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UM0971 Folha de dados(PDF) 23 Page - STMicroelectronics

Nome de Peças UM0971
Descrição Electrónicos  STEVAL-IHM031V1 low voltage three-phase inverter demonstration board
PDF  45 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0971 Folha de dados(HTML) 23 Page - STMicroelectronics

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UM0971
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Doc ID 17701 Rev 1
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2.7
Temperature sensing and protection
A hardware temperature sensing has also been implemented on the STEVAL-IHM031V1
demonstration board. As this signal is available on the MC connector, with a proper control
logic, this feature helps to fully protect the switches against damage when power loss
reaches some defined value.
The temperature is sensed with an NTC resistor placed close to the power MOSFET device.
The measured analog value is fed through the MC connector to the control unit part and, for
instance, can be read with an AD converter of the microcontroller.
Figure 14.
Temperature sensing circuit
With the following used resistor values:
RNTC = 10 k
Ω, R1 = 130 Ω, R2 = r = 10 kΩ, and R = 39 kΩ, the shut down temperature is
around 70 °C.



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