5V/10A 50W Offline Switching Power Supply
The 50W offline switching power supply circuit is a crucial component in various electronic systems, converting high-voltage AC input into a stable low-voltage DC output. The circuit employs a switching topology, which enhances efficiency and reduces heat generation compared to linear power supplies.
The primary components of this power supply include the MOSFETs, which act as the main switching elements. The BUZ80A/IXTP4N8 is utilized for circuits operating at 220V AC, while the GE IRF823 is selected for those operating at 110V AC. These MOSFETs are chosen for their high-speed switching capabilities and low on-resistance, allowing for efficient operation and minimizing power loss.
The circuit typically incorporates a transformer for voltage step-down and isolation, followed by a rectification stage to convert the AC output from the transformer into pulsating DC. This is often achieved using a bridge rectifier configuration. After rectification, the output is smoothed using filtering capacitors to reduce ripple voltage, ensuring a stable 5V DC output.
In addition to these components, a feedback mechanism is usually integrated to regulate the output voltage. This feedback loop monitors the output voltage and adjusts the switching duty cycle of the MOSFETs to maintain a consistent 5V output, even with variations in load or input voltage.
Safety features such as over-voltage protection, over-current protection, and thermal shutdown mechanisms are commonly included in the design to enhance reliability and prevent damage to the circuit and connected devices. Overall, this 50W offline switching power supply circuit design represents a robust solution for providing efficient power conversion in a compact form factor.The following diagram is the 50W offline switching power supply circuit design. The circuit powered by a MOSFET. BUZ80A/IXTP4N8 for 220V AC voltage input and GE IRF823 for 110V AC input voltage. The output will be 5VDC with electric current.. 🔗 External reference
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