ZXLD1356Q Просмотр технического описания (PDF) - Diodes Incorporated.

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Компоненты Описание

производитель

ZXLD1356Q

AUTOMOTIVE GRADE 60V 550mA LED DRIVER

Diodes Incorporated. 

ZXLD1356Q

Q

Pin Descriptions

Pin

Name

LX

GND

ADJ

ISENSE

VIN

Pad

Pin Number

TSOT25 V-DFN3030-6

1

1

2

2, 5

3

3

4

4

5

6

—

Pad

Function

Drain of NDMOS Switch

Ground (0V)

Multi-Function On/Off and Brightness Control Pin:

 Leave floating for normal operation.

(VADJ = VREF = 1.25V giving nominal average output current IOUTnom = 0.2V/RS)

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

 Drive with DC voltage (0.3V < VADJ < 2.5V) to adjust output current from 24% to 200% of

IOUTnom

 Connect a capacitor from this pin to ground to define soft-start time.

Soft-start time is approximately 0.2ms/nF

Connect resistor RS from this to VIN to define nominal average output current IOUTnom = 0.2/RS

(Note: RSMIN=0.36V with ADJ pin open circuit)

Input Voltage (6V to 60V)

Decouple to ground with 4.7µF of higher X7R ceramic capacitor close to device

Exposed Pad (EP) - connected to device substrate.

To improve thermal impedance of package the EP must be connected to power ground but should

not be used as the 0V (GND) current path.

It can be left floating but must not be connected to any other voltage other than 0V.

Functional Block Diagram

VIN

D1

RS

L1

5 VIN

4 ISENSE

1 LX

C1

4.7mF

5V

R1

Voltage

regulator

0.2V

-

+

Adj

3

R4

R5

50K 20K

600KHz

R2

D1

1.25V

Gnd

2

-

+ R3

1.35V

-

+

Low voltage

detector

MN

-

+

Figure 1 Block Diagram - Pin Connections Shown for TSOT25 Package

ZXLD1356Q

Document number: DS37077 Rev. 2 - 2

2 of 28

www.diodes.com

October 2015

© Diodes Incorporated

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