P9242-R datasheet(6/38 Pages) RENESAS

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P9242-R Datasheet

January 16, 2018

2. Pin Descriptions

Table 1.

Pin Descriptions

Pins

Name

Type

Function

Input

Active-LOW enable pin. When connected to logic HIGH, the P9242-R enters the Shut

Down Mode, which has a typical current consumption of 25μA. When connected to logic

LOW, the device is in normal operation.

2, 6, 34, 41, EP

GND

–

Ground connection.

PREG

Output

Regulated 5V output used for internal device biasing. Connect a 1μF capacitor from this

pin to ground. This pin must not be externally loaded.

VIN

Input

Input power supply. Connect a 10μF capacitor from this pin to ground.

SW_S

Output

Step-down regulator`s switch node. Connect one of the terminals of the 4.7μH inductor to

this pin.

LDO33

Output

Regulated 3.3V output used for internal device biasing. Connect a 1μF capacitor from this

pin to ground. This pin should not be externally loaded.

VIN_LDO

Input

Linear regulator input power supply. Connected this pin to the 5V output of the step-down

regulator.

LDO18

Output

Regulated 1.8V output used for internal device biasing. Connect a 1μF capacitor from this

pin to ground. This pin should not be externally loaded.

LED1

Input

Open-drain output. Connect an LED to this pin

LED2

Open-drain output. Connect an LED to this pin.

VDDIO

Input

Input power supply for internal biasing. This pin must be connected to LDO33.

SCL

Input

I2C interface clock input. Connect a 5.1kΩ pull-up resistor to LDO33 rail.

SDA

I/O

I2C interface data input and data output, connect a 5.1kΩ pull-up resistor to LDO33 rail.

ILIM/FOD

Input

Programmable over-current limit and foreign object detection pin. Connect the center tap

of the resistor divider to this pin to set the current-limit threshold and FOD threshold. For

more information on setting the current limit and FOD, see section 7.2.

LED/Q-Fact

Input

Programmable LED pattern selection and Q-factor enable/disable. Connect the center tap

of a resistor divider to this pin. For more information on setting the LED pattern and Q-

factor enable/disable, see section 7.9.

VCOIL

Input

Input for coil voltage sensing.

Input

Remote temperature sensor for over-temperature shutdown. Connect to the NTC

thermistor network. If not used, connect to the LDO33 pin through the 10kΩ resistor.

BUZR

Output

Buzzer output. Connect a buzzer to this pin.

OVP_CTL

I/O

Logic HIGH during power transfer phase used to scale down the voltage to detect over-

voltage for VCOIL pin.

Q_DRV1

I/O

Control signal for Q factor measurement circuit.

Q_DRV2

I/O

Control signal for Q factor measurement circuit.

13, 14, 25, 26,

27, 28, 29, 42,

RSV

–

Reserved for internal use. Do not connect.

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