STEVAL-ISA149V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – RoHS compliant

STEVAL-ISA149V1
19 V, 75 W Energy Star-compliant SMPS using the L6563S and
the L6566A
Data brief
Features
 Universal input mains range: 90 - 264 Vac,
Freq. 45 - 65 Hz
 Output voltage: 19 V @ 4 A continuous
operation
 Mains harmonics: in accordance with
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: greater than
87% without synchronous rectification
 EMI: in accordance with EN55022-Class-B
 Safety: in accordance with EN60950
 Dimensions: 78 x 170 mm, 25 mm
component maximum height
 PCB: single side, 70 μm, CEM-1, mixed
PTH/SMT
 RoHS compliant
Description
The STEVAL-ISA149V1 implements a 75 W
SMPS reference design, tailored to the
specifications of a typical high-end portable
computer power supply (adapter). The
peculiarities of this design are its very high
efficiency at light load, and excellent global
efficiency for a two-stage architecture. The high
efficiency at high load is achieved without using
synchronized rectification at the secondary side,
resulting in a very cost-effective solution.The
circuit is made up of two stages: a front-end PFC
using the L6563S, and a flyback converter based
on the L6566A. The CV/CC controller TSM1014
allows accurate current limitation on the
secondary side. The flyback stage works as
master and is dedicated to controlling circuit
operation, including standby and protection
functions. Additionally, it switches the PFC stage
on and off by means of a dedicated pin (VCC_PFC),
helping to achieve excellent efficiency even at
light load, with a low level of complexity.
Efficiency during active load and light load
operation is 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.
June 2016
DocID025877 Rev 2
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