FAN4800AU 데이터 시트보기 (PDF) - Fairchild Semiconductor
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FAN4800AU Datasheet PDF : 19 Pages
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Electrical Characteristics (Continued)
Unless otherwise noted, VDD=15V, TA= 25°C, TA=TJ, RT=6.8kΩ, and CT=1000pF.
Symbol
Parameter
Condition
Voltage Error Amplifier
VREF
AV
Reference Voltage
Open-Loop Gain(3)
Gmv
Transconductance
IFBPFC-L Maximum Source Current
IFBPFC-H Maximum Sink Current
IBS
Input Bias Current
VVEA-H
Output High Voltage on VVEA
VVEA-L
Output Low Voltage on VVEA
Current Error Amplifier
VNONINV=VINV, VVEA=3.75V
VFBPFC=2V, VVEA=1.5V
VFBPFC=3V, VVEA=6V
GmI
Transconductance
VOFFSET Input Offset voltage
VIEA-H
Output High Voltage
VIEA-L
Output Low Voltage
IL
Source Current
IH
Sink Current
AI
Open-Loop Gain(3)
TriFault Detect™
VNONINV=VINV, VIEA=3.75V
VVEA=0V, IAC Open
VISENSE= -0.6V, VIEA=1.5V
VISENSE= +0.6V, VIEA=4.0V
tFBPFC-OPEN Time to FBPFC Open
VFBPFC=VPFC-UVP to FBPFC OPEN,
470pF from FBPFC to GND
VPFC-UVP
PFC Feedback Under-Voltage
Protection
Gain Modulator
IAC
Input for AC Current(3)
GAIN
Gain Modulator(4)
BW
Bandwidth(3)
VO(gm)
Output Voltage=5.7kΩ ×
(ISENSE-IOFFSET)
PFC ILIMIT Comparator
VPFC-ILIMIT
Peak Current Limit Threshold
Voltage, Cycle-by-Cycle Limit
Multiplier Linear Range
IAC=17.67µA, VRMS=1.080V
VFBPFC=2.25V
IAC=20µA, VRMS=1.224V
VFBPFC=2.25V
IAC=25.69µA, VRMS=1.585V
VFBPFC=2.25V
IAC=51.62µA, VRMS=3.169V
VFBPFC=2.25V
IAC=62.23µA, VRMS=3.803V
VFBPFC=2.25V
IAC=40µA
IAC=50µA, VRMS=1.224V
VFBPFC=2.25V
△VPK
PFC ILIMIT-Gain Modulator
Output
IAC=17.67µA, VRMS=1.08V
VFBPFC=2.25V
Min. Typ. Max. Unit
2.45 2.50 2.55 V
35
42
dB
50
70
90 µmho
40
50
µA
-50 -40 µA
-1
1
µA
5.8 6.0
V
0.1 0.4
V
70
88 105 µmho
-10
10 mV
6.8 7.4 7.8
V
0.1 0.4
V
35
50
µA
-50 -35 µA
40
50
dB
2
4
ms
0.4 0.5 0.6
V
0
65
µA
7.94
7.02
4.18
1.05
0.73
2
kHz
0.76 0.80 0.84 V
-1.2 -1.3 -1.4
V
400
mV
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FAN4800AU/CU • Rev. 1.0.0
8
www.fairchildsemi.com
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