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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

50碌A(chǔ) No Switching Current

Internal 18V Switch With 0.8鈩?Rds(on)

Soft Start Function Included

Up to 85% Efficiency

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.

Applications

White LED Backlight Display for PDA

Pocket PC

Smart Phones

Handheld Devices

Cellular Phones

Ordering Information

ORDER NUMBER

G5115T1U

G5117T1U

G5119P8U

Note:T1 : SOT-23-5

U : Tape & Ree

l

ORDER NUMBER

(Pb free)

G5115T1Uf

G5117T1Uf

G5119P8Uf

P8 : MSOP-8L

MARKING

5115X

5117X

G5119

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-8L

Pin Configuration

SW

1

5 VCC

Typical Application Circuit

GND 2

FB 3

G5115

4 OVP

SOT-23-5

V

IN

2.7V to 4.2V

L1

D1

V

OUT

V

IN

4.7碌F/ 6.3V

C1

SW

OVP

C2

1碌F/ 25V

4 LEDs

SW 1

GND 2

FB 3

SOT-23-5

VCC 1

PGND 2

5 VCC

G5117

4 SHDN

G5119

PWM Dimming

Waveform

SHDN

GND

FB

R

S

8 SW

7 AGND

G5119

N.C. 3

OVP 4

MSOP-8

6 FB

5 SHDN

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

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