Datasheet > ZXLD1350_07

ZXLD1350_07

更新时间： 2022-04-23 23:00:11

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
24页	729K
描述
350mA LED driver with internal switch

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ZXLD1350_07 数据手册

ZXLD1350

350mA LED driver with internal switch

Description

The ZXLD1350 is

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

inductive step-down converter, designed for PWM waveform. Depending upon the control

driving single or multiple series connected frequency, this will provide either a continuous

LEDs efficiently from a voltage source higher or a gated output current. The PWM filter

than the LED voltage. The device operates components are contained within the chip.

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 ZXLD1350 includes the output switch and

a high-side output current sensing circuit,

which uses an external resistor to set the

nominal average output current.

The PWM filter provides a soft-start feature by

controlling the rise of input/output current. The

soft-start time can be increased using an

external capacitor from the ADJ pin to ground.

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

Internal PWM filter

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

V_IN(12V - 30V)

0.33

GND

L1 47␮H

ZLLS1000

ADJ

SENSE

1␮F

TSOT23-5

Top view

SENSE

ADJ

N/C

ZXLD1350

GND

Issue 6 - April 2007

www.zetex.com

12 3 4 5 6 7...24

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