P9225-R Datasheet

© 2018 Integrated Device Technology, Inc.

6

November 12, 2018

2. Pin Descriptions

Table 1.

Pin Descriptions

Pins

Name

Type

Function

A1

COM1

Output

Open-drain output used to communicate with the transmitter. Connect a 47nF capacitor from

AC1 to COM1.

A2

EOC

Input

Active-HIGH End-of-Charge input pin. When connected to logic HIGH, the device sends an End

Power Transfer (i.e., charge complete) packet to the transmitter to terminate power delivery and

shuts down. Use a 10kΩ resistor to GND to pull this pin down to logic LOW by default.

A3

SCL

Input

Serial clock line. Open-drain pin. Connect this pin to a 5.1kΩ resistor to VDD18 pin if I2C access

by external AP is used. Otherwise, this pin can be left floating.

A4

VOSET

Input

Programming pin for setting the output voltage. Connect this pin to the center tap of the external

resistor divider to set the output voltage. For more information, refer to section 8.2 for different

output voltage settings.

A5

RPPG

Input

Received Power Packet Gain (RPPG) calibration pin for foreign object detection (FOD) tuning.

Connect this pin to the center tap of the external resistor divider to set the gain of the FOD. The

FOD is disabled by connecting RPPG and RPPO to GND. Do not leave this pin floating.

A6

COM2

Output

Open-drain output used to communicate with the transmitter. Connect a 47nF capacitor from

AC2 to COM2.

B1

COMA

Output

Open-drain output used to communicate with the transmitter. Connect a 47nF capacitor from

AC2 to COMA. If PMA mode is not used, this pin can be left floating.

B2

RSV0

–

Reserved pin.

B3

SDA

Input/Output Serial data line. Open-drain pin. Connect this pin to a 5.1kΩ resistor to VDD18 pin if I2C access

by external AP is used. Otherwise, this pin can be left floating.

B4

ILIM

Input

Programmable over-current limit pin. Connect this pin to the center tap of a resistor divider to set

the current limit. For more information about the current limit function, see section 8.5.

B5

EN

���� Input Active-LOWenablepin.PullingthispintologicHIGHforcesthedeviceintoShutDownMode.

When connected to logic LOW, the device is enabled. Do not leave this pin floating.

B6

COMB

Output

Open-drain output used to communicate with the transmitter. Connect a 47nF capacitor from

AC2 to COMB. If PMA mode is not used, this pin can be left floating.

C1, C6, J1, J2,

J3, J4, J5, J6

GND

GND

Ground.

C2

SINK

Output

Open-drain output for controlling the rectifier clamp. Short this pin to the VRECT pin.

C3

INT

���� Output Interruptflagpin.Thisisanopen-drainoutputthatsignalsfaultinterrupts.ItispulledLOWifany

of these faults exist: an over-voltage is detected, an over-current condition is detected, the die

temperature exceeds 140°C, or an external over-temperature condition is detected on the TS

pin.

It is also asserted LOW when EN is HIGH. Connect to VDD18 through a 10kΩ resistor. See

section 8.6 for additional conditions affecting the interrupt flag.

C4

RPPO

Input

Received Power Packet Offset (RPPO) calibration pin for FOD tuning. Connect this pin to the

center tap of the external resistor divider to set the offset of the FOD. The FOD is disabled by

connecting RPPG and RPPO to GND. Do not leave this pin floating.

C5

RSV4

Input

Reserved. This pin must be connected to a 10kΩ resistor to the VDD18 pin.