Description
The STEVAL-ISV012V1 demonstration board is based on the SPV1040 solar voltage boost converter and the L6924D single cell Li-ion battery charger.
The SPV1040 device is a high efficiency, 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.
Features
◾ SPV1040: solar boost converter with
embedded maximum power point tracking
(MPPT)
– Proprietary “perturb & observe” MPPT
algorithm
– Up to 95% efficiency
– Very low input voltage (down to 0.3 V)
– Input reverse polarity protection
– Thermal shut-down
– Overcurrent protection
– Enable pin
◾ L6924D: Fully integrated linear charger
solution with power MOSFET, reverse blocking
diode and battery thermal control
– 1% battery voltage regulation accuracy
– Up to 1 A charge current with 7% accuracy
– Closed loop thermal regulation protection
for output current control
– Low battery leakage current
– Embedded quasi-pulse charging mode
maximizes charge rate from solar panel
– Selectable 4.1 V and 4.2 V output voltage
– JEITA compliant with external circuit
– Programmable charge, fast charge (up to 1
A), pre-charge, termination current,
precharge mode voltage threshold, charge
timer
– Multifunction pin for flexible charge process
termination
– Status outputs to drive LEDs or host
processor interface
– Battery absence detection
– NTC or PTC thermistor interface for battery
temperature monitoring and protection
– RoHS compliant