S36012 Power Supply Circuit Diagram Hot! -
12V DC (manually adjustable from 10.8V to 13.2V via an onboard trimmer potentiometer)
is a widely used 360W switching mode power supply (SMPS) that converts AC input (110V/220V) to a regulated 12V DC output
The S-360-12 is serviceable, but high-voltage DC inside makes it dangerous to work on while plugged in. s36012 power supply circuit diagram
Absorbs voltage spikes and surges from the grid.
The low-voltage, high-frequency AC coming off the secondary winding must be converted back to clean DC. 12V DC (manually adjustable from 10
High-voltage NPN transistors forming the half-bridge inverter. TL494, KA7500 Pulse Width Modulation (PWM) controller. Output Rectifiers Schottky Diodes (e.g., MBR30100) Rectify high-frequency AC to DC. Voltage Adjustment Potentiometer Adjusts output voltage by 4. Understanding the "S-360-12" Input Switch
High-power drop resistors draw a small current directly from the high-voltage DC bus to initialize the PWM chip. Voltage Adjustment Potentiometer Adjusts output voltage by 4
A large ferrite-core transformer steps down the voltage.
+--------------+ +--------------------+ +-------------------+ Mains | EMI Filter | --> | Bridge Rectifier & | --> | Half-Bridge | AC In | & Protection| | Voltage Doubler SW | | Switching Stage | +--------------+ +--------------------+ +-------------------+ | v +--------------+ +--------------------+ +-------------------+ DC Out | Output Noise | <-- | Schottky Rectifier | <-- | High-Frequency | Term. | & LC Filter | | & Smoothing Cap | | Transformer | +--------------+ +--------------------+ +-------------------+ | ^ | +------------------+ | +-------------> | PWM Controller & | --------------+ (Feedback) | Optocoupler Loop | +------------------+ 1. AC Input Protection and EMI Filtering
Protects the entire system against catastrophic overcurrent or short circuits.
Low-ESR electrolytic capacitors combined with a toroidal inductor choke smooth out the remaining high-frequency ripples, delivering a clean 12V DC output. 6. The Feedback Loop