ZXLD1362 datasheet(2/28 Pages) DIODES

2 / 28 page

ZXLD1362

Document number: DS33472 Rev. 2 - 2

2 of 28

www.diodes.com

December 2010

A Product Line of

Diodes Incorporated

Block Diagram

Figure 1. Block Diagram

Pin Description

Name

No.

Description

Drain of NDMOS switch

GND

Ground (0V)

ADJ

Multi-function On/Off and brightness control pin:

• Leave floating for normal operation.(V

ADJ = VREF = 1.25V giving nominal average output current

IOUTnom = 0.1/RS)

• Drive to voltage below 0.2V to turn off output current

• Drive with DC voltage (0.3V < V

ADJ < 2.5V) to adjust output current from 25% to 200% of IOUTnom

• Connect a capacitor from this pin to ground to increase soft-start time.

• Soft-start time increases approximately 0.2ms/nF)

ISENSE

Connect resistor RS from this pin to VIN to define nominal average output current IOUTnom = 0.1/RS

(Note: RSMIN=0.1Ω with ADJ pin open circuit)

VIN

Input voltage (6V to 60V). Decouple to ground with 4.7µF of higher X7R ceramic capacitor close to

device

Low voltage

detector

Voltage

regulator

ISENSE

Adj

Gnd

VIN

50K

20K

1.25V

1.35V

0.2V

600KHz

4.7mF

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