?2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6920MR " Rev. 1.0.8
8
Electrical Characteristics (Continued)
V
DD
=15V and T
A
=25癈 unless otherwise noted.
S mbol
Parameter
Conditions
Min.
T p. Max. Unit
PFC STAGE
Voltage Error Amplifier Section
Gm
ransconductance
(4)
100
125
150
祄ho
V
REF
Feedback Comparator Reference
oltage
2.465
2.500
2.535
V
V
INV-H
lamp High Feedback Voltage
RANGE=Open
2.70
2.75
2.80
V
RANGE=Ground
2.60
2.65
2.70
V
RATIO
lamp High Output Voltage Ratio
(4)
INV-H
/ V
REF
,
RANGE=Open
1.06
1.14
V/V
INV-H
/ V
REF
,
RANGE=Ground
1.04
1.08
V
INV-L
lamp Low Feedback Voltage
2.25
2.35
2.45
V
V
INV-OVP
ver-Voltage Protection for INV Input
RANGE=Open
2.90
2.95
V
RANGE=Ground
2.75
2.80
t
INV-OVP
ver-Voltage Protection Debounce Time
50
70
90
祍
V
INV-UVP
Under-Voltage Protection for INV Input
0.35
0.45
0.55
V
V
INV-PWMON
PWM ON Threshold Voltage on INV Pin
2.2
2.3
2.4
V
V
HYST-PWMON
Hysteresis for PWM ON Threshold
oltage on INV Pin
V
INV-
PWMON
-1.6
V
INV-
PWMON
-1.5
V
INV-
PWMON
-1.4
V
t
INV-UVP
Under-Voltage Protection Debounce
ime
50
70
90
祍
V
INV-BO
PWM and PFC Off Threshold for
Brownout Protection
1.15
1.20
1.25
V
V
COMP-BO
Limited Voltage on COMP Pin for
Brownout Protection
1.55
1.60
1.65
V
I
COMP-BURST
Internal Bias Current for PFC Burst Mode
120
150
180
礎
V
COMP-H
om arator Out ut Hi h Volta e
4.80
5.20
V
omparator Output High Voltage at PFC
Burst Mode
FB
=1.3 V, V
VIN
=1.2 V 2.20
2.30
2.40
FB
=1.3 V, V
VIN
=1.6 V 2.00
2.10
2.20
FB
=1.3 V, V
VIN
=2 V
1.80
1.90
2.00
V
COMP-L
omparator Output Low Voltage at PFC
Burst Mode
RANGE=Open,
FB
=1.3 V
0.9
1.0
1.1
V
V
OZ
ero Duty Cycle Voltage on COMP Pin
1.10
1.25
1.40
V
I
COMP
omparator Output Source Current
INV
=2.3 V,
COMP
=1.5 V
15
30
45
礎
INV
=1.5 V
0.50
0.75
1.00
mA
omparator Output Sink Current
RANGE=Open,
INV
=2.75 V,
COMP
=5 V
20
30
40
礎
RANGE=Ground,
INV
=2.65 V,
COMP
=5 V
20
30
40
Continued on the following page&
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