SPV1050 Energy Harvester and Battery Charger

The STMicroelectronics SPV1050 is an ultra-low-power energy harvester with integrated battery charger that helps designers achieve high efficiency and small form factor critical for a remote sensing node. The full-bridge DC-DC converter, configurable either in a boost or buck-boost topology for a wide input voltage range to fit both photovoltaic (PV) cells or thermal energy generators (TEG), is controlled by a maximum power point tracking algorithm (MPPT) that can boost the energy harvested by 60%. The SPV1050 is available in a 5 x 5 mm, 20-lead QFN package and in die form.

Features

• Transformerless thermoelectric generators and PV modules energy harvester
• High efficiency for any harvesting source
• Up to 70 mA maximum battery charging current
• Fully integrated buck-boost DC-DC converter
• Programmable MPPT by external resistors
• 2.6 V to 5.3 V trimmable battery charge voltage level (±1% accuracy)
• 2.2 V to 3.6 V trimmable battery discharge voltage level (±1% accuracy)
• Two fully independent LDOs (1.8 V and 3.3 V output)
• Enable/disable LDO control pins
• Battery disconnect function for battery protection
• Battery connected and ongoing charge logic open drain indication pins