MC33880PEW

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MC33880PEW Application Field and Working Principle

PMIC - Power Distribution Switches, Load Drivers comprise a wide range of integrated circuits designed to simplify the power management and protection of electronic systems. MC33880PEW is one such part that is optimized for driving high-current loads in automotive and industrial applications. This article concentrates on the application field and working principle of the MC33880PEW.

Application Field

The MC33880PEW is suitable for a variety of automotive and industrial applications such as :

• Brushless DC motors and actuators
• Battery-driven dash cameras and GPS devices
• HVAC systems
• Automotive door locks
• Power inverters

This IC is particularly suited for automotive applications due to its wide operating temperature range of -40°C to +125°C. It is also designed to tolerate high voltage spikes, allowing it to survive in harsh automotive environments.

Features

The MC33880PEW provides two enhanced output channels for direct control of high-current loads such as DC motors. The part also features an onboard protection circuit which safeguards the IC from short circuit, overvoltage and over-temperature. Additional features include:

• High-side current sensing
• Charge pump low-side driver
• External bootstrap supply
• Over-temperature shutdown
• Over-voltage shutdown
• Under-voltage lockout
• Programmable maximum output current
• Programmable output voltage
• 2x isolated digital inputs

Working Principle

The MC33880PEW is designed to drive both high-side and low-side loads. To drive the high-side load, an external supply (VBOOT) must be provided. This is used to generate an operating voltage for the charge pump required for the high-side driver. The output voltage is set using external resistors, and the current sensing can be used to provide closed loop current control and protection.

For the low side, the IC provides an active low side driver which switches the load on and off in response to the control signal. This allows the current limit to be adjusted by changing the external resistance value. The low-side driver also benefits from over-current, short-circuit and over-voltage protection.

In addition, the MC33880PEW provides an over-temperature protection circuit which will shut down the IC when the temperature exceeds the threshold. This circuit can be used to protect the IC from overheating in high-temperature environments.

Overall, the MC33880PEW provides a versatile solution for driving high-current loads in automotive and industrial applications. It offers an integrated over-temperature and over-voltage protection circuit, as well as high-side current sensing and a charge pump low-side driver.

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