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Self switching Power Supply - One of the main features of the regulated power
supply circuit being presented is that though fixed-voltage regulator LM7805 is used
in the circuit, its output voltage is variable. This is achieved by connecting a
potentiometer between common terminal of regulator IC and ground. For every 100-ohm
increment in the in-circuit value of the resistance of potentiometer VR1, ....
(added 10/05) |
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SIMPLE SWITCHER PCB Layout Guidelines - National Semiconductor Application Note
(app note added 2/06) |
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Simple Switching Power Supply (karl lunt) - I built a PCB for a simple switching
power supply, originally designed by Keith Payea of the SRS. It uses an LM393, a
P-channel power MOSFET, and darn little else. Since its frequency varies based on load
(and nearly everything else imaginable), you can use junk-box parts and build it for
cheap...(electronic circuit added 6/07) |
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Single FET Controls 2nd LED Array in Switchmode LED Backlight - Maxim APP1871:
Feb03,2003 / (app note added 5/08) -A design in which the display is backlit (or
frontlit) for extended periods needs an efficient circuit that drives the LEDs with a
controlled current, and eliminates the wasted power associated with current-limiting
resistors. A switch-mode boost design that regulates current instead of voltage
accomplishes this purpose. |
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Single IC Five Output Switching Power Supply System for Portable Electronics -
DN150 Design Notes (Linear Technology) (app note added 6/06) |
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SMPS Basics-The Buck Converter - ...(spice design added 02/09) |
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SMPS Power Loss - ...(spice design added 02/09) |
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Soft-Start Controller for Switching Power Supplies - Microchip Application Note
Published 29-Nov-04 (app note added 2/06) |
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SPICE Predicts Differential Conducted EMI from Switching Power Supplies - 02/03/97
EDN-Design Feature.....(design idea added 11/05) Spice not only can
predict the exact EMI levels produced by a switched-mode power supply, but also can
produce plots that allow you to easily evaluate your design and the effectiveness of
the EMI filter.—Christophe Basso, Sinard, France |
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Switch Mode Battery Eliminator Based on a PIC16C72a - Microchip Application Note
Published 25-Mar-99 (app note added 2/06) |
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Switch Mode DC Supply - The switching power supply, shown in the schematic,
provides12 volts, at10 amps, maximum, using a discrete transistor regulator with an
op-amp functioning as a comparator in the feedback circuit. The supply was constructed
in1984 and is variable frequency, as opposed to the pulse width modulator (PWM)
controllers used today. (added 4/02) |
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Switched gain OpAmp serves as phase detector or mixer - 05/01/08 EDN-Design Ideas:
By switching the disable input of an op amp at a reference frequency and lowpass-filtering
its output, you can obtain a dc voltage proportional to the phase
difference.....(design idea added 09/08) |
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Switched Mode Regulator - Battery Eliminator (circuit added 09/06) |
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Switcher Adds programmable PWM duty cycle Clamp - 09/27/07 EDN-Design Ideas: A
simple circuit adds a programmable duty-cycle clamp to an inexpensive, eight-pin PWM
power-supply controller.....(design idea added 09/07) |
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Switcher IC hikes Battery Charger's Efficiency - 06/23/94 EDN-Design Ideas: The
adjustable switching-regulator LM2575T-ADJ, IC1, in Fig 1 replaces a power-wasting pnp
transistor in the data-book design for the NiCd battery charger IC2, a MAX713. (Its
sister device, the MAX712, handles NiMH cells.)IC2 "fast-charges" cells by monitoring
the cell's voltage and charging current until they exhibit.....(design idea added
3/03) |
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Switching converter uses planar magnetics - 11/07/96 EDN-Design Ideas: Planar-magnetics
technology is growing in popularity as a design option for dc-dc converters. In
addition to providing electrical benefits, planar magnetics offers reduced leakage
inductance and improved consistency. It also significantly reduces the cost of
magnetics if you integrate it into the printed-circuit board....(added 09/05) |
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Switching regulator 2 - (electronic circuit added 4/05) |
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Switching regulator forms constant Current source - 05/30/02 EDN-Design Ideas:
Many applications require current sources rather than voltage sources. When you need a
high-current source, using a linear regulator is inadvisable, because of the high
power dissipation in the series resistor. To solve the wasted-power problem, you can
use a switch-mode regulator. The circuit of Figure 1 uses IC1, an LM2576 adjustable
regulator.....(design idea added 1/05) |
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Switching Regulator Output goes BeLow VREF - 03/17/94 EDN-Design Ideas: The
feedback arrangement of typical switching regulators doesn't allow the regulated
outputs to go lower than the reference voltage. If you try to lower the output by
modifying the feedback network, the compensation components the manufacturer
recommends may no longer stabilize the regulator's error amplifier.....(design idea
added 03/03/03) |
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Switching regulator reduces Motor brake's power consumption - 01/04/07 EDN-Design
Ideas: Inexpensive IC replaces relays and power resistsor.....(design idea added
05/06/07) |
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Switchmode Car Power Supply - Low power +/-12V supply for car preamps and
equalisers (etc) (electronic diagram added 6/07) |
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Switchmode Power Amp Supply - A high power (350W typical) car power amplifier
supply (electronic diagram added 6/07) |
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Switchmode PSU Protection - This contributed circuit can help prevent failure of
your switching power supply. (electronic diagram added 6/07) |
