SPV1040 Datasheet, PDF (1/15 Pages) STMicroelectronics – High efficiency solar battery charger with embedded MPPT

SPV1040
High efficiency solar battery charger with embedded MPPT
Features
■ 0.3 V to 5.5 V operating input voltage
■ 140 mΩ internal synchronous rectifier
■ 120 mΩ internal power active switch
■ 100 kHz fixed PWM frequency
■ Duty cycle controlled by MPPT algorithm
■ Output voltage regulation, overcurrent and
overtemperature protection
■ Input source reverse polarity protection
■ Built-in soft-start
■ Up to 95% efficiency
■ 3 mm x 4.4 mm TSSOP8 package
Applications
■ Smart phones and GPS systems
■ Wireless headsets
■ Small appliances, sensors
■ Portable media players
■ Digital still cameras
■ Toys and portable healthcare
Description
The SPV1040 device is a low power, low voltage,
monolithic step-up converter with an input voltage
range from 0.3 V to 5.5 V, and is capable of
maximizing the energy generated by even a
single solar cell (or fuel cell), where low input
voltage handling capability is extremely important.
Thanks to the embedded MPPT algorithm, even
under varying environmental conditions (such as
irradiation, dirt, temperature) the SPV1040 offers
maximum efficiency in terms of power harvested
from the cells and transferred to the output.
The device employs an input voltage regulation
loop, which fixes the charging battery voltage via
TSSOP8
a resistor divider. The maximum output current is
set with a current sense resistor according to
charging current requirements.
The SPV1040 protects itself and other application
devices by stopping the PWM switching if either
the maximum current threshold (up to 1.8 A) is
reached or the maximum temperature limit (up to
155 °C) is exceeded.
An additional built-in feature of the SPV1040 is
the input source reverse polarity protection, which
prevents damage in case of reverse connection of
the solar panel at the input.
Table 1. Device summary
Order codes
Package
SPV1040T
SPV1040TTR
TSSOP8
Packaging
Tube
Tape and reel
October 2011
Doc ID 18080 Rev 3
1/15
www.st.com
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