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低输入电压转换器可生产环保便携式设备 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2007 夏季刊 » 技术新知
低输入电压转换器可生产环保便携式设备

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一种低输入电压dc/dc增压转换器可以从替代能源中获取电能,为移动医疗器械供电。
随着社会对环境越来越关注,寻找替代能源、生产绿色产品已经不仅仅是口号了。这促使了Texas Instruments公司(美国达拉斯;www.ti.com)研发出一种芯片,使便携式设备可以从替代能源中获取电能。

该公司称,TPS61200转换器由于可以从太阳光或者微型燃料电池中获取电能,因此可通过单个太阳能电池给锂电池充电。由于这一特性,该转换器可以与多种移动医疗器械相整合,比如,伞兵医务员或者战斗军医在医院外环境中使用的器械。同样的,该产品也可与许多通用医疗设备相整合,如使用1节,2节或者3节碱性电池、镍镉电池、镍-金属氢化物电池以及单节锂电池供电的设备。

该公司表示,设备并非针对家用的大型太阳能板设计,而是针对一些可以使用外部或整合至产品本身中的太阳能充电系统的应用。

此芯片号称是行业中输入电压最低的dc/dc增压转换器,输入电压范围为0.3至5.5V,在任何负载状态下均有0.5V启动能力。能够在如此低的输入电压下保持运转,是设备能利用替代能源的关键原因。根据该公司表示,一般转换器最低输入电压为0.7V,启动电压为0.9V,这是妨碍替代能源应用的设计瓶颈。

转换器设计为10针脚33mm的QFN包装,也可提供1.5A的开关、输出短路保护系统、可编程欠压锁定(UVLO)以及一个降压转换模式,设计用于在输入电压高出输出电压时保护装置。

该设备可针对输入电压范围和电流精细地调节输出电压,由于这些电压值相当低,在这个水平上进行控制是很不容易的。


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