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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

50碌A(chǔ) No Switching Current

Internal 30V Switch With 0.8鈩?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擄C ~ +85擄C

-40擄C ~ +85擄C

-40擄C ~ +85擄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

1碌F/ 35V

8 LEDs

SW 1

GND 2

FB 3

SOT-23-5

5 VCC

4.7碌F/ 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

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