5.7

Typical USB-C battery powered application

In this application use case, the system is typically powered by embedded batteries and the USB connector is

used to recharge them.

Compared to the previous case, the TCPP01-M12 is now powered via GPIO1: This is possible thanks to the very

low TCPP01-M12 biasing current (120 µA worst case). In this configuration, the TCPP01-M12 consumes power

only during USB attachment. An attachment condition is detected via resistors R3 and R4.

Once a source has detected a SINK attachment, it releases automatically 5 V / 0.5 A on the VBUS. This voltage is

detected by the TCPP01-M12 and it turn-on the N-channel MOSFET T1 (needed power is drawn from IN_GD

pin). As the VBUS voltage increases, the attachment is detected through ADC.

In the Figure 18, the D1 diode ESDA25P35-1U1M is used to comply with the International electrotechnical

commission specification IEC61000-4 on the VBUS power line when it is subjected to switching and lightning

transients. For more information, please refer to AN4275: IEC61000-4-5 standard overview.

Please refer to AN5225 for more informations related to USB Type-CTM power delivery using STM32xx Series

MCUs and STM32xxx Series MPUs.

For more information on EMI filtering and ESD protection of USB datalines, please refer to AN4871: USB Type-C

protection and filtering.

TCPP01-M12

Typical USB-C battery powered application

DS12900 - Rev 1

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