Keming Electronics Development Co., Ltd

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TNY278PN New Original

USD 0.455-0.455 / piece
Minimum Order:
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Quick Details
  • Part Number:
  • TNY278PN
  • Package:
  • DIP-8
  • Manufacturer:
  • D/C:
  • 1604+
  • Place of Origin:
Packing & Delivery
  • Packing Details:
  • tube packing
  • Delivery Time:
  • 24hour
  • Supply Ability:
Payment & Shipping

  • Others Shipping:
Product Description

Product Attributes


ManufacturerPower Integrations
Packaging Tube 
Part StatusActive
Output IsolationIsolated
Internal Switch(s)Yes
Voltage - Breakdown700V
Voltage - Supply (Vcc/Vdd)-
Duty Cycle65%
Frequency - Switching132kHz
Power (Watts)28W
Fault ProtectionCurrent Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
Control FeaturesEN
Operating Temperature-40°C ~ 150°C (TJ)
Package / Case8-DIP (0.300", 7.62mm), 7 Leads
Supplier Device PackageDIP-8C
Mounting TypeThrough Hole

Product Highlights

Lowest System Cost with Enhanced Flexibility

  • 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 effi ciency in enclosed adapters/chargers

  • Allows optimum TinySwitch-III choice by swapping devices with no other circuit redesign 

  • Tight I2f parameter tolerance reduces system cost

  • Maximizes MOSFET and magnetics 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 fi lter costs

  • Pin-out simplifi es heatsinking to the PCB

  • SOURCE pins are electrically quiet for low EMI

Enhanced Safety and Reliability Features

  • Accurate hysteretic thermal shutdown protection with automatic recovery eliminates need for manual reset

  • Improved auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions

  • Output overvoltage shutdown with optional Zener

  • Line undervoltage detect threshold set using a single optional resistor

  • Very low component count enhances reliability and enables single-sided printed circuit board layout

  • High bandwidth provides fast turn on with no overshoot and excellent transient load response

  • Extended creepage between DRAIN and all other pins improves field reliability



  • Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc.

  • PC Standby and other auxiliary supplies

  • DVD/PVR and other low power set top decoders

  • Supplies for appliances, industrial systems, metering, etc. 


TinySwitch-III 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.

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