FAN6961 Datasheet, PDF (6/13 Pages) Fairchild Semiconductor – Boundary Mode PFC Controller

Electrical Characteristics
VCC=15V and TA=25°C unless otherwise noted.
Symbol
Parameter
Zero Current Detection Section
VZCD Input Threshold Voltage Rising Edge
HYS of
VZCD
Threshold Voltage Hysteresis
VZCD-HIGH Upper Clamp Voltage
VZCD-LOW Lower Clamp Voltage
tDEAD Maximum Delay, ZCD to Output Turn-On
tRESTART Restart Time
tINHIB
VDIS
Inhibit Time (Maximum Switching
Frequency Limit)
Disable Threshold Voltage
tZCD-DIS Disable Function Debounce Time
Maximum On Time Section
VMOT Maximum On Time Voltage
tON-MAX
Maximum On Time Programming
(Resistor Based)
Conditions
VZCD Increasing
VZCD Decreasing
IZCD=3mA
IZCD=-1.5mA
VCOMP=5V,
fSW=60KHz
Output Turned Off by
ZCD
RMOT=24kΩ
RMOT=24kΩ,
VZCD=100mV
RMOT=24kΩ, VCS=0V,
VCOMP=5V
Min. Typ. Max. Units
1.9
2.1
2.3
V
0.35
V
12
V
0.3
V
100
400
ns
300 500 700
μs
2.8
μs
150 200 250
mV
800
μs
1.25 1.30 1.35
V
25
μs
© 2008 Fairchild Semiconductor Corporation
FAN6961 • Rev. 1.0.2
6
www.fairchildsemi.com