| No | Part number | Description ( Function ) | Manufacturers | |
| 3 | TOP209 | Three-terminal Off-line PWM Switch ® TOP209/210 TOPSwitch Family Three-terminal Off-line PWM Switch Product Highlights Cost Effective Switcher for Low Power Applications • Replaces linear power supplies • Replaces discrete switcher and 20 to 50 components – cuts cost, increases reliability • Stand-by power supplies for Green or energy efficient products such as personal computers, monitors, UPS, copier |
 Power Integrations Inc. |
|
| 2 | TOP209G | Three-terminal Off-line PWM Switch ® TOP209/210 TOPSwitch Family Three-terminal Off-line PWM Switch Product Highlights Cost Effective Switcher for Low Power Applications • Replaces linear power supplies • Replaces discrete switcher and 20 to 50 components – cuts cost, increases reliability • Stand-by power supplies for Green or energy efficient products such as personal computers, monitors, UPS, copier |
Power Integrations Inc. |
|
| 1 | TOP209P | Three-terminal Off-line PWM Switch ® TOP209/210 TOPSwitch Family Three-terminal Off-line PWM Switch Product Highlights Cost Effective Switcher for Low Power Applications • Replaces linear power supplies • Replaces discrete switcher and 20 to 50 components – cuts cost, increases reliability • Stand-by power supplies for Green or energy efficient products such as personal computers, monitors, UPS, copier |
Power Integrations Inc. |
|
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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