MIC4128YME-TR

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Power semiconductors are increasingly being chosen over traditional control devices due to their enhanced reliability, greater efficiency, and the ability to provide more precise control. In order to drive this power-intensive devices, gate drivers are often used.

A gate driver is a device that shares the switching function between the control circuit and the power device. Gate drivers use minimal power to efficiently alternately charge and discharge the gate capacitance of a power device, usually a MOSFET or IGBT. This sends a high current charge/discharge signal to the gate electrode of a target power device, controlling its switching on or off. As a result, the power device is able to quickly charge or discharge its drain or source voltage at high frequencies.

The MIC4128YME-TR is a monolithic gate driver from Microchip Technology. It is a cost-effective, low-power solution that provides precise, high-speed control and protection of power MOSFETs and IGBTs. The device is equipped with two independent gate driver channels, each of which has two high-side and two low-side power MOSFET/IGBT outputs.

The MIC4128YME-TR also integrates a pulse-by-pulse current limiting feature, adjustable under/over voltage protection, and a pre-biased start-up feature that eliminates the need for choke coils. This prevents from overdriving power MOSFETs/IGBTs and simplifies peripheral circuitry.

The MIC4128YME-TR can drive a wide range of applications, including motor drives, telecom, renewable energy, lighting, automation, home appliances, HVAC and others. It can be used to power systems that operate at up to 30V, supporting output current of up to 5A/channel. Power semiconductors driven by the MIC4128YME-TR can switch at frequencies up to 500kHz.

The MIC4128YME-TR works by sourcing a high voltage charge to the gate electrode of a power device to turn it on and sinking the same voltage to turn it off. To achieve this, the MOSFET/IGBT gate is connected to the waveform generator internal to the IC, and a PWM signal is sent to the waveform generator to control the gate charge/discharge waveform. The waveform generator output is able to precisely control both the Output Update Time (tOUT) and the Output Hold-Off Time (tHOLD), allowing the user to fine tune the switching of the power devices.

The MIC4128YME-TR also features several protective functions. The device is designed to protect against low or high input and output voltages. It also includes short circuit protection and over-temperature protection. This ensures reliable and safe operation, even under extreme conditions.

In conclusion, the MIC4128YME-TR is a powerful gate driver that provides high-speed control and protection of power MOSFETs/IGBTs. Its low power consumption, versatility and protection features make it an ideal choice for various applications.

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