Boost Regulator Current: Design Your 1500mA Circuit

Description

Voltage stabilizers like the LM708, and LM317 series (and others) occasionally require a slightly increased current output than their capabilities. In such situations, this particular circuit can offer a solution. A power transistor such as the 2N3772 or a comparable device can be incorporated.

The power transistor is utilized to augment the additional current demanded above the maximum current rating supplied by the stabilizer.

Current levels up to 1500mA (1.5amp) will flow through the regulator, exceeding this amount causes the regulator to operate beyond its limits and adds the necessary extra current to the output load. Stacking multiple power transistors is permissible for even higher current requirements (see diagram). Both the regulator and power transistor must be affixed to an appropriate heatsink.

Circuit diagram:

Parts:

Integrated Circuits (ICs) – Detailed Description

78xx Regulator

The 78xx series of integrated circuits are three-terminal positive voltage regulators. They are widely used to provide a stable 5V DC output from a higher input voltage. These regulators are designed for low-current applications and are characterized by their simplicity and efficiency. They typically operate with a heat sink to dissipate heat generated during operation. The 78xx series is characterized by its positive voltage regulation and is commonly found in various electronic circuits needing a regulated 5V supply.