Description:

TOPSwitch-HX incorporates a 700 V power MOSFET, high voltage switched current source, PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.

Lower System Cost, Higher Design Flexibility

• Multi-mode operation maximizes efficiency at all loads
• New eSIP-7C package, low thermal impedance, space-saving design, clip-mounted heatsink
• No heatsink required up to 35 W (up to 48 W at 230 VAC) using P, G or M packages
• Output overvoltage protection (OVP) is user programmable for latching/non-latching shutdown with fast AC reset
• Line undervoltage (UV) detection prevents turn-off glitches
• Line overvoltage (OV) shutdown extends line surge limit
• Accurate programmable current limit
• Optimized line feed-forward for line ripple rejection
• 132 kHz frequency (254Y-258Y and all E packages) reduces transformer and power supply size (half frequency option for video applications)
• Tight I²f parameter tolerance reduces system cost
• Frequency jittering reduces EMI filter cost
• Heatsink is connected to SOURCE for low EMI
• Improved auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions
• Accurate hysteretic thermal shutdown function automatically recovers without requiring a reset
• Fully integrated soft-start for minimum start-up stress
• Extended creepage between DRAIN and all other pins improves field reliability

EcoSmart^®– Energy Efficient

• Energy efficient over entire load range
• No-load consumption
  • Less than 200 mW at 265 VAC for TOP256-258
  • Less than 300 mW at 265 VAC for TOP259-261
• Standby power for 1 W input
  • >600 mW output at 110 VAC input
  • >500 mW output at 265 VAC input

eSIP (E) Package (eSIP Package Information)

• Low junction-to-case thermal impedance (2 °C per watt)
• Low height is ideal for adapters where space is limited
• Simple clip-mounted heatsink reduces manufacturing cost
• Passes shock and vibration tests to IEC 60068 with clip-mounted heatsink
• Supports adapter applications to 118W (177 W at 230VAC)
• External current limit adjustment and remote ON/OFF
• Voltage monitor pin (OV, UV, line feed forward, OVP, reset)
• Selectable switching frequency (132/66 kHz)

Applications:

• LCD monitors
• Personal computers
• Small servers
• Laptop adapters
• Set-top boxes
• Digital TVs
• Printers
• DVD Players and Recorders
• UPS
• Video Games
• Broadband Modems
• Cellular phone adapters
• Audio Amplifiers

Notes:

1. Packages: P: DIP-8C, G: SMD-8C, M: SDIP-10C, Y: TO-220-7C, E: eSIP-7C.
2. 230 VAC or 110/115 VAC with doubler.
3. Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 °C ambient. Use of an external heat sink will increase power capability.
4. Minimum continuous power in an open frame design at +50 °C ambient.
5. Peak power capability in any design at +50 °C ambient.