PAM2861

Document number: DSxxxxx Rev. 1 - 1

2 of 12

www.diodes.com

July 2013

© Diodes Incorporated

PAM2861

A Product Line of

Diodes Incorporated

Typical Applications Circuit

Pin Descriptions

Pin

Number

Pin

Name

Function

1

LX

Drain of NDMOS switch.

2

GND

Ground (0V)

3

VSET

• Multi-function On/Off and brightness control pin:

• Leave floating for normal operation.

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

• Drive with PWM signal from open-collector or open-drain transistor, to adjust output current. Adjustment range

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

(Default soft-start time = 0.1ms. Additional soft-start time is approx.1.5ms/1nF)

4

ISENSE

Connect resistor RS from this pin to VIN to define nominal average output current

5

VIN

Input voltage (6V to 40V). Decouple to ground with 10

μF or higher X7R ceramic capacitor close to device.