ST SPV1040T

The SPV1040 device is a low power, low voltage, monolithic step-up converter with an input voltage range from 0.3 V to 5.5 V, capable of maximizing the energy generated by solar cells (or fuel cells), where low input voltage handling capability is extremely important. Thanks to the embedded MPPT algorithm, even under varying environmental conditions (such as irradiation, dirt, temperature) the SPV1040 offers maximum efficiency in terms of power harvested from the cells and transferred to the output. The device employs a voltage regulation loop, which fixes the charging battery voltage via a resistor divider. It is possible to set the maximum output current according to charging requirements by a sense resistor. The SPV1040 protects itself and other application devices by stopping the PWM switching if either the maximum current threshold (up to 1.8 A) is reached or the maximum temperature limit (up to 155 °C) is exceeded. An additional built-in feature of the SPV1040 is the input source reverse polarity protection, which prevents damage in case of reverse connection of the solar panel on the input. The SPV1040 is a monolithic, high efficiency, low voltage, self-powered DC-DC converter that operates over a 0.3 V to 5.5 V DC input voltage range and provides a single output voltage. The device provides regulated output voltage and current by sensing the VCTRL feedback of the external resistor divider and the voltage drop on the external sense resistor Rs, respectively. High efficiency is ensured by low power consumption in any working mode and by the embedded perturb and observe MPPT algorithm. The SPV1040 guarantees its own safety and application safety by stopping the N-channel power switch in case of overcurrent or overtemperature conditions.

• 0.3 V to 5.5 V operating input voltage
• 140 mΩ internal synchronous rectifier
• 120 mΩ internal power active switch
• 100 kHz fixed PWM frequency
• Duty cycle controlled by MPPT algorithm
• Output voltage regulation, overcurrent and overtemperature protection
• Input source reverse polarity protection
• Built-in soft-start
• Up to 95% efficiency
• TSSOP8 package 3×4.4 mm

• Smart phones and GPS systems
• Wireless headsets
• Small appliances, sensors
• Portable media players
• Digital still cameras
• Toys and portable healthcare