英特矽尔案例： ISL8204M高效DC-DC电源转换方案

Intersil 公司的ISL8204M和ISL8206M是高效容易使用的大功率DC-DC转换模块, ISL8204M的电流为4A,峰值电流达6.6A, ISL8206M的电流为6A,峰值电流达8.8A,输入电压从1VDC到20VDC,单电阻设定输出电压从0.6V到6V,效率高达95%,具有过流保护和软起动功能,主要用在服务器,通信,工业设备,POL稳压和通用降压DC/DC转换器.本文介绍ISL8204M主要特性和功能方框图, 性能测试电路图, 应用电路图以及评估板电路图和评估板材料清单(BOM).

The ISL8204M, ISL8206M is a family of pin-compatible power modules to the ISL8201M. These are simple and easy to use, high power DCDC modules and are ideal for a wide variety of applications. The ISL820xM family of high current DCDC step-down modules virtually eliminate design and manufacturing risks while dramatically improving time to market.

The simplicity is in the familys "Off The Shelf" unassisted implementation. All you need is the ISL820xM for the current requirement of your design, bulk input and output capacitors and one resistor, to program the output voltage, and you have a complete high current power design ready for your market.

This family of buck converters is packaged in a thermally enhanced compact (15mmx15mm) over-molded QFN Package that operates without a heat sink, even at full load over temperature. The package supports simple, reliable, automated assembly using standard surface mount equipment while making it easy to probe to all pins. The lack of a required heat dissipation layer, provides easy access to all pins and the limited number of the external components reduce the PCB to a component layer and a simple ground layer. Additionally, each IC in the family is foot print compatible, making it easy to change your design to meet different power needs without changing your layout. One simple layout fits all.

ISL8204M 主要特性:

• Complete Switch Mode Power Supply in one package

- ISL8204M - 4A with, 6.6A Peak

ISL8206M - 6A with, 8.8A Peak

• Single Resistor Sets VOUT +0.6V up to +6V @ ±1%

• Up to 95% Efficiency

• Overcurrent Protection

• Internal Soft Start with Pre-bias Output Start-up

• Wide Input Voltage Range from 1VDC to 20VDC

• Fast Transient Response

ISL8204M 应用:

• Servers

• Telecom and Datacom Applications

• Industrial Equipment

• Point of Load Regulation

• General Purpose Step-Down DC/DC

图1.ISL8204M内部方框图

图2.ISL8204M性能测试电路图

图3.ISL8204M典型应用电路图

图4.宽输入电压ISL8204M应用电路图

ISL8201M, ISL8204M, ISL8206M EVAL1Z 评估板

图5.评估板POL模块外形图

图6.评估板电路图

评估板材料清单(BOM):

详情请见:

https://www.intersil.com/data/fn/fn6999.pdf

和

https://www.intersil.com/data/an/an1386.pdf