Overview
The MAX17843, produced by Analog Devices Inc./Maxim Integrated, is a highly integrated, high-voltage, 12-channel battery-monitoring smart data-acquisition interface. This component is optimized for use in various battery systems, including those in automotive systems, hybrid electric vehicles, electric cars, and other applications involving long series strings of secondary metal batteries. It features a robust analog front-end with a 12-channel voltage-measurement data-acquisition system and high-voltage switch-bank input, ensuring accurate differential measurements across each cell.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 12 |
| Measurement Range | 0 to 5.0V (usable range: 0.2V to 4.8V) |
| ADC Resolution | 14-bit with oversampling |
| Measurement Time | All 12 cells in under 142μs |
| Auxiliary Analog Inputs | Two (for NTC thermistor or absolute voltage measurement) |
| Cell-Balancing Switches | 12 internal switches, up to 150mA per switch |
| Input Linear Regulator | Integrated 9V to 65V |
| Operating Temperature Range | -40°C to +125°C (AEC-Q100 Grade 1) |
| Package Type | 64-Pin, Lead-Free/RoHS-Compliant, 10mm x 10mm LQFP |
Key Features
- High-accuracy differential measurement I/Os with ±2mV accuracy at +25°C and 3.6V
- Integrated 12-channel data-acquisition system with differential high-voltage mux to ADC
- Redundant ADC for enhanced reliability
- Battery fault detection with overvoltage and undervoltage digital threshold detection
- Enhanced diagnostic features for fault detection to support ASIL and FMEA
- Emergency cell-discharge mode
- Integrated temperature-compensated, voltage reference
- Robust differential daisy-chain UART interface supporting up to 32 connected ICs
- Four general-purpose digital I/O lines
- Ultra-low-power dissipation with 2.0mA (typ) standby-mode supply current and 3μA shutdown mode leakage current
Applications
- 48V Vehicle Battery Modules or Systems
- High-Voltage Electric Vehicles (EVs)
- Hybrid Electric Vehicles (HEVs)
- Battery Packs
- Electric Bikes
- High-Power Battery-Backup Systems
- Super-Cap Backup Systems
- Power Tools
Q & A
- What is the primary function of the MAX17843?
The MAX17843 is a 12-channel battery-monitoring smart data-acquisition interface designed for high-voltage battery systems.
- What is the measurement range of the MAX17843?
The measurement range is from 0 to 5.0V, with a usable range of 0.2V to 4.8V.
- How many channels does the MAX17843 support?
The MAX17843 supports 12 channels.
- What is the resolution of the ADC in the MAX17843?
The ADC resolution is 14-bit with oversampling.
- How long does it take to measure all 12 cells?
All 12 cells can be measured in under 142μs.
- Does the MAX17843 support temperature measurement?
Yes, it supports die temperature measurement and has two auxiliary analog inputs for NTC thermistor or absolute voltage measurement.
- What is the operating temperature range of the MAX17843?
The operating temperature range is -40°C to +125°C (AEC-Q100 Grade 1).
- What type of package does the MAX17843 come in?
The MAX17843 comes in a 64-Pin, Lead-Free/RoHS-Compliant, 10mm x 10mm LQFP package.
- Does the MAX17843 have built-in diagnostics?
Yes, it has built-in diagnostics to support ASIL D and FMEA requirements.
- What is the typical standby-mode supply current of the MAX17843?
The typical standby-mode supply current is 2.0mA.
