MIC3809BMM-TR

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• MIC3809BMM-TR Application Field and Working Principle

  The MIC3809BMM-TR is a pulse width modulation (PWM) controller designed to regulate and control both step-up and step-down voltage regulators. It is primarily used in automotive, audio, networking, industrial and medical applications. The device has two high side switching outputs, and one low side switch output, all supported by integrated drivers, intended to improve the efficiency of the regulator and reduce the number of external components.

• Features

  Some of the many features the MIC3809BMM-TR provides are: transient response compensation, protection against short circuit, under voltage and over voltage threshold conditions, minimum on-time control, adjustable pulse frequency, adjustable soft start, and adjustable current limiter.

  The MIC3809BMM-TR also has several programmable user selectable options. When programming the device, the user can select a single or dual pulse mode, ramp profiler, fault report family, internal oscillator frequency and soft start ramp rate. All of these features can be modified to the user’s specific needs, and will help to increase the efficiency and stability of the circuit.

• Working Principle

  The working principle of the MIC3809BMM-TR is based on the current difference control (CDC) method. This method uses an internal peak current feedback loop to regulate and control the output voltage. It is also capable of regulate up to five different output voltages in single output applications. The peak current feedback loop operates in parallel to the active voltage loop, allowing the device to both accurately regulate voltage while maintaining stable current.

  In addition, the MIC3809BM-TR also has an internal temperature protection circuit to protect against high temperature operation. The device will automatically shut down if the temperature becomes too high. This can prevent many types of damage to the device itself and its surrounding components.

• Conclusion

  In conclusion, the MIC3809BMM-TR is a reliable and efficient pulse width modulation (PWM) controller. It offers many features, such as transient response compensation, minimum on-time control, adjustable pulse frequency and adjustable soft start, which make it ideal for automotive, audio, networking, industrial and medical applications. It also has an internal peak current feedback loop that uses the current difference control (CDC) method to accurately regulate voltage, making it perfect for applications that need high stability. Finally, it has an internal temperature protection circuit to protect against high temperature operation and protect against damage.

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