ADM1266电源完整监控和排序解决方案

电子工程师 2019-05-01 2346

电源设计应用

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描述

　　ADI公司的ADM1266是具有具裕量控制和故障记录功能的可级联超级时序控制器，适用于多达 17个电源的完整监控和排序解决方案，通过专用的二线接口，多达16个ADM1266 IC可以扩展到 257个电源，具有完全可编程的排序引擎，可实现电源的实时监控，可兼容行业标准 PMBus 接口。主要用在通信基础设备和工业测试与测量。本文介绍了ADM1266主要特性，功能框图和详细框图，以及评估板ADM1266-EVALZ主要特性，主要元件分布和电路图，材料清单和PCB丝印图。

　　The ADM1266 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in systems with up to 17 supplies. For systems with more supplies （up to 257）， the operation of up to 16 ADM1266 devices can be synchronized through a proprietary 2-wire interface （interdevice bus）。 The sequencing engine （SE） monitors the supply fault detectors （SFDs）， programmable driver input/outputs （PDIOs）， general- purpose inputs/outputs （GPIOs）， and timers， and controls the PDIOs and GPIOs to sequence the supplies up and down as required. The logical core of the device is an ARM® Cortex-M3 microcontroller. The firmware is supplied by Analog Devices， Inc.， and all configuration is performed through an intuitive graphic user interface （GUI）。 Additionally， the ADM1266 integrates an analog-to-digital converter （ADC） and voltage output digital-to-analog converters （DACs） that can be used to adjust either the feedback node or reference of a dc-to-dc converter to implement a closed-loop， autonomous， margining system. A block of nonvolatile EEPROM is available to record voltage， time， and fault information when instructed to by the sequencing engine configuration.

　　ADM1266主要特性：

　　Complete supervisory and sequencing solution for up to 17 supplies

　　Expandable to 257 supplies with additional ADM1266 ICs connected to the 2-wire interdevice bus

　　Fully programmable sequencing engine

　　17 supply fault detectors enable real time supervision of supplies

　　0.4 V to 15 V on VH1 to VH4 （VHx）

　　0.4 V to 5 V on VP1 to VP13 （VPx）

　　Device powered by the higher of VH1 and VH2 inputs for improved operating redundancy

　　12-bit ADC for readback of all supervised voltages

　　Black box nonvolatile fault recording

　　16 PDIOs

　　9 GPIOs

　　9 voltage output 8-bit DACs allow voltage margining adjustment via dc-to-dc converter trim/feedback node

　　Main and backup memory

　　Industry standard PMBus interface compliant

　　Available in a 9 mm × 9 mm， 64-lead package

　　ADM1266应用：

　　Communications infrastructure

　　Industrial test and measurement

　　图1. ADM1266功能框图

　　图2. ADM1266详细功能框图

　　评估板ADM1266-EVALZ

　　The ADM1266-EVALZ is a demonstration system for the ADM1266 16-channel， I2C/SMBus/PMBus Super Sequencer®。 The ADM1266 monitors and controls 16 power supply rails. The ADM1266-EVALZ demonstrates the ability of the ADM1266 to sequence， trim， margin， supervise， monitor， and log faults for these 16 power supply rails. The output voltage of each power supply channel is monitored by the ADM1266. The ADM1266-EVALZ is a single-circuit board containing 14 ADP1710 150 mA linear regulators and two ADP7102 300 mA linear regulators. Each linear regulator is controlled by the ADM1266. The ADM1266-EVALZ provides a sophisticated， 16-channel， digitally programmable power supply system. The ADM1266-EVALZ demonstration system is supported by the Analog Devices Power Studio™ graphical user interface （GUI）， enabling complete control of all features of the ADM1266. Together， the Power Studio software and the ADM1266-EVALZ hardware system create a powerful development environment for designing and testing ADM1266 configuration settings. These settings can be stored in the internal EEPROM of the device， or the settings can be stored in a file. This file can be later used to order pre-programmed devices or to program devices in a production environment. The software displays all the configuration settings and real-time measurements from the ADM1266. Telemetry allows easy access and decoding of the fault log created by the ADM1266. The board is preprogrammed with the EEPROM values appropriate for the 16 power supplies used on the ADM1266-EVALZ. Multiple ADM1266-EVALZ boards can be cascaded together to form a high channel count power supply （see the Multiple Board Setup section）。 This cascaded configuration demonstrates the features of the ADM1266 that enable sequencing and fault information to be shared across multiple ICs. The user can configure up to 16 ADM1266-EVALZ boards， thereby controlling up to 256 separate power supply rails. Larger arrays of ADM1266 devices are supported through the programmable I2C base address. The ADM1266-EVALZ demonstration board can be powered by an external power supply， such as a 12 V dc supply. Communication with the software is provided through the EVAL-ADP-I2C-USB.

　　评估板ADM1266-EVALZ主要特性：

　　Sequencing and supervision of 16 power supplies

　　Trim and margin functions for 9 power supplies

　　Automatic fault logging to internal EEPROM

　　Operates autonomously without additional software

　　PMBus interface supports all device related software

　　Interchip bus simplifies multidevice cascading and sequencing operation

　　16 voltage references for input emulation

　　Switches and LEDs for signal emulation using GPIOs

　　评估板ADM1266-EVALZ 包括：

　　ADM1266 main evaluation board

　　ADM1266 POL evaluation board