Switcher

TNY178PN Datasheet PDF – TinySwitch-LT Offline Switcher IC

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TNY178PN is a TinySwitch-LT offline switcher IC that integrates a high-voltage power MOSFET and power supply controller into a single DIP package for compact AC-DC conversion designs.

Function: Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range

Package: DIP-8C Type

Manufacturer: Power Integrations ( http://www.powerint.com )

Image

TNY178PN Offline Switcher

Description

TNY178PN features simple ON/OFF control without the need for loop compensation, a 650V rated MOSFET, selectable current limit via the BP/M pin, and built-in protection functions including auto-restart and thermal shutdown. This device is widely used in low-power switch-mode power supplies for appliances, standby converters, and auxiliary power applications.

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

TNY178PN output power table

Features

1. High DC current gain due to Darlington connection

2.  High surge resistance due to on-chip protection elements:

(1) C to E: Dumper diode

(2) C to B: Zener diode

3.  Low collector saturation voltage

4. Integrated 650V power MOSFET

5. Frequency jittering for reduced EM

6. Built-in 5.85V regulator for internal biasing

7. Simple ON/OFF control architecture without external loop compensation

Pinout

TNY178PN datasheet pdf pinout

 

Applications

1. Appliance power supplies

2. Home automation auxiliary converters

3. PC standby power supplies

4. Low-power AC-DC adapters and chargers

 

TNY178PN Datasheet PDF

TNY266PN Datasheet – Off-line Switcher ( PDF )

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Part Number: TNY266PN

Function: Low Power Off-line Switcher

Package: PDIP-8B Type

Manufacturer: Power Integrations

Images

TNY266PN Off-line Switcher

Description

TinySwitch-II integrates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit and thermal shutdown circuitry onto a monolithic device. The start-up and operating power are derived directly from the voltage on the DRAIN pin, eliminating the need for a bias winding and associated circuitry. In addition, the TinySwitch-II devices incorporate auto-restart, line undervoltage sense, and frequency jittering. An innovative design minimizes audio frequency components in the simple ON/OFF control scheme to practically eliminate audible noise with standard taped/varnished transformer construction.

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Pinout

TNY266PN datasheet pinout

Features

TinySwitch-II Features Reduce System Cost

1. Fully integrated auto-restart for short circuit and open loop fault protection – saves external component costs

2. Built-in circuitry practically eliminates audible noise with ordinary dip-varnished transformer

3. Programmable line undervoltage detect feature prevents power on/off glitches – saves external components

4. Frequency jittering dramatically reduces EMI (~10 dB) – minimizes EMI filter component costs

5. 132 kHz operation reduces transformer size – allows use of EF12.6 or EE13 cores for low cost and small size

6. Very tight tolerances and negligible temperature variation on key parameters eases design and lowers cost

7. Lowest component count switcher solution

8. Expanded scalable device family for low system cost

 

Orderin Information

TNY266PN Ordering Information

 

TNY266PN Datasheet

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