Datasheet > ZXLD1352

ZXLD1352

更新时间： 2022-12-14 14:28:37

品牌	Logo	应用领域
捷特科 - ZETEX		驱动器开关
页数	文件大小	规格书
22页	648K
描述
350mA LED driver with internal switch and enhanced PWM dimming range

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ZXLD1352 数据手册

A Product Line of

Diodes Incorporated

ZXLD1352

350mA LED driver with internal switch and enhanced PWM dimming

range

Description

The ZXLD1352 is

continuous mode The ADJ pin will accept either a DC voltage or a

inductive step-down converter, designed for PWM waveform. DC voltages between 0.3V and

driving single or multiple series connected 2.5V allow adjustment of output current from

LEDs efficiently from a voltage source higher 25% to 200% of nominal. 1000:1 adjustment of

than the LED voltage. The device operates output current is possible using PWM control.

from an input supply between 7V and 30V and

provides an externally adjustable output

current of up to 350mA. Depending upon

supply voltage and external components, this

can provide up to 8 watts of output power.

The ZXLD1352 includes the output switch and

a high-side output current sensing circuit,

which uses an external resistor to set the

nominal average output current.

Applying a voltage of 0.2V or lower to the ADJ

pin turns the output off and switches the device

into a low current standby state.

The device is assembled in a TSOT23-5 pin

package.

Output current can be adjusted above, or

below the set value, by applying an external

control signal to the 'ADJ' pin.

Features

Applications

•

Simple low parts count

•

Low voltage halogen replacement LEDs

Automotive lighting

Low voltage industrial lighting

LED back-up lighting

Internal 30V NDMOS switch

350mA output current

Single pin on/off and brightness control

using DC voltage or PWM

1000:1 PWM dimming range

Illuminated signs

•

Soft-start

(*)

High efficiency (up to 95%

)

Wide input voltage range: 7V to 30V

40V transient capability

Output shutdown

Up to 1MHz switching frequency

Inherent open-circuit LED protection

Typical 4% output current accuracy

(*) Using standard external components as specified under electrical characteristics. Efficiency is dependent upon the

number of LEDs driven and on external component types and values.

Pin connections

Typical application circuit

ZLLS1000

V_IN

(12V - 30V)

0.33

GND

L1 47␮H

ADJ

SENSE

1␮F

PWM

TSOT23-5

Top view

SENSE

ADJ

ZXLD1352

GND

Issue 1 - August 2008

www.zetex.com

www.diodes.com

12 3 4 5 6 7...22

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