G5115 Datasheet, PDF (1/9 Pages) Global Mixed-mode Technology Inc – High Efficiency, Constant Current Output for 4 Series LEDs Driver

Global Mixed-mode Technology Inc. G5115/G5117/G5119
High Efficiency, Constant Current Output for 4 Se-
ries LEDs Driver
Features
„ Driving Up to 4 LEDs
„ Auto Trigger/Release OVP Function
(G5115/G5119)
„ Input Voltage Range: 1.7V ~ 6.5V
„ Precise Dimming Control Using PWM Signal
„ 50µA No Switching Current
„ Internal 18V Switch With 0.8Ω Rds(on)
„ Soft Start Function Included
„ Up to 85% Efficiency
Applications
„ White LED Backlight Display for PDA
„ Pocket PC
„ Smart Phones
„ Handheld Devices
„ Cellular Phones
General Description
The G5115/G5117/G5119 are high efficiency boost
converters with constant current output that drives up to
4 white LEDs. The continuous LED current is set with
the FB pin regulated voltage across an external sense
resistor (Rs) connected from that pin to ground. A dim-
ming PWM waveform to SHDN pin controls LED av-
erage current proportional to its duty makes the bright-
ness of LEDs also proportional to the duty.
Low FB regulation voltage and low switch turned on
resistance result in high converting efficiency from wide
battery voltage range to high LED series voltage.
An over-voltage protection prevents device damage
while LEDs is open. It is easy to release protection
state by just put the load path closed.
Ordering Information
ORDER NUMBER
G5115T1U
G5117T1U
G5119P8U
Note:T1 : SOT-23-5
U : Tape & Reel
ORDER NUMBER
(Pb free)
G5115T1Uf
G5117T1Uf
G5119P8Uf
P8 : MSOP-8L
MARKING
5115X
5117X
G5119
TEMP. RANGE
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
PACKAGE
SOT-23-5
SOT-23-5
MSOP-8L
Pin Configuration
Typical Application Circuit
SW 1
5 VCC
GND 2 G5115
FB 3
4 OVP
SOT-23-5
SW 1
5 VCC
GND 2 G5117
FB 3
4 SHDN
SOT-23-5
VCC 1
PGND 2
N.C. 3
G5119
OVP 4
MSOP-8
Ver: 1.1
Sep 20, 2004
8 SW
7 AGND
6 FB
5 SHDN
V_IN
2.7V to 4.2V
4.7µF/ 6.3V
PWM Dimming
Waveform
L1
D1
V_IN
SW
C1
OVP
G5119
SHDN
FB
GND
C2
1µF/ 25V
V_OUT
4 LEDs
RS
TEL: [phone]
http://www.gmt.com.tw
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