Single-chip intelligent battery management solution

Mouser now stocks the PAC22140 smart BMS from Qorvo. Helping to meet the need for higher cell counts in designs for users requiring more extended battery life, faster charging power and higher performance, Qorvo has expanded its current BMS portfolio with its first single-chip Power Application Controller device. The device supports battery packs with up to 20 cells in series (20s), using the company's hardware and firmware ecosystem, which can save designers more than 50% of their PCB space while lowering total BOM cost by 30% and reducing time to market.

The BMS is a complete battery management solution that uses an intelligent motor control foundation to facilitate cell balancing, monitoring and protection for 10s to 20s battery packs in a single device. The solution features an Arm Cortex-M0 and has access to analog and digital peripherals to allow fuel-gauging algorithms and system telemetry reporting. The device combines a Flash-programmable microcontroller, power management, current/voltage/temperature sense and drive circuits for charge/discharge FETs and protection fuses. A single supply, 145V input buck DC-DC controller generates gate drive voltages for the external charge/discharge FETs and external FUSE FET, and all the sub-regulators needed for the microcontroller and other sub-systems in the device. There are also high-side gate drivers on the device for charge and discharge protection FETs and a low-side driver for the battery-pack fuse or auxiliary function. Other device features comprise an integrated programmable-gain differential amplifier for a wide current sense range, two 16-bit sigma-delta ADCs for current sense and cell balancing and a 10-bit SAR ADC for added voltage and temperature sensing.

Also, it provides a low-power hibernate mode of less than 3µA, which supplies a long storage time with wakeup from a push button, timer or charger detection. The integrated high-voltage buck reduces thermal issues with the support of a 5V-regulated supply of up to 225mA, and the device's integrated 3.3V LDO supplies up to 90mA for the additional peripherals. The device also has a UART/SPI interface or I2C/SMBus interface for host communications.

The device is supplied in a compact 9mm x 9mm, 60-pin QFN package, ideal for space-constrained designs. Target applications include garden tools, power tools, E-transportation, broad industrial battery management solutions and other compact battery-monitoring uses.