STEVAL-ISF002V1 STMicroelectronics, STEVAL-ISF002V1 Datasheet - Page 10

• Manufacturer Part Number: STEVAL-ISF002V1
• Description: BOARD EVALUATION
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISF002V1

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10422

PFC basics and operating principles
Note:
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Figure 5.
The power section is composed of the STEVAL-ISF002V1 (covered in this user manual).
The control section is composed of the STEVAL-IHM022V1 (covered in UM0686).
Figure 6.
By means of a "voltage error compensator" it is possible to follow the target of the output
voltage. Moreover, its output is used as a scaling factor for the Vac, the latter used as the
current reference input for the "current error compensator". The output of this last PI is the
actual duty cycle of the PFC power MOSFET.
Digital PFC implementation scheme
Block diagram of the voltage and current PI regulator
Doc ID 16854 Rev 1
UM0877