SP6687 Ver la hoja de datos (PDF) - Signal Processing Technologies
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SP6687 Datasheet PDF : 12 Pages
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SP6687
4 Channel Charge Pump White LED Driver
FEATURES
■ High Efficiency > 90%
■ Support up to 4 White LEDs with current
matching
■ Three Charge Pump Modes: X1, X1.5, X2
■ Soft Start Function
■ Short Circuit Protection
■ Output Overvoltage Protection
■ Thermal Shutdown
■ Programmable LED drive capability
■ PWM Dimming Control
■ 1MHz Fixed Frequency Oscillator
■ Low 1µA Shutdown Current
■ Pin Compatible with SC604
12 11 10 9
LED4 13
LED3 14
LED2 15
SP6687
16 Pin QFN
8 C1P
7 VIN
6 VOUT
LED1 16
5 ISET
1 23 4
Pin 1
Orientation
Now Available in Lead-Free Packaging
APPLICATIONS
■ Mobile phones
■ White LED Backlighting
■ Camera Flash LED lighting
DESCRIPTION
The SP6687 is a compact, highly efficient and highly integrated 4 channel charge pump white LED
driver. It can support from 1 to 4 White LEDs and is optimized for Li-Ion battery applications.
Current matching allows all 4 LEDs to maintain consistent brightness. Users can control White
LEDs by three programming bits. Each channel can support up to 30mA of current. This device
is available in a 4mm x 4mm, 16 pin QFN package.
TYPICAL APPLICATION CIRCUIT
Li-ion
Battery
CIN
1µF
RSET
C1 1µF
C2 1µF
8
7
C1P
VIN
1 EN
2 CTRL0
9
C1N
11
C2P
®
10
C2N
VOUT 6
SP6687
LED1 16
3 CTRL1
4 CTRL2
5 ISET
GND
12
LED2 15
14
LED3
LED4 13
COUT
1µF
Date: 11/15/05
Typical Application Circuit for 4-White LEDs
SP6687 4Channel Charge Pump White LED Driver
1
© Copyright 2005 Sipex Corporation
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