AON6522 Discrete Semiconductor Products

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AON6522 is an advanced self-powered low voltage over voltage protection (UVP) integrated circuit from Alpha and Omega semiconductor (AON). It is designed for controlling the supply voltage of memories and other over voltage sensitive devices in battery powered applications. The AON6522 is mainly used for mobile products since it can adjust the power supply voltage according to the battery voltage. The AON6522 offers several advantages over other protection circuits, including low quiescent current, high protection undervoltage limit accuracy, and low standby current.

AON6522 is a monolithic CMOS device which includes two MosFET power switches, an overvoltage protection circuitry, an overcurrent protection circuitry, a current limit circuitry and a voltage reference generator. It requires a minimum of external components, allowing it to be used in very small form factors.

The main feature of this device is the overvoltage protection (UVP) circuit. This circuit uses threshold detection logic and constantly monitors the VCC voltage level. If the voltage exceeds a predetermined threshold level, the overvoltage protection circuit shuts down the supply voltage. The UVP threshold voltage of the AON6522 can be set by a single external resistor, allowing the device to be used in applications with different power supply levels.

The over current protection circuit monitors the current usage of the device while it is in operation. If the current exceeds a certain level, the over current protection circuit will shut down the supply voltage. This is especially useful in applications where the current draw can quickly increase due to sudden changes in the load.

The AON6522 also offers a current limit circuit which provides additional protection against excessive current usage. The current limit circuit monitors the current consumption of the device and will trip the shut down switch if the current consumption exceeds a certain level. This is especially useful in applications where the current consumption can quickly increase due to sudden changes in the load.

The AON6522 also features a voltage reference generator which provides a stable voltage reference for the integrated circuits on the board. This is especially useful for controlling voltage levels in battery powered applications. This feature helps the device save power by preventing the device from operating at higher than necessary supply voltages.

In summary, the AON6522 can be used in a wide range of battery-powered applications that require over voltage protection, overcurrent protection and current limit protection. Its low quiescent current, high protection undervoltage limit accuracy and low standby current makes it an ideal choice for mobile products. The voltage reference generator allows the device to save power without sacrificing reliability. Finally, it requires a minimum number of external components, making it suitable for use in small form factors.

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