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Boost / Step Up Power Supplies, Page 2
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Last Updated on:
Saturday, April 26, 2008 07:30 AM |
| Boost,
Buck, Buck-Boost,
Switchmode |
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Power Supplies -- Main Page
Converters -- Main Page |
| Links to
electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
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0.6/1.6 MHz Boost Converters with 22V Inrternal FET Wsitch
in SOT-32: National Semiconductor Application Note LM2731 July 2003 (app note added 7/06) |
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1 Watt 5 Volts Power Booster for the MLX90121: Melexis
Application Note (app note added 2/06) |
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2-Phase Boost Converter Delivers 10W from a 3mm x 3mm DNF Package: DN354
- Design Notes (Linear Technology) (app note added 1/06) |
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2-Transistor Amplifier: A simple two-stage Amplifier. Use any general-purpose NPN with high gain. It will drive low impedance
headphones directly. A speaker will probably require further boost. (added 10/05) |
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3
Output TFT LCD Bias Supply with a Boost Regulator - MP1542 - DN0005: Monolithic Power Systems, Inc - Design Note - (added 6/06) |
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3.3V
converter delivers 3W from Li-ION battery : 11/05/98 EDN-Design Ideas / (added 11/05) Lithium-ion batteries are rapidly
gaining popularity in portable applications because of their superior energy density, low self-discharge rate, and high cell voltage. When you
use one Li-ion battery to power a 3.3V dc/dc converter; however, you encounter a problem, because the battery voltage can be higher or lower
than 3.3V. When fully charged, a Li-ion cell has approximately 4.2V output; when fully discharged, the voltage is approximately 2.5V.
Therefore, you cannot use a simple buck or boost topology with a single inductor to generate a regulated 3.3V output. Some designs boost the
voltage to approximately 4.3V and then use a low-dropout regulator to produce the 3.3V. This approach is inefficient, and efficiency is a
crucial consideration in battery-powered applications. The circuit in Figure 1 offers a solution to the problem.... |
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3-Band Equalizer: Using a single op-amp this easy to make equalizer
offers three ranges, low frequency, mid frequency, and high. With component values shown there is approximately +/-20dB of boost or cut at
frequencies of 50Hz, 1kHz and 10kHz. Supply voltage may be anything from 6 to 30 Volts. Maximum boost 20dB is only realized with maximum
supply voltage. (added 4/05) |
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3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny
MSOP Package: DN246 - Design Notes (Linear Technology) (app note added 2/06) |
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4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A with Output Disconnect
in a 5mm x 5mm QFN Package: DN332 - Design Notes (Linear Technology) (app note added 2/06) |
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500kHz 6monolithic Boost Converter (LT1370): DN183 - Design Notes
(Linear Technology) (app note added 1/06) |
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