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Bench Top Power Supply Auto-Fan - (circuit added 9/04) |
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Bench Top Power Supply Part 1 - (circuit added 9/04) |
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Bench Top Power Supply Part 2 - (circuit added 9/04) |
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Bench Top Power Supply Part 3 - (circuit added 9/04) |
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Bench Top Power Supply Part 4 - (circuit added 9/04) |
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Boosted LM317/LM337 Regulators - Transistors types have been altered to ones that
are more readily available. ….(electronic schematic added 11/08) |
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Boosting Regulator Current - Although 78xx series of voltage regulators are
available with different current outputs, you can boost available current output
with this circuit. A power transistor is used to supply extra current to load
regulator, maintaining a constant voltage. Currents up to 650mA will flow
through regulator, above this value and power transistor will start to
conduct, supplying.... (added 10/05) |
Dual Polarity Power Supply - This dual polarity power supply is easy to build,
requires few parts, and is adjustable from 0-15 volts. It is great for powering op amp
circuits, as well as other circuits that require a dual supply voltage.
….(design added 08/08) |
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Dual Polarity supply provides ±12V from one IC - 04/29/04 EDN Design Ideas /
(added 1/05) Well-regulated, dual-polarity power supplies find wide use in
disk-drive, handheld-device, automotive, and notebook-computer applications. In these
applications, board space and allowable component heights are continually shrinking.
So, power-supply designers face the challenge of providing split rails with as .... |
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Dual Regulated Power Supply - In this circuit, the 7815 regulatates the positive
supply, and the 7915 regulates the negative supply. The transformer should have a
primary rating of 240/220 volts for europe, or 120 volts for North America.
….(electronic schematic added 08/08) |
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Dual Regulated PSU - (electronic design added 6/07) |
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Dual Voltage Regulator meets USB Power needs - 08/19/04 EDN Design Ideas /
(added 1/05)This Design Idea stems from the limited availability of IC voltage
regulators that can meet key USB-power specs, coupled with the need for turn-on
sequencing and rise-time control at each output. As always, for PC-related designs,
minimum cost is a primary motivation. USB specs require all loads to limit inrush
current to less than 100 mA plus 50 µC of charge when powered |
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Finesse Regulator Noise - System designers often find themselves battling power
supply hum, noise, transients, and various perturbations wreaking havoc with low noise
amplifiers, oscillators, and other sensitive devices. Many voltage regulators have
excessive levels of output noise including voltage spikes from switching circuits and
high flicker noise levels from unfiltered references.....(electronic circuit added
7/03) |
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High Current LM317 Regulated Power Supply - The high current regulator below uses
an additional winding or a separate transformer to supply power for the LM317
regulator so that the pass transistors can operate closer to saturation and improve
efficiency. For good efficiency the voltage at the collectors of the two parallel
2N3055 pass transistors should be close to the output voltage. ….(design added 11/08) |
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Hot Swap and Blocking FET Control using 2 x ADM1073 Hot Swap Controllers - AN-694
Analog Devices Application Note (app note added 6/06) |
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Hot Swap and Buffer I2C Buses - DN263 Design Notes (Linear Technology) (app
note added 6/06) |
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Hot Swap Circuit Meets Infiniband Specification - DN265 Design Notes (Linear
Technology) (app note added 6/06) |
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Hot Swap Controller Handles Dual Polarity - 12/11/03 EDN Design Ideas /
(added 1/05) Some applications require a hot-swap controller, a circuit-breaker
function, or both for dual-polarity, dc-input power-supply rails. In some hot-swap
cases, the requirement is based only on inrush-current considerations. Control of the
inrush .... |
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Hot Swap Push-Pull Sync. Buck Negative Flyback Dual Sync. Buck Reference Design -
Hot Swap, Push Pull, Sync. Buck, Negative Flyback, Dual Sync. Buck with Vin of -36 V
to -72V. Vout of 8 V, 5 V, 3.3 V, 2.5 V and -5 V. The output power is 79.5 W.
(added 6/06) |
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Hot swap structure offers improved redundancy - 01/09/03 EDN-Design Ideas /
(added 6/06) For redundancy purposes, a number of power supplies, using ORing diodes,
can work into the same load. During maintenance, when you can remove any power supply,
the minimum possible power perturbation at the load is desirable. To compensate ... |
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Hot Swapping the PCI Bus - DN155 Design Notes (Linear Technology) (app note
added 6/06) |
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Hot-Plug and Hot-Swap Bus Switches - Pericom Semiconductor Application Note # 052
(app note added 2/05) |
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Hot-swap circuit allows two computers to monitor an RS-232 channel - (Design Ideas
- EDN, 5/29/2008 A hot-swap serial-interface circuit allows two computers to
monitor all the traffic on an RS-232 port. (electronic design idea added 06/07/08) |
