3A adjustable regulator using LM350
The described circuit operates efficiently as an adjustable power supply, making it suitable for various electronic applications requiring stable voltage output. The LM350K voltage regulator is capable of delivering a maximum output current of 3A, which is suitable for powering a range of devices. The thermal regulation feature of the LM350K ensures that the IC operates within safe temperature limits, preventing damage from overheating during prolonged use or under heavy load conditions.
In this design, the output voltage can be finely tuned through the use of potentiometer R2, which provides a variable resistance in the feedback loop of the voltage regulator. This allows users to set the desired output voltage within the specified range of 1.2V to 25V. The circuit's enhanced ripple rejection capability is crucial for applications sensitive to voltage fluctuations, as it helps maintain a steady output voltage even when the input voltage experiences variations.
The inclusion of diode D2 serves a critical safety function by discharging capacitor C2 in the event of a short circuit at the output. This prevents the capacitor from retaining charge, which could potentially lead to further damage to the circuit components or connected loads. The overall design is not only effective in regulating voltage but also prioritizes safety and reliability, making it a valuable addition to any electronic project requiring adjustable power supply capabilities.This is the circuit diagram of a 3A adjustable power supply using IC LM350K. LM350K is a very rugged voltage regulator IC with features like thermal regulation, short circuit protection etc. This circuit is designed as per the application notes in the data sheet and was found to be working very fine.
This circuit has improved ripple rejection and b etter stability compared to the elementary voltage regulator using the same IC. The output voltage can be adjusted by using the POT R2. By adjusting R2 the output voltage can be varied between 1. 2V and 25V. The diode D2 discharges capacitor C2 when the output is shorted. 🔗 External reference
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