收藏本站
January 2014
?2010 Fairchild Semiconductor Corporation
 
www.fairchildsemi.com
FAN4800AS/CS/01S/02S " Rev. 1.0.2
FAN4800AS/CS/01S/2S
PFC/PWM Controller Combination
 
Features
?   Pin-to-Pin Compatible with ML4800 and FAN4800 
and CM6800 and CM6800A
?   PWM Configurable for Current Mode or 
Feedforward Voltage-Mode Operation
?   Internally Synchronized Leading-Edge PFC and 
Trailing-Edge PWM in One IC
?   Low Operating Current 
?   Innovative Switching-Charge Multiplier Divider 
?   Average-Current Mode for Input-Current Shaping 
?   PFC Over-Voltage and Under-Voltage Protections 
?   PFC Feedback Open-Loop Protection 
?   Cycle-by-Cycle Current Limiting for PFC/PWM 
?   Power-on Sequence Control and Soft-Start 
?   Brownout Protection 
?   Interleaved PFC/PWM Switching 
?   Improved Efficiency at Light Load 
?   f
RTCT
=4"f
PFC
=4"f
PWM
 for FAN4800AS/01S
?   f
RTCT
=4"f
PFC
=2"f
PWM
 for FAN4800CS/02S
Applications
?   Desktop PC Power Supply 
?   Internet Server Power Supply 
?   LCD TV, Monitor Power Supply 
?   UPS 
?   Battery Charger 
?   DC Motor Power Supply 
?   Monitor Power Supply 
?   Telecom System Power Supply 
?   Distributed Power 
Related Resources
?   AN-8027 - FAN480X PFC+PWM Combination 
Controller Application
  
Description
The highly integrated FAN4800AS/CS/01S/02S parts
are specially designed for power supplies that consist of
boost PFC and PWM. They require very few external
components    to    achieve    versatile    protections    /
compensation. They are available in 16-pin DIP and
SOP packages.
The PWM can be used in either current or voltage
mode. In voltage mode, feed-forward from the PFC
output bus can reduce the secondary output ripple.
Compared    with    older    productions,    ML4800    and
FAN4800,     FAN4800AS/CS/01S/02S     have     lower
operation current that saves power consumption in
external    devices.    FAN4800AS/CS/01S/02S    have
accurate 49.9% maximum duty of PWM that makes the
hold-up time longer. Brownout protection and PFC soft-
start functions available in this series are not available in
ML4800 and FAN4800.
To   evaluate   FAN4800AS/CS/01S/02S   for   replacing
existing FAN4800 and ML4800 boards, five things must
be completed before the fine-tuning procedure:
1.    Change R
AC
 resister from the old value to a higher
resister: between 6 M?to 8 M?
2.    Change RT/CT pin from the existing values to
R
T
=6.8k? and C
T
=1000 pF to have f
PFC
=64 kHz
and f
PWM
=64 kHz.
3.    The VRMS pin needs to be 1.224 V at V
IN
=85 V
AC
 
for universal input application from line input from
85 V
AC
 to 270 V
AC
.
4.    At full load, the average V
VEA
  needs to be ~4.5 V
and the ripple of V
VEA
  needs to be less than
400 mV.
5.    For the Soft-Start pin, the soft-start current has
been reduced to half the FAN4800 capacitor.
There are two differences from FAN4800A/C/01/02 to
FAN4800AS/CS/01S/02S:
1.    Under-voltage    protection    debounce    time    is
extended to one second.
2.    PWM gate clamp voltage is raised to 19 V.
 
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
FAN4800AUN IC PWM/PFC CTLR COMBO 16-MDIP
FAN4800CUN IC PWM/PFC CTLR COMBO 16-MDIP
FAN4802MY IC PFC CTRLR AVERAGE CURR 16SOP
FAN4802SNY IC CTLR PFC/PWM COMBO 16-PDIP
FAN6920MRMY IC PWM CTLR PFC/QUASI-RES 16SOP
FAN6921MLMY IC CTLR PFC/FLYBACK 16-SOICN
FAN6921MRMY IC CTLR PFC/FLYBACK 16-SOICN
FAN6961SZ IC PFC CONTROLLER DCM 8SOP
相关代理商/技术参数
FAN4800AU 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PFC/ PWM Controller Combination
FAN4800AUM 功能描述:电流型 PWM 控制器 PFC + PWM Controller Combo RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
FAN4800AUN 功能描述:电流型 PWM 控制器 PFC + PWM Controller Combo RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
FAN4800C 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PFC/PWM Controller Combination
FAN4800CMY 功能描述:电流型 PWM 控制器 PWM/PFC, Avg Curr 30uA SU, 2.6mA Op RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
FAN4800CNY 功能描述:电流型 PWM 控制器 PWM/PFC, Avg Curr 30uA SU, 2.6mA Op RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
FAN4800CS 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:PFC/PWM Controller Combination
FAN4800CSMY 功能描述:电流型 PWM 控制器 PFC/PWM Controller Combination RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14