SP6683ER-L [EXAR]

1X/1.5X High Efficiency Charge Pump;
SP6683ER-L
型号: SP6683ER-L
厂家: EXAR CORPORATION    EXAR CORPORATION
描述:

1X/1.5X High Efficiency Charge Pump

文件: 总14页 (文件大小:260K)
中文:  中文翻译
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SP6683  
1X/1.5X High Efficiency Charge Pump  
LED Driver for Flash or Backlight  
FEATURES  
VOUT  
1
10  
C2P  
Output Current up to 200mA  
Ideal for White LED driver in CellPhone Flash  
0.5µA Shutdown Current  
C1P  
VIN  
9
2
3
4
5
C1N  
SP6683  
8
7
6
GND  
1x/1.5x Mode Charge Pump  
10 Pin DFN  
+2.7V to +5.5V Input Voltage Range  
Built-in 1.2MHz Oscillator  
VMODE  
FB  
C2N  
EN/PWM  
0.5mA Quiescent Current  
Over Temperature Protection  
Now Available in Lead Free Packaging  
Shorted LED Protection  
Programmable Output Current or Voltage  
PWM Dimming Control via Enable Pin  
Soft Start to limit In-Rush Current  
Space Saving 10-pin 3 x 3mm DFN Package  
Three Options for Optimizing Efficiency:  
SP6683 - MOSFET discharge in shutdown  
SP6683-03 - High Impedance in shutdown  
SP6683-LV - Low Voltage (150mV)VFB Reference  
APPLICATIONS  
Mobile Phone  
Camera Flash Driver  
PDA  
Digital Still Camera  
Digital Camcorder  
Color LCD Module  
DESCRIPTION  
The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion  
battery input for driving up to 8 white LED’s used in backlighting color displays. The SP6683  
operates with an internal 1.2MHz clock, enabling the use of small external components.  
Output current can be accurately regulated by modulating the switcher between the charge  
pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground  
and draws less than 500nA current. Offered in 10-pin DFN package, the SP6683 family  
includes three options that allow the user to optimize LED driving circuit; SP6683-LV with low  
voltage reference, SP6683-03 with high impedance output in shutdown, and SP6683 with  
pulled down output in shutdown.  
TYPICAL APPLICATION SCHEMATIC  
C2  
1uF  
6.3V/0603  
1 Vout  
2 C1P  
10  
9
C2P  
C1N  
C3  
1uF  
6.3V/0603  
SP6683  
Io=Vfb/Rb  
LED1  
GND  
3
4
Vin  
8
7
C4  
2.2uF  
6.3V/0603  
Vin  
2.7V~4.2V  
Vmode  
C2N  
C1  
2.2uF  
6.3V/0603  
5
6
EN/PWM  
FB  
EN/PWM  
Rb  
1.5 ohm  
1% / 0603  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
1
ABSOLUTE MAXIMUM RATINGS  
VIN, VMODE, VOUT and EN/PWM................. -0.3V to 6V  
Output Current (IOUT) ...................................... 300mA  
Power Dissipation per Package - 10-pin DFN  
These are stress ratings only and functional operation of  
the device at these ratings or any other above those  
indicated in the operation sections of the specifications  
below is not implied. Exposure to absolute maximum  
rating conditions for extended periods of time may affect  
reliability.  
(derate 8.84mW/°C above +70°C) ..................... 1.2W  
Junction Temperature .................................... +125°C  
Storage Temperature ...................... -65°C to +150°C  
ESD Rating. ................................................ 2kV HBM  
ELECTRICAL CHARACTERISTICS  
Unless otherwise specified: VIN = 3.6V, C1 = C4 = 2.2µF & C2 = C3 = 1µF (Ceramic, ESR=0.03) and TAMB =25°.  
The denotes specifications which apply over full operating temperature range -40ºC to +85ºC.  
Parameter  
Min. Typ. Max. Units  
Conditions  
Input Voltage  
2.7  
5.5  
V
V
IN = 3.0 - 5.5V, VOUT = 3.6V,  
Quiescent Current  
0.5  
0.5  
3
mA  
µA  
Iout = 100µA  
Shutdown Current  
1.5  
V
V
V
EN/PWM = 0.0V, VIN = 5.5V  
IN = 4.2V, Vout = 3.6V  
IN = 2.7 - 5.5V  
Maximum Load Current  
Oscillator Frequency  
VFB Reference Voltage  
200  
1.2  
mA  
0.7  
1.5  
MHz  
IOUT = 20mA, VOUT = 3.6V,  
0.283  
0.315  
0.347  
V
1.5X Mode  
8
3
13  
6
1.5X Mode, 100mA Load  
1.0X Mode, 100mA Load  
Output Resistance  
VMODE Threshold Voltage  
VMODE Hysteresis  
1.00  
1.6  
1.25  
1.50  
V
V
IN Falling  
60  
150  
mV  
VIN = 3.6V  
VMODE Pin Current  
0.01  
0.5  
0.4  
µA  
V
MODE = 1.25 V  
EN/PWM Logic Low  
EN/PWM Logic High  
EN/PWM Pin Current  
FB Pin Current  
V
V
0.01  
0.01  
0.5  
0.5  
µA  
µA  
V
V
V
EN/PWM = 4.2V  
FB = 1V  
= 4V, IOUT = 100mA ,1.5x  
MOoUdTe  
VOUT Ripple  
80  
mV  
µs  
FB within 90% regulation  
1.5X Mode, VOUT = 3.6, IOUT  
100µA  
VOUT Turn-On Time  
250  
500  
=
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
2
PIN DESCRIPTION  
PIN NUMBER  
PIN NAME  
VOUT  
DESCRIPTION  
1
2
3
4
Regulated charge pump output.  
C1P  
Positive terminal to the charge pump flying capacitor C2.  
Input supply voltage.  
VIN  
VMODE  
Charge pump mode program pin. When VMODE is greater than 1.25V,  
a X1 charge pump is used. Otherwise, charge pump switches to X1.5  
mode. A voltage divider shown in the typical application circuit  
programs the VIN threshold for charge pump mode switching.  
5
6
FB  
This is the feedback pin for output current or voltage regulation. The  
voltage of this pin is compared with an internal 315mV reference.  
EN/PWM  
Enable and PWM dimming control input. Pull this pin low to discon-  
nect VOUT from VIN and shutdown the SP6683.VOUT is pulled to  
ground in shutdown.  
7
8
C2N  
GND  
C1N  
C2P  
Negative terminal to the charge pump flying capacitor, C4.  
Ground reference.  
9
Negative terminal to the charge pump flying capacitor, C2.  
Positive terminal to the charge pump flying capacitor C4.  
10  
FUNCTIONAL DIAGRAM  
V
IN  
C1P  
1.2 MHz  
Clock  
Manager  
Voltage  
Reference  
EN/PWM  
Start-up  
and  
Charge  
Pump  
C1N  
C2P  
1.25V  
Switches  
MODE  
COMP  
Mode Control  
V
MODE  
C2N  
V
OUT  
315mV  
V
OUT  
COMP  
FB  
GND  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
3
TYPICAL PERFORMANCE CHARACTERISTICS (25ºC)  
Iout vs. Vin @ 60mA  
Iout vs. Vin @ 100mA  
200  
150  
100  
50  
200  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 4.2V  
150  
100  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 4.2V  
50  
0
0
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
Iout vs. Vin @ 200mA  
Iout vs. Vin @ 300mA  
300  
250  
200  
150  
100  
50  
400  
350  
300  
250  
200  
150  
100  
50  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
0
0
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
4
TYPICAL PERFORMANCE CHARACTERISTICS (25ºC)  
Efficiency vs Vin (Iout = 60mA)  
Efficiency vs Vin (Iout = 100mA)  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
100  
90  
80  
70  
60  
50  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 4.2V  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 4.2V  
40  
30  
20  
10  
0
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
Efficiency vs Vin (Iout = 300mA)  
Efficiency vs Vin (Iout = 200mA)  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
Vf = 3.9V  
Vf = 3.0V  
Vf = 3.3V  
Vf = 3.6V  
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
3.0  
3.5  
4.0  
Vin (V)  
4.5  
5.0  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
5
THEORY OF OPERATION  
General Overview  
The SP6683 is a current regulated charge pump  
ideal for converting a Li-Ion battery input for  
driving white LEDs used in camera flash or  
backlighting color displays in cellular phones,  
PDAs, digital cameras and MP3 players. The  
SP6683 is able to efficiently drive one 200mA  
Flash LED or up to eight 20mA white LEDs in  
parallel and maintain a constant brightness over  
a very wide operating voltage range (2.7V to  
5.5V). The SP6683 operates with an internal  
1.2MHz clock, enabling the use of small exter-  
nal components. Other features of SP6683 in-  
clude PWM dimming control as well as com-  
plete input/output disconnect in shutdown. In  
shutdown mode the IC typically draws 500nA  
current. The output regulation is achieved by  
sensing the voltage at the feedback pin and  
modulatingtheswitchbetweenthechargepump  
and output capacitor.  
1) Voltage Reference. This block provides the  
315mV and 1.25V reference voltages needed  
for the two comparators.  
2) Mode Control. An external voltage divider  
connected to the VMODE pin will define an input  
voltage to the mode comparator which sets the  
logic state of the mode selection outputs to the  
X1 or X1.5 modes. VMODE is compared to a  
1.25V bandgap voltage. For example, if one  
makes a 158K/100K divider, the mode will  
change at 2.58 x 1.25 V = 3.23V. A comparator-  
based cycle by cycle regulation ensures that no  
mode change occurs during cycles.  
3) Clock Manager. An internal 1.2MHz clock  
is generated in this block. Depending on the  
mode control, the appropriate clock phasing is  
generatedhereandsenttothestartupandcharge  
pump switches block.  
4) VOUT Comparator & Output Control. A  
315mV reference voltage is compared to feed-  
back voltage to control the VOUT needed for the  
application. Output current is set by a bias  
resistor from the FB pin to the GND pin chosen  
by the relationship:  
Theory of Operation  
The SP6683 regulated charge pump block dia-  
gram consists of four main blocks (Voltage  
Reference,ModeControl,ClockManager,Start-  
up and Charge-Pump Switches) and two com-  
parators (VMODE Comparator and VOUT Com-  
parator).  
VFB  
RFB  
IOUT  
=
where VFB = 315mV.  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
6
APPLICATION INFORMATION  
Configuring as Camera Flash + Torch Driver  
Configuring as Cellphone Camera  
Flash Driver  
The SP6683 can be configured as a flash/  
torchLEDdriverwhichinsomeapplications  
require constant torch current used for mo-  
tion pictures (i.e. movie mode).  
SP6683iscapableofdeliveringupto200mA  
current, which is perfect to drive the most  
common LEDs in today's market. It is  
designed to work in the cell phone camera  
flash which powers up directly from the  
Lithium-Ion battery.  
D1  
White  
LED  
C5  
C2  
®
2.2µF  
1
2
3
4
5
10  
9
V
C2P  
C1N  
GND  
C2N  
1µF  
OUT  
SP6683  
C1P  
C4  
1µF  
8
V
IN  
R
B2  
7
V
C2  
1uF  
MODE  
3.0 - 4.2V  
6
C1  
2.2µF  
FB  
EN/PWM  
6.3V/0603  
1
2
Vout  
C1P  
10  
9
C2P  
C1N  
Lithium  
Ion  
R1  
1M  
R2  
1M  
C3  
1uF  
RB1  
6.3V/0603  
SP6683  
Io=Vfb/Rb  
LED1  
GND  
3
4
Vin  
8
7
ENABLE  
C4  
2.2uF  
Vin  
2.7V~4.2V  
Vmode  
C2N  
6.3V/0603  
FLASH  
C1  
2.2uF  
6.3V/0603  
Camera Flash/Torch Application  
5
6
EN/PWM  
FB  
EN/PWM  
Flash Mode  
Torch Mode  
400  
350  
300  
250  
200  
150  
100  
Rb  
1.5 ohm  
1% / 0603  
Camera Flash Application  
Torch Mode: Vf=3.2V , Enable = High, FLASH = Low.  
Flash Mode: Vf=3.3V, Enable = High, FLASH = High.  
50  
0
Configuring as LCD Backlight  
3.2  
3.4  
3.6  
3.8  
4.0  
4.2  
The SP6683 is able to efficiently drive up to  
eight 20mA white LEDs in parallel and  
maintain a constant brightness over a very  
wide operating voltage range (2.7V to 5.5V)  
Vin (V)  
IOUT vs. VIN  
ProgrammingX1orX1.5OperatingMode  
For simplest application circuitry, SP6683's  
mode can be fixed by connecting VMODE to VIN  
for X1 mode or connecting VMODE to GND for  
X1.5 mode. The SP6683 can automatically  
change from X1 mode to X1.5 to maximize  
efficiency. To use this feature, divider resistors  
should be chosen according to the specific ap-  
plication, as shown below.  
C5  
®
C2  
1µF  
C2P 10  
1
V
OUT  
SP6683  
1µF  
C1N 9  
GND 8  
2
3
4
5
C4  
C1P  
White  
LED  
1µF  
V
IN  
2.7 -  
4.2V  
C2N 7  
V
MODE  
C1  
Lithium  
-Ion  
3
VIN  
EN/PWM 6  
VIN  
FB  
R1  
R2  
1µF  
SP6683  
VMODE  
4
R6  
20  
20  
C2  
GND  
8
ENABLE  
LCD Backlight Application  
Programming the Vmode Resistors  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
7
APPLICATION INFORMATION  
Configuring the SP6683 as Voltage or  
Current Source  
Anode  
The white LED load configuration used by  
customerscanbediscretewhiteLEDsorawhite  
LED module. Inside the white LED module,  
there may or may not be resistors in series with  
the white LEDs. According to the different  
application requirements, the SP6683 can be  
configuredaseitheravoltagesourceoracurrent  
source to provide solutions for these different  
applications, as shown below. The figure shows  
the SP6683 driving discrete white LEDs as a  
current source.  
FB  
3-wire W-LED module  
GND  
3-wire white LED module  
Anode  
VOUT  
VOUT  
1
1
5
SP6683  
5
FB  
SP6683  
2-wire W-LED module  
Cathode  
Rb  
Rb  
2.2uF  
GND  
VFB  
8
GND  
Rb  
8
Driving discrete white LEDs as current source  
The current in one white LED current is set by  
the ratio of the feedback pin voltage (315mV)  
and the bias resistor RB. To set the operating  
current, RB can be selected by:  
Driving 2-wire white LED module as current source  
In the figure above, the SP6683 was used to  
drive a 2-wire white LED module (without  
internal series resistors) as a current source. The  
bias resistor RB is selected to regulate the total  
current of the white LED module instead of the  
current of a single LED as in the figure showing  
the 3 wire white LED module.  
VFB  
RB =  
ILED  
The current of the remaining white LEDs is set  
according to the similarity of the white LEDs.  
3-wire white LED modules with internal series  
resistors (as shown in figure below) can also be  
driven in this way.  
VOUT  
Anode  
1
R5  
R6  
SP6683  
2.2uF  
VFB  
5
GND  
8
2-wire W-LED  
module  
Cathode  
Driving 2-wire white LED module as voltage source  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
8
APPLICATION INFORMATION  
The SP6683-03ER has the discharge MOSFET  
disabled ensuring that the output node is at high  
impedance during shutdown. This can be useful  
if the system is feeding LED current from an-  
other source while the SP6683 is in shutdown.  
In this application, the bias resistor can be se-  
lected by:  
VFB  
RB =  
ILED (TOTAL)  
where ILED(TOTAL) is the total operating current  
of all the white LEDs.  
The SP6683-LV offers a lower reference volt-  
age that allows to reduce efficiency loss occur-  
ring in the current sense resistor. This part is  
ideal for driving single LEDs for Flash applica-  
tions.  
To use SP6683 as a voltage source for fixed  
voltage applications, a voltage divider is need to  
program the output voltage, as shown in the figure  
above. The output voltage is set by the ratio of  
the two resistors and the feedback control volt-  
age as shown by:  
Reducing Component Count  
It is possible to reduce the number of external  
components by shorting pins 2 & 9 and omitting  
the flying capacitor. In this mode, the charge  
pump operates in a "quasi" doubler mode. This  
reduces efficiency but does allow for one less  
externalcapacitor. Thiscircuitisrecommended  
only when Input and Output Voltages have  
similar range, which is very common when  
driving white LEDs from a Li-Io battery.  
V
OUT = ( 1 + R5 ) • VFB  
R6  
Brightness Control Using PWM  
Dimming control can be achieved by applying a  
PWM control signal to the EN/PWM pin. The  
brightness of the white LEDs is controlled by  
increasing and decreasing the duty cycle of the  
PWM signal. While operating frequency range  
isfrom60Hzto700Hz, therecommendedmaxi-  
mum brightness frequency range is from 60Hz  
to 200Hz. A repetition rate of at least 60Hz is  
required to prevent flicker.  
1
2
Vout  
C1P  
10  
9
C2P  
C1N  
C3  
1uF  
6.3V/0603  
SP6683  
Io=Vfb/Rb  
LED1  
GND  
3
4
Vin  
8
7
C4  
2.2uF  
6.3V/0603  
Vin  
2.7V~4.2V  
Vmode  
C2N  
C1  
2.2uF  
6.3V/0603  
5
6
EN/PWM  
FB  
EN/PWM  
Rb  
1.5  
1% / 0603  
Three Options for Optimization  
Flying Cap Removed  
The SP6683 family includes three options that  
allow the user to optimize the LED driving  
circuit. The SP6683 includes an on-board dis-  
charge switch that ensures that VOUT is com-  
pletely discharged in shutdown. This feature is  
very useful in systems using PWM dimming,  
when the SP6683 is periodically turned on and  
off. The discharge switch ensures that the fall-  
ing and rising edges of the LED current have  
similar durations.  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
9
APPLICATION INFORMATION  
Component Selection  
Theguidelineforselectingdividerresistorsisas  
follows. Forhighinputvoltage, theSP6683will  
work in X1 mode. When the input voltage drops  
to VTH threshold voltage, it will switch to X1.5  
mode automatically. The VTH threshold voltage  
for mode change can be calculated by:  
Ceramic capacitors are recommended for their  
inherently low ESR, which will help produce  
low peak-to-peak output ripple, and reduce high  
frequency spikes.  
The fly capacitor controls the strength of the  
charge pump. Selection of the fly capacitor is a  
tradeoff between the output voltage ripple and  
the output current capability. Decreasing the fly  
capacitor will reduce the output voltage ripple  
because less charge will be delivered to the  
output capacitor. However, a smaller fly capaci-  
tor leads to larger output resistance, thus de-  
creasing the output current capability and the  
efficiency of the circuit. Increasing the value of  
the input and output capacitors could further  
reduce the input and output ripple. For back-  
lightingapplicationsupto80mAoutputcurrent,  
CIN = COUT = 1µF is typically used. For appli-  
cationswithmorethan80mAoutputcurrent, for  
example in Flash applications where Iout can be  
as much as 200mA, CIN = COUT = 2.2µF is  
recommended. For peak performance, place all  
capacitors as close to the SP6683 as possible.  
V
TH = (VF + 0.315 + m • ILED • ROUT)  
Where VF and m are the forward voltage and  
number of the white LEDs, Rout is the output  
resistance of the SP6683.  
The equation for the voltage divider R1 and R2  
with VMODE = 1.25V is:  
VTH = 1.25V • (1+R1/R2)  
Which can be expressed as R1:  
R1 = [(VTH/1.25) - 1] R2  
For the typical SP6683 application, using VF =  
3.6V, m = 8, ILED =15mA, ROUT = 6, VTH will  
be 4.63V, Select R2 = 100k, then R1 = 270kΩ  
Refer to table 1 below for some suggested low  
ESR capacitors.  
SUGGESTED LOW ESR CAPACITORS  
Manufacturers/ Website  
Part Number  
Capacitance/  
Voltage  
1uF/6.3V  
2.2uF/6.3V  
1uF/6.3V  
Capacitor  
Size/Type/Thickness  
0402/X5R/0.5mm  
0603/X5R/0.9mm  
0402/X5R/0.55mm  
0603/X5R/0.9mm  
ESR at  
100KHz  
0.03  
0.02  
0.03  
0.02  
TDK/www.tdk.com  
TDK/www.tdk.com  
Murata/www.murata.com  
Murata/www.murata.com  
C1005X5R0J105M  
C1608X5R0J225K  
GRM155R60J105KE19B  
GRM188R61A225KE34B  
2.2uF/6.3V  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
10  
APPLICATION INFORMATION  
Brightness Matching  
For white LEDs, the forward voltage drop is a  
function of the operating current. However, for  
a given current, the forward voltage drop across  
each LED does not always match exactly. This  
can cause uneven brightness in the white LEDs.  
used. This could be done by using a larger  
resistor, as shown in the figure below. Rb2 is  
used to bias the operating current of the white  
LED, Rb1 is use to increase the output voltage.  
Better brightness matching was achieved at the  
cost of the power wasted on the bias resistor.  
In the figure below, assuming high-precision  
bias resistors were used, the operating current  
ratio of two different branches can be easily  
derived as shown by:  
Power Efficiency  
The efficiency of driving the white LEDs can be  
calculated by  
I1  
I2  
VOUT - VF1  
VOUT - VF2  
=
VF • IF  
Vi • Ii  
VF • IF  
VF  
η
=
=
where I1 & I2 are the operating current of the  
white LEDs, where VF1 &VF2 are the forward  
voltage of the white LEDs.  
Vi • (n • IF + IQ)  
Vi • n  
Where  
Vi & Ii are input voltage and current;  
VF & IF are the forward voltage and operating  
current of the White LED;  
SincethebrightnessofthewhiteLEDispropor-  
tional to the operating current, for better bright-  
ness matching, a higher output voltage could be  
IQ is quiescent current, which is considered  
small compared with IF.  
VOUT  
I1  
I2  
In  
1
5
D1  
VF1  
D2  
Dn  
VFn  
VF2  
SP6683  
Rb1  
Rb  
Rb  
VFB  
Rb2  
GND  
8
Rb  
Improving brightness matching  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
11  
APPLICATION INFORMATION  
C2  
1uF  
SP6683  
1
2
3
4
5
10  
9
Vout  
C2P  
C1N  
D1  
LumiLED  
C4  
C5  
2.2uF  
Vin: 3.0 - 4.2V  
C1P  
Vin  
8
1uF  
GND  
7
R1  
Vmode  
FB  
C2N  
6
C1  
205K  
EN/PWM  
2.2uF  
R2  
100K  
R3  
Rb  
1.5Ohm, 0603  
R1 = (Vthres/1.25 - 1)*R2  
R1 = 174K for 100mA Vthres = 3.4V  
R1 = 205K for 200mA Vthres = 3.8V  
1.0M  
FLASH  
200mA  
SHDN  
SP6683 Li-Ion Input in 1x to 1.5X mode to LumiLED PWF1  
Efficiency: 1X-1.5X Cin = Cout = 2.2uF  
100.0  
90.0  
80.0  
70.0  
60.0  
50.0  
40.0  
30.0  
20.0  
10.0  
0.0  
Iout = 200mA  
3.2  
3.4  
3.6  
3.8  
4.0  
4.2  
Vin (V)  
Output Current: 1X-1.5X Cin = Cout = 2.2uF  
400  
350  
300  
250  
200  
150  
100  
50  
Iout = 200mA  
0
3.2  
3.4  
3.6  
3.8  
4.0  
4.2  
Vin (V)  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
12  
PACKAGE: 10 PIN DFN  
D
D/2  
ø
E/2  
A
(A3)  
E
A1  
Seating Plane  
SIDE VIEW  
Pin1 Designator  
to be within this  
INDEX AREA  
(D/2 x E/2)  
TOP VIEW  
D2  
D2/2  
4
1
2
3
5
INDEX AREA  
(D/2 x E/2)  
E2/2  
E2  
K
L
10  
9
8
7
6
e
b
BOTTOM VIEW  
JEDEC MO-229  
3x3 10 Pin DFN  
VARIATION VEED-5  
Dimensions in Inches  
Conversion Factor:  
1 Inch = 25.40 mm  
Dimensions in Millimeters:  
Controlling Dimension  
SYMBOL  
MIN  
0.80  
0.00  
NOM  
0.90  
0.02  
0.20 REF  
MAX  
1.00  
0.05  
MIN  
0.032  
0.000  
NOM  
0.036  
0.001  
0.008 REF  
MAX  
0.039  
0.002  
A
A1  
A3  
K
0.20  
0º  
0.18  
-
-
0.008  
0º  
0.008  
-
-
-
ø
-
0.25  
14º  
0.30  
14º  
0.012  
b
0.010  
D
D2  
E
E2  
e
L
3.00 BSC  
-
3.00 BSC  
-
0.50 BSC  
0.40  
0.119 BSC  
-
0.119 BSC  
-
0.020 BSC  
0.016  
2.20  
1.40  
0.30  
2.70  
1.75  
0.50  
0.087  
0.056  
0.012  
0.106  
0.069  
0.020  
SIPEX Pkg Signoff Date/Rev:  
JL Aug09-05 / RevA  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
13  
ORDERING INFORMATION  
Operating Temperature Range Package Type  
Part Number  
SP6683ER .................................................. -40°C to +85°C ........................................................... 10 Pin DFN  
SP6683ER/TR ............................................ -40°C to +85°C ........................................................... 10 Pin DFN  
SP6683-03ER ............................................. -40°C to +85°C ........................................................... 10 Pin DFN  
SP6683-03ER/TR .........................................-40°C to +85° ..................................................... .......10 Pin DFN  
SP6683ER-L ............................................... -40°C to +85°C .................................(Lead Free).......10 Pin DFN  
SP6683ER-L/TR ......................................... -40°C to +85°C .................................(Lead Free).......10 Pin DFN  
SP6683-03ER-L ......................................... -40°C to +85°C .................................(Lead Free).......10 Pin DFN  
SP6683-03ER-L/TR ................................... -40°C to +85°C .................................(Lead Free).......10 Pin DFN  
*Contact factory for availability of the following parts  
SP6683LVER.............................................. -40°C to +85°C ........................................................... 10 Pin DFN  
SP6683LVER/TR........................................ -40°C to +85°C ........................................................... 10 Pin DFN  
/TR = Tape and Reel  
Pack quantity is 3000 for DFN.  
Sipex Corporation  
Headquarters and  
Sales Office  
233 South Hillview Drive  
Milpitas, CA 95035  
TEL: (408) 934-7500  
Solved By SipexTM  
FAX: (408) 935-7600  
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the  
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.  
Date: 3/31/06 RevG  
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight  
© Copyright 2006 Sipex Corporation  
14  

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