MAX17823B
12-Channel High-Voltage Data Acquisition System
Meets Toughest Automotive and Industrial OEM Requirements for Safety, Performance, and Reliability
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Key Features
Applications/Uses
| 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 |
| End Equipment | 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) | 7.9 |
Simplified Block Diagram
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 .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
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 |
| End Equipment | 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) | 7.9 |
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 .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
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