P9415-R datasheet(33/62 Pages) RENESAS

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P9415-R Datasheet

May 4, 2021

9.10.6 GP1/Q Main Pin and GP3/Q Offset Pin

If both GP1 and GP3 are low (< 0.2V), the P9415-R reports the default value programmed in the firmware. Q is 30 in the default configuration

and can be changed with a P9415-R Wireless Power Pro GUI; otherwise, the default Q factor value is decided by the following tables.

Table 7.

Q Factor Main – GP1

GP1 ≥ Vmin

GP1 < Vmax

Q_Main

Pup(R)

Pdown(R)

0.2

0.55V

100K

27K

0.55V

0.90V

100K

68K

0.90V

1.25V

100K

150K

1.25V

1.60V

47K

180K

1.60V

1.98V

47K

Table 8.

Q Factor Offset – GP3

GP3 ≥ Vmin

GP3 < Vmax

Q_Offset

Pup(R)

Pdown(R)

0.2V

47K

0.2

0.55V

100K

27K

0.55V

0.90V

100K

68K

0.90V

1.25V

100K

150K

1.25V

1.60V

47K

180K

1.60V

1.98V

47K

For example, if both GP1 and GP3 are pulled up, the reported Q factor value is 78(70+8). The AP can also change the reported Q factor by

writing to register 0x55 before the negotiation phase.

9.10.7 GP2/Thermistor Pin

The GP2 pin is connected to the internal ADC and can measure the voltage of the thermistor connected to measure the external temperature

on either the receiver coil or the PCB. The P9415-R sends interrupts to the AP if the voltage reaches below the threshold level (0.6V default,

configurable) to allow the AP an opportunity to reduce the temperature and prevent power transfer interruptions. The AP must convert the ADC

value into a pin voltage using the below equation. Voltage can be converted into temperature information based on the thermistor manufacturer

datasheet information.

Equation 1

Voltage on GP2 Pin in mV = (Register 0x42 [11:0] Data / 4095) * 10 * 2.1

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