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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LM5025AMTC 데이터시트(PDF) 1 Page - National Semiconductor (TI) |
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LM5025AMTC 데이터시트(HTML) 1 Page - National Semiconductor (TI) |
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1 / 16 page  LM5025A Active Clamp Voltage Mode PWM Controller General Description The LM5025A is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025A are: The CS1 and CS2 current limit thresholds have been increased to 0.5V. The internal CS2 filter dis- charge device has been disabled and no longer operates each clock cycle. The internal V CC and VREF regulators continue to operate when the line UVLO pin is below thresh- old. The LM5025A PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be real- ized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The two internal compound gate drivers parallel both MOS and Bipolar devices, providing superior gate drive characteristics. This controller is de- signed for high-speed operation including an oscillator fre- quency range up to 1MHz and total PWM and current sense propagation delays less than 100ns. The LM5025A includes a high-voltage start-up regulator that operates over a wide input range of 13V to 90V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/ DOWN sync capability, precision reference and thermal shutdown. Features n Internal Start-up Bias Regulator n 3A Compound Main Gate Driver n Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis n Voltage Mode Control with Feed-Forward n Adjustable Dual Mode Over-Current Protection n Programmable Overlap or Deadtime between the Main and Active Clamp Outputs n Volt x Second Clamp n Programmable Soft-start n Leading Edge Blanking n Single Resistor Programmable Oscillator n Oscillator UP / DOWN Sync Capability n Precision 5V Reference n Thermal Shutdown Packages n TSSOP-16 n LLP-16 (5x5 mm) Thermally Enhanced Typical Application Circuit 20107401 Simplified Active Clamp Forward Power Converter December 2004 © 2004 National Semiconductor Corporation DS201074 www.national.com |
유사한 부품 번호 - LM5025AMTC |
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유사한 설명 - LM5025AMTC |
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