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
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.
Applications
White LED Backlight Display for PDA
Pocket PC
Smart Phones
Handheld Devices
Cellular Phones
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
FB 3
G5114
4 OVP
SOT-23-5
V
IN
2.7V to 4.2V
V
IN
L1
D1
V
OUT
SW
OVP
C2
1µF/ 35V
8 LEDs
SW 1
GND 2
FB 3
SOT-23-5
5 VCC
4.7µF/ 6.3V
C1
G5116
PWM Dimming
Waveform
G5118
SHDN
GND
FB
R
S
4 SHDN
VCC 1
PGND 2
8 SW
7 AGND
G5118
N.C. 3
OVP 4
MSOP-8L
6 FB
5 SHDN
Ver: 1.1
Sep 13, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
