LM5101MX/NOPB

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The LM5101MX/NOPB is a gate driver from Texas Instruments’ family of Intelligent Power Modules (IPM). This device is engineered to provide the interface between a controller or microcontroller, and high current power devices such as IGBTs, to reduce design risk and improve efficiency in a range of applications such as industrial motor drives, renewable energy, automotive, lighting and consumer products.

Applications

The LM5101MX/NOPB gate driver offers design flexibility and helps reduce the time-to-market. It offers several features and benefits, including:

• Flexible gate control
• Low power dissipation
• Internal over-current protection
• Built-in bootstrap diode protection
• Supports negative and positive gate excitation
• Integrated shoot-through protection

The LM5101MX/NOPB is suitable for a variety of applications, such as industrial motor drives, an inverter for pumps or fans, renewable energy, and automotive, lighting, and consumer products. It is also used in home appliances, such as televisions and refrigerators.

Working Principle

The LM5101MX/NOPB is a 3-phase gate driver that uses a high-side/low-side topology. It consists of three half-bridge gate drivers, each of which is capable of driving two high-side and two low-side switches, making it suitable for three-phase motor drives applications. Each half-bridge gate driver consists of a high-side gate driver, a low-side gate driver, and a gate control logic block.

The high-side gate driver provides a gate voltage to the high-side switch, while the low-side gate driver provides a gate voltage to the low-side switch. The gate control logic block controls the voltage of the two drivers by providing a low impedance drive, precise current limit settings, and over-current protection.

In addition, the LM5101MX/NOPB has an integrated, programmable, shoot-through protection system. This system helps prevent current spikes that could damage the power devices by preventing both the low and high side switches from conducting at the same time.

The LM5101MX/NOPB also has a built-in bootstrap protection feature, which prevents damage from unexpected voltage levels. It also includes integrated over-current protection to further protect the power switches and gate driver from over-current conditions.

The LM5101MX/NOPB gate driver is powered by an external supply voltage, typically 4.5V to 5.5V. The device features flexible gate control, a wide operating temperature range, low power dissipation and an adjustable over-current protection setting. It also has a robust input/output protection system and is EMI/EMC compliance.

The LM5101MX/NOPB is a versatile and sophisticated gate driver that offers designers the capability to tailor their designs to their specific applications, while providing reliable and robust performance.

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