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May 2014 DocID025592 Rev 2 1/9
STEVAL-ISV020V1
Evaluation board for SPV1050 ULP energy harvester and battery
charger – buck-boost configuration
Data brief
Features
First startup at Vin = 2.6 V
Input voltage working range:
150 mV Vin 18 V
End of charge battery voltage: V
EOC
= 4.25 V
Battery undervoltage protection: V
UVP
= 3.7 V
Applications
Charge any battery chemistry, including lithium
based, NiMH, solid state thin film and
supercapacitor.
WSN, HVAC, building and home automation,
industrial control, access control, smart
lighting, asset and livestock positioning and
tracking, surveillance.
Body area network, sportswear, fitness.
Description
The STEVAL-ISV020V1 is an evaluation board
based on the ultralow power energy harvester
and battery charger SPV1050. For any detail
related to the SPV1050 features and
performances please refer to the datasheet.
The evaluation board implements the buck-boost
configuration of the DC-DC converter and has the
purpose of enhancing the SPV1050 based
applications development by testing the silicon
performance thanks to many jumpers and test
points, and by helping to find out the best system
configuration to make the SPV1050 device
working at the most of efficiency.
The STEVAL-ISV020V1 board is optimized to:
Harvest energy from PV panels supplying
2.6 V
V
MP
9 V and 10 A I
MP
20 mA.
Charge a battery with the 3.7 V undervoltage
protection threshold (V
UVP
) and 4.2 V end of
charge voltage threshold (V
EOC
).
Nevertheless, few easy changes on the
application components (input and output resistor
partitioning, C
IN
capacitor) allow to use a different
PV panel and source (like TEG), and battery, by
setting the V
MPP_SET
, the V
UVP
and the V
EOC
thresholds according to the source and load.
More in detail, operating ranges can be extended
as follows: V
MP
from 150 mV up to 18 V, I
MP
up to
100 mA, V
UVP
down to 2.2 V and V
EOC
up to
5.3 V.
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