RT1650

Copyright © 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS1650-00

July

2015

www.richtek.com

3

Typical Application Circuit

RT1650

CHG

ADD

OUT

System

Load

ADEN

PGND

COM1

BOOT1

CLMP1

USB or

AC Adapter Input

C5

COM2

BOOT2

CLMP2

AC1

AC2

12

μH Coil

D1

R4

RECT

TS

NTC

Q1

1

μF/10V x 1

0.1

μF/10V x 1

1.5k

10

μF/16V x 2

GND

R1

33k

NCP15WF104F03RC

100k ohm

GPIO

SDA

SCL

MODE0

MODE1

1

μF/10V x 1

0.1

μF/10V x 1

0.47

μF/50V

22nF/50V

10nF/50V

10nF/50V

22nF/50V

0.47

μF/50V

47nF/50V x 4

VDD1

VDD2

1

μF/10V

1

μF/10V

PMDPB80XP

WPC Standard

1.8

μF/50V

Note : The component value and the maximum voltage rating is based on the WPC standard transmitter and 5V

adapter application. The customer should modify it depend on the different design and application.

Functional Pin Description

Pin No.

Pin Name

I/O

Pin Function

A1

BOOT2

O

Bootstrap Supply for Driving the High-side FETs of Synchronous Rectifier.

Connect a 10nF ceramic capacitor from BOOT1 to AC1 and from BOOT2

to AC2.

A6

BOOT1

O

A2 to A5

G6, H6

PGND

Power Ground.

B1 to B3

AC2

I

AC Power Input from Receiver Coil.

B4 to B6

AC1

I

C1 to C5

RECT

O

Output of Synchronous Rectifier. Connect a ceramic capacitor (10

F to

22

F) between this pin to PGND.

C6

COM1

O

Open-Drain Output for Communication with Transmitter. Connect through

a capacitor to AC1/AC2 for capacitive load modulation.

E6

COM2

O

D1 to D5

OUT

O

Power Output of Regulator.