This board implements a 75 W SMPS reference design, tailored to the specifications of a typical hi-end portable computer power supply (adapter). The peculiarities of this design are the very high efficiency at light load and the excellent global efficiency for a two-stage architecture. The high efficiency at high load is achieved without using synchronized rectification at secondary side and therefore offers a very cost effective solution.
The circuit is made up of two stages: a front-end PFC using the L6563 and a flyback converter based on the L6566A. The CV/CC controller TSM1014 allows the correct current limitation on the secondary side. The flyback stage works as master and it is dedicated to controlling the circuit operation, including the standby and protections. Additionally, it switches the PFC stage on and off by means of a dedicated pin (VCC_PFC), therefore helping to achieve an excellent efficiency even at light load, with low complexity.
Efficiency during active load and light load operation are compliant with Energy Star® Eligibility Criteria for both external (EPA rev. 2.0 EPS) and computer integrated (EPA rev. 4.0 COMPUTERS) power supplies. In addition, this design is also compliant with the latest computer requirements.
- Universal input mains range: 90 - 264 Vac- Frequency 45 - 65 Hz
- Output voltage: 19 V @ 4 A continuous operation
- Mains harmonics: Acc. to EN61000-3-2 Class-D or JEIDA-MITI Class-D
- Standby mains consumption: < 0.14 W @ 230 Vac, < 0.085 W @ 115 Vac
- Active load average efficiency: better than 87% without synchronous rectification
- EMI: According to EN55022-Class-B
- Safety: According to EN60950
- Dimensions: 78x170 mm, 25 mm component maximum height
- PCB: Single side, 70 μm, CEM-1, Mixed PTH/SMT
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Product Specifications (1)
|Resource title||Latest update|
|19 Sep 2016||
19 Sep 2016
Quality and Reliability
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||WEEE Compliant||Material Declaration**|
RoHS Compliance Grade
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
|Part Number||Order from Distributors||Order from ST||Core Product||Marketing Status||Supplier||ECCN (US)||ECCN (EU)||Country of Origin||Board production status||Budgetary Price (US$)*/Qty|
|EVL6566A-75WES4||No availability of distributors reported, please contact our sales office||L6563, L6566A||