2

RT4531

www.richtek.com

DS4531-01

July 2016

©

Copyright

2016 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

WL-CSP-9B 1.35x1.35 (BSC)

(TOP VIEW)

Pin Configurations

Marking Information

33W

33 : Product Code

W : Date Code

ISET

EN

IFB1

GND

SW

PWM

AGND

A1

A2

A3

B3

B1

C1

C2

C3

B2

Pin No.

Pin Name

Pin Function

A1

ISET

Full-Scale LED Current Set Pin. Connecting a resistor to the pin programs the

full-scale LED current.

A2

IFB2

Single Output 2 for Backlight LED.

A3

IFB1

Single Output 1 for Backlight LED.

B1

PWM

Enable Control, and PWM Dimming Signal Input.

B2

AGND

Analog Ground.

B3

GND

Power Ground.

C1

EN

Enable Control, and 1-Wire Dimming Signal Input.

C2

VIN

Supply Input Pin.

C3

SW

Switch Node of Boost Converter.