MIC4469CN

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PMIC - Gate Drivers are specialized integrated chips which are designed to drive high-current power MOSFET and IGBT componets. MIC4469CN is an innovative gate driver PMIC designed by Micrel Inc. It is ideal for driving IGBTs and power MOSFETs for motor control, appliance and power conversion applications.

MIC4469CN Features

• High power MOSFET gate drive capability
• Wide operating voltage: 5 V~14.5 V
• Integrated bootstrap diode
• Integrated high speed gate drive transistor
• Designed to run in PWM and PFM mode
• Low profile SOP-8 Package
• Low power consumption
• Wide operating temperature range

MIC4469CN Application Field

MIC4469CN has many application fields. It can be used in motor control, including electric vehicles, industrial robotics, air conditioners, office, home appliance and power conversion applications. It can also be used for LED lighting or white-goods application. Additionally, this integrated device can be used for power supplies, pulsed applications, sensors, automotive load switches and DC-DC converters.

MIC4469CN Working Principle

MIC4469CN consists of a high-current gate driver, an undervoltage lockout (UVLO) circuit, and an integrated bootstrap diode. The device is designed to drive external IGBTs and MOSFETs used in motor control and power conversion applications. It has wide operating voltage range up to 14.5 V and enables robust protection while featuring decreased power consumption. Moreover, it has a low profile SOP-8 package with an advanced die attach technology for better thermal dissipation.

The UVLO circuit keeps the device from turning on until the power supply voltage rises above the threshold voltage. The device is designed to run either in PWM or PFM mode for low current consumption and high efficiency. The device also has an integrated bootstrap diode which allows for easy driving of the high-voltage gate drive for IGBTs. This device has an internal FET driver which offers low RDSON and high peak current capability for faster switching of the external FET.

The MIC4469CN has integrated safety features that protect it from electrical overstress (EOS), short-circuit, and thermal overload conditions. The device features an adjustable EOS threshold that enables it to protect itself in the event of an EOS event. Additionally, it has an adjustable over temperature protection (OTP) that will protect the device in the event of a thermal overload condition. It also has integrated short-circuit protection which ensures the device will not be damaged in the event of an output short circuit.

Conclusion

The MIC4469CN is an innovative gate driver PMIC that is ideally suited for motor control, appliance and power conversion applications. It has wide operating voltage range, integrated safety features, and low power consumption. Additionally, it offers robust protection and integrated bootstrap diode for easier driving of the high-voltage gate drive for IGBTs. These features make the MIC4469CN a great choice for various applications.

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