STNRGPF01
STNRGPF01 block diagram
3.2
Measurements section
The STNRGPF01 includes 4 input measurement channels. These inputs are defined from
pin 31 to pin 34 and they are specified below.
Pin 31. VIN: RMS input voltage
Pin 32. Temp: ambient temperature
Pin 33. IOUT: PFC output current
Pin 34: VOUT: PFC output voltage
Pin 31, VIN
This is the input of the RMS line voltage and also implements the voltage input feed-forward.
The input voltage feed-forward modifies the PI output, compensating rapidly the effect of the
line voltage changes. See Figure 5.
Pin 32, Temp
This is the input for the board temperature measurement. An external ST temperature
sensor, STLM20, measures the board temperature. The PWM activity will be stopped when
the temperature exceeds the user-defined threshold. See Figure 4.
Figure 4. Temperature measurement
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STMICROELECTRONICS [ ST ]
