PAM2811 Datasheet, PDF (1/12 Pages) Power Analog Micoelectronics – 4-Channel Single-Wire Dimming LED Drive with Ultra Low Dropout Current Sink

PAM2811
4-Channel Single-Wire Dimming LED Drive with
Ultra Low Dropout Current Sink
Features
n Support up to 4 LEDs
n LED sink current 20mA
n Low Dropout Voltage
n Low Quiescent Supply Current:270uA(typ)
n No Noise and EMI
n Shutdown Current Less than 1uA
n Over Temperature Protection
n 16-Step Brightness Control
n Small Package: QFN3x3-16L,MSOP-8L
SOT23-8L, DFN2X2-8L
n Pb-free Package
Description
The PAM2811 provides 4 regulated current sinks,
capable of sinking up to 20mA current to
accommodate 4 white LEDs. It requires no charge
pump, has no noise and EMI, and significantly
improves the efficiency in Li battery range.
LED brightness can be controlled by Single-wire
dimming techniques. The constant current sink is
set by16-step.
The PAM2811 is available in QFN3x3-16L,MSOP-
8L,SOT23-8L and DFN2X2-8L Packages.
Applications
n Mobile phone
n Digital camera
n PDA Mp3
Typical Application
VIN
1uF
Pulse Input
ss
12
n≤16
GND _PAM2811
PGND
EN
LED 1
LED 2
LED 3
LED 4
Power Analog Microelectronics,Inc
www.poweranalog.com
1
03/2010 Rev1.0