SPV1050TTR

Overview

The SPV1050TTR is an ultra-low power energy harvester and battery charger IC from STMicroelectronics, designed for photovoltaic and thermoelectric generators. It integrates four MOSFETs for boost or buck-boost DC-DC conversion and features an embedded Maximum Power Point Tracking (MPPT) algorithm to maximize energy extraction. The device includes two independent LDOs (1.8 V and 3.3 V) for powering companion ICs like MCUs and sensors. It supports cold start at 550 mV in boost mode and 2.6 V in buck-boost mode, with a maximum output current of 70 mA and an operating input voltage range up to 18 V.

Feature Summary

• Integrates transformerless energy harvesting capabilities for both PV modules and TEGs with high efficiency across various sources.
• Features an internal high-accuracy MPPT algorithm that can be enabled, disabled, or programmed via external resistors to optimize power extraction.
• Includes fully integrated MOSFETs supporting both boost and buck-boost DC-DC converter configurations without external magnetic components.
• Provides tight battery protection by monitoring end-of-charge voltage and minimum battery voltage thresholds to preserve battery life.

Applications

• Autonomous wireless sensor nodes powered by ambient light or thermal gradients
• Wearable devices utilizing thin-film solar modules for continuous operation
• IoT applications requiring ultra-low power management and battery charging

Procurement Notes

Verify the specific package variant, as the SPV1050TTR designation typically refers to the reel packaging format of the 20-VFQFPN component. Confirm compatibility with your system's input voltage requirements, noting the distinct cold-start thresholds for boost versus buck-boost configurations. Ensure that external resistor values are correctly calculated to trim the overvoltage and undervoltage protection thresholds according to your battery chemistry specifications.

Selection Notes

Select this component when designing systems that require simultaneous energy harvesting from low-voltage sources and precise battery management. It is suitable for applications needing integrated load switching and multiple regulated outputs for peripheral sensors. Consider the thermal performance and PCB layout requirements associated with the VFQFPN package and integrated MOSFETs during the design phase.

Part Context

The SPV1050 belongs to ST’s portfolio of photovoltaic ICs, specifically engineered to maximize power conversion from solar panels and thermoelectric generators. It is often evaluated using development kits such as the STEVAL-GPT001V1 for wearable applications or the STEVAL-IDS002V1 for autonomous sensor nodes, demonstrating its role in extending system autonomy through efficient energy scavenging.

Replacement Considerations

The SPV1040 is a related high-efficiency solar battery charger within the same product family, featuring a step-up DC-DC converter with embedded MPPT. Designers should compare the specific power requirements and configuration options between these models to ensure functional equivalence.

FAQ

What are the cold-start voltage requirements for the SPV1050?

In boost configuration, the IC requires 550 mV and 30 μA for cold start. In buck-boost configuration, it requires 2.6 V and 5 μA for cold start.

How does the SPV1050 protect the connected battery?

It guarantees tight monitoring of the end-of-charge voltage (VEOC) and minimum battery voltage (VUVP). The pass-transistor opens at these triggered thresholds to preserve battery life.