UM0900 datasheet(22/43 Pages) STMICROELECTRONICS

Numer części	UM0900

Szczegółowy opis	1 kW 3-phase motor control demonstration board featuring

PDF	43 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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22 / 43 page

Board description

UM0900

22/43

Doc ID 17028 Rev 1

3.3.8

Temperature feedback and overtemperature protection (OTP)

Hardware overtemperature protection is also implemented on the STEVAL-IHM025V1

demonstration board. This feature fully protects the IPM module against damage when the

temperature on the junction on the IPM overruns a defined value. The temperature is

sensed through an NTC resistor which is integrated into the IPM. The measured signal is

fed through the J4 motor connector to the MCU control unit and can be read with an A-D

converter. The signal is also fed to the U6 comparator where it is compared with a 2.5 V

reference voltage which is built around U7 precision reference TS3431. The output signal of

the U6 comparator is fed into the SD pin of the IPM to stop the commutation of the

connected motor. With the value of the integrated NTC resistor inside the IPM and R100

resistor equal to 2.2k

Ω, the shutdown temperature is roughly 85 °C.

UM0900 Arkusz danych(PDF) 22 Page - STMicroelectronics