FAN6921ML Datasheet, PDF (10/23 Pages) Fairchild Semiconductor – Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller

Electrical Characteristics (Continued)
VDD=15V, TA=-40~105°C (TA=TJ), unless otherwise specified.
Symbol
Parameter
Conditions
DET Pin OVP and Valley Detection Section
VDET-OVP
Av
Bw
Comparator Reference Voltage
Open-Loop Gain⁽⁴⁾
Gain Bandwidth⁽⁴⁾
tDET-OVP
IDET-SOURCE
VDET-HIGH
VDET-LOW
tVALLEY-DELAY
tOFF-BNK
Output OVP(Latched) Debounce Time
Maximum Source Current
VDET=0V
Upper Clamp Voltage
IDET=-1mA
Lower Clamp Voltage
IDET=1mA
Delay from Valley Signal Detected to Output Turn-On⁽⁴⁾
Leading-Edge Blanking Time for DET-OVP (2.5V) and
Valley Signal when PWM MOS Turns Off ⁽⁴⁾
tTIME-OUT Time-Out After tOFF-MIN
PWM Oscillator Section
tON-MAX-PWM
tOFF-MIN
VN
VG
ΔVG
Maximum On Time
Minimum Off Time
VFB ≥ VN
VFB=VG
Beginning of Green-On Mode at FB Voltage Level
Beginning of Green-Off Mode at FB Voltage Level
Hysteresis for Beginning of Green-Off Mode at FB
Voltage Level
VCTL-PFC-OFF
Threshold Voltage on FB to
Disable PFC
Threshold Voltage on FB to
Disable PFC
RANGE Pin Internally
Open
RANGE Pin Internally
Ground
VCTL-PFC-ON
Hysteresis Voltage on FB to
Enable PFC
Hysteresis Voltage on FB to
Enable PFC
RANGE Pin Internally
Open
RANGE Pin Internally
Ground
tPFC-OFF
PFC OFF Debounce Time to
Disable PFC
PFC Status from ON
to OFF
tINHIB-PFC-OFF
tPFC-ON
Inhibit Time During tPFC-OFF
PFC ON Debounce Time to
Enable PFC ⁽⁴⁾
tPFC-OFF
PFC Status from OFF
to ON
tSTARTER-PWM Start Timer (Time-Out Timer)
VFB < VG
VFB > VFB-OLP
Min. Typ. Max. Units
2.45
2.50
60
1
100
150
0.5
0.7
150
200
3
4
8
9
2.55
V
dB
MHz
200
µs
1
mA
5
V
0.9
V
250
ns
5
µs
10
µs
38
45
52
µs
7
8
9
µs
32
37
42
µs
1.95
2.10
2.25
V
1.00
1.15
1.30
V
0.1
V
1.70
1.75
1.80
V
1.65
1.70
1.75
1.95
2.00
2.05
V
1.75
1.80
1.85
400
500
600
ms
30
34
38
µs
150
µs
2.0
2.5
3.0
ms
25.5
32.5
39.5
µs
Continued on the following page…
© 2010 Fairchild Semiconductor Corporation
FAN6921ML • Rev. 1.0.1
10
www.fairchildsemi.com