RT8525

®

DS8525-01 March 2012

www.richtek.com

1

©

Copyright 2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Ordering Information

Note :

Richtek products are :

RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Suitable for use in SnPb or Pb-free soldering processes.

Boost Controller with Dimming Control

Pin Configurations

SOP-14

(TOP VIEW)

Marking Information

RT8525GS : Product Number

YMDNN : Date Code

General Description

The RT8525 is a wide input operating voltage range step

up controller. High voltage output and large output current

are feasible by using an external N-MOSFET. The RT8525

input operating range is from 4.5V to 29V.

The RT8525 is an optimized design for wide output voltage

range applications. The output voltage of the RT8525 can

be adjusted by the FB pin. The PWMI pin can be used as

a digital input, allowing WLED brightness control with a

logic-level PWM signal.

Features

VIN Range : 4.5V to 29V

Programmable Soft-Start Time

Programmable Boost SW Frequency from 50kHz to

600kHz

Output Over Voltage Protection

Output Under Voltage Protection

14-Lead SOP Package

RoHS Compliant and Halogen Free

Applications

LCD TV, Monitor Display Backlight

LEDDriver Application

RT8525

GSYMDNN

DRV

PGND

ISW

EN

OOVP

FB

FAULT

VDC

VIN

COMP

SS

FSW

AGND

PWMI

2

3

4

5

8

7

6

14

13

12

11

10

9

Typical Application Circuit

Package Type

S : SOP-14

RT8525

Lead Plating System

G : Green (Halogen Free and Pb Free)

M1

D1

L1

DRV

ISW

PGND

OOVP

FAULT

RT8525

VIN

VDC

EN

Chip Enable

FSW

SS

COMP

FB

14

11

13

9

10

2

1

3

5

4

12

8

AGND 6

PWMI

PWMI

7

12V

33µH

2.4k

50m

100k

0.33µF

56k

33k

27nF

100µF

1µF

1µF

150k

6k

3k

117k

100µF x 2

50V

24V