TOP250YN Integrated Off-Line Switcher IC TO-220-7C
TOP250YN is a TOPSwitch-GX family integrated off-line switcher IC designed to simplify compact AC-DC power supply design. It combines the high-voltage power MOSFET, PWM control, protection functions, and other control circuitry in a single CMOS-based device, helping reduce part count and overall system cost.
The device is intended for flexible flyback power supply designs and supports extra feature pins for functions such as line sensing, accurate current limit setting, remote on/off control, synchronization, and frequency selection. The datasheet emphasizes improved efficiency, reduced EMI, and easier design implementation across a wide range of power levels.
For the TOP250YN version, the Y package means TO-220-7C and the N suffix indicates pure matte tin lead finish. This makes the part suitable for designers who need a practical through-hole solution with strong thermal and electrical integration in offline switcher applications.
Features:
- Integrated high-voltage power MOSFET, PWM control, and protection circuitry in one IC.
- Fully integrated soft-start for reduced stress and overshoot.
- Externally programmable accurate current limit.
- Frequency jittering for lower EMI and reduced filtering cost.
- Regulates to zero load without dummy loading.
- 132 kHz switching frequency with automatic reduction at light load.
- Line under-voltage and overvoltage protection.
- Hysteretic thermal shutdown for automatic fault recovery.
- TO-220-7C package option with extra feature pins.
Specifications:
| Specification | TOP250YN Value |
|---|---|
| Product family: | TOPSwitch-GX |
| Part number: | TOP250YN |
| Package identifier: | Y |
| Package type: | Plastic TO-220-7C |
| Lead finish: | N = Pure Matte Tin (Pb-Free) |
| DRAIN voltage: | -0.3 V to 700 V |
| DRAIN peak current: | 10.08 A |
| Switching frequency: | 132 kHz typical |
| Low-frequency option: | 66 kHz option |
| Thermal impedance (Y package): | 80 °C/W |
| Output power (230VAC adapter): | 45 W |
| Output power (230VAC open frame): | 135 W |
| Output power (85–265VAC adapter): | 32 W |
| Output power (85–265VAC open frame): | 90 W |
Pinout:
- DRAIN (D) Pin
- FREQUENCY (F) Pin
- SOURCE (S) Pin
- EXTERNAL CURRENT LIMIT (X) Pin
- LINE-SENSE (L) Pin
- CONTROL (C) Pin
Applications:
- High-efficiency 30 W universal input power supply.
- High-efficiency enclosed 70 W universal adapter power supply.
- High-efficiency 250 W, 250-380 VDC input power supply.
- Multiple-output 60 W, 185-265 VAC input power supply.
- Processor-controlled supply turn on/off.
Package Contents:
- 1x TOP250YN Integrated Off-Line Switcher IC TO-220-7C
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