Recently, Texas Instruments released the industry's first high-side smart power switch with programmable current limit. As automotive systems become more complex, multiple loads within the system will require different system configurations during operation. By using TI's latest TPS1H100-Q1, designers can drive highly reliable loads with highly flexible drives such as automotive powertrains, body electronics safety and driver information systems. load. Compared to competing products, the TPS1H100-Q1 increases current sensing accuracy by 20%, enabling the intelligent and real-time diagnostics required for the load conditions it is under. System designers can take advantage of the simplicity and flexibility of the device to improve the system while reducing the complexity of the circuit.
Automotive Body Control Module (BCM) drive
Schematic/block diagram
Key features and benefits of the TPS1H100-Q1:
High current sensing accuracy: 5mA current sensing accuracy allows designers to take advantage of precision load checking to adjust drive system configuration, diagnose system faults, lock problem areas, or determine circuit conditions.
Programmable Current Limit: The TPS1H100-Q1 is the industry's first device to achieve flexible control through adjustable current limit.
High avalanche energy dispersion function: The high voltage avalanche structure can solve the voltage surge problem caused by the inductive load Zener transient voltage recirculation without a suppressor and freewheeling diode.
Test Data
Compliance with the Automotive Electronics Council (AEC) Q100-012 Class A standard: Zero failure in automotive and industrial environments to ensure product reliability over the life of the product. TI's library of load switches can be used in a variety of applications including power saving, power distribution and power sequencing. These highly integrated devices streamline the number of peripherals (BOM), reducing solution size while adding additional protection features.
The automotive BCM reference design addresses common design challenges such as load drive, condition diagnostics, and fault detection. This reference design in TI Designs helps designers quickly design door locks, window lifters, seat heaters, heating, ventilation and air conditioning (HVAC), lights and light-emitting diodes (LEDs). TIDA-00296 is a reference design that focuses on TI's portfolio of high-side and low-side relays, motors, and load drivers. We selected loads for this design (door locks, window lift motors, seat heaters, HVAC, lights, and LEDs) to demonstrate the range of loads that BCM can drive and how TI solutions can meet these areas.
Design PCB board
Flexible and reliable driver products for driving multiple loads, intelligent drivers provide diagnostics and protection through I2C and SPI; reverse polarity protection for the power stage of the design; front FET drivers for driving discrete FETs, so Designed to handle load drive requirements flexibly; highlights the ability of BCM to directly drive loads with higher current demands (~4500mA).
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