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G5114 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc

Part No. G5114
Description  High Efficiency, Constant Current Output for 8 Series LEDs Driver
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Maker  GMT [Global Mixed-mode Technology Inc]
Homepage  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G5114 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc

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Ver: 1.1
Sep 13, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G5114/G5116/G5118
Global Mixed-mode Technology Inc.
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 0.8
Ω 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
ORDER NUMBER
(Pb free)
MARKING
TEMP.
RANGE
PACKAGE
G5114T1U
G5114T1Uf
5114X
-40°C ~ +85°C
SOT-23-5
G5116T1U
G5116T1Uf
5116X
-40°C ~ +85°C
SOT-23-5
G5118P8U
G5118P8Uf
G5118
-40°C ~ +85°C
MSOP-8
Pin Configuration
Typical Application Circuit
VCC
OVP
SOT-23-5
G5114
5
4
1
SW
2
3
GND
FB
VCC
SHDN
SOT-23-5
G5116
5
4
1
SW
2
3
GND
FB
SW
MSOP-8L
G5118
8
6
1
VCC
2
3
PGND
N.C.
7 AGND
SHDN
5
4
OVP
FB
V
IN
SW
SHDN
FB
GND
G5118
C2
1µF/ 35V
L1
V
IN
2.7V to 4.2V
V
OUT
D1
OVP
C1
8 LEDs
PWM Dimming
Waveform
RS
4.7µF/ 6.3V
VCC
OVP
SOT-23-5
G5114
5
4
1
SW
2
3
GND
FB
VCC
SHDN
SOT-23-5
G5116
5
4
1
SW
2
3
GND
FB
SW
MSOP-8L
G5118
8
6
1
VCC
2
3
PGND
N.C.
7 AGND
SHDN
5
4
OVP
FB
V
IN
SW
SHDN
FB
GND
G5118
C2
1µF/ 35V
L1
V
IN
2.7V to 4.2V
V
OUT
D1
OVP
C1
8 LEDs
PWM Dimming
Waveform
RS
4.7µF/ 6.3V


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