FAN6921MR Fairchild Semiconductor, FAN6921MR Datasheet - Page 10

• Manufacturer Part Number: FAN6921MR
• Description: The highly integrated FAN6921MR combines Power Factor Correction (PFC) controller and Quasi-Resonant PWM controller
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN6921MR Rev. 1.0.2
Electrical Characteristics
V
PWM STAGE
Feedback Input Section
DET Pin OVP and Valley Detection Section
PWM Oscillator Section
t
I
t
DD
VALLEY-DELAY
ON-MAX-PWM
DET-SOURCE
Symbol
V
V
V
t
t
t
V
t
TIME-OUT
=15V, T
t
DET-OVP
DET-HIGH
OFF-BNK
OFF-MIN
DET-OVP
DET-LOW
t
FB-OLP
ΔV
FB-OLP
FB-SS
V
BW
Z
I
Av
V
A
V
OZ
FB
OZ
V
N
G
G
A
=-40°C ~105°C (T
Input-Voltage to Current Sense
Attenuation
Input Impedance
Bias Current
Zero Duty-cycle Input Voltage
Open-Loop Protection Threshold
Voltage
The Debounce Time for Open
Loop Protection
Internal Soft-Start Time
Comparator Reference Voltage
Open-Loop Gain
Gain Bandwidth
Output OVP(Latched) Debounce
Time
Maximum Source Current
Upper Clamp Voltage
Lower Clamp Voltage
Delay Time from Valley Signal
Detected to Output Turn-on
Leading-Edge Blanking Time for
DET-OVP (2.5V) and Valley
Signal when PWM MOS Turns
Off
Time-Out After t
Maximum On Time
Minimum Off Time
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
(4)
Parameter
(4)
A
(4)
OFF-MIN
(4)
(4)
=T
J
), unless otherwise specified.
(Continued)
(4)
(4)
A
0<V
FB>V
FB=V
V
V
I
I
V
V
DET
DET
V
FB
DET
FB
FB
= V
=0V~3.6V
≧V
=V
=-1mA
=1mA
CSPWM
=0V
Conditions
G
OZ
G
CSPWM
N
10
, T
<0.9
A
=25°C
/ V
FB
,
1/2.75
Min.
2.45
1.95
1.00
100
150
0.7
3.9
8.5
0.5
40
38
32
3
3
8
7
Continued on the following page…
1/3.00
Typ.
2.50
2.10
1.15
150
200
1.2
0.9
4.2
9.5
0.7
0.1
50
60
45
37
5
1
4
9
8
1/3.25
Max.
10.5
2.55
2.25
1.30
200
250
2.0
1.1
4.5
0.9
60
10
42
52
7
1
5
5
9
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Units
MHz
V/V
mA
mA
kΩ
ms
ms
dB
µs
ns
µs
µs
µs
µs
V
V
V
V
V
V
V
V