Circuit Block Diagram - TDK-Lambda PFH500 Series Instruction Manual

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Circuit Block Diagram

Vac
Fuse
NOTE: The blocks with red font are the external components required for the operation of PFH module.
SWITCHING FREQUENCY
PFC Converter (Fixed)
DC-DC Converter (Fixed)
Vo = 12 VDC
Vo = 28 VDC
Vo = 48 VDC
BIAS Converter
REV 2.8 (March 30, 2020)
PFC Circuit
Inrush
Bridgeless
Circuit
PFC Conv.
Relay
Vin Detect
PFC
UVP/OVP
Digital
Controller
Iin Detect
OCP1 URT
OTP1
DC-DC Circuit
Vbus
DC-DC
Bridge
Converter
Ipeak
Sense
Digital
Isolators
Vbus
OVP1
UVP2
Bias
Supplies
145 kHz
135 kHz (Primary)
145 kHz (Primary)
165 kHz (Primary)
135 kHz
TDK-Lambda
INSTRUCTION MANUAL
Synchro.
Vo
Rectifiers
DC-DC
Vo_sns
Digital
Controller
ON/OFF
(OVP/UVP)
Trim
Rs
URT
PG
PMBus
Vaux
Io SNS
OTP2
270 kHz (Secondary Ripple)
290 kHz (Secondary Ripple)
330 kHz (Secondary Ripple)
PFH500-SERIES
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