SGM3132 Datasheet, PDF (1/11 Pages) SG Micro Corp – Ultra Low Dropout Current Source

SGM3132
4-Channel 1-Wire Dimming LED Driver
with Ultra Low Dropout Current Source
GENERAL DESCRIPTION
FEATURES
The SGM3132 is a 4-channel ultra low dropout
constant source parallel LED driver. The SGM3132
uses an internal resistor to set the bias current for four
LEDs.
The SGM3132 incorporates a single wire interface to
program the output current at 16 continuous steps. It
has an internal deglitch circuit for filtering the noise of
the EN input.
The SGM3132 requires only a 35mV dropout voltage at
a 20mA load. The feature makes SGM3132 ideal for
battery-operated systems, such as personal digital
assistants.
● Ultra Low Dropout: 35mV/20mA
● Support up to 4 LEDs
● LED Sink Current 20mA
● ±3% LED Current Matching
● Deglitch Circuit
● Thermal Shutdown Protection
● 16-Step Brightness Control
● No EMI and Switch Noise
● Operating Temperature Range: -40℃ to +85℃
● Available in Green TQFN-3×3-16L, TDFN-2×2-8L
and MSOP-8 Packages
TYPICAL APPLICATION
The SGM3132 is available in Green TQFN-3×3-16L,
TDFN-2×2-8L and MSOP-8 packages and is specified
over an ambient temperature range of -40℃ to +85℃.
APPLICATIONS
Wireless Handsets
MP3, MP4, and PMP
Cellular Phones
Portable Communication Devices
Digital Cameras, Camcorders
PDAs, Palmtops, and Handy Terminals
Battery-Powered Equipment
2.5V to 5.0V
1µF
VIN
PGND
Pulse Inpput
12
n=16
SGM3132
LED1
EN
LED2
LED3
AGND ^LED4
SG Micro Corp
www.sg-micro.com
REV. A. 2