【IC】 日清纺带看门狗定时器、输出电压升降监控复位功能的 LDO稳压器“NP4271”系列产品上市
日清纺微电子将推出一款适用于车载设备的LDO稳压器“NP4271”系列产品,该稳压器内置有看门狗定时器和输出电压上升/下降监控复位功能。
近年来,根据汽车功能安全设计的要求,为了确保系统稳定运行和早期发现故障,需要追加电压监控功能和冗余设计的电子控制应用在不断增加。因此,对从外部监控微控制器( MCU)的看门狗定时器(WDT)和输出电压监控复位功能的高精度需求也在不断增加。
“NP4271”系列是将时间设定精度良好的WDT、高精度输出电压升降监控复位和瞬态响应特性良好且输出电流500mA的LDO单片化,有助于系统的小型化,可以构建功能安全所需的稳定运行和安全性更高的系统。
LDO的输入电压范围为4.0V至40V,输出电压有3.3V和5.0V两种,输出电压可在较宽范围的条件下(VIN=6V to 40V, Io=5mA to 500mA, Ta=-40℃ to 125℃)实现±2.0%的高精度。 输出电压监控复位有两种类型:A 版本同时监控低边和高边,B 版本仅监控低边。低边检测精度:VDETL ±2.0%(Ta=-40℃ to 125℃),高边检测精度:VDETH±5.0%(Ta=-40℃ to 125℃)。 WDT的时间设定精度为高精度,其中WDT监测时间精度为±20%(Ta=-40℃ to 125℃)、WDT复位时间精度为±20%(Ta=-40℃ to 125℃),因此有助于提高系统的安全性和部件选择的自由度。
预想应用包括有前照灯和空调控制面板的车载ECU等,NP4271的品质等级为P级,适用于底盘车身控制和驾驶舱系统。
产品特点
1. 内置输出电压升降监控功能和WDT功能,实现了高度稳定的系统和小型化
在车载应用中,为了系统的稳定运行和快速确定故障,越来越多的应用需要电压监控功能和冗余设计。NP4271系列组合了多种功能,不仅提高了系统的稳定性和安全性,还有助于系统小型化。
2. 良好的输入瞬态响应特性有助于系统稳定运行
当电源线VIN上连接多个负载时,负载的工作状态可能会导致电源线波动,这样会影响到输出电压。NP4271系列的输入瞬态响应特性良好,能够抑制输出电压的波动,有助于系统稳定运行。
<输入瞬态响应特性示例>
产品图片
A版本 B版本
NP4271AC系列(HSOP-8-AC)
主要性能指标(详情请参阅产品数据表)
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本文由拾一转载自NISSHINBO官网,原文标题为:带看门狗定时器、输出电压升降监控复位功能的 LDO稳压器“NP4271”系列产品上市,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
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