The document introduces an alternative solution for low-power charger and adapter designs, with lower cost, better performance, and higher efficiency. The product features a low-cost alternative to linear/RCC power supplies, extremely simple circuit structure, reduced weight, cost savings, automatic restart protection, 42 kHz operating frequency, universal input range, system-level protection, and high energy efficiency.
This manual describes the LNK500 constant‑voltage/constant‑current controller, covering its functional description, pin assignments, and internal current‑limit circuitry. It explains both CV (constant‑voltage) and CC (constant‑current) operation modes, auto‑restart behavior, and typical performance characteristics.
Key specifications such as input voltage range, output power, switching frequency, and efficiency are listed, along with design notes, typical application circuits, and safety warnings. The document also includes a notes section and contact information for Power Integrations support.
| Input voltage range | 85‑265 VAC |
|---|---|
| Typical output power | 2.75 W |
| No‑load power consumption | ≈300 mW at 230 VAC |
| Switching frequency | 42 kHz |
| Maximum efficiency | up to 70 % |
The device operates from 85 VAC up to 265 VAC.
Typical output power is 2.75 W.
The controller switches at about 42 kHz.
No‑load power consumption is roughly 300 mW at 230 VAC.