Power Integrations TNY284-290 TinySwitch-4 Off-Line Switchers

Power Integrations TNY284-TNY290 TinySwitch™-4 Off-Line Switchers feature the lowest system cost with enhanced flexibility and enhanced safety and reliability features. The devices are also EcoSmart™ energy efficient, allowing them to easily meet all global energy efficiency regulations. These Power Integrations off-line switchers feature line-compensated overload power protection, allowing TinySwitch-4 devices to dramatically reduce the maximum overload variation over the universal input voltage range.

TinySwitch-4 TNY284-TNY290 devices are particularly helpful in applications such as PC standby and CV adapters to limit the maximum output power during the overload fault condition. TinySwitch-4 also incorporates a 725V MOSFET that easily allows 80% de-rating for high reflected voltage and high bus voltage designs.

The BP/M pin permits the MOSFET current limit to be adjusted up or down, allowing designers to optimize power delivery and efficiency in a variety of physical implementations. An on-time extension function extends the low-line regulation range, enabling hold-up time to be met with lower values of input capacitance.

Features

725V rated MOSFET: Increases BV de-rating margin
Line compensated overload power – no additional components
- Dramatically reduces max overload variation over universal input voltage range
±5% turn on UV threshold: line voltage sense with single external resistor
Simple ON/OFF control, no loop compensation needed
Selectable current limit through BP/M capacitor value
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
- Fast AC reset with optional UV external resistor
Easily meets all global energy efficiency regulations
No-load less than 30mW with bias winding, less than 150mW at 265V_AC without bias winding
ON/OFF control provides constant efficiency down to very light loads – ideal for mandatory CEC regulations and EuP standby requirements