产品概述
描述
The STEVAL-ISV014V1 demonstration board provides a very high level of integration being based on the ST devices SPV1040 (solar energy harvester and power optimizer), STBC21 (single cell Li-Ion battery charger) and STC3100 (gas gauge).
The STEVAL-ISV014V1 controls the single-cell Li-Ion battery charging thanks to the STBC21, which can be supplied by a solar panel or by an USB (type-A connector) compatible supply. The battery charging status set by STBC21 can be controlled via I2C. Safety during the battery charge process is guaranteed by the gas-gauge controller device STC3100.
When the energy is provided by the solar panel, the SPV1040 optimizes the power extracted from the source and boosts the voltage, charging a 440mF super-capacitor, which is connected to the input stage of the STBC21 by a STS5PF30L P-channel power MOSFET.
Furthermore, the STEVAL-ISV014V1 can be used to supply a type-B USB compatible load by an external Li-Ion battery. In this case, the L6920 voltage boost controller will regulate the battery voltage up to the 5 V required by the USB standard.
Finally, the STEVAL-ISV014V1 has a dedicated charging monitor circuitry implemented by 4 LEDs and by the TS339 quad comparator.
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所有功能
- Solar section
- Solar energy harvester with proprietary “Perturb and Observe” embedded MPPT algorithm
- Reverse polarity protection for solar panel connection
- Battery charging section
- Both linear and quasi-pulse operation, with programmable charge current (up to 1 A) in both fast charge and pre-charge mode
- Selectable 4.1 V and 4.2 V output voltage (±1% accuracy)
- Programmable termination current, pre-charge mode voltage threshold and charge time setting by I2C
- Coulomb counter available via I2C
- Status outputs to drive LEDs or host processor interface
- Charge status LED indicator
- Battery protection section
- Battery absence detection
- Battery thermal control (monitoring and protection) by NTC or PTC thermistor interface
- 5 V USB supply output from external battery
- RoHS compliant
- Solar section