Battery management PMIC combines several monitoring functions

19-02-2020 | Analog Devices | Power

Analog Devices ADP5360 Battery Management PMIC combines several functions that can monitor the output voltage for advanced battery management. The device has one high-performance linear charger for a single Li-Ion/Li-Poly battery with a programmable, ultra-low quiescent current fuel gauge. It also incorporates a battery protection circuit, one ultra-low quiescent buck, one buck-boost switching regulator, and a supervisory circuit. The charger operates at up to 6.8V to stop USB bus spiking through disconnect or connect scenarios.

The device features an internal isolation FET between the linear charger output and the battery node. The full battery protection options are activated when the device is in the battery overcharge and over-discharge fault conditions. The device fuel gauge employs a voltage-based algorithm with an adaptive filter limitation solution. The fuel gauge reports a real-time battery SOC for the rechargeable Li-Ion battery with the ultra-low quiescent current.

The device buck regulator operates at 1MHz switching frequency in FPWM mode. In hysteresis mode, the regulator delivers excellent efficiency at a low output power. The buck-boost regulator only functions in hysteresis mode and outputs a voltage less than or greater than the battery voltage. The supervisory circuits monitor the regulator output voltage and offer a power-on reset signal to the system. A watchdog timer and an external pushbutton can reset the microprocessor.

The I2C-compatible interface allows the programmability of all battery charging parameters, the protection threshold, the buck output voltage, and the status bit readback. The device functions over the −40C to +85C junction temperature range and is offered in a 32-ball, 2.56mm x 2.56mm WLCSP.

Typical applications include rechargeable Li-Ion/Li-Poly battery-powered devices, portable consumer devices, portable medical devices, and wearable devices.

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