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LNK306PN / LNK306 DIP-7 LinkSwitch Offline Switching Power IC (2pcs)
LNK306PN / LNK306 DIP-7 LinkSwitch Offline Switching Power IC (2pcs)
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LNK306PN / LNK306 — DIP-7 LinkSwitch Offline Switching Power IC
The LNK306PN is a Power Integrations LinkSwitch®-TN series IC that integrates a 700V N-channel MOSFET, PWM controller, and protection circuits in a single DIP-7 package. Designed for non-isolated buck and buck-boost offline power supplies up to 3.5W, it enables ultra-simple designs with minimal external components. This listing provides 2 pieces — new and original.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | LNK306PN / LNK306 |
| Package | DIP-7 (eSIP-7C) |
| Series | LinkSwitch-TN (Power Integrations) |
| Integrated MOSFET | 700V N-channel |
| Output Power | Up to 3.5W (buck/buck-boost) |
| Switching Frequency | 66kHz (jittered for EMI) |
| Current Limit | 360mA (typ.) |
| Startup Current | <100μA |
| Protections | OVP, OTP, auto-restart, hysteretic thermal |
| Operating Temperature | -40°C to +125°C |
| Quantity | 2 PCS |
LNK306 Series Selection
| Part | Output Power | Current Limit | Package |
|---|---|---|---|
| LNK304PN | Up to 1.5W | 170mA | DIP-7 |
| LNK305PN | Up to 2.5W | 255mA | DIP-7 |
| LNK306PN | Up to 3.5W | 360mA | DIP-7 |
| LNK306GN | Up to 3.5W | 360mA | SMD-8 |
Why Choose LNK306PN?
- ✅ Integrated 700V MOSFET — no external power switch needed
- ✅ Minimal external components — just inductor, diode, and capacitors for complete supply
- ✅ Frequency jitter — built-in EMI reduction, simplifies EMC compliance
- ✅ Auto-restart protection — safe recovery from overload and short-circuit
- ✅ Power Integrations quality — proven reliability in millions of consumer products
Compatible With / Works With
- LED driver circuits (constant current, non-isolated)
- Appliance standby power supply (3.3V/5V, <3.5W)
- Smart home device power supply (ESP8266 WiFi module, 3.3V/250mA)
- Schottky diode: 1N4007, UF4007, ES1J (output rectifier)
- Power Integrations PIXls Designer software (free design tool)
Typical Applications
- LED Bulb Driver — non-isolated buck driver for 3–7W LED retrofit bulbs
- Appliance Standby Supply — 5V/500mA for microcontroller in washing machine, AC unit
- Smart Switch Power — 3.3V supply for ESP8266 in 220V smart wall switch
- Charger Adapter — 5V/500mA USB charger with minimal component count
- Sensor Power Supply — isolated or non-isolated 3.3V for industrial sensors
FAQ
Q: Is LNK306PN isolated or non-isolated?
A: LNK306PN is designed for non-isolated buck and buck-boost topologies. For isolated flyback designs, use the TNY series (TNY268, TNY279) or LNK series with transformer.
Q: Can LNK306PN power an ESP8266 directly?
A: Yes. Design a 3.3V/250mA buck converter with LNK306PN (within its 3.5W rating). Use Power Integrations' free PIXls Designer tool to calculate component values for your specific output requirements.
Q: What is the difference between LNK306PN and LNK306GN?
A: Same electrical specifications. LNK306PN is in DIP-7 (through-hole) package; LNK306GN is in SMD-8 package. Choose based on your PCB assembly method.
Package Contents
- 2× LNK306PN / LNK306 DIP-7 LinkSwitch Offline Switching Power IC
