参数资料
型号: FAN4800AMY
厂商: Fairchild Semiconductor
文件页数: 7/24页
文件大小: 931K
描述: IC PFC CONTROLLER CCM/DCM 16SOIC
标准包装: 1
模式: 连续导电(CCM),间歇导电(DCM)
频率 - 开关: 66kHz ~ 84kHz
电流 - 启动: 100µA
电源电压: 11 V ~ 16.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 标准包装
其它名称: FAN4800AMYDKR
 
?2008 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FAN4800A/C, FAN4801/02/02L " Rev. 1.0.3
7
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. 
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. Line voltage detection. The pin is used for 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. In the event of a
protection condition occurring and/or PWM 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 feed forward sense input from PFC output 380V (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 15V to protect the MOSFET. 
12
OPFC
PFC Gate Drive. The totem pole output drive for PWM MOSFET. This pin is internally clamped 
under 15V to protect the MOSFET. 
13
VDD
Supply. The power supply pin. The threshold voltages for startup and turn-off are 11V and 
9.3V, respectively. The operating current is lower than 10mA. 
14
VREF
Reference Voltage. Buffered output for the internal 7.5V 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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