微雪电子

POWER开关器件 TNY268

TNY268

芯片信息

型号 封装 在线定购
TNY268PN（查看） DIP

引脚布局

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技术资料—— TNY268 PDF技术资料

TNY268 概述


　　The TNY268 integrates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit and thermal shutdown circuitry onto a monolithic device. The start-up and operating power are derived directly from the voltage on the DRAIN pin, eliminating the need for a bias winding and associated circuitry.
　　In addition, the TNY268 devices incorporate auto-restart, line undervoltage sense, and frequency jittering. An innovative design minimizes audio frequency components in the simple ON/OFF control scheme to practically eliminate audible noise with standard taped/varnished transformer construction. The fully integrated auto-restart circuit safely limits output power during fault conditions such as output short circuit or open loop, reducing component count and secondary feedback circuitry cost. An optional line sense resistor externally programs a line under-voltage threshold, which eliminates power down glitches caused by the slow discharge of input storage capacitors present in applications such as standby supplies. The operating frequency of 132 kHz is jittered to significantly reduce both the quasi-peak and average EMI, minimizing filtering cost.
TNY268 参数
TNY268 基本参数
输出电压   5.8V
频率范围   124～140kHz
工作温度   -40℃～150℃
隔离输出   √
TNY268输出功率
230 VAC ±15%   适配器 16W
  开放式 23W
85-265 VAC   适配器 10W
  开放式 15W
TNY268 封装类型
P(DIP-8B)
G(SMD-8B)

TNY268 特性

    Reduce System Cost
  • Fully integrated auto-restart for short circuit and open loop fault protection — saves external component costs
  • Built-in circuitry practically eliminates audible noise with ordinary dip-varnished transformer
  • Programmable line under-voltage detect feature prevents power on/off glitches — saves external components
  • Frequency jittering dramatically reduces EMI (～10 dB)
    — minimizes EMI filter component costs
  • 132 kHz operation reduces transformer size — allows use of EF12.6 or EE13 cores for low cost and small size
  • Very tight tolerances and negligible temperature variation on key parameters eases design and lowers cost
  • Lowest component count switcher solution
  • Expanded scalable device family for low system cost

    • Better Cost/Performance over RCC & Linears
  • Lower system cost than RCC, discrete PWM and other integrated/hybrid solutions
  • Cost effective replacement for bulky regulated linears
  • Simple ON/OFF control — no loop compensation needed
  • No bias winding — simpler, lower cost transformer
  • Simple design practically eliminates rework in manufacturing

    • High Performance at Low Cost
  • High voltage powered — ideal for charger applications
  • High bandwidth provides fast turn on with no overshoot
  • Current limit operation rejects line frequency ripple
  • Built-in current limit and thermal protection improves safety