NCV33161DMR2G

PMIC - Supervisors are ICs that help monitor and control the power supply of on-board systems and devices. The NCV33161DMR2G is a monolithic, fixed-frequency, synchronous, current-mode, step-down regulator control IC with a maximum output current of 1.5A and a wide input voltage range of 2.9V to 15V. The supervisor is used to monitor power input parameters such as over-voltage, under-voltage, output over-current, short-circuit, and thermal shutdown. In addition, the supervisor can provide reset or interrupt signals as a failsafe protection.

The NCV33161DMR2G has a wide range of applications, such as automotive battery management systems, automotive body electronics, industrial/commercial power supplies and systems, battery chargers, off-line/isolated switching power supplies, system power supply designs, and portable powered devices. The IC also meets all modern system requirements due to its high efficiency, low external component count and small form factor.

In terms of performance, the NCV33161DMR2G comes with an adjustable switching frequency from 200kHz to 500kHz with low start-up current and zero-current detection technology. The device also features a precise short-circuit protection and a soft-start function to prevent overshoot/undershoot and in rush current issue. Moreover, the supervisor has an adjustable synchronous rectification output for improved efficiency and peak current optimization under light load conditions.

The working principle of the NCV33161DMR2G is based on its patented current-mode control loop. The internal block diagram of the IC includes an error amplifier, a saw-wave oscillator, a reset/interrupt comparator, a voltage reference, and a gate driver. This block diagram allows the IC to perform protection functions, such as over-voltage, under-voltage, output over-current, short-circuit, and thermal shutdown.

The saw-wave oscillator generates a saw-wave signal, while the error amplifier compares the output voltage to the voltage reference. The output of the amplifier is used by a comparator to decide the logic level and provide output reset/interrupt signals. This enables the IC to regulate the output voltage according to the set regulation limit, thereby providing a safe and balanced power supply.

In conclusion, the NCV33161DMR2G is a feature-rich, monolithic, fixed-frequency, synchronous, current-mode, step-down regulator control IC with a range of protection functions, an adjustable switching frequency, low start-up current, zero-current detection technology, a soft-start function, an adjustable synchronous rectification output, and a precise short-circuit protection. The supervisor is suitable for a wide range of applications, such as automotive, industrial/commercial, and portable powered devices.