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  1. 齐乐娱乐老虎机官网 >  解决方案 >  [齐乐娱乐老虎机官网] Renesas ISL8282M 15A高效混合数字降压电源模块解决方案

[齐乐娱乐老虎机官网] Renesas ISL8282M 15A高效混合数字降压电源模块解决方案

关键词:电源管理 DC/DC转换器 ISL8282M 时间:2019-04-04 11:19:41       来源:齐乐娱乐老虎机官网

Renesas公司的ISL8282M是PMBus使能的具有Renesas R4™技术的高效混合单路数字降压电源模块,输入电压4.5V-16.5V,输出电压范围0.5V-5V,输出连续电流高达15A,转换效率高达90%.器件包括用于器件配置的SMBus/PMBus/I2C接口,遥测(VIN,VOUT,IOUT和温度)以及故障报告.所采用的Renesas R4控制方案具有极快的瞬态性能,精确的频率控制和内部补偿,其效率增强模式PFM大大改善了轻负载的效率,而ISL8282M串行总线使得R4回路优化容易实现,使得广泛范围内包括所有陶瓷输出滤波器的应用都有快速瞬态性能,具有超温保护,输出过流和短路保护,输出过压和欠压保护,遥测断开保护,输入UVLO和加电顺序,故障重置,以及和Renesas PowerNavigator™软件兼容.主要用在服务器,通信,存储和数据通信,工业/ATE和网络设备,图像卡以及用于ASIC,FPGA,DSP和存储器的通用电源.本文介绍了ISL8282M主要特性,框图,典型应用电路以及评估板ISL8282MEVAL1Z主要特性,指标和框图,电路图和材料清单,以及PCB设计图.

The ISL8282M is a PMBus enabled DC/DC singlechannel step-down power supply featuring theproprietary Renesas R4™ Technology. The modulesupports a wide 4.5V to 16.5V input voltage range and awide 0.5V to 5V output range capable of delivering up to15A of continuous current. The ISL8282M achieves upto 95% conversion efficiency and is optimized for highpower density. Integrated LDOs provide module biasvoltage allowing for single supply operation. TheISL8282M includes a SMBus/PMBus/I2C interface fordevice configuration, telemetry (VIN, VOUT, IOUT, andtemperature), and fault reporting.

The proprietary Renesas R4 control scheme has extremelyfast transient performance, accurately regulatedfrequency control, and all internal compensation. Anefficiency enhancing PFM mode greatly improveslight-load efficiency. The ISL8282M’s serial bus allowsfor easy R4 loop optimization that results in fast transientperformance across a wide range of applicationsincluding all ceramic output filters.

The ISL8282M has four 8-bit configuration pins thatprovide very flexible configuration options (such asfrequency, VOUT, and AV gain) without the need forbuilt-in NVM memory. As a result, the design flowclosely matches traditional analog modules while stilloffering the design flexibility and feature set of a digitalSMBus/PMBus/I2C interface. The ISL8282M featuresremote voltage sensing, completely eliminates anypotential difference between remote and local ground,and improves regulation and protection accuracy. Aprecision enable input coordinates the startup of theISL8282M with other voltage rails and is especiallyuseful for power sequencing.

The ISL8282M integrates all power and most passivecomponents to minimize the external components andsignificantly reduce design complexity and board space.

The ISL8282M is available in a low-profile, thermallyenhanced, compact 12mmx11mmx5.3mm fullyencapsulated HDA package.

ISL8282M主要特性:

• Proprietary RenesasR4 Technology
• Linear control loop for optimal transient response
• Variable frequency and duty cycle control duringload transient for fastest possible response
• Inherent voltage feed-forward for wide rangeinput
• Input voltage range: 4.5V to 16.5V
• Output voltage range: 0.5V to 5V
• ±1.5% load/line/temperature regulation with remotesense
• Supports all ceramic solutions
• Integrated LDOs for single input rail solution
• SMBus/PMBus/I2C compatible up to 1.25MHz
• 256 boot-up voltage levels with a configuration pin
• Seven switching frequency options from 300kHz to1MHz
• PFM operation option for improved light-loadefficiency
• Startup into precharged load
• Power-good monitor for soft-start and fault detection
• Comprehensive fault protection for high systemreliability
• Over-temperature protection
• Output overcurrent and short-circuit protection
• Output overvoltage and undervoltage protection
• Open remote sense protection
• Input UVLO and power sequence, fault reset
• Compatible with RenesasPowerNavigator™software
• Thermally enhanced 12mmx11mmx5.3mm HAD Package

ISL8282M应用:

• Servers, telecom, storage, and datacom
• Industrial/ATE and networking equipment
• Graphics cards
• General purpose power for ASIC, FPGA, DSP, and Memory

图1. ISL8282M框图

图2. ISL8282M典型应用电路

评估板ISL8282MEVAL1Z

The ISL8282MEVAL1Z evaluation board (shown in Figures 4 and 5) is designed for evaluating the ISL8282M. TheISL8282M is a single channel step-down, synchronous DC/DC power supply module that is capable of delivering upto 15A of continuous current. The proprietary RenesasR4 Technology control scheme has extremely fast transientperformance, accurately regulated frequency control, and all internal compensation. The ISL8282M includes anSMBus/PMBus/I2C interface for module configuration, telemetry (VIN, VOUT, IOUT, and temperature) and faultreporting, and allows for easy R4 loop optimization that results in fast transient performance across a wide range ofapplications, which includes all ceramic output filters. The ISL8282M integrates the controller, all power components,and most passive components. The device requires only a few external components to operate, which significantlyreduces design complexity and board space, and it optimizes for high power density applications without the need forairflow or a heatsink.

The ISL8282MEVAL1Z evaluation board is a 3x3.4 inch six-layer FR4 board with 2oz. copper on all layers. TheISL8282MEVAL1Z operates from a single 4.5V to 15V wide input power rail and offers adjustable output voltagesdown to 0.5V and efficiencies of up to 95%. The ISL8282MEVAL1Z comes with placeholders for pin-strap resistors toprogram output voltage, PFM/PWM mode, temperature compensation (TCOMP), PMBus address, switchingfrequency (fSW), AV gain, OCP retry/latchoff, ultrasonic PFM enable, soft-start ramp rate, RR impedance, and AV gainmultiplier (1x or 2x).

The ISL8282MEVALZ ships with the ZLUSBEVAL3Z (USB to PMBus adapter), which connects the evaluation boardto a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the RenesasPowerNavigator™ evaluation software from a PC running Microsoft Windows. The ISL8282MEVAL1Z can operatein Pin-Strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication.

By default, the ISL8282MEVAL1Z is set to a 1V output voltage with a 400kHz switching frequency, 49 AV gain, and200kΩ RR.

评估板ISL8282MEVAL1Z主要特性:

• Input voltage range: 4.5V to 15V, capable of delivering up to 15A of continuous current, and up to 95%conversion efficiency
• Adjustable output voltage: 0.5V to 5V with ±1.5% load/line/temperature regulation with remote sense
• Proprietary RenesasR4 Technology
• Programmable VOUT, PFM/PWM mode, TCOMP, PMBus address, fSW, AV gain, OCP retry/latchoff, ultrasonicPFM enable, soft-start ramp rate, RR, and AV gain multiplier
• Monitor: VIN, VOUT, IOUT, temperature, switching frequency, duty cycle, and faults
• Startup into precharged load
• Dedicated enable pin and PGOOD indicator
• Comprehensive fault protection for high system reliability: over-temperature protection, output overcurrent andshort-circuit protection, output overvoltage and undervoltage protection, open remote sense protection, inputUVLO and power sequence, and fault reset
• Thermally enhanced 12mmx11mmx5.3mm HDA package
• Compatible with RenesasPowerNavigatorsoftware

评估板ISL8282MEVAL1Z主要指标:

The ISL8282MEVAL1Z is configured and optimized for the following operating conditions:
• VIN = 4.5V to 15V
• VOUT = 1V
• IOUT-MAX = 15A
• fSW = 400kHz
• AV gain multiplier = 2x, AV gain = 49, RR = 200kΩ
• PMBus address = 0x60h
• TCOMP = +5 ℃

图3.评估板ISL8282EVAL1ZM框图

图4.评估板ISL8282EVAL1ZM电路图
评估板ISL8282EVAL1ZM材料清单:



图5.评估板ISL8282EVAL1ZM外形图(正面)

图6.评估板ISL8282EVAL1ZM外形图(背面)

图7.评估板ISL8282EVAL1ZM PCB设计图:顶层丝印

图8.评估板ISL8282EVAL1ZM PCB设计图:顶层元件面

图9.评估板ISL8282EVAL1ZM PCB设计图:内层2

图10.评估板ISL8282EVAL1ZM PCB设计图:内层3

图11.评估板ISL8282EVAL1ZM PCB设计图:内层4

图12.评估板ISL8282EVAL1ZM PCB设计图:内层5

图13.评估板ISL8282EVAL1ZM PCB设计图:底层焊接边

图14.评估板ISL8282EVAL1ZM PCB设计图:底层丝印
详情请见:
https://www.renesas.com/us/en/www/doc/datasheet/isl8282m.pdf
https://www.renesas.com/us/en/www/doc/guide/r12uz0038eu-isl8282meval1z-user-manual.pdf
isl8282meval1zbom_design.zip
isl8282m.pdf

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