Description
The TOP268EG is a high-efficiency integrated off-line switching regulator IC designed for use in compact AC–DC power supplies employing flyback topology. It belongs to the TOP Switch-JX family, which integrates a high-voltage power MOSFET with PWM control, oscillator, protection, and control circuitry into a single monolithic device. The topology supports universal mains input and provides efficient power conversion with extensive built-in protection features and minimal external components.
FEATURES
- Input Voltage: 85 VAC – 265 VAC
- Output Power: ~105 W (enclosed), ~148 W (open frame @ 230 VAC)
- MOSFET Breakdown Voltage: 725 V
- Switching Frequency: ~66 kHz / 132 kHz
- Protection Features: SCP, OCP, OVP, UV, UVP, OTP (auto-restart)
- Operating Temp. Range: −40 °C to +150 °C
- Mounting Style: Through Hole
SPECIFICATION
- Dimension: 10.24 × 2.06 × 8.25 mm
- Additional information
- Gross weight: 0.5 g
- Manufacturer part number: TOP268EG





