Summary
This note describes the performances of a 90 W, wide-range mains, power-factor-corrected AC-DC adapter reference board. Its electrical specification is tailored on a typical hi-end portable computer power adapter. The peculiarities of this design are the very low no-load input consumption (<0.4 W) and the very high global efficiency.
The architecture is based on a two-stage approach: a front-end PFC pre-regulator based on the L6563 TM PFC controller and a downstream multi-resonant half-bridge converter that makes use of the new L6599 resonant controller. The Standby function of the L6599, pushing the DCDC converter upon recognition of a light load to work in burst mode and the logic dedicated to stop the PFC stage allows meeting the severe no-load consumption requirement.
The PFC TM operation and the top-level efficiency performance of the HB-LLC topology provide also a very good overall efficiency of the circuit.
Specifications
| Manufacturer | STMicroelectronics |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | AC/DC SMPS - Single Output |
| Eval Board Part Number | 497-10542-ND |
| Eval Board Supplier | STMicroelectronics |
| Eval Board |
Board not Stocked
|
| AC Voltage |
115 V
230 V Universal (115 / 230V) |
| Outputs and Type |
1 Isolated
|
| Voltage Out |
19 V
|
| Current Out |
4.7 A
|
| Output Power |
90 W
|
| Features |
Light Load Mode
Over Current Protection PFC Short Circuit Protection Soft Start Under Voltage Protection, Brown-Out |
| Efficiency @ Conditions |
>91%, 230V in, 19V @ 1.7 ~ 4.7 A
>90%, 115V in, 19V @ 1.7 ~ 4.7 A |
| No-load Input Power @ Voltage |
280 mW @ 115 V
340 mW @ 230 V |
| Switching Frequency |
90 kHz
|
| Internal Switch |
No
|
| Component Count + Extras |
136 + 2
|
| Voltage In |
90 ~ 264 VAC
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
Computers
|
| Main I.C. Base Part |
L6563
L6599 |
| Date Created By Author | |
| Date Added To Library | 2011-03 |
Eval Board
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