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SPV1040

High efficiency solar battery charger with embedded MPPT

STMicroelectronics 

SPV1040

High efficiency solar battery charger with embedded MPPT

Features

■ 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

■ 3 mm x 4.4 mm TSSOP8 package

Applications

■ Smart phones and GPS systems

■ Wireless headsets

■ Small appliances, sensors

■ Portable media players

■ Digital still cameras

■ Toys and portable healthcare

Description

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, and is capable of

maximizing the energy generated by even a

single solar cell (or fuel cell), 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 an input voltage regulation

loop, which fixes the charging battery voltage via

TSSOP8

a resistor divider. The maximum output current is

set with a current sense resistor according to

charging current requirements.

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 at the input.

Table 1. Device summary

Order codes

Package

SPV1040T

SPV1040TTR

TSSOP8

Packaging

Tube

Tape and reel

October 2011

Doc ID 18080 Rev 3

1/15

www.st.com

15

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