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The ZSPM4551 is a DC/DC synchronous switching lithium-ion battery charger with fully integrated power switches, internal compensation, and full fault protection. This part is for batteries not charged via USB.
Its switching frequency of 1MHz enables the use of small filter components, resulting in smaller board space and reduced BOM costs.
In full-charge constant-current mode, the regulation is for constant current. Once termination voltage is reached, the regulator operates in voltage mode. When the regulator is disabled, the device draws 10µA quiescent current.
The ZSPM4551 includes supervisory reporting through the NFLT (inverted fault) open-drain output to interface other components int he system. Device programming ins achieved by an I2C interface through the SCL and SDA pins.
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