RT1650

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is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS1650-00

July

2015

4

Pin No.

Pin Name

I/O

Pin Function

D6

CLMP1

O

Open Drain Output for Over-voltage Clamp Protection. Connect a 0.47

F

ceramic capacitor between this pin to AC1/AC2. When the RECT voltage

exceeds 11.5V, both switches will be turned on and the capacitors will act

as a low impedance to protect the IC from damage.

F6

CLMP2

O

E1, H4,

H5

GND

Analog Ground.

E2, E3

G4, G5

NC

No Connection. Keep this pin as floating.

Do not connect this pin to

power input or ground.

E4, F4

VDD1

O

Voltage Supply for Internal Circuit. Connect a 1

F ceramic capacitor

between this pin and GND.

E5, F5

VDD2

O

Voltage Supply for Internal Circuit. Connect a 1

F ceramic capacitor

between this pin and GND.

F1

SCL

I

F2

SDA

I/O

F3

GPIO

I/O

General Purpose Input/Output.

H1

CHG

O

Open-Drain Indicator Output. When the output regulator is enabled, this

pin is pulled to low.

H2

ADEN

O

Enable Control Output for External P-FET connecting ADD and OUT. This

pin is pulled to the higher of OUT and ADD when turning off the external

FET. This voltage tracks approximately 4V below ADD when voltage is

present at ADD.

H3

ADD

I

Adapter Power Detection Input. Connect this pin to the adapter input.

When a voltage is applied to this pin, wireless power is disabled and

ADEN is pulled low. If not used, this pin should be connected to ground.

G1

TS

I

Temperature Sense Input. Connect a NTC between this pin and GND for

temperature sensing. If the temperature sensing function is not desired,

connect a 24k

 resistor to GND. Host side can control this pin to send end

power transfer (EPT) to the transmitter: pull-low for EPT fault; pull-up for

EPT termination.

G2

MODE0

I

Operation Mode Control Input. These two pins are used to set power

source operation mode.

[MODE0, MODE1] = [0, 0]. Auto mode. Adapter power prior.

[MODE0, MODE1] = [0, 1]. Wireless power mode.

[MODE0, MODE1] = [1, 0]. Adapter power mode and OTG mode

[MODE0, MODE1] = [1, 1]. Disable both adapter and wireless powers.

G3

MODE1

I