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Method provides fast glitch free isolation of I 2 C & SMBus Signals - 06/24/04 EDN-Design
Ideas: I 2 C is a popular serial protocol for power controllers, ADCs and DACs,
EEPROMs, and other devices. In certain data-acquisition and power-control situations,
you must isolate the I2C master from one or more slave devices for noise,
grounding,.....(design idea added 2/05) |
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Method provides overpower protection for quasiresonant supplies - 10/28/04 EDN-Design
Ideas: The main characteristic of quasiresonant switch-mode power supplies is that
they exhibit a varying frequency when the input voltage changes. (design idea
added 1/05) |
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Methods Reduce Input Ripple for All Charge Pumps - Maxim Application Note #2027
(app note added 5/08) |
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MicroController delivers voltage multiplied DC power - 05/11/06 EDN-Design Ideas:
Use the microcontroller's comparator and PWM blocks to form a simple inductor-based
boost converter.....(design idea added 9/08) |
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Miniature Precision Negative Reference Requires No Precision Resistors - Maxim App
Note #824 (app note added 5/08) |
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Negative Supply from single positive Supply - Opamps are very useful. But one of
their major drawbacks is the requirement of a dual supply. This seriously limits their
applications in fields where a dual supply is not affordable or not practicable. This
circuit solves the problem to a certain extent. It provides a negative voltage from a
single positive supply. This negative voltage together with the positive supply....
(added 10/05) |
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Negative Voltage Generator - takes in +12V and outputs around -11V (added 4/02) |
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Negative Voltage Load Switch - The good thing about this design is that i can make
use of the system i/o voltage to control the on/off and this is the whole idea.
However, there are many many type of load switches that turn of negative voltages….
(added 3.06) |
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Network Linearizes DC/DC Converter's Current Limit Characteristics - 10/13/05 EDN
-Design Ideas Thermistor adds to efficiency, eliminates sense
resistor.....(design idea added 11/05) |
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One 9 Volt Battery Gives +18 +25 +33V - This circuit is based on MAX1044 is a
charge pump converter. (added 4/02) |
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Power over Ethernet: Sync Flyback Reference Design - This reference design
presents an alternative to the typical boost power regulator. A buck converter IC is
used to generate a higher voltage needed by the white light LED power from a Ni-Cd
battery. This circuit operates by turning the high switch on, connecting the battery
voltage across the inductor..... (added 3/05) |
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Power Supply (psu 1) - (electronic circuit added 4/05) |
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Power Supply Fits into Small Spaces - 11/13/03 EDN-Design Ideas: The demand for
negative-voltage power supplies is increasing with the popularity of applications for
portable devices. It can be expensive and relatively complicated to generate a
negative supply from a positive input source, especially when the design requires both
positive and negative outputs.....(design idea added 1/05) |
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Pulsing Charge Pump Drives Capacitive Loads - 11/05/98 EDN-Design
Ideas:.....(design idea added 6/06) |
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Reduce EMI By Sweeping a Power Supply's frequency - 05/27/04 EDN-Design Ideas:
Switching power supplies can be notorious noise generators. You should prevent this
noise, which is conducted, Radiated, or both, from returning to the input source,
where it can potentially wreak havoc on other devices operating from the same input
power.....(design idea added 02/05) |
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Regulated 12V Supply (Mick Devine) - This circuit above uses a 13 volt zener
diode, D2 which provides the voltage regulation. Aprroximately 0.7 Volts are dropped
across the transistors b-e junction, leaving a higher current 12.3 Volt output supply.
This circuit can supply loads of up to 500 mA. This circuit is also known as an
amplified zener circuit. (added 10/05) |
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Regulated Charge Pump Delivers 50ma - Maxim Application Note #35 (app note added
5/08) |
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Regulated Step Up Converter Provides High Efficiency Without Inductors - Maxim
Application Note #44 (app note added 5/08) |
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Self Modifying Code Extends Addressing Mode - 12/17/98 EDN-Design Ideas: As just
about any assembly-language programmer knows, self-modifying code (SMC)is usually
undesirable, unintentional, and destructive. However, the SMC routine in Listing 1 is
extremely useful to extend the indexed, 16-bit offset addressing mode of the venerable
HC05 µC from 8 bits,.....(design idea added 03/05) |
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Simple +5V Power Supply Circuit - (electronic circuit added 4/05) |
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Simple Circuit Provides +5 Volt Gate Bias From 48 Volt Input - Maxim
Application Note #1803 (app note added 5/08) |
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Simple DC/DC Converter Increases Available Power in Dual Voltage System - 01/08/04
EDN-Design Ideas: The schematic in Figure 1 shows a way to increase the power
available from a current-limited 5V supply by adding power from a -5V supply. The
dc/dc converter generates a single 12V, 150-mA (1.8W)output from two.....(design idea
added 1/05) |
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Simple Methods Reduce Input Ripple for All Charge Pumps - Maxim Application Note
#2027 (app note added 5/08) |
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Simple Power Supply - (electronic circuit added 4/05) |
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Simple Power Supply Fits into Small Spaces - 11/13/03 EDN-Design Ideas: The demand
for negative-voltage power supplies is increasing with the popularity of applications
for portable devices. It can be expensive and relatively complicated to generate a
negative supply from a positive input source, especially when the.....(design idea
added 1/05) |
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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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Simple technique improves transient dynamics - 06/24/99 EDN-Design Ideas:
Designing low-voltage, high-current converters with fast dynamic performance places
stringent demands on a system designer. However, a simple technique reduces the peak
voltage deviation and decreases the response time for a transient load step....(added
2/06) |
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Supplying Power via the1 Wire Bus - Maxim App Note #949 (app note added 5/08) |
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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 Capacitor IC & Reference Form Elegant48 to +10V Converter - 04/24/03 EDN-Design
Ideas: A system designer must almost always face a trade-off in choosing the right
part for an application. The trade-off usually involves performance, price, and
function. An example is the issue of powering circuits from a telecom-voltage source.
Telecom systems almost exclusively use high-potential negative rails, such as
48V.....(design idea added 1/05) |
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Switching Power Supply - 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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Synchronous Buck Reference Design - This reference design is a 5Vdc input to 1.65V
@ 1A output synchronous buck converter. The controller is the TPS40003 operating at
600KHz. The controller features Predictive Gate Drive, which minimizes the bottom FET
body diode conduction time. This provides the benefit of increased efficiency when
compared to a standard gate drive method.... (added 3/05) |
