Overview
The TNY280PN, part of Power Integrations’ TinySwitch-III series, is an energy-efficient AC-to-DC converter IC designed for low-power switch-mode power supplies (SMPS). This IC integrates a high-voltage power MOSFET, oscillator, high-voltage switched current source, current limit, and thermal shutdown into a single package. It offers a compact and efficient solution for various power conversion needs, making it suitable for applications such as chargers, adapters, and standby power supplies.
Key Specifications
| Parameter | Description |
|---|---|
| Integrated MOSFET Voltage | 700 V |
| Maximum Current Limit | 850 mA (typical) |
| Package Options | PDIP-8C, SMD-8C |
| No-Load Power Consumption | < 150 mW at 265 VAC without bias winding, < 50 mW with bias winding |
| Efficiency | High efficiency (>80%) |
| Frequency Jittering | Reduces electromagnetic interference (EMI) |
| Thermal Shutdown | Hysteretic thermal shutdown |
| Enable/Undervoltage Pin | Dual function: enable input and line undervoltage sense |
| BYPASS/MULTI-FUNCTION Pin | For external bypass capacitor and current limit adjustment |
Key Features
- Multi-mode operation for energy efficiency across various load levels
- Auto-restart feature for protection against fault conditions
- Frequency jittering to reduce electromagnetic interference (EMI)
- User-selectable current limit and hysteretic thermal shutdown for enhanced safety and reliability
- High bandwidth for fast turn-on with no overshoot and excellent transient load response
- Extended creepage between DRAIN and all other pins for improved field reliability
- Low component count for reliability and single-sided printed circuit board layout
- ON/OFF control for constant efficiency down to very light loads
Applications
- Chargers and adapters
- Standby power supplies
- Low-power switch-mode power supplies (SMPS)
- Universal input power supplies
- Flyback power supplies
Q & A
- What is the TNY280PN used for?
The TNY280PN is used for low-power switch-mode power supplies (SMPS), particularly in applications such as chargers, adapters, and standby power supplies.
- What are the key components integrated into the TNY280PN?
The TNY280PN integrates a high-voltage power MOSFET, oscillator, high-voltage switched current source, current limit, and thermal shutdown into a single package.
- What is the maximum voltage rating of the integrated MOSFET in the TNY280PN?
The integrated MOSFET has a maximum voltage rating of 700 V.
- How does the TNY280PN reduce electromagnetic interference (EMI)?
The TNY280PN reduces EMI through frequency jittering and the use of E-Shield™ shielding techniques in the transformer.
- What is the purpose of the BYPASS/MULTI-FUNCTION pin in the TNY280PN?
The BYPASS/MULTI-FUNCTION pin is used for an external bypass capacitor, current limit adjustment, and shutdown function.
- What are the package options available for the TNY280PN?
The TNY280PN is available in PDIP-8C and SMD-8C packages.
- How efficient is the TNY280PN in terms of power consumption?
The TNY280PN has high efficiency (>80%) and very low no-load power consumption (< 150 mW at 265 VAC without bias winding, < 50 mW with bias winding).
- What safety features does the TNY280PN include?
The TNY280PN includes user-selectable current limit, hysteretic thermal shutdown, and auto-restart feature for protection against fault conditions.
- Can the TNY280PN be used in universal input power supplies?
Yes, the TNY280PN can be used in universal input power supplies, such as flyback power supplies designed for 12 V, 1 A output from universal input.
- How does the TNY280PN ensure constant efficiency across different load levels?
The TNY280PN ensures constant efficiency through its multi-mode operation and ON/OFF control, which maintains efficiency even at very light loads.
