XC6121D331ER-G

The XC6121D331ER-G is classified as a PMIC - Supervisors. This is a power management integrated circuit (PMIC) with integrated supervisors. It offers low power consumption, high accuracy and high input impedance, making it suitable for applications with high accuracy and low power consumption requirements, or in environments that require high input impedance and robust protection capability.

Applications

The XC6121D331ER-G is used for embedded electronic devices and systems in applications such as mobile phones, mobile devices, personal digital assistants (PDAs), automotive, industrial automation and medical devices, among others. It provides voltage monitoring, input/output short-circuit protection and current and temperature supervision.

The XC6121D331ER-G is also used in battery management systems (BMS) or backup power supply systems. In BMSs, this PMIC provides accurate safety-critical protections to ensure safe operation of batteries. It offers overvoltage, undervoltage, over-temperature, over-current and CRT (charge, current, and temperature) protections. In backup power supply systems, the XC6121D331ER-G ensures uninterrupted power to the load. It is capable of taking over the main power source when the input voltage is lower than the preset voltage, and automatically resumes the main power supply when it is normal.

Working Principle

The XC6121D331ER-G PMIC is capable of monitoring voltage, current and temperature. The voltage monitoring function is implemented by an internal voltage reference and a comparator circuit. The voltage reference is set by an external voltage divider circuit, and the comparator circuit compares it against the input voltage. The input voltage must exceed the target voltage for proper operation. If the input voltage is lower, the supervisor output is pulled low, regulating the power supply and protecting the system.

The current monitoring function is implemented using an external shunt resistor to convert the current into voltage, which is compared against the internal reference voltage. If the voltage across the shunt resistor is higher than the reference voltage, the supervisor output is pulled low, indicating that the current has exceeded the set limit.

The temperature monitoring function is implemented using an internal sensor (NTC thermistor) or an external thermal diode. The internal sensor is capable of detecting temperature up to 100°C, and the external thermal diode is capable of detecting temperatures up to 125°C. If the temperature exceeds the set limit, the supervisor output is pulled low, providing an indication that the system is overheating.

The XC6121D331ER-G PMIC also includes short circuit protection and timer functions. The short-circuit protection is implemented by a maximum peak current limit, which limits the current. The timer function can be used to generate a time-out signal, preventing any overload problems. It can be used for power-on reset purposes or for setting the time between valid power-up states.

Conclusion

The XC6121D331ER-G PMIC is a perfect solution for managing voltage, current and temperature in a wide range of embedded applications. It offers low power consumption, high accuracy and high input impedance, making it suitable for high accuracy and low power consumption requirements, or in environments that require high input impedance and robust protection capability. With its integrated supervisors, this device can provide voltage monitoring, input/output short-circuit protection and current and temperature supervision. It is also used in battery management systems and backup power supply systems.