Utilizes an older self-oscillating design for the startup circuit, rather than a separate auxiliary chip, which reduces component count and cost. 2. Main Sections of the Circuit Diagram The circuit can be broken down into three primary stages: Input Stage (EMI Filter & Rectification) Switching Stage (Half-Bridge Converter) Output Stage (Rectification & Filtering) 2.1. Input Stage (EMI Filter & Rectification)
| Parameter | Value | | :--- | :--- | | | S-360-12 | | DC Output Voltage | 12V | | Rated Output Current | 30A | | Output Power | 360W | | Output Voltage Adjustable Range | 10V ~ 13.2V (±15%) | | AC Input Voltage Range | 90~132VAC / 180~264VAC (Selectable) | | Input Frequency | 47~63Hz | | Input AC Current | 6.5A / 115V ; 4A / 230V | | Inrush Current | Cold start: 50A / 115V, 50A / 230V | | Efficiency | >74% (Typical) | | Ripple & Noise | 150mVp-p (Max) | | Protections | Short circuit / Overload / Over voltage | | Voltage Tolerance | ±1% | | Dimensions (L W H) | 215 115 50mm | | Weight | 1 kg (2.2 lbs) |
+--------------+ +--------------------+ +-------------------+ 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
The high-voltage DC is fed into two large NPN power transistors (often series) mounted on a primary-side heatsink. s36012 power supply circuit diagram
The is a widely used, budget-friendly 360-watt Switch Mode Power Supply (SMPS) that converts standard 110V or 220V AC mains voltage into a regulated, high-current 12V DC output at up to 30A . To view or download the complete diagnostic schematic files for troubleshooting, you can reference the community-contributed Elektrotanya S-360-12 Service Manual or alternative document archives found on Scribd's S-360-12 Schematic Pool .
: High ripple voltage or dropping amperage capacity usually means the secondary electrolytic filter capacitors have failed or dried out due to heat. Replace them with high-quality, low-ESR variants rated for 105∘C105 raised to the composed with power C
: The main primary switching transistors (13009) or the main input bridge rectifier have suffered a short circuit. Replace both transistors, inspect their accompanying base resistors, and test the rectifier block. Utilizes an older self-oscillating design for the startup
Due to its robust power output, the S-360-12 is a versatile power source for many projects and systems:
A common reason for seeking out the circuit diagram is to repair a non-functional S-360-12. While internal repairs are only for qualified individuals, a basic understanding can aid in diagnosis.
Converts AC to high-voltage DC (roughly 310V DC for a 220V input). Input Stage (EMI Filter & Rectification) | Parameter
Shorted Schottky diode on the output side, or a short circuit in your load. Feedback loop failure or dried-up caps.
The filtered AC enters a heavy-duty integrated bridge rectifier package.
This table summarizes the primary electrical and physical characteristics of the power supply, providing a clear benchmark for its performance and capabilities.
The AC mains (Live "L" and Neutral "N") first passes through an Electromagnetic Interference (EMI) filter. This filter, comprised of X/Y capacitors and common-mode chokes, suppresses high-frequency noise from the power supply from feeding back into the main power grid and protects the supply from incoming line noise.