Part Number: TNY178PN
Function: Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range
Manufacturer: Power Integrations ( http://www.powerint.com )
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Description
TinySwitch-LTcombines 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, 5.85 V regulator, BYPASS/MULTI-FUNCTION pin undervoltage, overvoltage circuit, and current limit selection circuitry, over- temperature protection, current limit circuit, leading edge blanking, and a 700 V power MOSFET. TinySwitch-LTincorporates additional circuitry for auto-restart, adaptive switching cycle on-time extension, and frequency jitter. Figure 2 shows the functional block diagram with the most important features.
Output Power Table
Features
1. High DC current gain due to Darlington connection
2. High surge resistance due to on-chip protection elements:
C to E: Dumper diode
C to B: Zener diode
3. Low collector saturation voltage
Pinout
