November 2014

DocID027028 Rev 2

1/5

For further information contact your local STMicroelectronics sales

office

www.st.com

STEVAL-ISA161V1

Evaluation board for the SEA01 constant voltage and current

controller with online digital trimming

Data brief

Features



Universal input mains range: 90 to 264 Vac,

45 to 66 Hz



65 W continuous output power



Precise output levels:



CV: 19 V ± 0.1%



CC: 3.75 A ± 1.67%



No load consumption < 100 mW @ 230 Vac



Average efficiency > 89%



Full set of protection features



EMI: in accordance with EN55022 - class B



Safety: in accordance with EN60950



PCB: CEM-1, single side 35 µm



Board size: 58 x 121 mm, 25 mm height



RoHS compliant

Description

The STEVAL-ISA161V1 is an evaluation board to

test the performance of the SEA01 constant

voltage and current controller with online digital

trimming from STMicroelectronics. The board

implements a 65 W adapter, targeting

applications such as power supplies for high-end

portable computers. The board uses the SEA01

as secondary side CV/CC controller, allowing the

application to satisfy very precise output voltage

and current regulations thanks to the digital

trimming technique employed. The primary side

PWM controller is the L6566B. This device drives

a TM flyback topology, the best fit for this type of

application.

The SEA01 is mounted on a small daughterboard

that includes a connector to communicate, via I²C

protocol, with an external trimming tool. This

evaluation board can therefore be useful also as

a means to test the benefits of digital trimming in

a real application. The SEA01, housed in an SO8

package, is a CV/CC controller which includes 2

transconductance op-amps and 2 voltage

references, digitally trimmable using an I²C

interface. ST also offers an advanced trimming

board (STEVAL-PCC019V1) that allows users to

perform all the trimming operations (including

based PC.