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Buck / Step Down Power Supplies, Page 2
Buck: Page 1, Page 2,
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Boost,
Buck, Buck-Boost,
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Power Supplies -- Main
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Converters -- Main Page
Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Boost Controller Drives Buck Converter - 02/03/97 EDN-Design
Ideas....By adding an external Switching Transistor, you can use a step up
dc/dc Converter to step down voltages to produce an efficient Battery
Powered Power Supply, this example Circuit can step down inputs as Low....
[Design Idea by Michael Keagy, Maxim Integrated Products, Sunnyvale, CA] |
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Buck boost regulator suits battery operation - 4-Sep-03 Issue of
EDN A buck/boost converter can step a voltage up or down. Such a
converter is appropriate for battery-powered applications. One application
derives.... [Design Idea by Kahou Wong, On Semiconductor, Phoenix, AZ] |
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Buck Configuration High-Power LED Driver - Microchip Application
Note Published 4-Jan-06....[App Note] |
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Buck Converter - (application / block diagram added 6/07)
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Buck converter charger also provides system power - 05/22/97 EDN-Design
Ideas....Switching Regulator provides charge voltage setpoint with
Current regulation, and second Switching Regulator provides5V.... [Design
Idea by Robert Hanrahan, National Semiconductor, Woodcliff Lake, NJ] |
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Buck converter handles battery-backup system - 24-Apr-03 Issue of EDN
A synchronous buck converter is inherently bidirectional. That is, it transfers energy
from input to output as a buck regulator when the output voltage is low, but, when the
output voltage is high, the converter acts as a boost regulator, transferring power
from output to input. This Design Idea shows how to use this bidirectional
energy transfer to automatically recharge a battery when the mai.... [Design Idea by
Haresh Patel, Linear Technology Corp, Milpitas, CA] |
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Buck converter uses low side PWM IC - 19-Mar-09 Issue of EDN A
voltage-level shifter lets you control voltages above a PWM controller's power
source.... [Design Idea by L Haachitaba Mweene, PhD, National Semiconductor Corp,
Richardson, TX] |
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Buck converter works efficiently from phone line - 02/15/00 EDN-Design
Ideas.... EDN is migrating links. This link is not verified. Search the "title"
EDN for new link. |
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Buck Converter-AC Model - We've already developed a SPICE model for the Buck
Converter in a voltage control loop. The controller performed brilliantly holding the
output steady under varying load conditions. However, closing the loop is fraught with
danger! Without proper insight, Vo can start ringing and oscillating out of
control....(spice design added 02/09) |
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Buck IC boosts battery-voltage for white LED - 24-Apr-03 Issue of EDN
White-light LEDs are finding their way into many markets that incandescent bulbs once
served. Flashlights are among the newer applications in which reliability, ruggedness,
and ability to control the power draw of the LEDs make these devices attractive. With
incandescent bulbs, the power management for the device is a simple on-off switch....
[Design Idea by Robert Kollman, Texas Instruments, Dallas, TX] |
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Buck or Boost: Rugged Fast 60V Synchronous Controller Does Both - DN370
Design Notes (Linear Technology) (app note added 1/06) |
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Buck regulator and two inductors make dual polarity converter - 20-Mar-03
Issue of EDN A common problem for power-supply designers is to create a compact,
dual-polarity step-down converter. If space and cost are not concerns, the obvious
solution is a pair of dc/dc converters, one for each output. But space and cost are
almost always issues for communications, data-acquisition, and disk-drive
applications.... [Design Idea by Keith Szolusha, Linear Technology Corp, Milpitas, CA] |
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Buck regulator forms high power, inverting –5V supply - 1-Apr-04 Issue of
EDN Configuring a step-down switching-converter IC as an inverter yields an
efficient, high-power, -5V supply that can of deliver currents as high as 4.5A at the
12V input or 3.2A at the 5V input (Figure 1]. Conventional inverting power supplies do
their switching using a p-channel MOSFET (Figure 2]. That configuration works well at
lower currents, but has limited use above approximately 2A, depend.... [Design Idea by
Bruce Denmark, Maxim Integrated Products, Sunnyvale, CA] |
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Buck Regulator Generates Flexible VTT for PECL - 08/15/97 EDN-Design
Ideas....Circuit to generate Output which can both Source and Sink Current -The
positive emitter-coupled logic (PECL]in most high-speed clock-distribution and
-recovery circuits requires a termination voltage, VTT, that imposes special
requirements on VTT supply. First, typical switching thresholds for PECL
must refer to VDD.... [Design Idea by Bruce D Moore, Maxim Integrated Products,
Sunnyvale, CA] |
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Buck regulator operates without a dedicated clock - 21-Aug-03 Issue of EDN
Most switching regulators rely on a dedicated clock oscillator to determine the
switching frequency of operation. A dedicated oscillator circuit within the power
controller usually generates the clock signal. A class of hysteretic switching
regulators can actually operate at a relatively fixed frequency without a clock, even
with changing input-line and output-loading conditions.... [Design Idea by Robert
Bell, National Semiconductor, Phoenix, AZ] |
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Buck Regulator Terminates Fast Data Buses - 07/20/95 EDN-Design Ideas The
limitations of 5 and 3.3V CMOS buses are spurring the development of high-speed,
low-voltage buses for the next generation of computers. These buses, such as Futurebus
and Rambus, require low-voltage supply rails to reduce signal-voltage swings. Other
buses, such as CTT (center-terminated transceiver) and HSTL (high-speed transceiver
logic), have center termination and, therefore, require a power source that can sink
current as well as source it.... [Design Idea by Bruce Moore, Maxim Integrated
Products, Sunnyvale, CA] |
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Buck Regulator uses Step Up Controller - 11/09/95 EDN-Design Ideas....The
circuit in Fig 1uses a step-up (boost) dc/dc controller in a negative buck-regulator
application. The circuit’s function is to power the laser diode in an optical
amplifier/booster unit, a job for which no commercial IC is available. The anode of
the laser diode connects to ground, so the supply voltage must be negative and must
deliver 160 to 750 mA. Although the boost-regulator IC operates in a buck-regulator
circuit, its standard connections permit proper control of Q1. However, you need an op
amp.... [Design Idea by Massimo De Marco, Maxim Integrated Products Cusano Milanino,
Italy] |
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Buck:
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Page 3, Page 4,
Page 5
Power Supplies -- Main
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Converters -- Main Page |
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