TNY284-290 is a high-efficiency off-line switching power management chip with a line compensation overload power supply in the SOP7 package.
Product highlights:
1) Lowest system cost with enhanced flexibility
• 725 V rated MOSFETs
• Increased BV derating margin
• Line Compensated Overload Power – No Additional Components Required
• Significantly lower maximum overload change over universal input voltage range
• ±5% Turn-On UV Threshold: Sense Line Voltage Using Single External Resistor
• Simple on/off control without loop compensation
• Current Limit Selectable by BP/M Capacitor Value
• Higher current limit extends peak power, or in open frame applications, maximum continuous power
• Lower Current Limit Improves Enclosed Adapter/Charger Efficiency
• Optimal TinySwitch™-4 selection by switching devices without additional circuit redesign
• Tight I2f parameter tolerance reduces system cost
• Maximizes the utilization of MOSFETs and magnetics
• Extended on-time – extends low-line regulation range/hold-up time to reduce input bulk capacitance
• Self-Biasing: No Bias Winding or Biasing Components
• Frequency dithering reduces EMI filter cost
• Pin layout simplifies PCB thermal dissipation
• SOURCE pin is electrically quiet for low EMI
2) Enhanced Security and Reliability Features
• Accurate hysteretic thermal shutdown protection with auto-recovery requires no manual reset
• Auto-restart provides <3% of maximum power under short-circuit and open-loop fault conditions
• Optional Zener diode output overvoltage shutdown
• Fast AC reset with optional UV external resistor
• Low component count improves reliability and supports single-sided PCB layout
• High bandwidth provides fast turn-on without overshoot and excellent transient load response
• Extended creepage between DRAIN and all other pins improves field reliability
3) EcoSmart™ - extremely energy efficient
• Easily meets all global energy efficiency regulations
• <30 mW no load with bias winding, <150 mW at 265 VAC without bias winding
• ON/OFF control provides constant efficiency down to very light loads
– Ideal for mandatory CEC regulations and EuP standby requirements