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ML4805 数据表 (PDF) - Micro Linear Corporation

ML4805 Datasheet PDF - Micro Linear Corporation
部件名 ML4805
下载  ML4805 下载

文件大小   152.35 Kbytes
  13 Pages
制造商  MICRO-LINEAR [Micro Linear Corporation]
网页  http://www.microlinear.com
标志 MICRO-LINEAR - Micro Linear Corporation
功能描述 Variable Feedforward PFC/PWM Controller Combo

ML4805 Datasheet (PDF)

Go To PDF Page 下载 数据表
ML4805 Datasheet PDF - Micro Linear Corporation

部件名 ML4805
下载  ML4805 Click to download

文件大小   152.35 Kbytes
  13 Pages
制造商  MICRO-LINEAR [Micro Linear Corporation]
网页  http://www.microlinear.com
标志 MICRO-LINEAR - Micro Linear Corporation
功能描述 Variable Feedforward PFC/PWM Controller Combo

ML4805 数据表 (HTML) - Micro Linear Corporation

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ML4805 产品详情

GENERAL DESCRIPTION
The ML4805 is a controller for power factor corrected, switched mode power supplies. Similar to the ML4801, the ML4805 may be used for voltage mode operation. Key features of this combined PFC and PWM controller are low start-up and operating currents. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC1000-2-3 specifications. The ML4805 includes circuits for the implementation of a leading edge, average current “boost” type power factor correction and a trailing edge pulse width modulator.
The PFC frequency of the ML4805 is automatically set at half that of the PWM frequency generated by the internal oscillator. This technique allows the user to design with smaller output components while maintaining the optimum operating frequency for the PFC. An over voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and input voltage brownout protection.

FEATURES
■ Internally synchronized PFC and PWM in one IC
■ Low start-up current (200µA typ.)
■ Low operating current (5.5mA typ.)
■ Low total harmonic distortion
■ Reduces ripple current in the storage capacitor
   between the PFC and PWM sections
■ Average current continuous boost leading edge PFC
■ High efficiency trailing edge PWM optimized for voltage mode operation
■ Current fed gain modulator for improved noise immunity
■ Brown-out control, overvoltage protection, UVLO, and soft start




类似零件编号 - ML4805

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类似说明 - ML4805

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