Nuvoton KA49713A – Battery Monitoring IC, Daisy-Chain, QFP-48

Nuvoton KA49713A is a battery monitoring IC (BMIC) for stacks of up to 16 series-connected lithium-ion cells. Daisy-chain communication allows up to 55 ICs to be connected in series, enabling a single host processor to monitor large high-voltage battery systems.

Series Overview

The KA49713A belongs to Nuvoton's stackable battery monitoring IC series, developed alongside the KA49703A for battery backup units (BBUs) in AI servers and large-scale energy storage systems. The series builds on automotive-proven daisy-chain communication technology and supports 400V and 800V high-voltage architectures. Mass production is scheduled to start in September 2026, with samples already available.

Configuration and Features

• Monitoring of up to 16 battery cells per IC
• Daisy-chain and SPI communication interface, cascading of up to 55 devices
• Voltage measurement accuracy of ±2.9 mV
• Internal diagnostic and fail-safe functions reducing the need for external protection circuitry
• Operating current consumption of 190 µA with intermittent 250 ms operation
• Dedicated transportation and storage mode with shutdown current below 0.1 µA, exclusive to the KA49713A
• Compact QFP-48 package measuring 7 mm x 7 mm

Typical Applications

The KA49713A is designed for high-voltage battery systems with many series-connected cells.

• Battery backup units (BBUs) for AI servers
• Large-scale energy storage systems (ESS)
• High-voltage battery stacks with 400V/800V architecture
• Industrial and infrastructure applications with serial cell stacks

Note for Development or Procurement

As the KA49713A will not enter mass production until September 2026 but is already available as a sample, early coordination on availability and design-in is recommended. For questions on samples, lead times, or integration into existing BBU and ESS designs, reach out via the Atlantik Elektronik contact page.