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Optimal efficiency increases harvested energy by 30% to 70%
The bq25504 is a highly efficient boost charger IC for nano (ultra-low) power energy harvesting and management applications. The device manages microwatts (µW) to milliwatts (mW) of power generated from a variety of sources such as solar, thermal electric, electromagnetic and vibration energy.
Its low quiescent current, high conversion efficiency, and flexibility in interfacing to a variety of energy sources and energy storage elements makes the IC unique to the market. The device's unique properties can be best illustrated in a solar panel example. Under certain operating conditions, with comparable light intensity, the bq25504 can increase the usable harvested energy by 30% to 70%, which allows for the reduction in the solar panel collection area, the number of solar panels required and the charging time; all of which help to reduce the cost of end equipment solutions.
Key benefits and features
- Low quiescent current (330nA typ) and high conversion efficiency maximizes the energy extracted from the energy harvester.
- Maximum power point tracking (MPPT) optimizes energy extracted from DC harvesters such as solar panels and thermo electric generators under varying light and thermal conditions respectively.
- User programmable settings allows the IC to be used with a variety of energy sources and energy storage elements (different battery chemistries or super capacitors)
Key benefits and features
- Low cold start voltage (330mV typ) allows the device to startup from single cell solar panels (under low light), TEG with low temperature differences and other low voltage sources.
- Battery OK indicator allows conditional enabling of external loads and protects the storage element.
Wireless sensor networks (WSN) applications
- Agriculture (gravity feed systems, water tank levels, pump levels)
- Air pollution
- Area monitoring
- Forest fire detection
- Greenhouse monitoring
- Home and building automation
- Industrial monitoring
- Landslide detection
- Machine health monitoring (machinery condition-based systems)
- Structural monitoring (monitor movement within buildings and infrastructure, monitor assets, retrieve daily data)
- Waste/water monitoring
Applications
- Consumer electronics
- Computer peripherals
- Industrial
- Medical
- High reliability
bq25504 - Solar Application Schematic
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