POWER INTEGRATIONS TNY289PG Datasheet & Stock

TinySwitch-4 combines a high-voltage power MOSFET switch with a power supply controller in one device. Unlike conventional PWM (pulse width modulator) controllers, it uses a simple ON/OFF control to regulate the output voltage. The controller consists of an oscillator, enable circuit (sense and logic), current limit state machine, 5.85V regulator, BYPASS/MULTIFUNCTION pin undervoltage, overvoltage circuit, and current limit selection circuitry, over-temperature protection, current limit circuit, leading edge blanking, and a 725V power MOSFET. TinySwitch-4 incorporates additional circuitry for line undervoltage sense, auto-restart, adaptive switching cycle on-time extension, and frequency jitter. Figure 3 shows the functional block diagram with the most important features.




725V rated MOSFET

Line compensated overload power – no additional components

±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

Tight I2f parameter tolerance reduces system cost

ON-time extension – extends low-line regulation range/hold-up time to reduce input bulk capacitance

Self-biased: no bias winding or bias components

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

Auto-restart delivers





Output overvoltage shutdown with optional Zener





Applications


Computers & Computer Peripherals,

Industrial,

Consumer Electronics





Warnings
Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.