Overview
The LNK306PN, produced by Power Integrations, is a member of the LinkSwitch-TN family of monolithic integrated circuits. This device is designed to replace linear, resistive, and capacitive droppers in non-isolated power supply applications, offering higher efficiency and better performance at an equal system cost. The LNK306PN integrates a 700 V power MOSFET, an oscillator, a basic On/Off control scheme, a high-voltage switched current source, frequency jittering, cycle-by-cycle current limit, and thermal shutdown circuitry. It supports buck, buck-boost, and flyback topologies, making it versatile for various AC/DC conversion tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Current - Output (Max, CCM, 230V) | 360 mA |
| Current - Output (Max, MDCM, 230V) | 225 mA |
| Breakdown Voltage | 700 V |
| IC Package | DIP-8B (Plastic Dual In-line Package) |
| Mounting Type | Through Hole |
| Temperature - Operating (Min) | -40 °C |
| Temperature - Operating (Max) | 150 °C |
| Input Voltage Range | 85 VAC to 265 VAC |
| Switching Frequency | Up to 70 kHz |
Key Features
- Supports buck, buck-boost, and flyback topologies.
- System-level thermal overload, output short-circuit, and open loop protection.
- Excellent line and load regulation even with typical configurations.
- High bandwidth provides fast turn-on with no overshoot.
- Current limit operation rejects line ripple.
- Universal input voltage range (85 VAC to 265 VAC).
- Built-in current limit and hysteretic thermal protection.
- Higher efficiency than passive solutions and higher power factor than capacitor-fed solutions.
- Enables a 100% SMD designed power supply).
- Auto-restart circuit safely restricts output power under fault conditions like short-circuit or open loop).
Applications
- Non-isolated buck or buck-boost converter solutions for linear/passive dropper replacement).
- Major and small home appliances (e.g., coffee machines, rice cookers, dishwashers, microwave ovens)).
- Industrial controls and automation (e.g., robotics, motor control systems, automated equipment)).
- Utility meters).
- Constant current LED lighting and timers).
- Telecommunications equipment requiring compact, efficient power supply solutions).
- Consumer electronics such as LED drivers, smart home devices, and small appliances).
Q & A
- What is the LNK306PN used for?
The LNK306PN is used to replace linear, resistive, and capacitive droppers in non-isolated power supply applications, offering higher efficiency and better performance.
- What topologies does the LNK306PN support?
The LNK306PN supports buck, buck-boost, and flyback topologies.
- What is the input voltage range of the LNK306PN?
The input voltage range of the LNK306PN is from 85 VAC to 265 VAC.
- What are the key protection features of the LNK306PN?
The LNK306PN features system-level thermal overload, output short-circuit, and open loop protection.
- What is the operating temperature range of the LNK306PN?
The operating temperature range of the LNK306PN is from -40 °C to 150 °C.
- Is the LNK306PN RoHS compliant?
Yes, the LNK306PN is RoHS compliant.
- What types of applications can benefit from the LNK306PN?
The LNK306PN is suitable for home appliances, industrial controls, utility meters, LED lighting, and telecommunications equipment among others.
- How does the LNK306PN improve efficiency compared to passive solutions?
The LNK306PN offers higher efficiency than passive solutions and higher power factor than capacitor-fed solutions, along with excellent line and load regulation.
- What is the significance of the auto-restart feature in the LNK306PN?
The auto-restart feature safely restricts output power under fault conditions like short-circuit or open loop, reducing system-level load protection costs and component count.
- Can the LNK306PN be used in SMD designs?
Yes, the LNK306PN enables a 100% SMD designed power supply.
