FAN6921ML Datasheet, PDF (9/23 Pages) Fairchild Semiconductor – Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller

Electrical Characteristics (Continued)
VDD=15V, TA=-40℃~105℃ (TA=TJ), unless otherwise specified.
Symbol
Parameter
Conditions
PFC Output Section
PFC Gate Output Clamping
VZ
Voltage
VDD= 25V
VOL
PFC Gate Output Voltage Low VDD=15V, IO=100mA
VOH
PFC Gate Output Voltage High VDD=15V, IO=100mA
tR
PFC Gate Output Rising Time
VDD=12V, CL=3nF,
20~80%
tF
PFC Gate Output Falling Time
PFC Zero Current Detection Section
VDD=12V, CL=3nF,
80~20%
VZCD
Input Threshold Voltage Rising
Edge
VZCD Increasing
VZCD-HYST Threshold Voltage Hysteresis VZCD Decreasing
VZCD-HIGH Upper Clamp Voltage
IZCD=3mA
VZCD-LOW Lower Clamp Voltage
IZCD=-1.5mA
Starting Source Current
VZCD-SSC _{Threshold Voltage}
IZCD=5µA
tDELAY
Maximum Delay from ZCD to
Output Turn-On
VCOMP=5V, fS=60KHz
tRESTART-PFC Restart Time
tINHIB
Inhibit Time (Maximum
Switching Frequency Limit)
VCOMP=5V
VZCD-DIS
tZCD-DIS
PFC Enable/Disable Function Threshold Voltage
PFC Enable/Disable Function
Debounce Time
VZCD=100mV
PWM Stage
Feedback Input Section
AV
Input-Voltage to Current Sense AV=ᇞVCS /ᇞVFB,
Attenuation⁽⁴⁾
0<VCS<0.9
ZFB
Input Impedance⁽⁴⁾
FB>VG
IOZ
Bias Current
FB=VOZ
VOZ
Zero Duty-Cycle Input Voltage
VFB-OLP Open-Loop Protection Threshold Voltage
tFB-OLP
tFB-SS
The Debounce Time for Open-Loop Protection
Internal Soft-Start Time⁽⁴⁾
VFB=0V~3.6V
Min. Typ. Max. Units
14.0
15.5
17.0
V
1.5
V
8
V
30
65
100
ns
30
50
70
ns
1.9
2.1
2.3
V
0.25
0.35
0.45
V
8
10
V
0.55
0.70
0.85
V
0.8
0.9
1.0
V
100
200
ns
300
500
700
µs
1.5
2.5
3.5
µs
150
200
250
mV
100
150
200
µs
1/2.75 1/3.00 1/3.25
V/V
3
5
7
KΩ
1.2
2.0
mA
0.7
0.9
1.1
V
3.9
4.2
4.5
V
40
50
60
ms
8.5
9.5
10.5
ms
Continued on the following page…
© 2010 Fairchild Semiconductor Corporation
FAN6921ML • Rev. 1.0.1
9
www.fairchildsemi.com