MCZ33291LEGR2

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The MCZ33291LEGR2 from On Semi is a power distribution switch, load driver, and mobile LED driver. It is suitable for use in automotive, mobile, and industrial applications. This device is designed to provide reliable power distribution and load switching with low current dissipation and fast rise/fall times. It provides four power channels with up to 5.5 V output voltage, a wide input voltage range of 4.5 V–20 V, and support for up to 1.2 A per channel. Additionally, it features overcurrent protection, thermal shutdown protection, and short-circuit protection.

The MCZ33291LEGR2 contains four independent power switching channels - enabled by a single control signal - which can be used to drive LEDs, powering low-voltage loads such as sensors, and providing power isolation for analog circuits. With a low on-state resistance (RDSon) of 70 mΩ it ensures minimal power losses and a fast switching response time with a frequency of 1 MHz. The device also has a high output current capability of 1.2 A per channel, allowing it to drive up to four LEDs in parallel.

The MCZ33291LEGR2 also offers a diagnostic feature that allows for the detection of open, short, or resistive faults on any of the four channels. This feature can be used to autonomously disable any malfunctioning channel and can be used to detect in-circuit conditions such as polarity reversal or ESD damage. Additionally, the device features external output pin connections which can be used to generate an external fault indicator.

The MCZ33291LEGR2 also features a built-in thermal protection circuit which monitors the chip temperature and will shut down the device if an over-temperature condition is detected. Additionally, the device supports an overcurrent protection circuit which reduces inrush current during power up and protects against short circuit events.

The on-chip power control and diagnosis features of the MCZ33291LEGR2 make it well suited for automotive, mobile, and industrial applications. It is capable of providing reliable power distribution and efficient load switching with minimal current dissipation. The fault detect and programmable current limit features provide reliable circuit protection for applications such as LED drivers, sensor power management, and power isolation for analog circuits.

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