TOP258PN Offline Switcher Power Supply IC PDIP-8C
The TOP258PN is a highly integrated off-line switcher IC designed for use in isolated AC-DC power supplies employing a flyback topology. It integrates a high-voltage 700 V MOSFET, control logic, PWM oscillator, and comprehensive protection circuitry onto a single monolithic die, substantially reducing external component count and simplifying power supply design. The device belongs to Power Integrations’ TOPSwitch-HX family, which is optimized for high-efficiency performance over a wide load range as well as compliance with modern energy-efficiency standards in standby and no-load conditions.
Features:
- Multi-mode operation for optimal efficiency at varying loads.
- 132kHz switching frequency with jittering to minimize EMI filter costs.
- Programmable output overvoltage protection with latching or non-latching options.
- Line undervoltage detection to prevent turn-off glitches.
Specifications:
| Parameter | Value |
|---|---|
| Part Number: | TOP258PN |
| Series: | TOPSwitch®-HX |
| Description: | Off-Line Switcher IC with Integrated 700V MOSFET |
| Package: | PDIP-8C (P Package) |
| Power Capability – Enclosed Adapter: | 48W (230VAC) / 35W (85-265VAC) |
| Power Capability – Open Frame: | 62W (230VAC) / 48W (85-265VAC) |
| Peak Power Capability: | 105W (230VAC) / 75W (85-265VAC) |
| Switching Frequency: | 66kHz (fixed, internal) |
| MOSFET Breakdown Voltage: | 700V (minimum) |
| Duty Cycle Maximum: | 78% |
| Soft-Start Duration: | 17ms |
| Auto-Restart Duty Cycle: | 2% |
| Control Pin Voltage (Vc): | 5.8V |
| Control Pin Capacitance: | 47μF (recommended) |
| Line Undervoltage Threshold: | 100VDC |
| Line Overvoltage Threshold: | 450VDC |
| Current Limit (Minimum): | 1.25A |
| Current Limit: | 1.44A |
| Current Limit (Maximum): | 1.66A |
| Operating Junction Temperature: | -40°C to +150°C |
| Storage Temperature: | -65°C to +150°C |
Footprint:
Applications:
Applications:- Enclosed Adapters up to 35W continuous power (85-265VAC input).
- Open Frame Power Supplies up to 48W continuous power (85-265VAC input).
- Peak Power Applications up to 75W peak power for motor drives, printers, and audio equipment.
- Consumer Electronics DVD players, set-top boxes, game consoles, and home appliances.
- Chargers Battery chargers for power tools, smartphones, and portable devices.
- Industrial Power Supplies Auxiliary power supplies for industrial controls and instrumentation.
- Standby and Auxiliary Power Low-power standby supplies for TVs, monitors, and computers.
- LED Lighting Constant voltage/constant current LED drivers.
- White Goods Power supplies for washing machines, refrigerators, and air conditioners.
- PC Peripherals Power supplies for monitors, printers, and external hard drives.
Package Include:
- 1x TOP258PN Offline Switcher Power Supply IC PDIP-8C