CM6565 Datasheet, PDF (3/19 Pages) Champion Microelectronic Corp. – Noise Free 16 pin Self-Start Interleaved PFC with 180 Degree Phase Shift CRM PFC Controller for 90+/85+

CM6565
Noise Free 16 pin Self-Start Interleaved PFC with
180 Degree Phase Shift CRM PFC Controller for 90+/85+
PIN DESCRIPTION
Pin No. Symbol
1 IAC
1 IAC
Description
Operating Voltage
Min.
Typ.
Max. Unit
During Normal Operation:
1.4
V
Multiplier input, it provides the information of line input
voltage.
It only needs one resistor (RAC) connected between line input
and IAC pin. The value of RAC typically is between 4 Mega
ohm to 10 Mega ohm
During the System Start up:
RAC serves as a bleed resistor for VCC pin
0
VCC+1V V
2 ZCDmaster Master PFC Zero current detection input. The threshold of the -0.3
pin is 80mV. When ZCDmaster is greater than ~ 80mV,
PFCOUT (master) may go high. When ZCDmaster is less
than ~ 80mV, PFCOUT (master) is low.
0.7
V
3 PG THL
4 Vrms1
5 Vrms2
6 SS
7 PGB
PG THL is an input I/O. The user can program the Low
0.75
Threshold of the Power Good which can determine the
comparator output of PGB (open drain) to be pulled high.
AC Brown out input.
0
It mirrors the IAC (pin1) current to Vrm1 and Vrms1 uses it
with Rrms1 and Crms1 to generate the first pole; then it uses
the second RC pole to interface with Vrms2 (pin5). AC brown
out uses the Vrms1 to determine brown out point. Its
threshold is 3V with 1V hysteresis.
Gain Modulator/Multiplier Vrms input. The value of Vrms2
0
should be 50% of Vrms1 average value.
PFC Soft Start pin: It supplies ~ 8uA to SS pin. It provides a
0
close-loop soft start function during power supply start up.
PFC Soft Start function can just need a simple capacitor to
ground and it can be around 1uF.
PGB is the PG comparator output. The input of PGB
0
comparator is using Vfb (pin 15) to compare with the high
threshold, 2.365V (preset internally) and the low threshold,
PGTHL (pin 3, Set by user).
When 380V is ready, pin 7 is open-drain and it will be pulled
low.
2.3
V
5
V
5
V
VCC
V
VCC
V
2008/10/09 Rev1.0
Champion Microelectronic Corporation
Page 3