PAM2810 Datasheet, PDF (1/10 Pages) Power Analog Micoelectronics – 4-Channel Programmable LED Current Sink

PAM2810
4-Channel Programmable LED Current Sink
Features
n Cost Effective LED Driver
n Support up to 4 White LEDs
n Output Current up to 40mA per LED
n Low Dropout Voltage
n Ultra Low Quiescent Supply Current:
65μA (typ)
n No Noise and EMI
n Shutdown Current Less than 1μA
n Over Temperature Protection
n Small Packages : SOT23-8 and DFN
2mmx2mm
n Pb-free Package
Applications
n White LED for LCD Display Backlights
n White LED Keypad Backlights
n 1-Cell Li-Ion Battery-operated Equipment
Including PDAs, Hand-held PCs, Cellular
Phone
Description
The PAM2810 provides 4 regulated current sinks,
capable of sinking up to 40mA current to
accommodate 4 white LEDs. It requires no charge
pump, has no noise and EMI, and significantly
improves the efficiency in Li bettery range.
LED brightness can be controlled by PWM
techniques. The constant current sink is set with
an external sense resistor.
Alternatively, a PWM signal applied to the EN pin
can vary the anticipated brightness of the LED.
The device is in shut down mode when the EN
input is logic low.
The PAM2810 is available in SOT23-8 and DFN
2mmX2mm Packages.
Typical Application Circuit
VIN
C1
0.1μF
4
VIN
2
LED1 ⁸
EN
LED2 ⁷
PAM2810
1
LED3 ⁶
ISET
LED4 ⁵
GND
R1
3
6.2k
Power Analog Microelectronics,Inc
www.poweranalog.com
1
08/2008 Rev 1.1