| Intersil ISL8107高压电源控制方案 |
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| 作者：未知 来源：Intersil 点击数：165 更新时间：2008-9-18 |
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Intersil公司的ISL8107是单相异步降压控制器,它集成了高边MOSFET驱动器,工作电压很宽,从9V到75V,内部的基准电压1.192V,在工业温度范围内的误差为±1%.可编程的开关频率从100kHz 到600kHz,广泛用于测试测量仪器,路由器和交换机,POS模块,工业应用以及通信/数据通信等.本文介绍了ISL8107的主要特性,方框图,典型应用电路以及评估板电路图和所采用的元器件清单(BOM).
The ISL8107 is a single phase, non-synchronous buck controller with an integrated high-side MOSFET driver. The controller operates from 9V to 75V input voltage range. The internal 1.192V reference voltage has a tolerance of ±1% over the industrial temperature range.
The ISL8107 employs voltage-mode control with feedforward compensation to provide optimal transient response and a constant loop gain over a wide input voltage range. The switching frequency can be programmed from 100kHz to 600kHz by external resistor and capacitor. The switching frequency can be synchronized to an external clock signal through the SYNC pin.
The ISL8107 features programmable soft-start, hiccup mode for short circuit protection, and over-temperature protection. The overcurrent protection is implemented using MOSFET’s rDS(ON) sensing. This approach simplifies the implementation without deteriorating the converter efficiency.
ISL8107主要特性:
Operates from +9V to +75V Bias Supply Voltage
+1.192V Internal Voltage Reference
-±1% tolerance Over the Industrial Temperature Range
Programmable Switching Frequency 100kHz to 600kHz
Simple Single-Loop Voltage Mode Control
Voltage Feedforward Compensation
Switching Frequency Synchronization
Lossless, Programmable Overcurrent Protection
-Uses MOSFET’s rDS(ON)
-Hiccup Mode
Integrated N-Channel MOSFET Gate Drivers
Programmable Soft-Start
Over-Temperature Protection
QFN (5x5) Package
-QFN compliant to JEDEC PUB95 MO-220 QFN – Quad Flat No Leads - Product Outline
-QFN Near Chip Scale Package Footprint; Improves PCB Efficiency, Thinner in Profile
Pb-free (RoHS compliant)
应用:
Test and Measurement Instruments
Routers and Switchers
Point of Load Modules
Distributed DC/DC Power Architecture
Industrial Applications
Telecom/Datacom Applications
图1. ISL8107方框图
图2.ISL8107典型应用电路
图3. ISL8107评估板外形图
图4. ISL8107评估板电路图
评估板材料清单(BOM)
详情请见:
http://www.intersil.com/data/fn/fn6605.pdf
和
http://www.intersil.com/data/an/an1402.pdf
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