Fixed Voltage Power Supply
A fixed voltage power supply typically consists of a transformer, a rectifier, a filter capacitor, and a voltage regulator. The transformer steps down the AC mains voltage to a lower AC voltage suitable for the desired output. The choice of transformer is critical, as it determines the output voltage and current capabilities.
The rectifier, often implemented using a bridge configuration with diodes, converts the AC voltage from the transformer into pulsating DC voltage. This pulsating DC is not suitable for most applications, so a filter capacitor is used to smooth the output voltage. The capacitor charges and discharges to reduce voltage ripple, providing a more stable DC voltage output.
The voltage regulator is responsible for maintaining a constant output voltage despite variations in load current or input voltage. Common types of voltage regulators for fixed voltage applications include linear regulators, such as the 78xx series, and low-dropout (LDO) regulators. The selection of the regulator will depend on the desired output voltage, current rating, and efficiency requirements.
In this design, the maximum output current is specified as 1.5A. This indicates that the components, particularly the transformer and regulator, must be rated to handle this current without overheating or failing. Proper heat dissipation measures, such as heat sinks, may be necessary for the voltage regulator to ensure reliable operation.
Overall, the fixed voltage power supply is an essential component in many electronic devices, providing a stable and reliable power source for various applications.The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and transformer you choose. The maximum output current is 1.5A. 🔗 External reference
Related Circuits
This document presents a basic electronics project focused on creating a regulated power supply. A regulated power supply is essential for various electronic circuits, as it provides a constant voltage necessary for their operation. Understanding how to construct a...
The power windows operate slowly, but connecting 12 volts directly to the motors allows them to function properly. A previous discussion mentioned using a common 5-pin ice cube relay, but there was no confirmation of its effectiveness. The power...
The FM302E-I-type FM transmitter exciter is manufactured by NEC Corporation, Japan, and features a 1210 motherboard. It utilizes direct frequency modulation of the carrier signal, employing phase-locked frequency stabilization and frequency synthesis techniques. The front power amplifier is based...
This is the circuit diagram of a USB-powered computer speaker, commonly referred to as multimedia speakers for PCs. The circuit features a single-chip design, operates on a low-voltage electrical power supply, is compatible with USB power from computers, includes...
An LM386 audio power IC is configured as a feedback oscillator. It can operate with a supply voltage ranging from 6 to 12 V. The circuit is capable of driving a loudspeaker. The LM386 is a low-voltage audio power amplifier...
This circuit will supply up to approximately 20 mA at 12 volts. It utilizes capacitive reactance instead of resistance and does not generate significant heat. The described circuit operates as a capacitive power supply, which is an efficient method to...