Datasheet > IS31LT3910

IS31LT3910

更新时间： 2024-11-11 12:23:07

品牌	Logo	应用领域
美国芯成 - ISSI		驱动器
页数	文件大小	规格书
8页	290K
描述
UNIVERSAL HIGH BRIGHTNESS LED DRIVER

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IS31LT3910 数据手册

IS31LT3910

UNIVERSAL HIGH BRIGHTNESS LED DRIVER

WITH TEMPERATURE COMPENSATION

November 2011

GENERAL DESCRIPTION

FEATURES

The IS31LT3910 is a peak current mode control LED

driver IC. The IS31LT3910 operates in constant off-time

mode. It allows efficient operation of High Brightness

(HB) LEDs with voltage sources ranging from 8VDC to

450DC or 110VAC/220VAC. The IS31LT3910 includes

a PWM dimming input that can accept an external

control signal with a duty ratio of 0 - 100% and a

frequency of up to a few kilohertz. It also includes a 0 -

240mV linear dimming input which can be used both for

linear dimming and temperature compensation of the

LED current.



Wide input range from 8VDC to 450DC or

110VAC/220 VAC



Temperature compensation to regulate LED current

Application from a few mA to more than 1A output

Constant off-time operation

Linear and PWM dimming capability

Switch mode controller for single switch LED

drivers



Requires few external components for operation

The IS31LT3910 is ideally suited for buck LED drivers.

Since the IS31LT3910 operates in peak current mode

control, the controller achieves good output current

regulation without the need for any loop compensation.

It achieves good PWM dimming response because the

response time is limited only by the rate of rise and fall

of the inductor current, enabling very fast rise and fall

time.

APPLICATIONS



DC/DC or AC/DC LED driver applications

General purpose constant current source

Signal and decorative LED lighting

backlighting LED driver

APPLICATION CIRCUIT

VinDC8~450V

NTC

Rin

LEDS

IS31LT3910

VIN

GATE

VREF

Cin

PWMD

TOFF

GND

R_CS

C_OFF

Integrated Silicon Solution, Inc. — www.issi.com

Rev.A, 11/08/2011

12 3 4 5 6 7 8

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