ST SR5E1 22KW OBC & 3KW DC DC Combo System 2-in-1 car charger solution
Electric cars generally have two batteries with different voltage levels. The high-voltage battery is used to drive the motor, and the low-voltage battery is used to power the electronic equipment in the car. Two A DCDC converter is needed between batteries to realize the flow of power. According to the needs of the OEM, the power direction can be unidirectional or bidirectional.
Since it works while driving, the functional safety level of DCDC is generally above ASIL-C.
In the evolution of vehicle electrification, on-board chargers (OBCs) have always played an important role.
The main function of the vehicle-mounted OBC is to convert alternating current into direct current to charge the main battery pack of the electric vehicle. Usually the power level ranges from 3.3KW to 22KW. Now OBC also has a V2L inverter function to meet outdoor emergency power needs.
STMicroelectronics has launched system solutions for high-power OBC+DCDC applications and end customers’ needs for faster charging.
The solution mainly consists of 40nm process, 32-bit Arm® architecture automotive-grade multi-core microprocessor Stellar-E1, power management/system basic chips L9396, L978S, A6983L, single-channel gate isolation driver STGAP2SICS, and third-generation power semiconductors It is composed of 1200V SiC power devices SCT015W120G3-4AG, SCT025W120G3-4AG, and SCT070W120G3-4AG. This solution provides customers with complete supporting products to meet their high-power OBC+DCDC application needs.
STMicroelectronics' Stellar E automotive MCUs are optimized for electric vehicles and automotive centralized (region/area) electrical architectures, combining advanced electronics with efficiency and innovation to perform high-speed control loop processing and general-purpose control on the same chip. Computing, using the integrated high-speed analog-to-digital converter (ADC), high-precision pulse width modulation (PWM) controller and fast-action protection circuit on-chip, only one MCU can control the entire power module, simplifying the power module design and streamlining The bill of materials facilitates the transition of power modules to efficient SiC-based solutions, enabling longer driving range and faster charging.
Stellar E MCUs support advanced automotive functional safety standards (ISO 26262 ASIL-D), data security functions (HSM) and industry-standard software interoperability (Autosar) with built-in, efficient and secure over-the-air (OTA) reprogramming that can Continuously optimize performance and upgrade vehicle functions after sales.
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