By Bob Dobkin, John Hamburger
Design observe Collection, the 3rd booklet within the Analog Circuit Design series, is a finished quantity of utilized circuit layout suggestions, offering stylish and useful layout recommendations. layout Notes during this quantity are targeted circuit causes, simply utilized on your personal designs. This booklet comprises an in depth strength administration part, protecting switching regulator layout, linear regulator layout, microprocessor strength layout, battery administration, powering LED lighting fixtures, car and business strength layout. different sections span a variety of analog layout themes, together with info conversion, information acquisition, communications interface layout, operational amplifier layout concepts, filter out layout, and instant, RF, communications and community layout. no matter what your software -industrial, clinical, safeguard, embedded structures, instrumentation, automobile, communications infrastructure, satellite tv for pc and radar, desktops or networking; this booklet will offer functional layout options, built through specialists for tackling the demanding situations of strength administration, info conversion, sign conditioning and wireless/RF analog circuit design.
- A wealthy number of utilized analog circuit layout ideas to be used on your personal designs.
- Each layout be aware is gifted in a concise, two-page layout, making it effortless to learn and assimilate.
- Contributions from the prime lighting fixtures in analog layout, together with Bob Dobkin, Jim Williams, George Erdi and Carl Nelson, between others.
- Extensive sections overlaying strength administration, information conversion, sign conditioning, and wireless/RF.
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Extra info for Analog Circuit Design, Vol. 3 Design Note Collection
The internal gm amplifier gain is equal to gm · RO, where gm is the transconductance in mmhos, and RO is the output impedance in kohms. 2V = half load, and 2V = full load in this application. 3mmho. 2V from the 5V INTVCC, the gain can be limited without affecting the nominal DC set point at half load. The Thevenin equivalent resistance is seen to be in parallel with the amplifiers RO. 12kΩ. The voltage deviation at the amplifier input ΔVFB = ΔVITH/(gm · ROeff). 12kΩ) = 58mV, which is ±29mV from the nominal half load set point.
Designers also have the option of controlling the temperature in portable devices by using feedback from a temperature sensor to control the fan speed. 1 shows a typical application. Fan speed is easily programmed by sending a 6-bit digital code to the LTC1695 via the SMBus. This code is converted into an analog reference voltage that is used to regulate the output voltage of the LTC1695’s internal linear regulator. 1 • SMBus Fan Speed Controller enable an optional boost feature that eliminates fan start-up problems by outputting 5V to the fan for 250ms before lowering the output voltage to its programmed value.
Holding the pushbutton down for five seconds produces a hard reset. The hard reset shuts down the three bucks, the two LDOs and the LED driver, allowing the user to power down the device when the microprocessor is no longer responding. Battery, USB, wall and high voltage input sources The LTC3577/LTC3577-1 is designed to direct power from two power supply inputs and/or a Li-Ion/Polymer battery. The VBUS input has selectable input current limit control, By combining these functions, the LTC3577/LTC3577-1 does more than just reduce the number of required ICs; it solves the problems of functional interoperability—where otherwise separate features operate together for improved end-product performance.