Switching Power Supply Schematic

Variable Switching Power Supply Schematic

Here is a switching power supply schematic using an IC power step-down switching regulator L296 (P), which can deliver currents in voltage 20V 4A. The output voltage can be adjusted within the range of 0V to 40V. You can quite easily build this switching power supply circuit.

You can see more clearly in the switching power supply schematic, a diagram of the IC pin on pin 12, 13, and 14, there is configuration Reset Input, Reset Delay, and Reset Output. So you actually do the design details for power supply circuit into a programmable power supply by using the microprocessor.

In addition to the above features including soft start, thermal protection, remote inhibit, and a PWM comparator input for synchronization in multichip configurations. (see L296 datasheet).

Voltage and current limits on the power switching regulator can be adjusted. In the switching power supply schematic below is in P3 and P2 for voltage regulation, P1 for limiting the current. While Efficient operation at switching frequencies up to 200 KHz allows a reduction in the size and cost of external filter components. You can adjust the switching oscillator frequency of the switching power supply schematic in C1 R4 (around 208 KHz).

Switching Power Supply Schematic

You should take special care when purchasing to choke. Its ferrite material should be built for frequencies up to 300kHz. Input to the regulator can be DC or AC voltage because the input is the rectifier bridge. See the type of choke in the switching power supply schematic.

Read more about Programmable Power Supply – Variable DC Power Supply Circuit.