6

RT4532

www.richtek.com

DS4532-01 August 2015

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Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Typical Application Circuit

Timing Diagram

Power Sequence

PWM

EN

I(LED)

Reg0x04 = FF

As Reg Default

Reg0x04 =

00

Reg0x02 = C7

PWM Enable

I(MAX)

I(MIN)

0

Duty =50%

I(MAX)/2

Note : PWM prd : count by OSC : 17.6MegHz

> 1024 : Resolution = 7bits & < 1000 : Resolution = 8bits

Count 2^17

Clock

Count 2^17

Clock

0

Reg0x02<0> = 0

DEV_EN Disable

EN

VOUT

VIN

2.5V to 5.5V

L

3

RT4532

LX

10

8, 11 (Exposed Pad)

2

9

FB1

FB2 6

7

1µF

10µH

10µF

PWM

1

SCL

4

SDA

5

Enable

GND

x 6