MAX17852
14-Channel High-Voltage, ASIL D, Data-Acquisition System with Integrated Current-Sense Amplifier
Industries Leading ASIL D Battery Monitor ASIC with Current Sensing
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Overview
Features and Benefits
- AECQ-100 Grade 1 Temp. Range -40°C to 125°C
- 65V Operating Voltage
- Ultra-Low-Power Operation
- Standby Mode: 2mA
- Shutdown Mode: 2µA
- Redundant ADC and Comparator Acquisitions
- Simultaneous Cell and Bus-Bar Voltage Acquisitions
- 14 Cell-Voltage Measurement Channels
- 1mV Accuracy (3.6V, 25°C)
- 2mV Accuracy (5°C to 40°C)
- 4.5mV Accuracy (-40°C to 125°C)
- 14 Cell-Balancing Switches
- > 300mA Software-Programmable Balancing Current
- Optimized Driving (AUTOBALSWDIS) and Parking Balancing Modes
- Automated Balancing with Individual Cell Timers
- Automated Balancing by Cell Voltage
- Emergency Discharge Mode
- Low-Noise Current-Sense Amplifier
- 5mA resolution (Gain = 256)
- Four Configurable Auxiliary Inputs for Temperature, Voltage, or GPIO
- Integrated Die Temperature Measurement
- Automatic Thermal Protection
- Individually Configurable Safety Alert
- Overvoltage, Undertemperature and Undervoltage, Overtemperature Faults
- One Cell-Mismatch Alert
- Support ASIL-D Requirements for Cell Voltage, Temperature, Current, Communication
- Selectable UART, Dual UART, or SPI Interface
- Battery-Management UART Protocol
- Daisy-Chain Up to 32 Devices
- Capacitive Communication-Port Isolation
- Up to 2 Mbps Baud Rate (auto-detect)
- 1.5µs Propagation Delay (per device)
- Packet-Error Checking (PEC)
- I2C Master
- Configurable Hardware-Alert Interfaces
- Factory-Trimmed Oscillator (No External Crystals Required)
- 32-Bit Unique Device ID
- 64-Pin (10mm x 10mm) LQFP Packagenn
Product Details
The MAX17852 is a flexible data-acquisition system for the management of high-voltage and low-voltage battery modules. The system can measure 14 cell voltages, one current measurement, and a combination of four temperatures or system voltages with fully redundant measurement engines in 263µs, or perform all inputs solely with the ADC measurement engine in 156µs. There are 14 internal switches rated for > 300mA for cell-balancing, each supporting extensive built-in diagnostics. Up to 32 devices can be daisy-chained to manage 448 cells and monitor 128 temperatures.
Cell and bus-bar voltages ranging from -2.5V to +5V are measured differentially over a 65V common-mode range, with a typical accuracy of 1mV (3.6V cell, 25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution and combined with digital post-processing IIR filtering for increased noise immunity. The system can shut itself down in the event of a thermal overload by measuring its own die temperature.
For robust communications, the system uses Maxim’s battery- management UART or SPI protocol for robust communications and supports an I2C master interface for external device control, and is optimized to support a reduced feature set of internal diagnostics and rapid-alert communication through both embedded communication and hardware-alert interfaces to support ASIL-D and FMEA requirements.
Applications
- 48V system
- Battery Backup Systems (UPS)
- Battery Powered Tools
- Electric Bikes
- Electric Vehicles (EV)
- High Voltage Battery Stacks
- Hybrid Electric Vehicles (HEV's)
- Super-Cap Systems
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
Reference Designs (3)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX17852ACB/V+ | Material Declaration | Reliability Data | 64-LQFP-10X10X1.4 | |
| MAX17852ACB/V+T | Material Declaration | Reliability Data | 64-LQFP-10X10X1.4 | |
| Wafer Fabrication Data |
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.