Saturday, February 24, 2024

Fast And Efficient Automotive Battery Monitoring ICs

By Nidhi Agarwal

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ABLIC’s S-19114 series delivers voltage detection for enhanced vehicle safety in compact, low-consumption designs suitable for EVs, HEVs, and PHEVs.

ICs

ABLIC has introduced the S-19114 Series, a line of automotive high-withstand voltage battery monitoring ICs known for their fastest voltage detection response, particularly suitable for challenging conditions. Modern vehicles encompass an array of safety provisions. For instance, there’s a safeguard against disruptions in voltage supply from the battery to the Engine Control Unit (ECU). When the power supply from the battery is interrupted, it results in a drop in voltage to the ECU. Once this voltage drop is identified, the ECU initiates a secure reset process. This reset operation demands a specific duration, typically accomplished by incorporating a capacitor at the ECU’s input. Given that voltage to the ECU also experiences drops during transmission of detection signals by the battery monitoring IC, the capacitor configuration must furnish the ECU with adequate time to conduct a secure reset even during such instances.

The battery monitoring IC finds versatile application examples, including voltage detection for automotive batteries, ensuring their safe and efficient operation. Moreover, by optimising their performance, the IC proves beneficial for various critical automotive components such as engines, transmissions, suspensions, and ABS. Additionally, its significance extends to Electric Vehicles (EVs), Hybrid Electric Vehicles (HEVs), and Plug-in Hybrid Electric Vehicles (PHEVs), where it plays a pivotal role in monitoring battery voltages, contributing to the overall operational integrity and safety of these vehicles.

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The company claims that the ICs have a compact design with an ultra-compact automotive package, reducing its footprint by approximately 20% compared to previous models. The voltage detection response time has been significantly improved, enhancing its suitability for demanding environments. They operate with low current consumption, ensuring continuous battery monitoring. The wide-rated voltage range of the monitoring voltage input pin (-30V to 45V) eliminates the need for conventional dividing resistors that typically lead to higher standby currents. This advancement, combined with reduced capacitors and smaller package sizes, results in substantial space savings in automotive applications. The Series finds utility in automotive battery voltage detection, Battery Management Systems (BMS), onboard chargers, and DC/DC converters.

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