DC Laptop Computer PSU/Adapter for Car

Operate your laptop from a car can be done easily if you have a DC to DC Converter, namely a power supply device for changing a DC voltage into another DC voltage is greater (step-up) or smaller (step-down). Changes in output voltage is usually followed by changes that accompany the current. This Step-up DC-DC converter circuit is to be more easily understood, then known as a laptop computer PSU/adapter for the car.
Laptop Computer PSU (Power Supply Unit) to change the voltage of DC adapter car battery to keep the output voltage of about 19V DC with a tolerance of +/ – 0.5V. Input voltage required by the car battery adapter for laptops this can work well between 9.2V-15V, and can supply 5A continuous current with brief excursions up to 10A.

Laptop Computer PSU Circuit Diagram

Car Laptop Computer PSU Circuit Schematic

Laptop computers PSU using SMPS Controller IC UC3843 in the design, which is the fixed frequency current-mode PWM controller. It’s specially designed for Off-Line and DC to DC converter applications with minimum external components. For the voltage amplifier transistors, a pair BD139/BD140 used as a driver for strengthening the IRL2505 MOSFET final transistor.
Use a car cigarette lighter socket on a voltage input section and just plug into the socket. Then use a standard laptop voltage connector and connect at the output voltage circuit. The next step is measuring the voltage output on a laptop computer PSU/adapter circuit. If there is a nominal voltage of 19V DC, It’s ready using the computer PSU.
Read more: Auto Battery Charger – Backup Power Supply

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