zxld1356 Zetex Semiconductors plc., zxld1356 Datasheet

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zxld1356

Manufacturer Part Number

zxld1356

Description

High Accuracy 550ma, 60v Led Driver With Internal Switch

Manufacturer

Zetex Semiconductors plc.

Datasheet

1.ZXLD1356.pdf (32 pages)

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Company:

Amily Shenzhen XNWY Technology Co., Ltd

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

zxld1356ET5TA

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ZXLD1356

High accuracy 550mA, 60V LED driver with internal switch

Description

The

inductive step-down converter, designed for

driving single or multiple series connected

LEDs efficiently from a voltage source higher

than the LED voltage. The device operates

from an input supply between 6V and 60V and

provides an externally adjustable output

current of up to 550mA. Depending upon

supply voltage and external components, this

can provide up to 30 watts of output power.

The ZXLD1356 includes the output switch and

a high-side output current sensing circuit,

which uses an external resistor to set the

nominal average output current.

Output current can be adjusted above, or

below the set value, by applying an external

control signal to the 'ADJ' pin.

Features

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Pin connections

Issue 2 - September 2008

© Diodes Incorporated 2008

GND

ADJ

LX

Typically better than 0.8% output current

accuracy

Available in thermally enhanced DFN

package

Simple and with low part count

Single pin on/off and brightness control

using DC voltage or PWM

PWM resolution up to 1000:1

High efficiency (up to 97%)

Wide input voltage range: 6V to 60V

Inherent open-circuit LED protection

1

2

3

ZXLD1356

TSOT23-5

Top view

5

4

V

I

SENSE

IN

is

a

GND

ADJ

LX

continuous

1

2

3

DFN633

Top view

4

6

5

mode

V

GND

I

SENSE

IN

1

The ADJ pin will accept either a DC voltage or a

PWM waveform. Depending upon the control

frequency, this will provide either a continuous

(dimmed) or a gated output current. Soft-start

can be forced 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.

Applications

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Typical application circuit

Low voltage halogen replacement LEDs

Automotive lighting

Low voltage industrial lighting

LED back-up lighting

Illuminated signs

Emergency lighting

SELV lighting

LCD TV backlighting

Refrigeration lights

V

IN

(24V)

Diodes Incorporated

GND

C1

A Product Line of

100nF

4.7 F

ADJ

V

IN

D1

0.36

Rs

ZXLD1356

I

SENSE

GND

www.diodes.com

www.zetex.com

L1

LX

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