LNK6775K-TL

LNK6775K-TL is an off-line switch-mode power supply IC from Power Integrations’ LNK family. It combines a high-voltage MOSFET (typ. 650–700 V), a PWM/controller, and startup circuitry in an 8-pin package. The TL suffix denotes Tape-and-Reel packaging. It’s intended for low‑power flyback converters used in wall adapters, phone chargers, and LED drivers (roughly 1–6 W depending on design). It supports primary‑side regulation (PSR), allowing regulation without an opto coupler in many designs, which improves BOM and efficiency. Key features include current‑mode control, burst/eco mode for light loads, undervoltage lockout, thermal and overcurrent protections, and a compact footprint.
How it works: in a flyback topology, the internal MOSFET charges the transformer primary to store energy, then releases it to the secondary to charge the output. PSR uses reflected output voltage for regulation, reducing external feedback hardware. External components are a transformer, input EMI filter, and minimal feedback network (or none if PSR suffices).
For exact specs (input range, output power, switching frequency, protections), consult the datasheet/application notes.

Here are the key features of LNK6775K-TL (Power Integrations LinkSwitch-TN family):
- Integrated 700V high-voltage MOSFET
- Primary-side regulation (PSR) — no optocoupler required
- Off-line flyback controller with high efficiency and low standby power
- Universal input: 85–265 VAC
- Minimal external components; compact, isolated power supply design
- Built-in protection: current limit, thermal shutdown, hiccup/short-circuit protection
- Suitable for compact 5–7 W class isolated supplies (with proper transformer)
- Features valley-switching/efficient switching topology for EMI reduction
- Packaging: Tape-and-reel (-TL), RoHS-compliant
Note: Refer to the datasheet for exact electrical specs and transformer design guidelines.

It uses an 8-pin DIP (DIL-8) style package (through-hole). The “-TL” suffix indicates Tape & Reel packaging.

- Pin count: 8 pins (SO-8/DIP-8 style; -TL indicates Tape & Reel packaging).
- Function: An off-line high-voltage switching regulator (integrated primary-side switch) for flyback power supplies. It includes a high-voltage MOSFET (~700V) plus startup current source, current/overcurrent protection, and thermal shutdown for primary-side regulation.

Manufacturer: Power Integrations.
What kind of company: A semiconductor company that designs and manufactures high-voltage switching ICs for power supplies (off-line flyback controllers, such as the LinkSwitch/TinySwitch families).

Off-line flyback switch-mode power supplies for consumer electronics. Typical applications include wall-wart adapters and USB chargers, small standby/auxiliary supplies for set-top boxes, telecom equipment, and LED lighting drivers—i.e., isolated, low- to mid-power AC-DC supplies powered directly from 85–265 VAC.

There isn’t a public exact 1:1 cross for LNK6775K-TL. It’s a Power Integrations LinkSwitch-TL offline switcher, so substitutions are other TL-family devices with matching specs (input voltage, output power, pinout). For a precise substitute, use Power Integrations’ Cross-Reference tool or consult distributors to find the closest TL-device that meets your requirements.