G5114 Datasheet, PDF (1/9 Pages) Global Mixed-mode Technology Inc – High Efficiency, Constant Current Output for 8 Series LEDs Driver

Global Mixed-mode Technology Inc. G5114/G5116/G5118
High Efficiency, Constant Current Output for 8 Se-
ries LEDs Driver
Features
„ Driving Up to 8 LEDs
„ Auto Trigger/Release OVP Function
(G5114/G5118)
„ Input Voltage Range: 1.7V ~ 6.5V
„ Precise Dimming Control Using PWM Signal
„ 50µA No Switching Current
„ Internal 30V 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 G5114/G5116/G5118 are high efficiency boost
converters with constant current output that drives up to
8 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
G5114T1U
G5116T1U
G5118P8U
ORDER NUMBER
(Pb free)
G5114T1Uf
G5116T1Uf
G5118P8Uf
MARKING
5114X
5116X
G5118
TEMP.
RANGE
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
PACKAGE
SOT-23-5
SOT-23-5
MSOP-8
Pin Configuration
Typical Application Circuit
SW 1
5 VCC
GND 2 G5114
FB 3
4 OVP
SOT-23-5
SW 1
5 VCC
GND 2 G5116
FB 3
4 SHDN
SOT-23-5
VCC 1
8 SW
PGND 2
N.C. 3
G5118
7 AGND
6 FB
OVP 4
5 SHDN
MSOP-8L
Ver: 1.1
Sep 13, 2004
V_IN
2.7V to 4.2V
4.7µF/ 6.3V
PWM Dimming
Waveform
L1
D1
V_IN
SW
C1
OVP
G5118
SHDN
FB
GND
C2
1µF/ 35V
V_OUT
8 LEDs
RS
TEL: [phone]
http://www.gmt.com.tw
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