILEDAVG) / ILEDAVG
LED Channel Matching
Output Resistance (open loop)
1x mode, IOUT = 120mA
0.5
1.5x mode, IOUT = 120mA
2.2
FOSC
Charge Pump Frequency
0.8
1
60
1.3
MHz
mA
ISC_MAX Output short circuit Current Limit VOUT < 0.5V
IIN_MAX Input Current Limit
EN/DIM Pin
1x mode, VOUT > 1V
300
mA
IEN/DIM
VHI
-1
1
µA
V
• Input Leakage
• Logic High Level
• Logic Low Level
Thermal Shutdown
1.3
VLO
0.4
V
TSD
THYS
VUVLO
165
20
2
ºC
ºC
V
Thermal Hysteresis
Undervoltage lock out (UVLO)
threshold
Doc. No. 5018 Rev. A
2
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
¯¯¯¯
¯¯¯¯
RECOMMENDED EN, ENM AND ENS TIMING
For 3V ≤ VIN ≤ 5.5V, over full ambient temperature range -40 to +125°C.
Symbol Parameter
Conditions
Min
10
0.3
0.3
1.5
Typ
Max
Unit
µs
µs
µs
ms
µs
TSETP
TLO
EN setup from shutdown
200
EN¯M, EN¯S program low time
THI
TOFF
TD
EN¯M, EN¯S program high time
EN low time to shutdown
LED current enable
40
TDEC
LED current decrement
0.1
µs
Figure 1. Enable LED Timing Diagram
© 2006 Catalyst Semiconductor, Inc.
3
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
CAT3616
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, E¯N¯M¯ = E¯N¯¯S = GND, CIN = C1 = C2 = COUT = 1µF,
TAMB = 25ºC, unless otherwise specified.
Efficiency vs. Input Voltage (6 LEDs on)
Efficiency vs. Total LED Current (6 LEDs)
100
100
1x Mode
15mA per LED
VIN = 4V (1x mode)
90
80
70
60
50
40
90
80
70
60
50
40
1.5x Mode
VIN = 3.2V (1.5x mode)
20mA per LED
4.2 4.0 3.8 3.6 3.4 3.2 3.0
INPUT VOLTAGE [V]
0
50
100
150
200
TOTAL LED CURRENT [mA]
Quiescent Current vs. Input Voltage (1x Mode)
Quiescent Current vs. Temperature (1x Mode)
0.8
0.8
0.6
0.4
0.6
0.4
0.2
0.2
6 LEDs OFF
6 LEDs OFF
0
0.0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
-40
0
40
80
120
TEMPERATURE [°C]
Quiescent Current vs. Input Voltage (1.5x Mode)
Quiescent Current vs. Temperature (1.5x Mode)
5
5
4
3
2
4
3
2
1
1
6 LEDs OFF
6 LEDs OFF
0
0
-40
0
40
80
120
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
TEMPERATURE [°C]
Doc. No. 5018 Rev. A
4
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, E¯N¯M¯ = E¯N¯¯S = GND, CIN = C1 = C2 = COUT = 1µF,
TAMB = 25ºC, unless otherwise specified.
LED Current Change vs. Input Voltage
LED Current Change vs. Temperature
5.0
4.0
3.0
5.0
4.0
3.0
1x Mode
2.0
2.0
1.0
0.0
1.0
0.0
-1.0
-1.0
-2.0
-3.0
-4.0
-5.0
-2.0
-3.0
-4.0
-5.0
1.5x Mode
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
-40 -20
0
20 40 60 80
TEMPERATURE [°C]
Oscillator Frequency vs. Input Voltage
Oscillator Frequency vs. Temperature
1.3
1.3
1.2
1.1
1.0
0.9
0.8
0.7
1.2
1.1
1.0
0.9
0.8
0.7
3.0
3.2
3.4
3.6
3.8
4.0
-40
0
40
80
120
INPUT VOLTAGE [V]
TEMPERATURE [°C]
Output Resistance vs. Input Voltage (1x Mode)
Output Resistance vs. Input Voltage(1.5x Mode)
4.0
1.0
3.5
3.0
2.5
2.0
1.5
0.8
0.6
0.4
0.2
0.0
1.0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
3.0 3.2 3.4 3.6 3.8 4.0 4.2
INPUT VOLTAGE [V]
© 2006 Catalyst Semiconductor, Inc.
5
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
CAT3616
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, E¯N¯M¯ = E¯N¯¯S = GND, CIN = C1 = C2 = COUT = 1µF,
TAMB = 25ºC, unless otherwise specified.
Power Up with 6 LEDs at 15mA (1x Mode)
Enable Power Down Delay (1x Mode)
Switching Waveforms in 1.5x Mode
Power Up with 6 LEDs at 15mA (1.5x Mode)
Enable Power Down Delay (1.5x Mode)
Operating Waveforms in 1x Mode
Doc. No. 5018 Rev. A
6
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, E¯N¯M¯ = E¯N¯¯S = GND, CIN = C1 = C2 = COUT = 1µF, TAMB
= 25ºC, unless otherwise specified.
Line Transient Response (3.6V to 5.5V) 1x Mode
E¯N¯M¯, E¯N¯¯S and Output Current Dimming
Foldback Current Limit
4.0
3.5
3.0
2.5
1x Mode
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
OUTPUT CURRENT [mA]
© 2006 Catalyst Semiconductor, Inc.
7
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
CAT3616
PIN DESCRIPTIONS
Pin #
1
2
3
4
Name
MAIN1
E¯N¯M¯
E¯N¯¯S
Function
MAIN1 LED cathode terminal (if not used, connect to VOUT)1
Enable main LED (MAIN1 to MAIN4) input. Active low
Enable sub LED (SUB1, SUB2) input. Active low
Device enable input. Active high.
EN
5
6
VOUT
VIN
Charge pump output connected to the LED anodes
Supply voltage.
7, 8
9, 10
11
12
13
14
15
16
TAB
C1-, C1+ Bucket capacitor 1 terminal
C2-, C2+ Bucket capacitor 2 terminal
GND
SUB2
SUB1
MAIN4
MAIN3
MAIN2
TAB
Ground reference
SUB2 LED cathode terminal (if not used, connect to VOUT)1
SUB1 LED cathode terminal (if not used, connect to VOUT)1
MAIN4 LED cathode terminal (if not used, connect to VOUT)1
MAIN3 LED cathode terminal (if not used, connect to VOUT)1
MAIN2 LED cathode terminal (if not used, connect to VOUT)1
Connect to Ground on PCB
Note:
(1) MAIN1 to MAIN4, SUB1, SUB2 pins should not be left floating. They should be connected to the LED cathode, or tied to VOUT pin if not
used.
PIN FUNCTION
VIN is the supply pin for the charge pump. A small
1µF ceramic bypass capacitor is required between the
VIN pin and ground near the device. The operating
input voltage range is up to 5.5V. When the input
supply falls below the undervoltage threshold (2V), all
LED channels are disabled.
is required between the VOUT pin and ground near
the device.
GND is the ground reference for the charge pump.
The pin must be connected to the ground plane on the
PCB.
EN is the enable logic input. Logic level for high and
low are set at 1.3V and 0.4V respectively. When EN is
initially taken high, the device becomes enabled and
all LED currents remain at 0mA. To place the device
into zero current shutdown mode, the EN pin must be
held low for 1.5ms or more.
C1+, C1- are connected to each side of the 1µF
ceramic bucket capacitor C1.
C2+, C2- are connected to each side of the 1µF
ceramic bucket capacitor C2.
MAIN1-4, SUB1-2 provide the internal regulated
current for each of the LED cathodes. These pins
enter a high impedance zero current state whenever
the device is placed in shutdown mode. In
applications using less than six LEDs, the unused
channels should be wired directly to VOUT. This
ensures the channel is automatically disabled
dissipating less than 200µA.
E¯N¯M¯, E¯N¯¯S are the active low enable/ dimming control
logic inputs for respectively main and sub LED
channels. The falling edge of the first pulse applied to
E¯N¯M¯ and E¯N¯¯S sets the current for respectively the
main and sub LED channels to their full scale of
31mA. On each consecutive falling edge of the pulse
applied to E¯N¯M¯ and E¯N¯¯S, the LED current is
decreased by 1mA step. On the 32nd pulse, the LED
current is set to zero. The next pulse resets the
current back to the full scale of 31mA.
TAB is the exposed pad underneath the package. For
best thermal performance, the tab should be soldered
to the PCB and connected to the ground plane.
VOUT is the charge pump output that is connected to
the LED anodes. A small 1µF ceramic bypass capacitor
Doc. No. 5018 Rev. A
8
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
BLOCK DIAGRAM
Figure 2. CAT3616 Functional Block Diagram
BASIC OPERATION
At power-up, the CAT3616 starts operating in 1x
mode where the output will be approximately equal to
the input supply voltage (less any internal voltage
losses). If the output voltage is sufficient to regulate all
LED currents the device remains in 1x operating
mode.
In 1.5x mode, the output is approximately equal to 1.5
times the input supply voltage (less any internal
voltage losses).
The above sequence is repeated each and every time
the chip is powered-up or is taken out of shutdown
mode (via EN pin).
If the input voltage is insufficient or falls to a level
where the regulated currents cannot be maintained,
the device automatically switches (after 400µs) into
1.5x mode.
© 2006 Catalyst Semiconductor, Inc.
9
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
CAT3616
LED CURRENT SETTING
The LED current is controlled by toggling the input
signals E¯N¯M¯ and E¯N¯¯S. E¯N¯M¯ controls the four LED
channels MAIN1 to MAIN4. E¯N¯¯S controls the two LED
lines SUB1 and SUB2. E¯N¯M¯ and E¯N¯¯S work the same
way. The chip must first be enabled by setting the
enable input EN high. On the first E¯N¯M¯ or E¯N¯¯S
transition from high to low, the LED current in the
associated LEDs is set to the full scale 31mA. On
each consecutive falling edge of E¯N¯M¯ or E¯N¯¯S, the
LED current is decreased by 1mA. On the 32nd pulse,
the LED channel is turned off and the current drops to
0mA. One additional E¯N¯M¯ or E¯N¯¯S pulse resets the full
current to 31mA, as shown on Figure 1.
The driver enters a thermal shutdown mode as soon as
the die temperature exceeds about +165ºC. When the
device temperature drops down by about 20ºC, the device
resumes normal operation.
External Components
The driver requires a total of four external 1µF
ceramic capacitors: two for decoupling input and
output, and two for the charge pump. Both capacitor
types X5R and X7R are recommended for the LED
driver application. In the 1.5x charge pump mode, the
input current ripple is kept very low by design, and an
input bypass capacitor of 1µF is sufficient. In 1x mode,
the device operating in linear mode does not introduce
switching noise back onto the supply.
Consecutive pulses should be separated by 300ns or
more. Pulsing frequencies from 5kHz up to 1MHz are
supported during dimming operations. When the EN is
held low for 1.5ms or more, the CAT3616 enters the
shutdown mode and draws “zero” current. When the
enable EN input is low, toggling E¯N¯M¯ or E¯N¯¯S has no
effect.
Recommended Layout
In 1.5x charge pump mode, the driver switches
internally at a high frequency of 1MHz. It is
recommended to minimize trace length to all four
capacitors. A ground plane should cover the area
under the driver IC as well as the bypass capacitors.
Short connection to ground on capacitors Cin and
Cout can be implemented with the use of multiple via.
A copper area matching the TDFN exposed pad
(GND) must be connected to the ground plane
underneath. The use of multiple via improves the
package heat dissipation.
Unused LED channels can be disabled independently
by connecting the corresponding main or sub LED pin
to VOUT.
Protection Mode
If an LED becomes open-circuit, the output voltage
VOUT is internally limited to about 5.5V. This is to
prevent the output pin from exceeding its absolute
maximum rating.
Doc. No. 5018 Rev. A
10
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
APPLICATION INFORMATION
Single wire Dimming Application
full on. The pulse low state duration (between the
falling and rising edges) must be shorter than
0.5msec. Any consecutives pulses reduce the LED
current by 1mA. The enable signal is kept low for
more than 1.5msec to turn off all the LED channels
and set the driver in shutdown mode, as shown on
Figures 4.
The dimming control can be achieved through a single
wire interface by connecting together all three logic
input signals EN, E¯N¯M¯ and E¯N¯¯S as shown on Figure 3.
The common enable signal is set high to enable the
driver. On the first negative going pulse, the LEDs turn
Figure 3. Single Wire Dimming Control
Figure 4. Single Enable Timing Diagram
© 2006 Catalyst Semiconductor, Inc.
11
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
CAT3616
PACKAGE DRAWING AND DIMENSIONS
Thin QFN 16-Lead 4mm x 4mm
D2
C
PIN 1 ID
D
E2
b
L
A1
e
E
3xe
A
SYMBOL
MIN
0.70
0.00
0.25
NOM
0.75
MAX
0.80
0.05
0.35
A
A1
b
0.02
0.30
C
0.20 REF
4.00
D
3.95
2.15
4.05
2.25
D2
e
2.20
0.65 BSC
4.00
E
3.95
2.15
0.50
4.05
2.25
0.60
E2
L
2.20
0.55
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC specification MO-229.
For current Tape and Reel information, download the PDF file from:
http://www.catsemi.com/documents/TapeandReel.pdf
Doc. No. 5018 Rev. A
12
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT3616
EXAMPLE OF ORDERING INFORMATION
Prefix
Device #
3616
Suffix
CAT
HV4
–
T2
Package
Company ID
Product Number
T: Tape & Reel
2: 2000/Reel
HV4: TQFN
3616
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The standard lead finish is Matte-Tin.
(3) The device used in the above example is a CAT3616HV4-T2 (TQFN, Tape & Reel).
(4) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office.
© 2006 Catalyst Semiconductor, Inc.
13
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
REVISION HISTORY
Date
Rev.
Reason
07/20/2006
A
Initial Issue
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RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal
injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled
"Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical
semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
2975 Stender Way
Santa Clara, CA 95054
Phone: 408.542.1000
Document No: 5018
Fax:
408.542.1200
Revision:
A
www.catsemi.com
Issue date:
07/20/2006
相关型号：
CAT3626HV4-GT2
LED DISPLAY DRIVER, QCC16, 4 X 4 MM, 0.80 MM HEIGHT, HALOGEN AND ROHS COMPLIANT, MO-220, TQFN-16
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