中国电子技术网

设为首页 网站地图 加入收藏

 

新葡京娱乐平台

关键词:电源管理 DC/DC转换器 ISL68300

时间:2018-08-16 10:46:55       作者:Renesas       来源:中电网

Renesas公司的ISl68300是集成了驱动器和PMBus可升级单输出数字PWM控制器,特别适合和分立的MOSFET使用,完全实现了数字ChargeMode™控制调制方案,获得业界一流性能和容易使用.ChargeMode控制提供稳定控制回路,能响应在单个周期内负载瞬变,从而大大降低了对输出电容的要求.输入电压范围4.75V-16V或4.5V-5.5V,输出电压范围0.45V-5.5V,输出电压精度0.5%,开关频率范围200kHz 到1.0MHz,主要用在服务器和存储设备,通信和数据通信设备,以及如FPGA,ASIC,DSP和存储器电源.本文介绍了ISL68300主要特性,框图,几种应用电路,以及评估板ISL68300EVAL2Z主要特性和指标,电路图,材料清单和PCB设计图.

The ISL68300 is a PMBus compliant, single-phasedigital DC/DC controller optimized for use with discreteMOSFETs.

The ISL68300 implements the Renesas fully digitalChargeMode™ control modulation scheme, allowing itto achieve both industry leading performance and ease ofuse. ChargeMode control provides an inherently stablecontrol loop that can respond to load transients in a singleswitching cycle, significantly decreasing output capacitorrequirements.

A dedicated current share bus allows for paralleling up toeight devices in a current share configuration, allowingsupport for a wide range of load currents.

In conjunction with many other Renesas digitalcontrollers, the ISL68300 is capable of complexsequencing and fault spreading. The Digital-DC™(DDC) bus is a single-wire serial bus which provideshigh performance inter-device communication withoutthe need for external sequencers, reducing overall systemcosts.

The PMBus interface facilitates device configuration,provides supply telemetry and detailed fault reportingincluding a parametric capture tool (SnapShot). All ofthese features are conveniently accessible through thePowerNavigator™ software tool. Additionally, a widearray of common configuration options areindependently configurable through use of pin-strapresistors.

The ISL68300 supports a comprehensive faultmanagement system, with dedicated hardware supportfor cycle-by-cycle overcurrent, overvoltage,undervoltage, and temperature faults. The configurablefault response system is capable of latching off or restarting the output on a fault-by-fault basis. IntegratedLDOs for device and gate driver bias allow for singlesupply operation.

A companion device, the ISL68301, has a PWM output,which can be paired with the Renesas family of SmartPower power stages or DrMOS devices.

ISL68300主要特性:

• Unique compensation-free design, which is alwaysstable
• Output voltage range: 0.45V to 5.5V
• Input voltage range: 4.75V to 16V or 4.5V to 5.5V
• 0.5% output voltage accuracy over line, load, andtemperature
• ChargeMode control achieves fast transient response,reduced output capacitance, and provides outputstability without compensation
• Single-channel output, can be paralleled with up toeight devices in a single droop-less current sharingoutput
• Switching frequency range of 200kHz to 1.0MHz
• Proprietary single-wire DDC serial bus enablesvoltage sequencing and fault spreading with otherRenesas digital power ICs
• Cycle-by-cycle inductor peak current protection
• Digital fault protection for output voltage UV/OV,input voltage UV/OV, and temperature
• Cycle-by-cycle output current measurement withadjustable gain settings for sensing with high current,low DCR inductors
• Monitor ADC measures input voltage, input current,output voltage, internal temperature, and externaltemperature
• Nonvolatile memory (NVRAM) for storing operatingparameters and fault events
• PMBuscompliant, supports 112 PMBus commands

ISL68300应用:

• Servers and storage equipment
• Telecom and datacom equipment
• Power supplies (FPGA, ASIC, DSP, memory)

图1.ISL68300框图

图2. ISL68300宽范围输入和输出应用电路图

图3. ISL68300 5V正常输入电压应用电路图

图4. ISL68300两相电流共享电路图

评估板ISL68300EVAL2Z

2.5V – 5.5V Output Voltage Single-Phase ISL68300 Evaluation Board
ISL68300EVAL2Z
User’s Manual: Evaluation Board
The ISL68300EVAL2Z evaluation board is a 2.7inx3.0in 6-layer FR4 board with 2oz. copper on all layers. Thisevaluation board comes with a placeholder for pin-strap resistors to adjust output voltage, switching frequency, and thedevice PMBus address. More configurations, such as soft-start and fault limits, can be easily programmed or changedusing a PMBus compliant serial bus interface.

This evaluation board includes the ZLUSBEVAL3Z (USB to PMBus adapter), which connects the evaluation board toa PC to activate the PMBus communication interface. The PMBus command set is accessed by using thePowerNavigator™ evaluation software from a PC running Microsoft Windows.

图5.评估板ISL68300EVAL2Z外形图(顶视)

图6.评估板ISL68300EVAL2Z外形图(底视)

评估板ISL68300EVAL2Z主要特性:

• VIN range of 4.5V to 16V, VOUT adjustable from 2.5V to 5.5V
• Programmable VOUT, margining, UV/OV, IOUT limit, soft-start/stop, sequencing, and external synchronization
• Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency, and faults
• ChargeMode control tunable with PMBus
• On-board load step circuit
• Mechanical switch for enable and power-good LED indicator

评估板ISL68300EVAL2Z主要指标:

This board is configured for the following operating conditions by default:
• VIN = 7V to 16V
• VOUT = 3.3V
IMAX = 20A
• fSW = 500kHz
• Peak efficiency: >94% at 50% load
• On/off delay = 5ms, on/off ramp time = 5ms

图7.评估板ISL68300EVAL2Z框图

图8.评估板ISL68300EVAL2Z电路图(1)

图9.评估板ISL68300EVAL2Z电路图(2):输入和输出滤波器

图10.评估板ISL68300EVAL2Z电路图(3):I2C,使能,PG

图11.评估板ISL68300EVAL2Z电路图(4):动态负载
.评估板ISL68300EVAL2Z材料清单:



图12.评估板ISL68300EVAL2Z PCB设计图(1):顶层丝印

图13.评估板ISL68300EVAL2Z电路图(2):顶层

图14.评估板ISL68300EVAL2Z电路图(3):内层层2

图15.评估板ISL68300EVAL2Z电路图(4):内层层3

图16.评估板ISL68300EVAL2Z电路图(5):内层层4

图17.评估板ISL68300EVAL2Z电路图(6):内层层5

图18.评估板ISL68300EVAL2Z电路图(7):底层

图19.评估板ISL68300EVAL2Z电路图(8):底层丝印
详情请见:
https://www.intersil.com/content/dam/Intersil/documents/isl6/isl68300.pdf
https://www.intersil.com/content/dam/Intersil/documents/isl6/isl68300eval2z-user-guide.pdf
isl68300.pdf
isl68300eval2z-user-guide.pdf
isl68300eval2zbom_design.zip

 

猜你喜欢