Firmenblog über Mingjiada Supply Maxim MAX17841 Automotive SPI Communication Interface With Battery Management UART Protocol

Mingjiada Supply Maxim MAX17841 Automotive SPI Communication Interface With Battery Management UART Protocol

In the system architecture of new energy vehicles and energy storage BMS systems, secure and stable inter-board daisy-chain communication is a critical component in ensuring battery monitoring, status acquisition and fault early warning. Shenzhen Mingjiada Electronics Co., Ltd. — long-term supplier of the Maxim (now part of ADI) MAX17841 automotive SPI communication interface (ASCI). This device converts the MCU’s SPI signals into the daisy-chain communication protocol used by battery monitoring ICs, supports transformer-isolated daisy-chain networking, complies with the AEC-Q100 automotive standard, and is suitable for communication designs between automotive BMS and high-voltage battery packs.

Product Overview
The MAX17841 is an automotive SPI communication interface (ASCI) from Maxim that integrates an SPI port and a universal asynchronous receiver/transmitter (UART), specifically designed to connect to Maxim battery management devices.
The MAX17841’s UART can be configured to automatically perform Manchester encoding/decoding, message framing, parity checking, wake-up and ‘stay active’ signals, meeting the requirements of Maxim’s battery management UART protocol. The UART’s baud rate is programmable to 0.5 Mbps, 1 Mbps or 2 Mbps, and supports single-ended or differential signals. To improve host efficiency, the UART includes a 28-byte transmit buffer and a 62-byte receive buffer, providing host-configurable interrupt events.

MAX17841 Key Features:
Supports Maxim’s battery management UART protocol
SPI interface rates up to 4 MHz
UART baud rate programmable up to 2 Mbps
3.3 V or 5 V power supply
Ultra-low quiescent current
Transmit and receive buffers with programmable interrupts support UART message queuing
Manchester encoders and decoders reduce the load on the host controller
Operating temperature range: –40 °C to +105 °C (AEC-Q100 Class 2)
Complies with ASIL requirements

Typical Applications for the MAX17841
New energy vehicle battery management systems (BMS)
Electric and hybrid vehicles (EV/HEV)
Battery monitoring and communication for energy storage systems
Daisy-chain communication for automotive high-voltage battery packs
Bridging between battery monitoring ICs and MCUs
Management of multi-series battery packs in industrial applications
Communication interfaces for automotive electronic domain controllers

Frequently Asked Questions (FAQ)
Q1: What is the MAX17841?
A: The MAX17841 is an automotive SPI communication interface (ASCI) developed by Maxim (now part of ADI). It acts as a communication bridge between the master MCU and the battery monitoring IC, supporting both SPI and daisy-chain communication architectures.
Q2: What is the SPI speed of the MAX17841?
A: The MAX17841 supports SPI communication rates of up to 4 MHz, making it suitable for BMS communication requirements such as data acquisition and status polling for multi-string battery configurations.
Q3: What are the primary applications of the MAX17841?
A: It is primarily used in BMS systems for new energy vehicles, energy storage systems, high-voltage automotive battery pack communication, and as a bridge between multi-string battery monitoring ICs and MCUs.
Q4: How does the MAX17841 implement daisy-chain communication?
A: The device converts the MCU’s SPI signals into the battery monitoring IC daisy-chain communication protocol, enabling multiple battery monitoring ICs to be connected via a differential daisy-chain, thereby reducing the complexity of isolators and wiring.

Availability Information

Mingjiada Electronics has long specialised in the Maxim product range. The MAX17841 automotive SPI communication interface (MAX17841BGUE) is always in stock, and we support sample orders, small-batch purchases and full-reel supply. To confirm specific part numbers, stock levels and real-time prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.
Tags: MAX17841BGUE, MAX17841BGU, MAX17841BG, MAX17841B, MAX17841