NCV33161ADR2G

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The NCV33161ADR2G is an advanced protection and supervisor circuit integrated with a miniature size. This high precision device is designed for use in portable and battery powered devices where space is a major constraint. The NCV33161ADR2G is an active low supply on/off switch with adjustable delay time. Its structure makes it an ideal choice for applications that require reliable protection from faulty supply voltages. This device also features an adjustable precision voltage detection and an adjustable logic output voltage.

The NCV33161ADR2G belongs to the category of PMIC - Supervisors, where it is primarily used to provide overvoltage, undervoltage and overcurrent protection. This device includes three different channels, one input channel and two output channels, making it useful for applications with multiple power supplies. In addition to overvoltage, undervoltage and overcurrent protection, the NCV33161ADR2G also includes brown-in, brown-out and power-on reset protection.

The working principle of NCV33161ADR2G involves the use of multiple circuits integrated together to provide protection. The first circuit is a voltage detection circuit, which consists of two resistors and two comparators. This circuit detects the input voltage and compares it to two reference voltages, VREF_LOW and VREF_HIGH. When the input voltage is greater than the VREF_HIGH reference voltage, the voltage detection circuit will activate the active low supply override switch to turn off the power supply. Likewise, when the input voltage is lower than the VREF_LOW reference, the active low supply override switch will be activated to prevent the power supply from being switched on.

The second circuit is the adjustable delay time circuit that controls the delay time between the input voltage exceeding the VREF_HIGH threshold and the active low supply override switch turning off the power supply. This adjustable delay circuit is implemented with an RC low pass filter using an adjustable resistor and capacitor. This adjustable delay can be used to protect the equipment during a power-on rush current and/or a power-off surge current.

The third circuit is the adjustable precision voltage detection circuit. This circuit includes two comparators and one adjustable reference voltage. The adjustable reference voltage can be increased or decreased using an external resistor or potentiometer. This adjustable reference voltage is used to detect any deviation from the predetermined value of the power supply voltage, which allows for instantaneous shutdown of the equipment in case of a power supply failure.

The fourth circuit is the adjustable logic output voltage circuit. This circuit uses an adjustable reference voltage and an amplifier to output a precise voltage. This precise voltage can be used to inform external devices of the power supply status. For example, this precise voltage can be sent to an external device to signal the power on or power off status.

In summary, the NCV33161ADR2G is an high precision device that is ideal for use in portable and battery powered devices where space is a major constraint. It belongs to the PMIC - supervisors category and it is used to provide overvoltage, undervoltage and overcurrent protection. Its structure includes four different circuits, such as the voltage detection circuit, adjustable delay time circuit, adjustable precision voltage detection and adjustable logic output voltage. With these functions at its disposal, the NCV33161ADR2G is a great choice for reliable power supply protection.

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