TOP223P Offline PWM Switching Power Supply 5.7V 1.2mA IC DIP-8
The TOP223P is part of the TOP Switch-II family of integrated power conversion ICs, designed to simplify the design of switch-mode power supplies (SMPS). It combines a high-voltage power MOSFET, PWM control, oscillator, and protection circuitry into a single device, reducing the need for external components and improving overall efficiency. This high level of integration allows designers to build compact and reliable offline power supplies with minimal design complexity.
The device operates as a self-biased current-to-duty-cycle converter with an open-drain output, using CMOS technology to reduce power consumption and improve performance. It includes internal features such as auto-restart, thermal shutdown, and current limiting to ensure safe operation under fault conditions. The TOP223P is widely used in flyback converters and similar topologies for consumer electronics, offering stable operation across a wide input voltage range.
Features:
- Integrated high-voltage power MOSFET.
- Built-in PWM controller.
- Self-biased operation.
- Internal auto-restart protection.
- Thermal shutdown protection.
- Cycle-by-cycle current limiting.
- Reduced external component count.
- High efficiency using CMOS technology.
- Supports multiple SMPS topologies.
- Internal error amplifier and shunt regulator.
Specifications:
| Parameter | Value |
|---|---|
| IC Type | Offline PWM Switch |
| Series | TOP Switch-II |
| Package | DIP-8 |
| Input Voltage Range | 85V – 265V AC |
| Output Power Range | Up to ~25W (DIP-8 variant) |
| Breakdown Voltage | ~700V |
| Switching Frequency | ~100 kHz |
| Control Pin Voltage | ~4.7V – 5.7V |
| Thermal Shutdown Temp | ~125°C – 135°C |
| Mounting Type | Through-hole |
Pinout:
| Pin Number | Name | Description |
|---|---|---|
| 1 | SOURCE | Ground / return |
| 2 | SOURCE | Ground / return |
| 3 | SOURCE | Ground / return |
| 4 | CONTROL | feedback and control input |
| 5 | DRAIN | MOSFET drain |
| 6 | SOURCE (HV RTN) | High-voltage return |
| 7 | SOURCE (HV RTN) | High-voltage return |
| 8 | SOURCE (HV RTN) | High-voltage return |
Applications:
- AC-DC power supplies.
- Flyback converters.
- Battery chargers.
- TV and monitor power supplies.
- Adapters.
- Audio and consumer electronics power systems.
Packages:
- 1x TOP223P Offline PWM Switching Power Supply 5.7V 1.2mA IC DIP-8.
