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FAN6791 PDF预览

FAN6791

更新时间： 2024-01-07 17:01:10
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 控制器
页数 文件大小 规格书
19页 718K
描述
Highly Integrated, Dual-PWM Combination Controller

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FAN6791 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete包装说明：GREEN, MS-001BB, DIP-16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.31.00.01风险等级：5.64
Is Samacsys：N模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：22 V最小输入电压：11 V
标称输入电压：18 VJESD-30 代码：R-PDIP-T16
JESD-609代码：e3长度：19.17 mm
功能数量：1端子数量：16
最高工作温度：105 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：5.33 mm表面贴装：NO
切换器配置：SINGLE最大切换频率：68 kHz
技术：CMOS温度等级：INDUSTRIAL
端子面层：MATTE TIN端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.62 mm
Base Number Matches：1

FAN6791 数据手册

 浏览型号FAN6791的Datasheet PDF文件第2页浏览型号FAN6791的Datasheet PDF文件第3页浏览型号FAN6791的Datasheet PDF文件第4页浏览型号FAN6791的Datasheet PDF文件第5页浏览型号FAN6791的Datasheet PDF文件第6页浏览型号FAN6791的Datasheet PDF文件第7页 
April 2009  
FAN6791 / FAN6793  
Highly Integrated, Dual-PWM Combination Controller  
Features  
Description  
The highly integrated FAN6791/3 dual PWM  
combination controller provides several features to  
enhance the performance of converters.  
ƒ High-Voltage Startup  
ƒ Low Operating Current  
ƒ Interleaved Stand-by PWM / Forward PWM Switching  
ƒ Green Mode Stand-by PWM / Forward PWM  
To minimize standby power consumption, a proprietary  
green-mode function provides off-time modulation to  
linearly decrease the switching frequency at light-load  
conditions. To avoid acoustic-noise problems, the  
minimum PWM frequency is set above 20KHz. This  
green-mode function enables the power supply to meet  
international power conservation requirements. With the  
internal high-voltage startup circuitry, the power loss  
due to bleeding resistors is also eliminated. To further  
ƒ Linearly Decreasing Stand-by PWM Frequency to  
20kHz  
ƒ Remote On / Off  
ƒ AC Brownout Protection  
ƒ Forward PWM with Soft-Start  
ƒ Frequency Hopping to Reduce EMI Emissions  
reduce  
power  
consumption,  
FAN6791/3  
is  
manufactured using the CMOS process, which allows  
an operating current of only 6mA.  
ƒ Cycle-by-Cycle Current Limiting for Stand-by PWM /  
Forward PWM  
FAN6791/3 integrates  
a frequency-jittering function  
internally to reduce EMI emissions of a power supply  
with minimum line filters. The built-in synchronized slope  
compensation achieves stable peak-current-mode  
control. The proprietary internal line compensation  
ensures constant output power limit.  
ƒ Leading-Edge Blanking for Stand-by PWM / Forward  
PWM  
ƒ Synchronized Slope Compensation for Stand-by  
PWM / Forward PWM  
ƒ GATE Output Maximum Voltage Clamp  
ƒ VDD Over-Voltage Protection (OVP)  
ƒ VDD Under-Voltage Lockout (UVLO)  
FAN6791/3 provides many protection functions,  
including brownout protection, cycle-by-cycle current  
limiting, and an internal open-loop protection circuit to  
ensure safety should an open-loop or output short-  
circuit failure occur. PWM output is disabled until VDD  
drops below the UVLO lower limit when the controller  
restarts. As long as VDD exceeds ~24.5V, the internal  
OVP circuit is triggered.  
ƒ Internal Open-Loop Protection for Stand-by PWM /  
Forward PWM  
ƒ Constant Power Limit for Stand-by PWM / Forward  
PWM  
Applications  
General-purpose switch-mode power supplies and  
flyback power converters, including:  
ƒ PC-ATX Power Supplies  
© 2008 Fairchild Semiconductor Corporation  
FAN6791 / FAN6793 • Rev. 1.0.2  
www.fairchildsemi.com  
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