DS1238AS-5+

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PMIC - Supervisors are Specialized integrated circuits which can detect multiple faults. These circuits have been extensively used in embedded systems as well as in mission critical and automotive applications. One of the common PMIC – Supervisor chips is the DS1238AS-5+. This device has numerous application fields and works on a variety of principles. The following sections detail the working principle and application fields of the DS1238AS-5+.

Working Principle

The DS1238AS-5+ is an electronic development board which consists of five different supervisory circuits. The primary device of the board is the DS1238AS-5+. It consists of four basic blocks which are the power monitoring, reset controller, watchdog timer, system supervisor and power up/down sequencer. The DS1238AS-5+ operates using the following five principles:

• Power Monitoring: The DS1238AS-5+ detects overvoltage conditions and shorts on the input power supply as defined by the user. It also maintains a default voltage level.
• Reset Controller: This block monitors the reset pin and provides the logic to deactivate the system if the reset pin fails to provide a low logic level. This helps protect the system from unexpected reset events.
• Watchdog Timer: It ensures that the system will reset in case it runs indefinitely. This is done using the WDT timeout feature that allows the user to set a timeout value for the system.
• System Supervisor: It monitors the system for any unexpected conditions that may cause the system to fail. It takes corrective action based on user-defined thresholds.
• Power Up/Down Sequencer: The DS1238AS-5+ uses this block to sequence the power on/off of the system when the system automatically powers down. This helps prevent any unexpected power loss.

Application Fields

The DS1238AS-5+ is used in a variety of applications, ranging from automotive and electronic systems to medical equipment and peripheral devices. It is used to protect the system from power supply and reset events. Some commonly used application fields include:

• Automotive and Electronic Systems: The DS1238AS-5+ is used in automotive and electronic systems to provide safety and reliable operation. It helps protect the system from unexpected events such as overvoltages, shorts on the input power supply, and unexpected reset events. Additionally, it can detect temperature, voltage, and current overloads.
• Medical Equipment: The DS1238AS-5+ is often used in medical equipment to provide reliable system-level monitoring and protection. It helps ensure the equipment is capable of correctly handling certain events such as overvoltages and shorts on the input power supply.
• Peripheral Devices: The DS1238AS-5+ is also used in peripheral devices, such as printers and controllers. It helps protect these peripheral devices from unexpected power supply and reset events, ensuring reliable and safe operation.

Conclusion

The DS1238AS-5+ is a popular PMIC – Supervisor device used in a variety of applications. It consists of five different supervisory circuits, each providing a different purpose such as power monitoring, reset controller, watchdog timer, system supervisor, and power up/down sequencer. Additionally, it is used in automotive and electronic systems, medical equipment, and peripheral devices.

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