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TI TPS65381AQDAPRQ1 Multi-rail Power Supply IC For Microcontrollers In Safety Applications

Shenzhen Mingjiada Electronics Co., Ltd. as a leading domestic electronic components distributor, for the majority of customers to provide TI TPS65381AQDAPRQ1 multirail power management ICs, which is designed for safety-critical applications designed for power supply solutions in automotive electronics, industrial control and other fields with a wide range of application prospects.

1，Product Description Of TPS65381AQDAPRQ1

TPS65381AQDAPRQ1 device is a multirail power supply designed to supply microcontrollers (MCUs) in safety-relevant applications, such as those found in automotive and industrial markets. The TPS65381AQDAPRQ1 device supports Hercules™ TMS570 MCU and C2000™ MCU families, and various other MCUs with dual-core lockstep (LS) or loosely-coupled architectures (LC).

TPS65381AQDAPRQ1 device integrates multiple supply rails to power the MCU, controller area network (CAN), or FlexRay, and an external sensor. An asynchronous-buck switch-mode power-supply converter with an internal FET converts the input supply (battery) voltage to a 6-V preregulator output. This 6-V preregulator supplies the other regulators. The TPS65381AQDAPRQ1 device supports wakeup from IGNITION or wakeup from the CAN transceiver.

TPS65381AQDAPRQ1 device includes an adjustable linear-regulator controller, requiring an external FET and resistor divider, that regulates to an adjustable voltage of between 0.8 V and 3.3 V which may be used for the MCU core supply.

TPS65381AQDAPRQ1 device monitors undervoltage and overvoltage on all regulator outputs, battery voltage, and internal supply rails. A second bandgap reference, independent from the main bandgap reference, is used for the undervoltage and overvoltage monitoring, to avoid any drifts in the main bandgap reference from being undetected. In addition, regulator current-limits and temperature protections are implemented.

TPS65381AQDAPRQ1 device has monitoring and protection functions, which include the following: watchdog with trigger and question and answer modes, MCU error-signal monitor, clock monitoring on internal oscillators, self-check on the clock monitor, cyclic redundancy check (CRC) on nonvolatile memory, a diagnostic output pin allowing the MCU to observe internal analog and digital signals of the device, a reset circuit and output pin for the MCU, and an enable drive output to disable the safing-path or external-power stages on detected faults. A built-in self-test (BIST) monitors the device functionality automatically at power-up. A dedicated DIAGNOSTIC state allows the MCU to check TPS65381AQDAPRQ1 monitoring and protection functions.

TPS65381AQDAPRQ1 device is offered in a 32-pin HTSSOP PowerPAD package.

2，Specification Of TPS65381AQDAPRQ1

Input voltage range: 4.5V to 5.8V or 5.8V to 36V wide input range, adapt to a variety of power supply environment

Output Voltage: TPS65381AQDAPRQ1 provides 3.3V to 5V adjustable output to meet different MCU power supply requirements.

Output Current: Up to 1.3A output capability, supporting high current application scenarios.

Integration: TPS65381AQDAPRQ1 has built-in asynchronous step-down switching power supply, linear regulator, charge pump and other multiple power conversion units.

Safety features: multiple protection mechanisms such as under/over voltage monitoring, current limitation, temperature protection and so on.

3，Core Functionality Benefits Of TPS65381AQDAPRQ1

The TPS65381AQDAPRQ1's multi-rail integrated design enables it to simultaneously provide stable and reliable power supplies for the microcontroller core, I/O interfaces, CAN/FlexRay communication modules, and external sensors. The device's integrated 6V pre-regulator supplies power to other regulators, greatly simplifying system power design.

The TPS65381AQDAPRQ1 device is optimised for functional safety applications, with a built-in watchdog timer (supporting trigger and Q&A modes), MCU error signal monitor, clock monitoring and other safety mechanisms. In addition, the device provides advanced features such as cyclic redundancy check (CRC) for non-volatile memory and diagnostic output pins to help the system achieve a higher level of safety integrity.

4，Applications Of TPS65381AQDAPRQ1

Safety Automotive Applications

Power Steering: Electrical Power Steering (EPS) and Electro Hydraulic Power Steering (EHPS)

Braking: Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), and Electric Parking Brake

Advanced Driver Assistance Systems (ADAS)

Suspension

Industrial Safety Applications

Safety Programmable-Logic Controllers (PLCs)

Safety I/O Control Modules

Test and Measurement

Railway and Subway Signal Control and Safety Modules

Elevator and Escalator Safety Control

Wind Turbine Control