AN2321 is an application note released by ST, introducing a high-performance L6599-based HB-LLC adapter, suitable for laptop computers. This design has very low no-load input consumption(<0.4 W) and very high global efficiency.
This document describes a 90W, wide-range mains, power-factor-corrected AC-DC adapter reference board designed for laptop computers. The design features very low no-load input consumption (less than 0.4W) and high global efficiency. The architecture utilizes a two-stage approach: a front-end PFC pre-regulator based on the L6563 controller and a downstream multi-resonant half-bridge converter using the L6599 resonant controller.
| Output voltage | 19 V |
|---|---|
| Output current | 4.7 A |
| Input mains range | 90-264 Vac |
| Frequency range | 45 to 65 Hz |
| Standby consumption (230 Vac) | Typ. 0.4 W |
| Overall efficiency | better than 90% |
| Maximum height | 25 mm |
The output is 19 V at 4.7 A for continuous operation.
The design supports a universal input range of 90 to 264 Vac at a frequency of 45 to 65 Hz.
The typical standby mains consumption is 0.4 W at 230 Vac.