LM5025
- Internal Start-Up Bias Regulator
- 3-A Compound Main Gate Driver
- Programmable Line Undervoltage Lockout (UVLO)
With Adjustable Hysteresis - Voltage Mode Control With Feed-Forward
- Adjustable Dual-Mode Overcurrent Protection
- Programmable Overlap or Deadtime Between the
Main and Active Clamp Outputs - Volt × Second Clamp
- Programmable Soft-Start
- Leading Edge Blanking
- Single Resistor Programmable Oscillator
- Oscillator UP and DOWN Sync Capability
- Precision 5-V Reference
- Thermal Shutdown
The LM5025 PWM controller contains all of the features necessary to implement power converters using the active clamp and reset technique. The device can be configured to control either a P-channel clamp switch or an N-channel clamp switch. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques.
Two control outputs are provided, the main power switch control (OUT_A), and the active clamp switch control (OUT_B). The active clamp output can be configured for either a specified overlap time (for P-channel switch applications) or a specified deadtime (for N_channel applications). 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 1 MHz and total PWM and current sense propagation delays less than 100 ns.
The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft-start, oscillator UP and DOWN sync capability, precision reference and thermal shutdown.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM5025 Active Clamp Voltage Mode PWM Controller 数据表 (Rev. C) | PDF | HTML | 2016-1-14 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 技术文章 | Power Tips: A simple circuit to implement smooth soft start for an isolated conver | PDF | HTML | 2017-5-1 | |||
| 用户指南 | LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide | 2012-1-27 | ||||
| 应用手册 | Operation and Benefits of Active-Clamp Forward Power Converters | 2007-3-22 | ||||
| 用户指南 | Application Note 1542 LM5115A Evaluation Board (cn) | 2007-3-17 | ||||
| 白皮书 | PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design | 2005-10-1 | ||||
| 应用手册 | Active Clamp Transformer Reset: High Side or Low Side? | 2004-9-17 | ||||
| 更多文献资料 | Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset | 2001-2-15 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| WSON (NHQ) | 16 | Ultra Librarian |
订购和质量
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