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Integrated Off-Line Switcher with EcoSmart Technology for Highly Efficient Power Supplies


Product Details


TOPSwitch-JX cost effectively incorporates a 725 V power MOSFET, high voltage switched current source, multi-mode PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.

Product Highlights

EcoSmart- Energy Efficient

  • Energy efficient over entire load range
  • No-load consumption below 70 mW at 230 VAC achievable
  • Up to 750 mW standby output power for 1 W input at 230 VAC

High Design Flexibility for Low System Cost

  • Multi-mode PWM control maximizes efficiency at all loads
  • 132 kHz operation reduces transformer and power supply size
    • 66 kHz option for highest efficiency requirements
  • Accurate programmable current limit
  • Optimized line feed-forward for line ripple rejection
  • Frequency jittering reduces EMI filter cost
  • Fully integrated soft-start for minimum startup stress
  • 725 V rated MOSFET
    • Simplifies meeting design derating requirements

Extensive Protection Features

  • Auto-restart limits power delivery to <3% during overload faults
    • Output short-circuit protection (SCP)
    • Output overcurrent protection (OCP)
    • Output overload protection (OPP)
  • Output overvoltage protection (OVP)
    • User programmable for hysteretic/latching shutdown
    • Simple fast AC reset
    • Primary or secondary sensed
  • Line undervoltage (UV) detection prevents turn-off glitches
  • Line overvoltage (OV) shutdown extends line surge withstand
  • Accurate thermal shutdown with large hysteresis (OTP)

Advanced Package Options

  • eDIP-12 package:
    • Low profile horizontal orientation for ultra-slim designs
    • Heat transfer to both PCB and heat sink
    • Optional external heat sink provides thermal impedance equivalent to a TO-220
  • eSIP-7C package:
    • Vertical orientation for minimum PCB footprint
    • Simple heat sink mounting using clip provides thermal impedance equivalent to a TO-220
  • eSOP-12 package:
    • 66 W universal input output power capability
    • Low profile surface mounted for ultra-slim designs
    • Heat transfer to PCB via exposed pad and SOURCE pins
    • Supports wave or reflow soldering


Output Power (Max) - Open Frame, 230V 244.00 W
Output Power (Max) - Enclosed, 230V 177.00 W
Output Power (Max) - Enclosed, Univ 118.00 W
Output Power (Max) - Open Frame, Univ 177.00 W
Switching Frequency (max) 132 kHz
Breakdown Voltage 725 V
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold 5.8
IC Package eSIP-7C
Internal Switch Yes
Mounting Type Through Hole
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Control Scheme Secondary-side
Control Features
Selectable Current Limit
Frequency Jittering
Soft Start
Auto-Restart/Latching Fault Response
On/Off Control
Protection Features
Output Undervoltage
Output Overvoltage
Output Short Circuit
Output Open Loop
Output Overload
Remote Shutdown
Topology Flyback
Product Sub-Type PMIC
Secondary Response Auto-restart