Overview
The TNY276PNAU, part of the TinySwitch-III family from Power Integrations, is an energy-efficient offline switch IC that integrates a high-voltage power MOSFET, oscillator, high voltage switched current source, and various control and protection circuits into a single device. This IC is designed to provide a simple ON/OFF control scheme, making it an ideal solution for low-cost, high-efficiency power supplies. The TNY276PNAU is particularly suited for applications requiring isolated output and high reliability, such as chargers, adapters, and auxiliary power supplies in consumer and industrial devices.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage - Breakdown | 700 V |
| Topology | Flyback |
| Frequency - Switching | 132 kHz |
| Duty Cycle | 65% |
| Internal Switch(es) | Yes |
| Output Isolation | Isolated |
| Package/Case | 8-DIP (0.300" / 7.62 mm), 7 leads |
| Operating Temperature (TJ) | -40°C to 150°C |
| Fault Protection | Current limiting, open loop, over temperature, over voltage, short circuit |
| Control Features | Enable/Undervoltage (EN/UV) pin, BYPASS/MULTI-FUNCTION (BP/M) pin |
Key Features
- Combines a 700 V power MOSFET, oscillator, high voltage switched current source, and thermal shutdown circuitry in one device.
- Simple ON/OFF control scheme for output voltage regulation.
- User-selectable current limit via the BYPASS/MULTI-FUNCTION (BP/M) pin.
- Line undervoltage sense and auto-restart capabilities.
- Adaptive switching cycle on-time extension and frequency jitter for improved EMI performance.
- Over-temperature protection and current limit circuitry.
- Leading edge blanking for reduced noise.
Applications
- Chargers and adapters for cell phones, cordless phones, PDAs, digital cameras, MP3/portable audio devices, and shavers.
- PC standby and other auxiliary power supplies.
- DVD/PVR and other low-power set-top decoders.
- Supplies for appliances and industrial systems.
- Metering and other low-power applications.
Q & A
- What is the TNY276PNAU? The TNY276PNAU is an energy-efficient offline switch IC from Power Integrations, part of the TinySwitch-III family.
- What is the breakdown voltage of the TNY276PNAU? The breakdown voltage is 700 V.
- What is the switching frequency of the TNY276PNAU? The switching frequency is 132 kHz.
- What type of topology does the TNY276PNAU use? The TNY276PNAU uses a flyback topology.
- What are the key protection features of the TNY276PNAU? The IC includes current limiting, open loop, over temperature, over voltage, and short circuit protection.
- How does the TNY276PNAU regulate output voltage? The TNY276PNAU uses a simple ON/OFF control scheme for output voltage regulation.
- What is the purpose of the BYPASS/MULTI-FUNCTION (BP/M) pin? The BP/M pin allows for user-selectable current limit and decoupling of the internal power supply.
- What are some common applications of the TNY276PNAU? Common applications include chargers, adapters, PC standby supplies, DVD/PVR decoders, and industrial systems.
- How does the TNY276PNAU improve EMI performance? The IC uses adaptive switching cycle on-time extension and frequency jitter to improve EMI performance.
- What is the operating temperature range of the TNY276PNAU? The operating temperature range is -40°C to 150°C (TJ).
