AT5160 datasheet(2/2 Pages) GMT

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Ver: 0.1

Jan 24, 2013

TEL: 886-3-5788833

http://www.gmt.com.tw

G2621

Global Mixed-mode Technology

High Efficiency, Constant Current 40V White-LEDs

Driver

Feature

Operating Voltage: 2.5V to 5.5V.

High Operating Frequency: 1MHz

High Output Voltage: Up to 40V(Typ.)

Digital Dimming Control.

Built-in Cycle-by Cycle Current-Limiting.

Built-in Soft-Start Function.

0.2V Low Reference Voltage

Thermal Overload Protection

SOT-23-6 Package

Application

GPS Navigation System

Compact Back Light Module

Constant Current Source

LED Module

Description

The G2621 step-up converter drives white LEDs with a

constant current to provide backlight in cell phones,

PDAs, and other hand-held devices. It features allowing

series connection of the white LEDs so that the LED

currents are identical for uniform brightness. An enable

input can be pulsed repeatedly to adjust LED’s

brightness. The fast 1.0MHz current-mode PWM control

allows for smaller capacitor and inductor. Fault condition

protection uses cycle-by-cycle current limiting to sense

maximum inductor current, thermal protection and

over-voltage protection. Also included soft-start eliminates

inrush current during start-up. The 0.2V low reference

voltage

minimized

the

power

loss

across

the

current-setting resistor.

The G2621 is available in SOT-23-6 packages.

Ordering Information

ORDER

NUMBER

MARKING

TEMP.

RANGE

PACKAGE

(Green)

G2621TB1U

2621x

-40°C to 85°C

SOT-23-6

Note: TB: SOT23-6

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

Use the tantalum capacitor to eliminate inductor noise on

※

output terminal when you want to control dimming function.

VIN

OVP

GND

G2621

SOT-23-6

VIN

OVP

GND

G2621

SOT-23-6

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