MB39C601 Datasheet, PDF (16/37 Pages) Cypress Semiconductor – High power factor in single conversion

MB39C601
8.7 PCL Part
It is set the peak current of Primary Winding by connecting resistor with the PCL pin.
The maximum peak current of Primary Side is set by connecting resistor (RPCL) between the PCL pin and GND.
100kV
I_DRN(pk) = ( _RPCL )
An about 400ns blanking time of the beginning of switching cycle is masking the spike noise. As a result, it prevents the sense of
current from malfunctioning (See the figure below.).
Peak Current Control with PCL pin
t _{BLA N KC L}
V_{GA TE}
Current
Sense
I_{D R N}
Driver
DRN ^From
6
High-Voltage
MOSFET Source
GND
7
From
Optocoupler
Emitter
FB
1
I_FB
I_{F B}
Current Modulator
I _DRNPK
3
1
165 210
V_PCL, V
I_FB, µA
3
1
I_FB, µA
165 210
I _{PC L}
PCL
3
RPCL
Document Number: 002-08393 Rev.*A
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