參數(shù)資料
型號: FAN4800ASNY
廠商: Fairchild Semiconductor
文件頁數(shù): 6/19頁
文件大?。?/td> 860K
描述: IC CTLR COMBO PFC/PWM 16-DIP
標(biāo)準(zhǔn)包裝: 30
模式: 平均電流
頻率 - 開關(guān): 240kHz ~ 268kHz
電流 - 啟動: 30µA
電源電壓: 11 V ~ 26 V
工作溫度: -40°C ~ 105°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 16-DIP
包裝: 管件
 
?2010 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FAN4800AS/CS/01S/02S " Rev. 1.0.2
6
Pin Configuration
 
Figure 7.
Pin Configuration (Top View)
Pin Definitions
Pin #     Name    Description
1
IEA
Output of PFC Current Amplifier. The signal from this pin is compared with an internal 
sawtooth to determine the pulse width for PFC gate drive. 
2
IAC
Input AC Current. For normal operation, this input provides current reference for the multiplier. 
The suggested maximum IAC is 100 礎(chǔ). 
3
ISENSE
PFC Current Sense. The non-inverting input of the PFC current amplifier and the output of 
multiplier and PFC ILIMIT comparator. 
4
VRMS     Line-Voltage Detection. The pin is used for the PFC multiplier. 
5
SS
PWM Soft-Start. During startup, the SS pin charges an external capacitor with a 10 ?/SPAN>A 
constant current source. The voltage on FBPWM is clamped by SS during startup. If a
protection condition occurs and/or PWM is disabled, the SS pin is quickly discharged.
6
FBPWM    PWM Feedback Input. The control input for voltage-loop feedback of PWM stage. 
7
RT/CT     Oscillator RC Timing Connection. Oscillator timing node; timing set by R
T
 and C
T
. 
8
RAMP
PWM RAMP Input. In current mode, this pin functions as the current-sense input; when in 
voltage mode, it is the feedforward sense input from PFC output 380 V (feedforward ramp). 
9
ILIMIT
Peak Current Limit Setting for PWM. The peak current limits setting for PWM.
10
GND
Ground.
11
OPWM
PWM Gate Drive. The totem-pole output drive for PWM MOSFET. This pin is internally 
clamped under 19 V to protect the MOSFET. 
12
OPFC
PFC Gate Drive. The totem-pole output drive for PFC MOSFET. This pin is internally clamped 
under 15 V to protect the MOSFET. 
13
VDD
Supply. The power supply pin. The threshold voltages for startup and turn-off are 11 V and 
9.3 V, respectively. The operating current is lower than 10 mA. 
14
VREF
Reference Voltage. Buffered output for the internal 7.5 V reference.
15
FBPFC
Voltage Feedback Input for PFC. The feedback input for PFC voltage loop. The inverting input 
of PFC error amplifier. This pin is connected to the PFC output through a divider network. 
16
VEA
Output of PFC Voltage Amplifier. The error amplifier output for PFC voltage feedback loop.  
A compensation network is connected between this pin and ground. 
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