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參數(shù)資料
| 型號(hào)： | FAN4803 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 8-Pin PFC and PWM Controller Combo |
| 中文描述： | 8引腳PFC和PWM組合控制器 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 103K |
| 代理商： | FAN4803 |
www.fairchildsemi.com
REV. 1.2.3 11/2/04
Features
Internally synchronized PFC and PWM in one 8-pin IC
Patented one-pin voltage error amplifier with advanced
input current shaping technique
Peak or average current, continuous boost, leading edge
PFC (Input Current Shaping Technology)
High efficiency trailing-edge current mode PWM
Low supply currents; start-up: 150μA typ., operating:
2mA typ.
Synchronized leading and trailing edge modulation
Reduces ripple current in the storage capacitor between
the PFC and PWM sections
Overvoltage, UVLO, and brownout protection
PFC V
CC
OVP with PFC Soft Start
General Description
The FAN4803 is a space-saving controller for power factor
corrected, switched mode power supplies that offers very
low start-up and operating currents.
Power Factor Correction (PFC) offers the use of smaller, lower
cost bulk capacitors, reduces power line loading and stress on
the switching FETs, and results in a power supply fully compli-
ant to IEC1000-3-2 specifications. The FAN4803 includes
circuits for the implementation of a leading edge, average
current “boost” type PFC and a trailing edge, PWM.
The FAN4803-1’s PFC and PWM operate at the same
frequency, 67kHz. The PFC frequency of the FAN4803-2 is
automatically set at half that of the 134kHz PWM. This
higher frequency allows the user to design with smaller
PWM components while maintaining the optimum operating
frequency for the PFC. An overvoltage comparator shuts
down the PFC section in the event of a sudden decrease in
load. The PFC section also includes peak current limiting for
enhanced system reliability.
Block Diagram
ISENSE
3
VEAO
4
VDC
5
ILIMIT
6
GND
2
PWM OUT
8
PFC OUT
1
–
COMP
+
–
COMP
+
35
μ
A
16.2V
17.5V
VCC
+
COMP
–
+
–
–1V
SOFT START
PFC/PWM UVLO
DUTY CYCLE
LIMIT
OSCILLATOR
PFC – 67kHz
VREF
VREF
1.2V
26k
40k
M1
R1
C1
30pF
M2
M7
M3
M4
M6
PWM
CONTROL
LOGIC
–
+
1.5V
DC ILIMIT
PFC ILIMIT
PWM COMPARATOR
VCC OVP
COMP
PFC OFF
COMP
ONE PIN ERROR AMPLIFIER
LEADING
EDGE PFC
TRAILING
EDGE PWM
+
–
7V
+
–
–1
–4
REF
VCC
7
PFC
CONTROL
LOGIC
FAN4803
8-Pin PFC and PWM Controller Combo
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN4810 | Power Factor Correction Controller |
| FAN4810M | Power Factor Correction Controller |
| FAN4810MX | Power Factor Correction Controller |
| FAN4810N | Terminal Block RoHS Compliant: Yes |
| FAN4822 | ZVS Average Current PFC Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN4803CP1 | 功能描述:功率因數(shù)校正 IC PFC/PWM Controller Combo RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| FAN4803CP-1 | 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:8-Pin PFC and PWM Controller Combo |
| FAN4803CP1_Q | 功能描述:功率因數(shù)校正 IC PFC/PWM Controller Combo RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| FAN4803CP2 | 功能描述:功率因數(shù)校正 IC PFC/PWM Controller Combo RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| FAN4803CP-2 | 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:8-Pin PFC and PWM Controller Combo |
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