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參數(shù)資料
| 型號： | FAN7930CM |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 18/22頁 |
| 文件大?。?/td> | 1725K |
| 描述： | IC PFC CTLR CRITICAL CONF 8-SOIC |
| 標準包裝： | 95 |
| 模式： | 臨界傳導（CRM） |
| 頻率 - 開關： | 250kHz ~ 350kHz |
| 電流 - 啟動： | 120µA |
| 電源電壓： | 13 V ~ 20 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOP |
| 包裝： | 管件 |
?2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7930C " Rev. 1.0.2
18
Typical Application Circuit
Application
Device
Input Voltage
Range
Rated Output
Power
Output Voltage
(Maximum Current)
LCD TV Power Supply FAN7930C
90-265 V
AC
195 W
390 V (0.5 A)
Features
? Average efficiency of 25%, 50%, 75%, and 100% load conditions is higher than 95% at universal input.
? Power factor at rated load is higher than 0.98 at universal input.
? Total Harmonic Distortion (THD) at rated load is lower than 15% at universal input.
Key Design Notes
? When auxiliary V
CC
supply is not available, V
CC
power can be supplied through Zero Current Detect (ZCD)
winding. The power consumption of R103 is quite high, so its power rating needs checking.
? Because the input bias current of INV pin is almost zero, output voltage sensing resistors (R112~R115) should
be as high as possible. However, too-high resistance makes the node susceptible to noise. Resistor values need
to strike a balance between power consumption and noise immunity.
? Quick charge diode (D106) can be eliminated if output diode inrush current capability is sufficient. Even without
D106, system operation is normal due to the controllers highly reliable protection features.
Schematic
Z N R 1 0 1
,1 0 D 4 7 1
1 9 4 ?H , 3 9 :5
D 1 0 5
6 0 0 V 8 A
V AU X
DC O U T P U T
Q 1 0 1
F C P F
2 0 N 6 0
D 1 0 6
6 0 0 V 3 A
R 1 0 1 ,1 M -
J
C 1 0 1 ,
2 2 0 n F
C 1 1 4
,2 .2 n
F
C 1 0 2 ,
6 8 0 n F
B D 1 0 1 ,
6 0 0 V ,1 5 A
R 1 0 9
4 7
R 1 0 8
4 .7
D 1 0 3 ,1 N 4 1 4
8
L P 1 0 1 ,E E R 3 0 1 9 N
1
7
6
8
5
2
C o m p
IN V
V
CC O u t
G N D
Z C D
C S
R D Y
4
3
C 1 1 5
,2 .2 n
F
R 1 0 3 ,
1 0 k ,1 W
D 1 0 2 ,
U F 4 0 0 4
C 1 0 4 ,
1 2 n F
C irc u it fo r V
C C
. If e x te rn a l V
C C
is u s e d , th is c irc u it is n o t n e e d e d .
V
C C
fo r a n o th e r p o w e r s ta g e
C irc u it fo r V
C C
fo r a n o th e r p o w e r s ta g e th u s c o m p o n e n ts s tru c tu re a n d v a lu e s m a y v a ry .
O p tio n a l
Figure 45. Demonstration Circuit
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| FAN7930CMX | 功能描述:功率因數(shù)校正 IC Critical Conduction Mode PFC Controller RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| FAN7930CMX_G | 制造商:Fairchild Semiconductor Corporation 功能描述:IC PFC CTLR CRITICAL CONF 8-SOIC 制造商:Fairchild Semiconductor Corporation 功能描述:Power Factor Correction - PFC Critical Conduction Mode PFC Controller 制造商:Fairchild Semiconductor Corporation 功能描述:Critical Conduction Mode PFC Controller |
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