TOP256YN Off-Line Switching Power Converter IC TO-220-7C
TOP256YN Off-Line Switching Power Converter IC TO-220-7C is a high-performance offline switching power converter from the TOPSwitch-HX family by Power Integrations. It integrates a high-voltage power MOSFET, PWM controller, startup circuitry, and comprehensive protection features into a single device, simplifying the design of compact and efficient switch-mode power supplies. The IC provides programmable current limiting, line voltage sensing, soft-start, thermal shutdown, and frequency jittering for reduced EMI, making it suitable for consumer, industrial, and embedded AC-DC power conversion applications.
Features
- Integrated 700V high-voltage power MOSFET.
- Built-in PWM controller with startup circuitry.
- Programmable current limit for design flexibility.
- Line voltage sensing for enhanced protection.
- Integrated soft-start reduces startup stress.
- Automatic thermal shutdown protection.
- Frequency jittering helps reduce EMI emissions.
- Low standby power consumption.
- Requires minimal external components.
- TO-220-7C through-hole package for high-power applications.
Specifications
| Parameter | Details |
| Product Type | Off-Line Switching Power Converter IC |
| Product Family | TOP Switch-HX |
| Part Number | TOP256YN |
| Package | Y Package, Plastic TO-220-7C |
| Mounting Type | Through Hole |
| Integrated Switch | 700V Power MOSFET |
| Breakdown Voltage | 700V |
| Drain Supply Voltage | 18V |
| Control Supply Current | 1.6mA |
| Switching Frequency | 132kHz |
| Low-Frequency Option | 66kHz |
| Maximum Duty Cycle | 78% |
| Self-Protection Current Limit | 2.371A(Min), 2.55A(Typ), 2.729A(Max) |
| ON-State Resistance (25°C) | 2.14Ω |
| ON-State Resistance (100°C) | 3.50Ω |
| Leading-Edge Blanking Time | 220ns |
| Auto-Restart Upper Threshold | 5.8V |
| Auto-Restart Lower Threshold | 4.8V |
| Soft-Start Time | 10ms |
| PWM Gain | -23%/mA |
| Thermal Shutdown Temperature | 135°C(Min), 142°C(Typ), 150°C(Max) |
| Thermal Shutdown Hysteresis | 75°C |
| Thermal Impedance (Y Package) | 80°C/W |
| Output Power (230VAC Adapter) | 60W |
| Output Power (230VAC Open Frame) | 119W |
| Output Power (85VAC–265VAC Adapter) | 40W |
| Output Power (85VAC–265VAC Open Frame) | 86W |
| No-Load Power Consumption | Less Than 200mW At 230VAC |
| Operating Junction Temperature | -40°Cto+150°C |
| Storage Temperature | -65°Cto+150°C |
Dimensions
Pinout
| Pin Number | Pin Name | Function / Description |
|---|---|---|
| 1 | V (Voltage Monitor) | Line voltage monitoring pin used for line under-voltage and over-voltage protection. |
| 2 | X (External Current Limit) | External current-limit programming pin used to adjust the MOSFET current limit. |
| 3 | C (Control) | Feedback and control input. Connects to the control bypass capacitor and regulates the output. |
| 4 | S (Source) | Source terminal of the internal power MOSFET and primary-side ground reference. |
| 5 | F (Frequency) | Frequency selection pin used to choose or synchronize the switching frequency. |
| 6 | NC | No internal connection. |
| 7 | D (Drain) | Drain terminal of the internal high-voltage power MOSFET. Connected to the primary side of the transformer. |
Applications
- AC-DC switch-mode power supplies.
- Industrial power supplies.
- Power adapters.
- Battery chargers.
- Consumer electronic equipment.
- Home appliance power supplies.
- LED driver power supplies.
- Networking equipment.
- Embedded auxiliary power supplies.
- Industrial automation systems.
Package Contents
- 1 x TOP256YN Off-Line Switching Power Converter IC TO-220-7C