The TDA2005 is a very popular audio amplifier chip that many of us have used for years in car stereos and home DIY amplifiers. While it is mainly built to amplify AF signals, its internal design is actually strong enough to be used for other interesting projects like this DC-to-DC converter. By using the two amplifier channels inside the chip to create a high-frequency signal, we can turn the IC into a power driver that works with a rectifier circuit. Prototype version of TDA2005 DC-to-DC converter. The way this circuit works is quite simple. The TDA2005 stages ( U1A and U1B ) are set up to produce a high-frequency AC signal. This signal goes through 2200µF coupling capacitors and then into a full-bridge rectifier made of 1N5822 Schottky diodes. I chose these specific diodes because they have a very low voltage drop, which helps keep the efficiency high. To keep the TDA2005 stable while it drives this kind of load, I included 1Ω resistors and 0.1µF capacitors as stability network...
This blog contains electronic, amateur radio, and embedded system projects, which I did during my free time. Unless otherwise noted, all the articles and projects described on this blog are based on my original designs.