ZMDI Smart Charger for Lithium-Ion Batteries

ZMDI announces the release of the ZSPM4551, a DC/DC synchronous switching lithium-ion (Li-ion) battery charger. As a global supplier of analog and mixed-signal solutions for automotive, industrial, medical, information technology and consumer applications, ZMDI focuses on developing families of compact and high-efficiency products including the ZSPM4551.

The ZSPM4551 is configurable for termination voltage, charge current and additional variables to allow optimum charging conditions for a wide range of Li-ion batteries. Its 1MHz switching frequency enables the use of small filter components, resulting in smaller board space and reduced system costs. The ZSPM4551 has an integrated I2C(TM) (trademark of NXP) interface, which enables the user to set application-specific temperature-compensated termination voltages and control charging currents. It can regulate up to 1.5A continuous drive current. The ZSPM4551 features integrated power switches, internal compensation and fault protection. It offers Li-ion-specific protection for over-current, over-temperature, battery (VBAT) over-voltage and charging timeout. It includes supervisory reporting through the NFLT (inverted fault) open-drain output for interfacing with other components in the system.

The ZSPM4551 is in a league of its own when it comes to its high level of integration, up to 92% efficiency with typical loads and ultra-low power consumption. When the regulator is disabled, the device typically draws 10microA quiescent current. Pricing is USD1.65/Euro 1.22 @ 1Ku