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基于ADI的ADP1055隔离式DC-DC电源解决方案

来源：中电网

2018-12-17

类别：电源管理

374

拍明

原标题：ADI ADP1055隔离式DC-DC电源解决方案

　　ADI公司的ADP1055是灵活,功能丰富的数字副边控制器,包括差分远程电压检测,原边和副边电流检测,脉宽调制(PWM)产生,频率同步,冗余OVP和均流等功能,并集成了控制环路数字滤波器和补偿功能,可通过PMBus接口编程.保护功能包括过流保护(OCP),过压保护(OVP),欠压闭锁(UVLO)和外部过温保护(OTP).3.3 V单电源供电.主要用在隔离式DC-DC电源和模块以及冗余电源系统.本文介绍了ADP1055主要特性,框图,典型应用电路图以及评估板ADP1055-EVALZ和子板ADP1055DC1-EVALZ主要特性,电路图,材料清单和PCB设计图.

　　The ADP1055 is a flexible, feature-rich digital secondary side controller that targets ac-to-dc and isolated dc-to-dc secondary side applications. The ADP1055 is optimized for minimal component count, maximum flexibility, and minimum design time. Features include differential remote voltage sense, primary and secondary side current sense, pulse-width modulation (PWM) generation, frequency synchronization, redundant OVP, and current sharing. The control loop digital filter and compensation terms are integrated and can be programmed over the PMBus™ interface. Programmable protection features include overcurrent (OCP), overvoltage (OVP) limiting, undervoltage lockout (UVLO), and external overtemperature (OTP). The built-in EEPROM provides extensive programming of the integrated loop filter, PWM signal timing, inrush current, and soft start timing and sequencing. Reliability is improved through a built-in checksum and programmable protection circuits. A comprehensive GUI is provided for easy design of loop filter characteristics and programming of the safety features. The industry-standard PMBus provides access to the many monitoring and system test functions. The ADP1055 is available in a 32-lead LFCSP and operates from a single 3.3 V supply.

　　ADP1055主要特性:

　　−40℃ to +125℃ operation

　　PMBus Revision 1.2 compliant with PEC and extended manufacturer specific commands

　　32-bit password protection with command masking

　　64 address selections (16 base addresses, expandable to 64)

　　6 PWM control signals, 625 ps resolution

　　Frequency from 48 kHz to 1 MHz

　　Duty cycle double update rate

　　Digital control loop (PID + additional pole or zero configurability)

　　Programmable loop filters (CCM, DCM, low/normal temperature)

　　Fast line voltage feedforward

　　Adaptive dead time compensation for improved efficiency

　　Remote voltage sense

　　Redundant programmable OVP

　　Current sense

　　Primary side cycle-by-cycle fast protection

　　Secondary side cycle-by-cycle fast overcurrent protection

　　Secondary side averaged reverse current protection using diode emulation mode with fixed debounce Synchronous rectifier control for improved efficiency in light load mode

　　Nonlinear gain for faster transient response from DCM to CCM

　　Frequency synchronization

　　Soft start and soft stop functionality

　　Average and peak constant current mode

　　External PN junction temperature sensing

　　4 GPIOs (2 GPIOs configurable as active clamp snubber PWMs)

　　Extended black box data recorder for fault recording

　　User trimming on input and output voltages and currents

　　Digital current sharing

　　ADP1055应用:

　　Isolated dc-to-dc power supplies and modules

　　Redundant power supply systems

　　图1.ADP1055框图

　　图2.ADP1055典型应用电路图

　　评估板ADP1055-EVALZ

　　This evaluation board, together with a daughter card, allows you to evaluate the ADP1055 as a power supply application. With the USB to I2C connector, and the graphical user interface (GUI),the ADP1055 on the evaluation board can be interfaced with a PC via a USB port. The evaluation board is set up to act as an isolated PSU with a rated load of 12 V, 20 A from a 38 V dc to 60 V dc source. Connectors on the evaluation board provide synchronization, as well as share bus and PMBus™ interfaces, allowing direct parallel evaluation when multiple evaluation boards are connected in parallel to a common bus. Multiple test points allow easy access to all critical points/pins.

　　评估板ADP1055-EVALZ主要特性:

　　Full support evaluation kit for the ADP1055

　　240 W full bridge topology (adjustable to phase shifted full bridge topology)

　　Rated power of 12V dc, 20A