LM5111-2MY/NOPB

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PMIC - Gate Drivers

The LM5111-2MY/NOPB is an advanced gate driver integrated circuit (IC) designed for driving power MOSFETs and IGBTs in high side, low side and half-bridge configurations. The device offers an ASSP (application-specific standard product) solution to the complex challenges inherent in power switching topologies. This IC is designed to support a wide range of gate voltages, gate characteristics, and gate rise/fall times.

Features

The LM5111-2MY/NOPB has a few key features that make it an ideal gate drive IC:

• Programmable dead time that helps minimize shoot-through currents, as well as shoot-through voltage spikes
• Adaptive, programmable blanking time that enables optimal gate driver performance and flexibility
• An integrated Charge Pump with adjustable charge/discharge slew rates to optimize performance
• Adjustable switching times for both high-side and low-side outputs to minimize EMI issues

Working principle

The LM5111-2MY/NOPB operates on a 3.3V to 32V input voltage range, and can be easily configured with external circuitry. The dead time is programmable using two comparator inputs, as well as two independent PWM inputs, allowing for many different setups. The adaptive blanking time and charge pump slew rate can also be configured.

When an input is received, the LM5111-2MY/NOPB powers up the P-channel MOSFET and charges the gate capacitance. When the voltage at the gate reaches its threshold, the MOSFET turns on. At this point, a timer is triggered and the device starts to discharge the gate capacitance. When the gate voltage falls below its threshold, the MOSFET turns off. This cycle is then repeated for the remaining MOSFETs.

Applications

The LM5111-2MY/NOPB is well suited for a wide range of power applications. It is used in switched-mode power supplies, high-efficiency DC/DC converters, automotive systems, LED lighting and other power management applications. It is an ideal device for eliminating the need for external gate drives and simplifying designs.

The LM5111-2MY/NOPB is an excellent choice for power applications that require advanced gate drive techniques. The adaptive blanking time helps minimize EMI issues and shoot-through currents, while the Charge Pump simplifies the implementation of efficient power supply designs.

The LM5111-2MY/NOPB is an advanced gate driver IC that offers an ideal solution to complex power switching challenges. The device is well suited for a range of applications and can simplify designs while helping improve power efficiency.

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