TOP242PN

The TOP242PN is a TOPSwitch-GX Integrated Off-line Switcher IC flyback supply provides 4 outputs, delivering 7W from a 230VAC ±15% input. Resistor R7 programs the internal TOP242PN current limit to 78% of nominal, just above the level needed for full load at low line. This feature allows a more continuous transformer design for better efficiency and cross-regulation, without requiring a larger core size. Resistor R12, C10 and L2 filter conducted EMI; R12 is a flameproof fusible type, also functioning as a fuse. For lower cost, if the supply does not have to meet conducted EMI with the output connected to earth ground, the common mode choke can be replaced with a π filter. A Zener clamp (D11 and VR1) was selected over an RCD clamp to minimize zero load consumption.

• <lt/>0.5W Input power at zero load
• Low component count design occupies 80 x 30 x 16mm
• Integrated soft-start reduces start-up component stresses
• Extended power range for higher power applications
• Eliminate or reduce cost of external components
• Externally programmable accurate current limit
• No turn off glitches line under-voltage (UV) detection
• Line over voltage (OV) shutdown extends line surge limit
• 132kHz Frequency reduces transformer/power supply size
• Hysteretic thermal shutdown for automatic fault recovery
• Large thermal hysteresis prevents PC board overheating

Applications

Power Management, Consumer Electronics

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.