MAX1507ETA+

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MAX1507ETA+ Application Field and Working Principle

The MAX1507ETA + is designed for use in contemporary portable electronic devices, such as PDAs, digital cameras and digital music players, among others, and it is a very versatile and efficient battery charger solution. This LMIC (Low-Noise Monolithic IC) is a buck-boost DC-DC converter that provides constant current charge current and it is also capable of generating at start-up a low voltage or a negative voltage rail. It also employs a range of advanced features and management, like constant current-limiting, true-wide-input, reduced-output voltage ripple, accurate over-voltage and over-current protection.

The MAX1507ETA+ can work at an input voltage of 2.9V to 6.5V, allowing it to be used in an extended variety of power sources, while the system will maintain a constant charging current of up to 500mA. This LMIC implements an internal constant current regulator, allowing the user to conveniently set the desired output current without having to use any external components. It also employs soft-start, which allows for a necessary softening of the charging voltage, avoiding high-peak currents when it is enabled. Furthermore, it implements a hysteretic mechanism at start-up, to ensure linear output current to the battery.

The MAX1507ETA + also has several mechanisms for damage protection that offer resilience to high temperature, over-voltage, over-temperature and short-circuit conditions. This LMIC battery charger uses a true shutdown feature which means that low-power consumption is ensured when the device is off. Additionally, it features a True 0V Start-up capability, which means that the charger will operate regardless of the initial battery voltagestate.

In conclusion, the MAX1507ETA+ has many advantages over traditional MCU battery chargers, such as low power consumption, high efficiency, low ripple, robust protection and accuarcy. The use of this IC brings a substantial improvement in the overall performance of portable electronic devices, since it can handle multiple current sources, provides precise current limiting and ensures full protection of the battery. All this makes it a great choice for battery chargers in such applications.

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