PAM2811
4-Channel Single-Wire Dimming LED Drive with
Ultra Low Dropout Current Sink
Features
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Support up to 4 LEDs
LED sink current 20mA
Low Dropout Voltage
Low Quiescent Supply Current:270uA(typ)
No Noise and EMI
Shutdown Current Less than 1uA
Over Temperature Protection
16-Step Brightness Control
Small Package: QFN3x3-16L,MSOP-8L
SOT23-8L, DFN2X2-8L
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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
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Mobile phone
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Digital camera
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PDA Mp3
Typical Application
VIN
1uF
VI N
GND
PAM2811
LED1
LED2
PGND
Pulse Input
ss
1
2
n
≤
16
EN
LED3
LED4
Power Analog Microelectronics
,
Inc
www.poweranalog.com
03/2010 Rev1.0
1
PAM [ POWER ANALOG MICOELECTRONICS ]
