5V 3A Regulate power supply by TIP2955

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If you require more than 1 amp, the 7805 can be combined with other components to provide an output of up to 3 amps, with the circuit below. The current is switched through the TIP2955, so the 7805 can be run without a heatsink since it only regulates the voltage. Note the 3-amp diodes in the power supply.
For currents greater than 3 amps, additional TIP 2955 transistors can be “piggy-backed” on top of the TIP in the circuit. If the gain of each transistor is approximately the same, the transistors will current-share the load and get equally hot.

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This entry was posted on Thursday, March 6th, 2008 at 12:28 pm and is filed under Power supply. You can follow any responses to this entry through the RSS 2.0 feed.