LT1961 升压型稳压器造就了兼具升压和降压能力的扁平状SEPIC Transformerless dc/dc converter produces bipolar outputs Well-regulated, dual-polarity power supplies find wide use in disk-drive, handheld-device, automotive, and notebook-computer applications. In these applicatio…

The AD736 true-rms-to-dcconverter is useful for many applications that require precise calculation of the rms value of a waveform. This converter can determine the true rms value, the average rectified value, or the absolute value of a myriad input w…

Dual-polarity supply provides ±12V from one IC VC (Pin 1): Error Amplifier Output Pin. Tie external compensation network to this pin or use the internal compensation network by shorting the VC pin to the COMP pin.External compensation consists of pla…

Voltage Translation for Analog to Digital Interface ADC http://openschemes.com/2010/03/23/zeroplus-logic-cube-review-and-teardown/ LAP 16032 has 4.5MBIT SRAM and can aquire up to 128k per chn, now my LAP 16032 has 18MBIT SRAM It’s a good product, and…

Adding Digital control to Dual tracking LM317 / LM337 Bench supply I've been working on my own idea for a digitally controlled power supply over the last couple of weeks, originally using a MIC29302 which didn't look too bad, and a handful of DACs an…

Synchronous buck regulators offer high efficiency and are popular in applications in which available input voltages are 12V or less. However, as input voltage approaches 100V, wide-range-regulator design becomes more difficult, and the choice of suit…

In multiple-output power supplies in which a single supply powers circuitry of vastly different current draws, two perplexing steps are sensing the current that each output draws and deactivating the power supply in the event of an overload on that o…

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…

设计一个12V转3.3V,输出电流30mA的电源电路,由于项目对转化效率要求较高,所以不能采用低压差线性稳压LDO的方案.经过对比,TOREX的XC9264效率在此转化条件下效率可做到85%以上,比MPS等厂家同类型芯片效率做得高很多. 特性: 输入电压范围:3-18V(极限值20V) FBVoltage: 0.75V 开关频率:500kHz,1.2MHz,2.2MHz 输出最大电流:0.5A 控制模式:PWM/PFM 软启动时间:由RC调节 保护:过流保护.内部锁定机制.热关机 输出.输入采用…

前言:sis提供的驱动ic.基于rk3288的安卓系统.亲眼看到人家完成一次移植.很激动的记下一些东西..虽然我看不懂.其实现在的工作也不需要看懂.叫人协助就好,只需要知道有这个东西. 1linux下的usb的hid...... /* * HID support for Linux * * Copyright (c) 2015 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc * Copyright (c) 2015-2016 J…