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| GM19371 Datasheet, PDF (1/10 Pages) Gamma Microelectronics Inc. – BOOST WHITE LED DRIVER WITH OVP | |||
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GM19371
BOOST WHITE LED DRIVER
WITH OVP
Description
The GM19371 is a step up DC/DC convert
specifically designed to drive white LED;s with a
constant current. The device can drive up to 27
LEDs from a 5V supply.
Additional feature includes output voltage limiting
when LEDs are disconnected.
GM19371 is available in SOT-26 package.
Features
 Inherently matched LED current
 Drives up to 126LEDs (9S14P) from a
12V supply
 36V rugged bipolar switch
 Fast 1.2MHz switching frequency
 Over Voltage Protection, 30V
Application
Cellular phones
PDAs, Handheld Computers
Digital Cameras
Typical Application Circuits
MP3 Player
GPS Receivers
MR16 Lighting
VIN
6V to 18V
DIM
10µH
D1
C1
4.7µF
6
1
VIN
SW
OVP 5
GM19371
4 CTRL
GND
2
FB 3
14 Strings in Parallel
9 LED in Series
RSET 20mA x 14
Figure 1 GM19371 typical application
C2
4.7µF
www.gammamicro.com.tw 1
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