Industrial BMIC Solutions

Industrial Battery Monitoring IC Solutions

Nuvoton's BMIC family delivers flexible, safe, and scalable battery monitoring for the full industrial spectrum — from 18 V power tools to >1500 V grid-scale energy storage systems.

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12V
Min System Voltage
72V
Max System Voltage
17ch
Max Cell Channels/BMIC*

*spec. for non-stackable KA49702A

KA49702A Reference Design Block Diagram
BMIC Product Series — Industrial & Automotive
Product Lineup

Complete BMIC Family

From compact low-voltage non-stackable designs to high-voltage stackable architectures — Nuvoton has a BMIC solution for every application.

Non-Stackable · Low Side
KA49701A
Up to 72 V

17-channel low-side driver BMIC for cost-optimized industrial battery packs in power tools, portable ESS, and light EVs.

  • Cell Count4S – 17S
  • FET DriverLow Side
  • Accuracy±2.9mV @25℃
  • Supply Current260 µA
  • Cell BalanceYes (odd/even)
  • Fault ProtectionOV/UV, OC/UC, OT/UT
  • DiagnosticsCurrent ADC
  • PackageQFP48
  • GradeIndustrial
KA49701A
Non-Stackable · High Side
KA49702A
Up to 72 V

17-channel high-side driver BMIC for wider voltage range applications including e-mobility, golf carts, and residential low-voltage ESS.

  • Cell Count4S – 17S
  • FET DriverHigh Side
  • Accuracy±2.9mV @25℃
  • Supply Current260 µA
  • Cell BalanceYes (odd/even)
  • Fault ProtectionOV/UV, OC/UC, OT/UT
  • DiagnosticsCurrent ADC
  • PackageQFP48
  • GradeIndustrial
KA49702A
Stackable · Industrial
KA49703A
>72 V to ~3 kV

16-channel stackable BMIC for high-voltage ESS, grid storage, and residential/commercial solar systems. Up to 55 BMICs stackable for 880 cells series total / ~3kV architectures.

  • Cell Count16S per IC
  • Accuracy±2.5mV @25℃
  • Supply Current260 µA
  • Cell BalanceYes (adjacent simultaneous)
  • Fault ProtectionOV/UV, OT/UT
  • ArchitectureDaisy-chain
  • PackageQFP48
  • PMICKA84917
  • GradeIndustrial
KA49703A KA84917
Nuvoton KA49702A Evaluation Board

Nuvoton KA49702A BMIC Evaluation Board — complete development platform for 4S–17S battery systems.

Product Overview

KA49702A: Purpose-Built for Reliable 18V to 60V Batteries

The KA49702A BMIC enables efficient battery capacity utilization with high voltage measurement accuracy, advanced safety/diagnostics features, and low power operation.

  • 17 cell LFP, NMC monitoring
  • Over Temp, Under Temp, Over Voltage, Under Voltage, Over Current Monitoring
  • Built-in self-diagnostics: ADC, MUX, FET, Fuse, Open Wire
  • +/− 2.9mV Accuracy with Hardware Cell Voltage Measurement Averaging
  • Only 260 µA operating current and <0.1 µA Shutdown
  • 12V–60V Full BMS Reference Design
Reference Designs & Development Boards (ARM Cortex)

Accelerate Your Development

SDK, HDK, Device Drivers, Development Support — ready-to-use BMS reference designs that reduce engineering risk and compress time-to-market.

Design Type BMIC MCU Voltage Range Target Application Key Features
Non-Stack RD1 KA49702A
17ch		 M2L3x – Low-Power M23 16–60 V · 4S–17S Power tools, portable batteries, medical Low power, built-in LCD Driver, cap touch
Stackable RD1 KA49703A
16ch		 M33x / M3351 (M33 | M55) >100 V ESS, industrial storage, commercial storage Isolated Daisy-chained PCBs with BMIC, Pack Monitoring PMIC, Isolated Communications COMM IC, MCU
Product Literature

Resources & Downloads

Datasheets, reference designs, brochures, and technical resources for the Nuvoton BMIC portfolio.

📄
Product Brochure

Fail-Safe BMIC with Hardware Diagnostics — full feature overview of the KA49701A/702A family.

⬇ Download PDF
📊
Nuvoton BMIC Portfolio Overview

Complete overview of the Nuvoton battery monitoring IC product family — to be supplied.

⬇ Download PDF
📐
KA49702A 17-ch Non-Stackable BMIC Datasheet

Full electrical specifications, timing diagrams, and register maps for the KA49702A.

⬇ Download 🔗 Webpage
📋
Reference Design User Manual

Hardware and software guide for the 4S–17S complete BMS reference design.

⬇ Download
📐
KA49703A 16-ch Stackable BMIC Datasheet

16-channel stackable BMIC for high-voltage ESS up to ~3 kV. Request access below.

✉ Request Datasheet
🔗
Nuvoton BMIC Home Page

Full battery monitoring IC product family, datasheets, tools, and support on Nuvoton.com.

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Target Markets

Applications Across the Industrial Spectrum

Nuvoton BMIC solutions serve the fastest-growing battery application segments globally.

🔧
Cordless Power Tools
12–60 V · 4S–16S
KA49701A/702A
🌿
Garden Equipment
24–60 V · 6S–16S
KA49701A/702A
🚲
E-Bikes & Pedelecs
36–48 V · 10S–13S
KA49702A
🤖
Robotics & Industrial EVs
60–400 V · 16S–108S
KA49702A or KA49703A
🏠
Residential ESS
48–100 V+ · 13S–27S+
KA49702A or KA49703A
⚡
Portable Power Systems
12–60 V · 4S–16S
KA49702A
🏭
Industrial ESS
200–800 V+ · 54S–216S
KA49703A + KA84917
🔌
Grid-Scale ESS
1 kV–1.5 kV+ · 270S–405S+
KA49703A + KA84917