Simple SMPS, 85-265VAC Input with Output 12VDC @ 750mA
This compact Switch-Mode Power Supply (SMPS) is built around the TNY266 chip, offering a cost-effective solution for various applications, including power adapters and LED drivers. The SMPS consists of a bridge rectifier, a DC bus capacitor, the TNY266 switch IC, a rectifier diode, and a PC817 optocoupler for feedback and fault condition monitoring.
The board features screw terminals for easy connection of AC input and DC output, as well as an onboard LED indicator for output voltage. Notably, no auxiliary power is required to drive the chip, making it a highly efficient design.
A simple 4-pin transformer is used, which can be readily sourced from online marketplaces such as AliExpress and eBay. This makes it an ideal solution for DIY enthusiasts and professionals alike, looking for a reliable and affordable SMPS solution.
Features
- Power Input 85-265V AC
- Output 12V, 750mA (Output +/-5%)
- Screw Terminals for AC Input and DC Output
- Operating Switching Frequency 132Khz
- 4 x 4 mm Mounting Holes
- PCB Dimensions 69.06 x 25.88 mm
Transformer
- Primary winding 0.8mH, Turn ratio 90:10
- Magnetic Core EE16, with 6Pin Bobin, Pin 1, 3 + 4,6 (Pin 2, Pin 5 NC)
- Primary 4 in 6 out, 90T, 0.2mm, 0.8mH inductance
- Secondary 1 in 3 out, 11T, 0.5mmx2 double-wire winding
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This compact Switch-Mode Power Supply (SMPS) is built around the TNY266 chip, offering a cost-effective solution for various applications, including power adapters and LED drivers. The SMPS consists of a bridge rectifier, a DC bus capacitor, the TNY266 switch IC, a rectifier diode, and a PC817 optocoupler for feedback and fault condition monitoring.
The board features screw terminals for easy connection of AC input and DC output, as well as an onboard LED indicator for output voltage. Notably, no auxiliary power is required to drive the chip, making it a highly efficient design.
A simple 4-pin transformer is used, which can be readily sourced from online marketplaces such as AliExpress and eBay. This makes it an ideal solution for DIY enthusiasts and professionals alike, looking for a reliable and affordable SMPS solution.
Features
- Power Input 85-265V AC
- Output 12V, 750mA (Output +/-5%)
- Screw Terminals for AC Input and DC Output
- Operating Switching Frequency 132Khz
- 4 x 4 mm Mounting Holes
- PCB Dimensions 69.06 x 25.88 mm
Transformer
- Primary winding 0.8mH, Turn ratio 90:10
- Magnetic Core EE16, with 6Pin Bobin, Pin 1, 3 + 4,6 (Pin 2, Pin 5 NC)
- Primary 4 in 6 out, 90T, 0.2mm, 0.8mH inductance
- Secondary 1 in 3 out, 11T, 0.5mmx2 double-wire winding
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