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ADI LTM4700数字电源系统管理双通道50AμModule稳压器解决方案

ADI公司的LTM4700是具有数字电源系统管理功能的双通道 50A 或单通道 100A µModule 稳压器,输入电压4.5V-16V,输出电压0.5V-18V,100A从输入12VIN到1VOUT满负载效率~90%,温度范围内最大DC输出误差±0.5%,25℃ 到125℃电流精度±3%,器件还集成输入电流检测放大器,400kHz PMBus兼容的I2C串行接口,主要用在系统优化,特怔和数据挖掘,原型,生产和现场环境,通信,数据和存储系统.本文介绍了LTM4700主要特性,框图和多种应用电路,以及演示电路DC2702A-A主要特性,电路图和材料清单.

The LTM®4700 is a dual 50A or single 100A step-downμModule® (power module) DC/DC regulator featuringremote configurability and telemetry-monitoring of powermanagement parameters over PMBus— an open standardI2C-based digital interface protocol. The LTM4700 iscomprised of fast analog control loops, precision mixedsignal circuitry, EEPROM, power MOSFETs, inductors andsupporting components. The LTM4700 product video isavailable on website.

The LTM4700’s 2-wire serial interface allows outputs tobe margined, tuned and ramped up and down at programmableslew rates with sequencing delay times. Input andoutput currents and voltages, output power, temperatures,uptime and peak values are readable. Custom configurationof the EEPROM contents is not required. At start-up,output voltages, switching frequency, and channel phaseangle as-signments can be set by pin-strapping resistors.

The LTpowerPlay® GUI and DC1613 USB-to-PMBus converterand demo kits are available.The LTM4700 is offered in a 15mm × 22mm × 7.87mmBGA package available with SnPb or RoHS compliantterminal finish.

LTM4700主要特性:

Dual 50A or Single 100A Digitally Adjustable Outputs withDigital Interface for Control, Compensation and Monitoring
Wide Input Voltage: 4.5V to 16V
Output Voltage Range: 0.5V to 1.8V
~90% Full Load Efficiency from 12VIN to 1VOUT at 100A
±0.5% Maximum DC Output Error Over Temperature
±3% Current Readback Accuracy (25℃to 125℃)
Integrated Input Current Sense Amplifier
400kHz PMBus-Compliant I2C Serial Interface
Supports Telemetry Polling Rates Up to 125Hz
Integrated 16-Bit ΔΣ ADC
Constant Frequency Current Mode Control
Parallel and Current Share Multiple Modules
15mm × 22mm × 7.87mm BGA Package
Readable Data:
Input and Output Voltages, Currents, and Temperatures
Running Peak Values, Uptime, Faults and Warnings
Internal EEPROM and Fault Logging with ECC
Writable Data and Configurable Parameters:
Output Voltage, Voltage Sequencing and Margining
Digital Soft-Start/Stop Ramp
Optimize Analog Loop Compensation
OV/UV/OT, UVLO, Frequency and Phasing

LTM4700应用:

System Optimization, Characterization and Data Mining
in Prototype, Production and Field Environments
Telecom, Datacom, and Storage Systems

图1.LTM4700简化框图

图2.LTM4700功能框图

图3.测试电路1:LTM4700高VIN工作范围配置:5.75V ≤ VIN ≤ 16V

图4.测试电路2:LTM4700低VIN工作范围配置:4.5V ≤ VIN ≤ 5.75V

图5.LTM4700应用电路:50A时输出1.0V和1.5V,提供 I2C/SMBus/PMBus串联接口

图6.LTM4700应用电路:50A时4.5V-5.75V输入,
输出0.8V和1.2V,提供 I2C/SMBus/PMBus串联接口

图7.两个LTM4700并联应用电路:200A时输出1.0V.
在两线I2C/SMBus/PMBus串联接口上集成功率系统管理特性

图8.LTM4700应用电路:3.3V输入,输出1Vout和1.2Vout,
输出高达50A,在两线I2C/SMBus/PMBus串联接口上集成功率系统管理特性

图9.四个LTM4700八相工作应用电路:400A时输出1.0V.
在两线I2C/SMBus/PMBus串联接口上集成功率系统管理特性

演示电路DC2702A-A

Demonstration circuit 2702A-A is a dual-output, highefficiency, high density, μModule regulator with 4.5V to16V input range. Each output can supply 50A maximumload current. The demo board has a LTM4700 μModuleregulator, which is a dual 50A or single 100A step-downregulator with digital power system management. Pleasesee LTM4700 data sheet for more detailed information.

DC2702A-A powers up to default settings and producepower based on configuration resistors without the needfor any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensivepower system management features of the part, downloadthe GUI software LTpowerPlay™ onto your PC and use LTC’s I2C/SMBus/PMBus dongle DC1613A to connect tothe board.LTpowerPlay allows the user to reconfigure thepart on the fly and store the configuration in EEPROM, viewtelemetry of voltage, current, temperature and fault status.

图10.双输出LTM4700/DC2702A-A外形图

图11.演示电路DC2702A-A和PC建立图

图12.演示电路DC2702A-A电路图(1)

图13.演示电路DC2702A-A电路图(2)

图14.演示电路DC2702A-A电路图(3)
演示电路DC2702A-A材料清单:


详情请见:
https://www.analog.com/media/en/technical-documentation/data-sheets/LTM4700.pdf
https://www.analog.com/media/en/dsp-documentation/evaluation-kit-manuals/DC2702A-A.pdf
以及https://www.analog.com/media/en/technical-documentation/eval-board-schematic/DC2702A5-SCH.pdf
DC2702A5-SCH.pdf
DC2702A-A.pdf
LTM4700.pdf
DC2702A.zip

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