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DIGITALLY ADJUSTABLE BOOST CONVERTERThe TPS61045 is a high frequency boost converter with digitally programmable output voltage and true shutdown. During shutdown, the output is disconnected from the input by opening the internal input switch. This allows a controlled power up/down sequencing of the 阅读全文
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http://www.powerguru.org/changing-the-output-voltage-of-a-switching-regulator-on-the-fly/There are many different ways to change the output voltageApplications that require the output voltage of a power supply to change dynamically come from a wide variety of areas. Examples are sensor applications 阅读全文
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As shown in figure 3.4, PWM controller contains two main parts;voltage error-amplifier and voltage comparator. The error-amplifier compares the feedback voltage VF (applied to inverting input) to reference voltage VREF (applied to non-inverting input) then their difference which is called voltage er 阅读全文
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GENERAL DESCRIPTION The AX5511 is a current mode step up converter intended for small, low powerapplications. The converter input voltage ranging from 2.6V to 5.5V. The Output voltage can be set up to 27V. The frequency is 1.2MHz allows the use of small external inductors and capacitors and provides 阅读全文
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http://www.edn.com/design/analog/4363990/Control-an-LM317T-with-a-PWM-signalThe LM317T from NationalSemiconductor is a popular adjustable-voltageregulator thatprovides output voltagesof 1.25 to 37V with maximum 1.5Acurrent. You can adjust the outputvoltagewith a potentiometer. The circuit inFigure 1 阅读全文
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The LM27313 switching regulator is a current-mode boost converter with a fixed operating frequency of 1.6 MHz.The use of the SOT-23 package, made possible by the minimal losses of the 800 mA switch, and small inductors and capacitors result in extremely high power density. The 30V internal switch ma 阅读全文
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http://bbs.kechuang.org/read-kc-tid-9837-page-e.html摘要：本文介绍了一种性价比高、功能丰富的程控开关电源的设计，对基于LM2576控制核心的升、降压电路设计、切换及恒流输出电路进行了详细介绍。性能测试结果验证了本设计的有效性及实用性。关键词：开关电源;多功能;LM2576引言随着电源技术的飞速发展，开关电源以其功耗小、体积小、重量轻等优点得到了广泛的应用。目前开关电源也正在朝着集成化与多功能化的方向发展。本文以大学生电子设计竞赛为背景，介绍一种性价比高、功能较强的实用开关电源设计方案。竞赛内容为设计具有单路恒压输出功能的开关电源，输出电压范围 阅读全文