Key facts
- Brand
- STMicroelectronics
- Model
- L6565
- Industry
- Industrial
- Documents
- 8
- Languages
- EN
- Last added
- 2012-08-10
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ST L6565 handbook
The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) fly-back converters. It features quasi-resonant operation, line voltage feedforward, pulse-by-pulse and hiccup-mode overcurrent protection, ultra-low start-up and quiescent current, disable function, and 1% precision internal reference voltage.
Read onlineSTMicroelectronics L6565 specifications
| Output power | 80 W |
|---|---|
| Input voltage | 180 Vac to 600 Vac |
| Output voltage | 24 V |
| Output current | 3.3 A |
| Efficiency | > 80 % |
| Switching frequency | > 50 kHz |
| Safety standard | EN60950 |
| Feedback type | secondary regulation |
All STMicroelectronics L6565 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the input voltage range for this demonstration board?
The board accepts an AC input ranging from 180 Vac to 600 Vac.
How much maximum output power does the SMPS provide?
The demonstration board provides a maximum output power of 80 W.
What is the target standby consumption for this TV power supply?
The design target is a standby power consumption of less than 1 Watt.
What topology is used in this SMPS design?
The design uses a Quasi-resonant Flyback Converter topology.
How does the L6565 controller simplify the interface required for quasi-resonant operation?
The device uses a dedicated ZCD pin to detect the negative-going portion of the drain voltage, requiring just one resistor.
From: STMicroelectronics AN1326 Application Note for L6565 Quasi-Resonant Controller
What is the start‑up current of the L6565?
The start‑up current before turn‑on with a 12 V supply is between 45 µA and 70 µA.
From: STMicroelectronics L6565 Quasi-Resonant SMPS Controller Datasheet