MAX802MCPA+

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Power management integrated circuits (PMICs) are used in a wide range of applications, from battery charging to voltage management and delivery. Supervisors are a type of PMIC that monitors voltage in a circuit, checks for irregular or dangerous conditions, and shuts off power or sends an alert to a microcontroller if necessary. One example of a supervisor is the MAX802MCPA+. This article will discuss the application field and working principle of this device.

Application Field

The MAX802MCPA+ is a voltage supervisor to protect systems from unanticipated voltage disturbances. It monitors two voltage inputs – one to detect overvoltage and the other to detect undervoltage – and provides a power-system reset signal if either is true. It is designed to protect motor control and automotive power supplies. It can be used in power modes ranging from 3V up to 38V, depending on the configuration.

Working Principle

The MAX802MCPA+ contains two comparators: one to detect overvoltage and the other to detect undervoltage. The input voltage is compared against two references, V_OV and V_UV, which can be set by the user. V_OV and V_UV are adjustable and offer protection thresholds on either side. These thresholds can be set via resistors connected to user-configurable input pins. If either voltage exceeds the configured thresholds, the corresponding comparator will activate, alerting the system.

The MAX802MCPA+ also contains a reset timer that provides a minimum reset time. This prevents false reset signals from appearing due to momentary voltage fluctuations. The reset timer can be configured to ignore voltage disturbances that are shorter than the set time.

The MAX802MCPA+ is a versatile device for protecting systems from unanticipated voltage disturbances. It monitors two voltage inputs and provides a power-system reset signal if either is true. With its adjustable thresholds, adjustable reset time, and wide operating range, the MAX802MCPA+ is well-suited for applications such as motor control and automotive power supplies.

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