This is a design document of DVD player power supply. It introduces the design features of the TinySwitch-PK multiple output power supply, including output power, input voltage, output voltage, power supply topology, etc.
The DI-115 TinySwitch‑PK is a wide‑range, multiple‑output flyback power supply designed for DVD players and set‑top boxes. It delivers 7.5 W continuous and 13 W peak output power from an 85‑265 VAC input, providing regulated 3.3 V, 5 V, 12 V and –12 V outputs. Key design features include excellent cross‑regulation, sum‑regulated dual outputs, high energy efficiency, and automatic restart after a shorted‑output condition.
The document includes detailed schematics, transformer parameters, standby‑power curves, and EMI performance data. Operating at 132 kHz in normal mode and switching to 264 kHz under peak load, the supply achieves less than 150 mW no‑load power consumption at 230 VAC and meets CEC/ENERGY STAR 2008 efficiency requirements.
| Continuous output power | 7.5 W |
|---|---|
| Peak output power | 13 W |
| Input voltage range | 85‑265 VAC |
| Output voltages | 3.3 V, 5 V, 12 V, –12 V |
| No‑load power consumption | <150 mW at 230 VAC |
| Active‑mode efficiency | 77.7 % |
| Normal switching frequency | 132 kHz |
| Peak‑mode switching frequency | 264 kHz |
| Primary inductance | 895 µH ±10 % |
| Leakage inductance (max) | 30 mH |
It provides 7.5 W of continuous output power and up to 13 W of peak power.
The supply operates from 85 VAC to 265 VAC.
The no‑load power consumption is less than 150 mW at 230 VAC.
In normal operation the converter runs at 132 kHz, and it switches to 264 kHz under peak‑load conditions.