TNY174DG sop-7

Микросхема TNY174DG (TNY174)

TNY174DG - Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range, SOP-7

 

Lowest System Cost with Enhanced Flexibility

• 650 V rating optimized for non-active PFC applications
• 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-LT 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
• Auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions
• Output overvoltage shutdown with optional Zener
• 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 fi eld reliability

 

EcoSmart® – Extremely Energy Efficient

• Easily meets all global energy effi ciency regulations
• No-load <150 mW at 265 VAC without bias winding, <50 mW with bias winding
• ON/OFF control provides constant effi ciency down to very light loads – ideal for mandatory CEC regulations

 

Applications

• Chargers/adapters for cell/cordless phones, PDAs, digital
• cameras, MP3/portable audio, shavers, etc.
• DVD/PVR and other low power set top decoders
• Supplies for appliances, industrial systems, metering, etc.