Pfc - Renesas MCI-HV-1 User Manual

MCI-HV-1 User's Manual
4.1.3
Discharge control
When main power (AC or DC input) is shut off, the discharge switch is turned on and the bus voltage is
discharged through an 8.2 k resistor.
LED5 (labeled "Discharge") turns on during discharging.
again after the power is shut off, as voltage is applied internally and there is a risk of electric shock.

4.2 PFC

4.2.1 PFC control
Both single PFC and interleaved PFC control are available. For interleaved PFC control, 1-shunt and 2-
shunt current sensing are available. Shunt resistance is 5m for 1-shunt sensing and 10m for 2-shunt
sensing, respectively.
PFC current sensing signals are converted to analog signals ranging 0~AVCC according to the following
equation and output to CPU board connector as IPFC1_AD, IPFC2_AD.
R12UZ0138EJ0100 Rev.1.00
February 28, 2024
LED5
Fig. 4-2 Discharging LED
1-shunt sensing:
IPFC1_AD = I
2-shunt sensing:
IPFC1_AD = I
IPFC2_AD = I
400u
400u
4.7u
10m×2 R26
10m
R33
R35
CS_PFC-
Fig. 4-3 PFC control circuit
Do not touch the product until LED5 turns off
10
× 0.005 ×
R33//R35
1.2
10 AVCC
× 0.01 ×
+
R26
1.2
10
AVCC
× 0.01 ×
+
R27
1.2
R27
10m
PGND
PFC_CS2
PFC_CS1
AVCC
+
2
2
2
VBUS
560u×2
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