MC33886DH

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Power management integrated circuits (PMIC) are electronic devices used to provide the power required for electronic equipment. They contain features including voltage and current regulation, sequencing, power-on reset generation, voltage monitoring and more. A popular PMIC is the MC33886DH, a full bridge motor driver providing high output current and a wide variety of control functions in a small package. In this article, we will cover the applications of MC33886DH and its working principle.

MC33886DH Application

The MC33886DH is a dual high-side full bridge driver operating at 26V with 1A per channel. It is designed to drive brushed and brushless DC motors, fans, pumps, solenoids and other actuators. It is also suitable for powering single-cell battery applications in industrial and automotive applications. The device is highly suitable for board mounted motion control power supply.

The overall package size is low, occupying only 0.66mm2 of board area. Other features of the package include a low 1.6V operating voltage and low RDS(ON) of 0.18ohm, making it suitable for portable applications. It features integrated tachometer feedback, high PWM frequency range, variable hysteretic current limit protection, variable over-temperature protection and overvoltage protection. The MC33886DH is also suitable for driving a range of LEDs.

MC33886DH Working Principle

The MC33886DH is a full bridge motor driver, meaning it controls the movement of a motor by electrically reversing the motor current. A motor requires two power signals 180° out of phase to operate. The MC33886DH converts a single input signal into two opposite polarized signals, that can be used to power the motor. The single input signal is typically driven by a pulse-width modulation (PWM) signal, that is sent to the driver. The driver then creates two complimentary signals with the same pulse width, but 0° and 180° out of phase.

The MC33886DH also features several protection features to ensure proper operation and safety. These features include over-temperature and overvoltage protection, as well as an integrated tachometer feedback for system monitoring. In addition, the driver features a low standby current and low quiescent current, making it more energy efficient than its competitors.

Conclusion

The MC33886DH is a high-current, full bridge motor driver designed to drive DC motors, fans, pumps, solenoids and other actuators. It features a low package size and can operate at low voltages and currents, making it suitable for portable applications. Additionally, the MC33886DH features several protection features to ensure proper operation and safety.

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