Key facts
- Brand
- STMicroelectronics
- Model
- L6566B
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-10
Start here
STMicroelectronics L6566B Multi-mode Controller for SMPS User Manual
The L6566B is a versatile current‑mode primary controller designed for high‑performance offline flyback converters and single‑stage PFC applications. It supports both fixed‑frequency and quasi‑resonant operation, offers an on‑board 700 V high‑voltage start‑up generator, low quiescent current, adaptive UVLO, and a range of protection functions.
The manual includes a description of the device, pin settings and functions, electrical ratings and characteristics, application information with example schematics, mechanical package data, ordering codes, and revision history. It is intended for designers and engineers who need detailed implementation guidance for the L6566B controller.
STMicroelectronics L6566B specifications
| High‑voltage start‑up | 700 V |
|---|---|
| Quiescent current | < 3 mA |
| Adaptive UVLO | Enabled |
| Over‑current protection (OCP) | Pulse‑by‑pulse, shutdown on overload |
| Over‑voltage protection (OVP) | Latched or auto‑restart |
| Gate driver current | 600/ +800 mA |
| Package | SO16N |
| Maximum duty cycle (FF mode) | 70 % |
Source: STMicroelectronics L6566B Multi-mode Controller for SMPS Datasheet
All STMicroelectronics L6566B documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What operating modes does the L6566B support?
It supports both fixed‑frequency (FF) and quasi‑resonant (QR) operation.
From: STMicroelectronics L6566B Multi-mode Controller for SMPS Datasheet
What is the quiescent current of the L6566B?
The quiescent current is less than 3 mA.
From: STMicroelectronics L6566B Multi-mode Controller for SMPS Datasheet
What voltage can the high‑voltage start‑up pin tolerate?
The start‑up pin can withstand up to 700 V.
From: STMicroelectronics L6566B Multi-mode Controller for SMPS User Manual
What is the quiescent current of the L6566B?
The device draws less than 3 mA in quiescent mode.
From: STMicroelectronics L6566B Multi-mode Controller for SMPS User Manual