DIGITALLY ADJUSTABLE BOOST CONVERTER The 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…

Single Inductor Buck-Boost Converter in Tiny WCSP The TPS63036 is a non inverting buck-boost converter able to provide a regulated output voltage from an input supply that can be higher or lower than the output voltage. The buck-boost converter is ba…

http://pdfserv.maximintegrated.com/en/an/AN818.pdf http://www.maximintegrated.com/app-notes/index.mvp/id/818 Digital Adjustment of DC-DC Converter Output Voltage in Portable Applications Abstract: This tutorial discusses methods for digitally adjusti…

Boost converters, like other switchers, have traditionally received their control signals from a dedicated circuit. However, a recent trend is to integrate simple switching-power-supply building blocks into generic devices, such as microcontrollers.…

http://www.powerguru.org/changing-the-output-voltage-of-a-switching-regulator-on-the-fly/ There are many different ways to change the output voltage Applications that require the output voltage of a power supply to change dynamically come from a wide…

The step-up switching-converter circuit in Figure 1 presents a familiar problem: If you shut down boost converter IC1 by pulling its  input low, external inductor L1 and forward-biased Schottky diode D1 allow the load to continue drawing current. For…

Cs5171: Tracking Boost Regulator Adding a current mirror circuit to a typical boost circuit allows the user to select the amount of boost voltage and ensure a constant difference between input and output voltage.   This is useful for high side drive…

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…

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1.ADC1 and ADC2 are 10-bit successive approximation Anolog to Digital Converters. 所谓successive approximation,是逐次逼近的意思: 逐次逼近型ADC解释详见--博客http://blog.sina.com.cn/s/blog_a438e5290102wakc.html 2.ADC分为ADC1和ADC2,ADC1的功能相比起ADC2更为强大,我们使用的是ADC1: 3.ADC有多种模式:(1)…

1.ADC1 and ADC2 are 10-bit successive approximation Anolog to Digital Converters. 所谓successive approximation,是逐次逼近的意思: 逐次逼近型ADC解释详见——博客http://blog.sina.com.cn/s/blog_a438e5290102wakc.html 2.ADC分为ADC1和ADC2,ADC1的功能相比起ADC2更为强大,我们使用的是ADC1: 3.ADC有多种模式:(1)…

http://www.romanblack.com/smps/conv.htm What is it?  This is a simple smps voltage converter, it makes an output voltage of +13.3v from a "standard" +5v supply as used with logic chips. I was contacted by hobby PIC programmer legend Myke Predko …

Targeting use in portable-system applications that require raising a battery's voltage to a higher level, IC boost regulators often include output transistors that can drive storage inductors. However, most boost regulators' absolute-maximum input-vo…

http://sourceforge.net/projects/openprogrammer/?source=navbar Open Programmer http://openprog.altervista.org/OP_eng.html#Quick Open Programmer v0.8.x Quick facts Completely free and Open Source (including firmware) Programs PIC10-12-16-18-24, dsPIC30…

http://www.design-reuse.com/articles/14886/fully-digital-implemented-delta-sigma-analog-to-digital-converter.html by Dr. Michael  Gude & Gerriet MuellerCologne Chip AG, Koeln (Cologne), Germany Abstract One of the most challenging tasks in Analog to…

http://electronicdesign.com/power/simple-addition-permits-voltage-control-dc-dc-converters-output In a standard dc-dc converter, a resistor divider typically defines a fixed output voltage. However, applications like programmable output voltage power…

Voltage Translation for Analog to Digital Interface 孕龙逻辑分析仪 ZeroPlus Logic Analyzer How to modify analog output range of Arduino Due In today's microcontroller market, most of the Analog to Digital converters are only able to accept voltages from the…

how to generate an analog output from a in-built pwm of Atmega 32AVR microcontrloller? you need a resistor, a capacitor and an opamp. opamp is not really necessary when you are driving a mosfet, but will make life a bit easier. just be aware, that th…

http://electronicdesign.com/digital-ics/digital-current-mode-control-challenges-analog-counterparts Digital Current-Mode Control Challenges Analog Counterparts Electronic Design Bryan Kris Thu, 2006-11-16 (All day) Switch-mode power supplies can use…

Voltage Translation for Analog to Digital Interface ADC How to modify analog output range of Arduino Due Arduino Due does not have an analog output voltage from 0 V to Vref, but from 1/6 to 5/6 of the reference voltage, that is, 0.55 V and 2.75V with…

http://learn.adafruit.com/ice-tube-clock-kit/design Tubes such as VFDs, Nixies, Decatrons, etc require high voltage to light the gas in the tube. For nixies, this iabout 170VDC. VFDs aren't as bad they only need about 30-50VDC. In order to reduce cos…

Adding a current-mirror circuit to a typical boost circuit allows you to select the amount of boost voltage and to ensure a constant difference between the input and the output voltages (Figure 1). This circuit is useful for high-side-drive applicati…

A previous Design Idea describes a programmable current source that used a three-terminal National Semiconductor LM317 adjustable regulator (Reference 1). Although that circuit lets you program the output current, the load current flowed through the…

A variable resistor that integrates a programmable, temperature-indexed look-up table can compensate for the temperature drift of a voltage regulator. In this case, the look-up table can change the resistance every 2°C over a range of –40 to +102°C,…

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 inpu…

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en011794 In many applications, a DC/DC Converter is used to produce a regulated voltage or current, derived from an unregulated power supply, or from a battery. Ex…

Digital potentiometers, such as Analog Devices’ AD5160, make excellent digitally controlled voltage dividers in applications in which 8-bit resolution is acceptable. This Design Idea shows how to use a CMOS DAC as a voltage divider in applications re…

LDO Regulator High accuracy voltage regulator Vout = 2.5V * (1 + ( 5.6 / 6.8 ) ) = 4.55V Recently the author had to adapt  a standard circuit configuration  (which often uses an npn bipolar) so as to operate as a low-dropout (LDO) regulator. The circ…

It's a Buck; It's a Boost, No! It's a Switcher! Sanjaya Maniktala, National Semiconductor Corp., Santa Clara, CA We like to give everything a name or label very quickly. We probably feel we can then easily identify the object in the future, and also…

The most common switching-power topology is a buck converter, which efficiently transforms high voltages to low voltages. Figure 1 shows a typical buck converter in which the N-channel MOSFET, Q1, needs a floating-gate drive signal. The floating-gate…