Linear LTM467518A μModule数字电源系统管理方案

Linear公司的LTM4675是具有数字电源系统管理的双路9A或单路18A μModule(电源模块),开关时间70ms,通过PMBus可对电源管理参数进行遥控配置和远程监测.器件包括块速模拟控制回路,精密的混合信号电路以及EEPROM,功率MOSFET,电感和支持元件.输入电压4.5V-17V,输出电压0.5V-5.5V,DC输出温度误差±0.5%,主要用在原型,生产和现场环境的系统优化,特性和数据采掘.本文介绍了LTM4675主要特性,简化框图和功能框图,几种应用电路以及演示板DC2204A特性,电路图和材料清单.
The LTMR4675 is a dual 9A or single 18A step-downμModuleR (micromodule) DC/DC regulator with 70msturn-on time. It features remote configurability andtelemetry-monitoring of power management parametersover PMBus— an open standard I2C-based digital interfaceprotocol . The LTM4675 is comprised of fast analogcontrol loops, precision mixed-signal circuitry, EEPROM,power MOSFETs, inductors and supporting components.
The LTM4675’s 2-wire serial interface allows outputs to bemargined, tuned and ramped up and down at programmableslew rates with sequencing delay times. Input and output currents and voltages, output power, temperatures, uptimeand peak values are readable. Custom configuration ofthe EEPROM contents is not required. At start-up, outputvoltages, switching frequency, and channel phase angleassignments can be set by pin-strapping resistors. TheLTpowerPlay™ GUI and DC1613 USB-to-PMBus converter and demo kits are available.
The LTM4675 is offered in a 16mm × 11.9mm × 3.51mmBGA package available with SnPb or RoHS compliantterminal finish.
LTM4675主要特性:
Dual, Fast, Analog Loops with Digital Interfacefor Control and Monitoring
Wide Input Voltage Range: 4.5V to 17V
Output Voltage Range: 0.5V to 5.5V
±0.5% Maximum DC Output Error Over Temperature
±2.5% Current Readback Accuracy at 9A Load
400kHz PMBus-Compliant I2C Serial Interface
Integrated 16-Bit ΔΣ ADC
Supports Telemetry Polling Rates Up to 125Hz
Constant Frequency Current Mode Control
Parallel and Current Share Multiple Modules