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  • TNY278PN IC - Power Integrations Off Line Switcher IC

The TNY278PN incorporates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design fl exible solution with a low system cost and extended power capability.


 Simple ON/OFF control, no loop compensation needed

 Selectable current limit through BP/M capacitor value

 Higher current limit extends peak power or, in open  frame applications, maximum continuous power Lower current limit improves efficiency in enclosed     adapters/chargers

 Allows optimum TNY278PN choice by swapping devices with no other circuit redesign Tight I2f parameter tolerance reduces system cost

 Maximizes MOSFET and magnetic power delivery 

 Minimizes max overload power, reducing cost of transformer, primary clamp & secondary components ON-time extension – extends low line regulation range/hold-up time to reduce input bulk capacitance

 Self-biased: no bias winding or bias components

 Frequency jittering reduces EMI filter costs

 Pin-out simplifies heat sinking to the PCB SOURCE pins are electrically quiet for low EMI


Symbol Parameter Min Type Max Units
VBP BYPASS Pin Voltage 5.6 5.85 6.15 V
VBPH BYPASS Pin Voltage Hysteresis 0.80 0.95 1.2 V
VSHUNT BP/M Pin Shunt Voltage 6 6.4 6.7 V
ICH1 BP/M Pin Charge Current -8.3 -5.4 -2.5 m A

Related Document:-

TNY278PN IC Data Sheet

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TNY278PN IC - Power Integrations Off Line Switcher IC

  • Product Code: EC-2561
  • Reward Points: 0.75
  • Availability: 1410
  • Rs.75.00
  • (Excluding 18% GST)
  • Price in reward points: 75