TOP266VG Integrated Off-Line Switcher IC eDIP-12B
The TOP266VG is a TOPSwitch-JX family integrated off-line switcher designed for efficient AC-DC power conversion in compact power supplies. It combines a high-voltage power MOSFET, control circuitry, oscillator, thermal shutdown, and protection functions into a single monolithic device, which helps reduce external parts count and overall system complexity.
It is built for applications that need good efficiency, low standby power, and stable operation across a wide load range. The device supports multi-mode PWM control, soft-start, frequency jitter, and line-sense functions, all of which help improve performance, reduce EMI, and make the design easier to optimize for small adapters and similar supplies.
For the TOP266VG variant in the eDIP-12B package, the datasheet shows it as a practical choice for universal-input flyback power supplies with good thermal handling and compact packaging. It is positioned for designs that need reliable output capability, strong protection behavior, and a balance of efficiency and space-saving construction.
Features:
- Integrated 725 V power MOSFET.
- Multi-mode PWM control for higher efficiency over the full load range.
- 132 kHz default switching frequency, with 66 kHz selectable by pin connection.
- Fully integrated 17 ms soft-start.
- Frequency jitter to reduce EMI peaks.
- Line undervoltage and overvoltage protection.
- Output overvoltage, overload, overcurrent, and short-circuit protection.
- External current limit programmability through the X pin.
- Hysteretic thermal shutdown protection.
- Low-profile eDIP-12B package with heat transfer to PCB and heat sink.
Specifications:
| Specification | TOP266VG Value |
|---|---|
| Family: | TOPSwitch-JX |
| Package: | eDIP-12B (V Package) |
| Maximum Output Power (230 VAC, Adapter): | 24 W |
| Maximum Output Power (85–265 VAC, Open Frame): | 28.5 W |
| Switching Frequency: | 132 kHz, 66 kHz selectable |
| Maximum Duty Cycle: | 78% |
| Soft-Start Time: | 17 ms |
| Drain Peak Current: | 4.08 A |
| Breakdown Voltage: | 725 V |
| On-State Resistance (25°C): | 3.2 Ω |
| On-State Resistance (100°C): | 4.75 Ω (max) |
| Thermal Resistance θJA: | 68 °C/W or 58 °C/W |
| Thermal Resistance θJC: | 2 °C/W |
Pinout:
- DRAIN (D)
- CONTROL (C)
- EXTERNAL CURRENT LIMIT (X)
- VOLTAGE MONITOR (V)
- FREQUENCY (F)
- SOURCE (S)
Applications:
- Notebook or laptop adapter.
- Generic adapter.
- Printer.
- LCD monitor.
- Set-top box.
- PC or LCD TV standby.
- Audio amplifier.
Package Contents
- 1x TOP266VG Integrated Off-Line Switcher IC eDIP-12B