0 卖盘信息
您现在的位置: 首页 > 商城快讯 > 热门方案> 汽车电子 > 基于ONSEMI公司的NCV8876 汽车级高频启停升压控制器参考设计方案

基于ONSEMI公司的NCV8876 汽车级高频启停升压控制器参考设计方案

来源: 中电网
2019-05-06
类别:汽车电子
eye 24
文章创建人 拍明芯城

原标题:ONSEMI NCV8876 汽车级高频启停升压控制器参考设计方案

  ONSEMI公司的NCV8876是一款非同步升压控制器,用于汽车启停使得输入电池电压骤降,输出保持正常供电的应用。该芯片采用内部斜坡补偿的峰值电流控制模式,控制外部N沟道MOSFET场效应管。该芯片具有周期循环电流限制、热关断保护功能。本文首先介绍芯片的简介、特性、内部框图及应用领域,并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。

  The NCV8876 is a Non-Synchronous Boost controller designed to supply a minimum output voltage during Start-Stop vehicle operation battery voltage sags. The controller 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, cycle-by-cycle current limiting, protection and thermal shutdown.

  Additional features include low quiescent current sleep mode operation. The NCV8876 is enabled when the supply voltage drops below 7.3 V, with boost operation initiated when the supply voltage is below 6.8 V.

  NCV8876主要特性:

  • Automatic Enable Below 7.3 V (Factory Programmable)

  • Boost Mode Operation at 6.8 V

  • 2% Output Accuracy Over Temperature Range

  • Peak Current Mode Control with Internal Slope Compensation

  • Externally Adjustable frequency Operation

  • Wide Input Voltage Range of 2 V to 40 V, 45 V Load Dump

  • Low Quiescent Current in Sleep Mode (<11 A Typical)

  • Cycle−by−Cycle Current Limit Protection

  • Hiccup−Mode Overcurrent Protection (OCP)

  • Thermal Shutdown (TSD)

  • This is a Pb−Free Device

  NCV8876应用:

  • Applications Requiring Regulated Voltage through Cranking and Start−Stop Operation

  图1. NCV8876内部方框图

  NCV8876方案介绍:

  This NCV887601 evaluation board provides a convenient way to evaluate a high frequency boost controller designed to supply a minimum output voltage during Start-Stop vehicle battery voltage sags. The unit is in low Iq sleep-mode under normal battery operating condition and will wake-up when the monitored voltage drops below 7.3 V and begin regulating once 6.8 V is reached. Switching frequency is set to 440 kHz with a user selectable ROSC resistor. The evaluation board is rated 6.8 V / 3.6 A at a 2.6 V input voltage. Operation below 2.6 V is possible if output current is reduced.

  Key Features

  • Automatic enable below 7.3 V

  • Boost Operation at 6.8 V

  • 440 kHz Switching Frequency

  • Input Undervoltage Lockout

  • Wide Input Voltage of 2.6 V to 45 V

  • Low Quiescent Current in Sleep Mode (<11 A Typical)

  • Cycle-by-Cycle Current Limit Protection

  • Status Monitoring

  • Automotive Grade

  NCV8876方案原理图:

  图2. NCV8876方案原理图

  NCV8876方案材料清单:

  PCB元件布局图:


责任编辑:HanFeng

【免责声明】

1、本文内容、数据、图表等来源于网络引用或其他公开资料,版权归属原作者、原发表出处。若版权所有方对本文的引用持有异议,请联系拍明芯城(marketing(at)iczoom.com),本方将及时处理。

2、本文的引用仅供读者交流学习使用,不涉及商业目的。

3、本文内容仅代表作者观点,拍明芯城不对内容的准确性、可靠性或完整性提供明示或暗示的保证。读者阅读本文后做出的决定或行为,是基于自主意愿和独立判断做出的,请读者明确相关结果。

4、如需转载本方拥有版权的文章,请联系拍明芯城(marketing(at)iczoom.com)注明“转载原因”。未经允许私自转载拍明芯城将保留追究其法律责任的权利。

拍明芯城拥有对此声明的最终解释权。

标签: ONSEMI 控制器

相关资讯