MAX17823B
12-Channel High-Voltage Data Acquisition System
Meets Toughest Automotive and Industrial OEM Requirements for Safety, Performance, and Reliability
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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.
Key Features
- AEC-Q100 Grade 2 Temperature Range
- -40°C to +105°C
- Operating Voltage from 9V to 65V
- Ultra-Low-Power Operation
- Standby Mode: 2mA
- Shutdown Mode: 2μA
- 12 Cell-Voltage-Measurement Channels
- 2mV Accuracy (3.6V, +25° C)
- 5mV Accuracy (0°C to +45°C)
- 10mV Accuracy (-40°C to +105°C)
- 12 Cell-Balancing Switches
- Up to 150mA per Switch
- Emergency-Discharge Mode
- Two Temperature-Measurement Channels
- Die Temperature Measurement
- Automatic Thermal Protection
- 29 Voltage Threshold Alerts
- 12 Over-Voltage Faults
- 12 Under-Voltage Faults
- Two Over-Temperature Faults
- Two Under-Temperature Faults
- One Cell Mismatch Alert (highest cell versus lowest cell)
- Four GPIOs
- Built-in Diagnostics to Support ASIL D and FMEA Requirements
- Battery-Management UART Protocol
- Daisy-Chain Up to 32 Devices
- Communication Port Isolation
- Up to 2Mbps Baud Rate (Autodetect)
- 1.5µs Propagation Delay per Device
- Packet-Error Checking (PEC)
- Factory-Trimmed Oscillators
- No External Crystals Required
- 10mm x 10mm Package (64-Pin LQFP)
Applications/Uses
- Battery Packs
- Battery Systems
- Electric Bikes
- Electric Vehicles and Hybrid Vehicle (HEV)
- High-Power Battery Backup Systems
- High-Voltage, Multi-Cell Series-Stacked-
- Power Tools
- SuperCap Backup Systems
| Functions | Status Monitor |
| Battery Type | 1-12 Cell Li-Ion 3-16 Cell Li-Ion Multi-Cell Li-Ion |
| Interface | UART |
| Parameters Measured | Current Temperature Voltage |
| Applications | Host Pack |
| Battery Protection Features | Over Voltage Over-Current Over/Under Voltage |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 65 |
| Package/Pins | LQFP/64 |
| Oper. Temp. (°C) | -40 to +105 |
| Budgetary Price (See Notes) | $6.33 @1k |
Technical Docs
| Data Sheet | 12-Channel High-Voltage Data Acquisition System | Apr 03, 2020 |
Click any title below to view the detail page where available.
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| Functions | Status Monitor |
| Battery Type | 1-12 Cell Li-Ion 3-16 Cell Li-Ion Multi-Cell Li-Ion |
| Interface | UART |
| Parameters Measured | Current Temperature Voltage |
| Applications | Host Pack |
| Battery Protection Features | Over Voltage Over-Current Over/Under Voltage |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 65 |
| Package/Pins | LQFP/64 |
| Oper. Temp. (°C) | -40 to +105 |
| Budgetary Price (See Notes) | $6.33 @1k |
Key Features
- AEC-Q100 Grade 2 Temperature Range
- -40°C to +105°C
- Operating Voltage from 9V to 65V
- Ultra-Low-Power Operation
- Standby Mode: 2mA
- Shutdown Mode: 2μA
- 12 Cell-Voltage-Measurement Channels
- 2mV Accuracy (3.6V, +25° C)
- 5mV Accuracy (0°C to +45°C)
- 10mV Accuracy (-40°C to +105°C)
- 12 Cell-Balancing Switches
- Up to 150mA per Switch
- Emergency-Discharge Mode
- Two Temperature-Measurement Channels
- Die Temperature Measurement
- Automatic Thermal Protection
- 29 Voltage Threshold Alerts
- 12 Over-Voltage Faults
- 12 Under-Voltage Faults
- Two Over-Temperature Faults
- Two Under-Temperature Faults
- One Cell Mismatch Alert (highest cell versus lowest cell)
- Four GPIOs
- Built-in Diagnostics to Support ASIL D and FMEA Requirements
- Battery-Management UART Protocol
- Daisy-Chain Up to 32 Devices
- Communication Port Isolation
- Up to 2Mbps Baud Rate (Autodetect)
- 1.5µs Propagation Delay per Device
- Packet-Error Checking (PEC)
- Factory-Trimmed Oscillators
- No External Crystals Required
- 10mm x 10mm Package (64-Pin LQFP)
Applications/Uses
- Battery Packs
- Battery Systems
- Electric Bikes
- Electric Vehicles and Hybrid Vehicle (HEV)
- High-Power Battery Backup Systems
- High-Voltage, Multi-Cell Series-Stacked-
- Power Tools
- SuperCap Backup Systems
Description
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.
Technical Docs
| Data Sheet | 12-Channel High-Voltage Data Acquisition System | Apr 03, 2020 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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