MIC4100BM

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The MIC4100BM PMIC is a dual-channel MOSFET driver usually used as a high voltage power module gate driver. It is designed to provide fast, robust and efficient drive of the gate terminal for discrete MOSFETs and IGBTs. This driver serves as a bridge between a high voltage control system, such as a microcontroller, and the power switch.

In principle, to effectively drive the MOSFET power switches a microcontroller or signal processor must provide a signal at certain voltage level based on the desired switching activity, these signal levels can vary from microvolts to high current millivolts. With limited signal swing capability, the microcontroller or signal processor might not be able to control the voltage level of power switches directly, thus requiring a gate driver. The gate driver will then serve as an intermediary between the microcontroller and the power switch, taking the incoming digital control signals and converting them into the appropriate voltage and current levels in order to effectively switch the power switch.

The MIC4100BM PMIC is designed to address these challenges by providing low propagation delay, robust switching, thermal protection, and immunity from DC-input ripple. This device utilizes two power MOSFET channels to make the gate drive operation on JFETs, MOSFETs, and IGBTs simpler. The power MOSFET channels use a dedicated control signal for each channel, and feature a low propagation delay of 10 ns, making them well suited for high speed switching applications.

The MIC4100BM PMIC is used in applications such as motor control, power factor correction, MOSFET power switch controllers, high side switches, and brushless DC (BLDC) motor control. This driver is a popular choice for high power applications like commercial power supplies, automotive powertrains, switching power supplies, and solar inverters. With its ability to drive large MOSFETs and IGBTs, this driver offers an excellent solution for applications requiring high power density, high efficiency, and high temperature tolerance.

The MIC4100BM PMIC utilizes a charge pump technology which provides an output voltage of up to 40V and steers the gate voltage when the load current changes. This ensures that the load is not shut down due to a voltage drop or an excessive voltage increase, allowing the device to be used in harsh operating conditions such as automotive applications. Additionally, this device features an adjustable slew rate which helps to minimize unnecessary power dissipation during switching and reduce EMI.

The MIC4100BM PMIC offers a range of features to make it an ideal solution for high voltage power module gate driver applications. In summary, the features of this device include:

• Dual-channel MOSFET Driver
• Low Propagation Delay: 10 ns
• Charge Pump Technology for Output Voltage up to 40V
• Adjustable Slew rate
• Thermal Protection
• Immunity from DC-Input Ripple

In conclusion, the MIC4100BM PMIC is an ideal gate driver for high voltage power module applications. With its low propagation delay and adjustable slew rate, it is able to deliver fast and robust switching, while also providing thermal protection and immunity from DC-input ripple. Additionally, its charge pump technology enables it to steer the gate voltage when the load current changes, making it suitable for a number of demanding applications. The MIC4100BM PMIC is therefore an ideal choice for applications such as motor control, power factor correction, and BLDC motor control.

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