中国电子技术网

设为首页 网站地图 加入收藏

 
 

[原创] On Semi NCV898031汽车SEPIC-升压控制器解决方案

关键词:汽车电子 DC/DC转换器 SEPIC 起停系统 NCV898031

时间:2014-10-23 11:13:03       作者:On Semi       来源:中电网

On Semi公司的NCV898031是单端初级电感转换器(SEPIC)/升压控制器,驱动外接的N沟MOSFET,开关频率2MHz.输入电压从3.2V到45V,1.2V 2%精度基准电压,采用内部斜率补偿的峰值电流模式控制,主要用于汽车的起停系统,头灯和后灯,直喷汽油,小型POL电源,SEPIC,升压和反激电源等.本文介绍了NCV898031主要特性,框图和应用电路,以及SEPIC和升压电流模式电路图, NCV898031评估板主要特性,电路图,材料清单和PCB元件布局图与连接图.

The NCV898031 is an adjustable output non-synchronous 2 MHz SEPIC/boost controller which drives an external N-channel MOSFET. The device uses peak current mode control with internal slope compensation. The IC incorporates an internal regulator that supplies charge to the gate driver.

Protection features include internally-set soft-start, undervoltage lockout, cycle-by-cycle current limiting and thermal shutdown.

Additional features include low quiescent current sleep mode and microprocessor compatible enable pin.

NCV898031主要特性:

• Peak Current Mode Control with Internal Slope Compensation
• 1.2 V _2% Reference Voltage
• 2 MHz Fixed Frequency Operation
• Wide Input Voltage Range of 3.2 V to 40 V, 45 V Load Dump
• Input Undervoltage Lockout (UVLO)
• Internal Soft−Start
• Low Quiescent Current in Sleep Mode (< 10 _A Typical)..

查看全文

  • 分享到:

 

猜你喜欢