原标题：ADI ADP1051高效低成本400W电源参考设计

　　ADI公司的ADP1051是用于隔离式电源的带有PMBus接口的数字控制器,具有6个PWM逻辑输出,分辨率625ps,开关频率49kHz到625kHz,具有高可靠性,高效率,高集成度的特点,主要用在高密度隔离式DC/DC电源,中间总线转换器,并行电源系统和服务器,存储,工业,网络和通信基础设备.本文介绍了ADP1051主要特性,功能框图和几种典型应用电路,以及采用ADP1051的高效低成本400W电源设计主要特性,框图和主要指标,电路图,材料清单和PCB设计图.

　　The ADP1051 is an advanced digital controller with a PMBusTM interface targeting high density, high efficiency dc-to-dc power conversion. This controller implements voltage mode control with high speed, input line feedforward for enhanced transient and improved noise performance. The ADP1051 has six programmable pulse-width modulation (PWM) outputs capable of controlling most high efficiency power supply topologies, with added control of synchronous rectification (SR). The device includes adaptive dead time compensation to improve efficiency over the load range, and programmable light load mode operation, combined with low power consumption, to reduce system standby power losses.

　　The ADP1051 implements several features to enable a robust system of parallel and redundant operation for customers that require high availability or parallel connection. The device provides synchronization, reverse current protection, pre-bias startup, accurate current sharing between power supplies, and conditional overvoltage techniques to identify and safely shut down an erroneous power supply in parallel operation mode.

　　The ADP1051 is based on flexible state machine architecture and is programmed using an intuitive GUI. The easy to use interface reduces design cycle time and results in a robust, hardware coded system loaded into the built-in EEPROM. The small size (4 mm × 4 mm) LFCSP package makes the ADP1051 ideal for ultracompact, isolated dc-to-dc power module or embedded power designs.

　　ADP1051主要特性:

　　Versatile digital voltage mode controller

　　High speed input voltage feedforward control

　　6 pulse-width modulation (PWM) logic outputs with 625 ps resolution

　　Switching frequency: 49 kHz to 625 kHz

　　Frequency synchronization as master and slave device

　　Multiple energy saving modes

　　Adaptive dead time compensation for efficiency optimization

　　Low device power consumption: 100 mW typical

　　Direct parallel control for power supplies without OR’ing devices

　　Accurate droop current share

　　Pre-bias startup

　　Reverse current protection

　　Conditional overvoltage protection

　　Extensive fault detection and protection

　　PMBus compliant

　　Graphical user interface (GUI) for ease of programming

　　On-board EEPROM for programming and data storage

　　Available in a 24-lead, 4 mm × 4 mm LFCSP

　　−40℃ to +125℃ operating temperature

　　ADP1051应用:

　　High density isolated dc-to-dc power supplies

　　Intermediate bus converters

　　High availability parallel power systems

　　Server, storage, industrial, networking, and communications infrastructure

　　图1. ADP1051功能框图

　　图2. ADP1051典型应用电路图

　　图3. ADP1051全桥转换器电路图

　　图4. ADP1051半桥转换器电路图

　　图5. ADP1051主动钳位正向转换器电路图

　　400W降压电流馈入推挽电源参考设计主要特性:

　　图6.400W降压电流馈入推挽电源参考设计框图

　　图7.400W降压电流馈入推挽电源参考设计外形图

　　400W降压电流馈入推挽电源参考设计主要指标:

　　400W降压电流馈入推挽电源参考设计材料清单: