Analog Devices Inc./Maxim Integrated

The MAX17823B is a data acquisition system for the management of high-voltage battery modules. The system features 12-bit SAR ADC that can measure 12 cell voltages and two temperatures in 161μs. There are 12 internal switches for cell balancing and extensive built-in diagnostics. Up to 32 devices can be daisy-chained together to manage 384 cells and monitor 64 temperatures.Cell voltages (0 to 5V) are measured differentially over a 65V common-mode range. Cell measurements have a typical accuracy of 2mV (3.6V cell, +25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.The system uses Maxim’s battery-management UART protocol for robust communications and when used in conjunction with the MAX17880 12-channel battery monitor, they are ideal for automotive battery-management systems that require a high safety integrity level.ApplicationsBattery PacksBattery SystemsElectric BikesElectric Vehicles and Hybrid Vehicle (HEV)High-Power Battery Backup SystemsHigh-Voltage, Multi-Cell Series-Stacked-Power ToolsSuperCap Backup Systems

The MAX17823B is a data acquisition system for the management of high-voltage battery modules. The system features 12-bit SAR ADC that can measure 12 cell voltages and two temperatures in 161μs. There are 12 internal switches for cell balancing and extensive built-in diagnostics. Up to 32 devices can be daisy-chained together to manage 384 cells and monitor 64 temperatures.Cell voltages (0 to 5V) are measured differentially over a 65V common-mode range. Cell measurements have a typical accuracy of 2mV (3.6V cell, +25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.The system uses Maxim’s battery-management UART protocol for robust communications and when used in conjunction with the MAX17880 12-channel battery monitor, they are ideal for automotive battery-management systems that require a high safety integrity level.ApplicationsBattery PacksBattery SystemsElectric BikesElectric Vehicles and Hybrid Vehicle (HEV)High-Power Battery Backup SystemsHigh-Voltage, Multi-Cell Series-Stacked-Power ToolsSuperCap Backup Systems

The MAX17823H is a data acquisition system for the management of high-voltage battery modules. The system features a 12-bit SAR ADC that can measure 12 cell voltages and two temperatures in 161 µs. There are 12 internal switches for cell-balancing and extensive built-in diagnostics. Up to 32 devices can be daisy-chained together to manage 384 cells and monitor 64 temperatures.Cell voltages (0V to 5V) are measured differentially over a 65V common-mode range. Cell measurements have a typical accuracy of 2mV (3.6V cell, 25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.The system uses Maxim’s battery-management UART protocol for robust communications and, when used in conjunction with the MAX17880 12-channel battery monitor, is ideal for automotive battery-management systems that require a high safety-integrity level.ApplicationsBattery-Backup Systems (UPS)Battery-Powered ToolsElectric BikesElectric Vehicles (EVs)High-Voltage Battery StacksHybrid Electric Vehicles (HEVs)Super-Cap Systems

The MAX17843 is a programmable, highly integrated, high-voltage, 12-channel battery-monitoring smart data-acquisition interface with extensive features for safety. It is optimized for use with batteries used in automotive systems, hybrid electric battery packs, electric cars, and any system that stacks long series strings of secondary metal batteries. This highly integrated battery sensor incorporates a high-speed differential UART bus for robust daisy-chained serial communication.The analog front-end combines a 12-channel voltage-measurement data-acquisition system with a high-voltage switch-bank input. All measurements are done differentially across each cell. The full-scale measurement range is from 0 to 5.0V with a usable range of 0.2V to 4.8V. A high-speed successive approximation (SAR) A/D converter is used to digitize the cell voltages at 14-bit resolution with oversampling. All 12 cells can be measured in under 142µs. The MAX17843 uses a 2-scan approach for collecting cell measurements and correcting them for errors. This 2-phase approach yields excellent accuracy over temperature and in the face of extreme noise in the system.The MAX17843 has two auxiliary analog inputs that can be used to measure external thermistor components. A negative temperature coefficient (NTC) thermistor can be configured with the AUXIN analog inputs to accurately monitor module or battery-cell temperature. A thermal-overload detector disables the MAX17843's linear regulator to protect the IC, and a die-temperature measurement is also available.Applications48V Vehicle Battery Modules or SystemsBattery PacksElectric BikesHigh-Power Battery-Backup SystemsHigh-Voltage Electric Vehicle (EVs)Hybrid Electric Vehicles (HEVs)Power ToolsSuper-Cap Backup Systems