AS1901C23

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AS1901C23 is a multi-function device from the AS1901 Series of precision supervisor circuits with high reliability, it offers 4-channel, independent voltage detection and overvoltage protection functions with low supply current. This device is mainly used for system safety protection, and its operating voltage is 2.4V-4.4V. It is a kind of power management integrated circuit(PMIC) that is used to provide steady output voltage supply and protection from overvoltage of device.

AS1901C23 is a multi-functional device that is used frequently in different sectors including industry, automotive and consumer applications. It uses a current compensation technique to avoid the effect of supply current on voltage detection accuracy and improved system performance. AS1901C23 can be used in scenarios such as overvoltage protection for 12V rail in motor control, overvoltage protection for computer system, overvoltage protection for microcontroller and protection from overvoltage in automotive applications.

AS1901C23 consists of two control blocks and two reference voltage blocks. It has three operation modes: voltage detection + OVP, voltage detection + (OVP + UVL), voltage detection only. It uses the current compensation technique to avoid the effect of supply current on the output of voltage detection and protect the system from overvoltage. The control block will enable the OVP (Overvoltage Protection) by detecting the tension at the voltage detection point and comparing it with the reference voltage. When the voltage is detected to exceed the reference voltage, the OVP function will be triggered.

AS1901C23 enables two OVPs. The first OVP is located after the voltage detector. The OVP output will be triggered when the input voltage exceeds the reference voltage. The second OVP is placed after the current compensation loop. It will be triggered when the input voltage exceeds the reference voltage plus the compensation current. This makes the device more reliable and accurate in voltage detection.

Furthermore, the device also has a UVL (Undervoltage Lockout) function. The UVL function is triggered when the input voltage is less than the reference voltage. It will disable the OVP function to prevent false triggering. This ensures the system is activated under the given conditions, while avoiding sudden power up of the system when the voltage suddenly drops.

In conclusion, AS1901C23 is a multi-functional precision supervisor circuits with high reliability, this device is designed to provide overvoltage protection, undervoltage lockout, and voltage detection while providing system safety protection. It is widely used in industry, automotive and consumer applications, which makes it suitable for a wide range of applications.

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