LM5025C - 有源钳位电压模式 PWM 控制器

LM5025C是TI德州仪器公司的一款PWM与谐振控制器产品，LM5025C是有源钳位电压模式 PWM 控制器，本站介绍了LM5025C的封装应用图解、特点和优点、功能等，并给出了与LM5025C相关的TI元器件型号供参考。

LM5025C - 有源钳位电压模式 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The LM5025C is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025C are: The maximum duty cycle of the LM5025C is increased from 80% to 91%. The soft-start capacitor charging current is increased from 20 µA to 90 µA. The VCC regulator current limit threshold is increased from 25 mA to 55 mA. The CS1 and CS2 current limit thresholds have been increased to 0.5V. The internal CS2 filter discharge device has been disabled and no longer operates each clock cycle. The internal VCC and VREF regulators continue to operate when the line UVLO pin is below threshold.

The LM5025C 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 realized 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 designed for high-speed operation including an oscillator frequency range up to 1MHz and total PWM and current sense propagation delays less than 100 ns. The LM5025C 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.

产品特性

Internal Start-Up Bias Regulator
3A Compound Main Gate Driver
Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
Voltage Mode Control with Feed-Forward
Adjustable Dual Mode Over-Current Protection
Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
Volt x Second Clamp
Programmable Soft-start
Leading Edge Blanking
Single Resistor Programmable Oscillator
Oscillator UP / DOWN Sync Capability
Precision 5V Reference
Thermal Shutdown

Package

TSSOP-16

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