LM5100SD/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power management integrated circuits (PMICs) are used to control, regulate and monitor the power used in a variety of applications, from digital devices to computers. Gate drivers are essential for controlling power devices such as MOSFETs and IGBTs. The LM5100SD/NOPB is a high-performance full-bridge gate driver for controlling a broad range of power devices including MOSFETs, IGBTs, and bipolar transistors. This application note provides an overview of the LM5100SD/NOPB application field and its working principle.

Application Field

The LM5100SD/NOPB is well-suited for applications requiring full-bridge control such as motor drives, DC-DC converters, and solar energy systems. The LM5100SD/NOPB allows for two different modes of operation: Pulse Width Modulation (PWM) and Three-Phase PWM mode for inverter applications. It accepts 15V–50V operating voltage and can provide up to 2A of output current for driving power devices. The LM5100SD/NOPB also features integrated error-amplifier and logic comparators, allowing it to directly interface with sensing components and onboard microcontroller.

Working Principle

The LM5100SD/NOPB has three power inputs: a supply input, VCC, and two high-side drive inputs, ENL and ENH. When the ENH and ENL inputs are applied logic high and logic low, respectively, a logic-level signal is sent to the main power output pins. Current is then supplied to the power device in order to turn it on. The high side of the device is driven by the high-side control inputs, ENL and ENH, while the low side is turned on through the low-side gate control input. The VCC input powers the internal logic and provides high-side and low-side gate drive for both MOSFETs and IGBTs. In addition, the LM5100SD/NOPB features protection features such as over-temperature protection and overcurrent protection.

The LM5100SD/NOPB also features adjustable dead time, diagnostics, shoot-through protection, adjustable gate precharge current, and low jitter operation. This gate driver provides a short turn-on delay time which allows for a fast response time. The adjustable dead time control feature allows the user to adjust the dead time needed for their application, providing superior flexibility and control.

The diagnostics feature provides a programmable open and short circuit detection feature that allows the user to monitor the real-time status of the device and power devices. The open and short circuit detection feature works by monitoring the voltage at the gate of the power device, detecting any abnormalities and providing a signal to the microcontroller. The shoot-through protection feature prevents the simultaneous conduction of both MOSFETs and IGBTs, preventing damage to the power system.

The adjustable gate precharge current feature adjusts the gate precharge current according to the application requirements which improves system performance by reducing power loss and efficiency. The low jitter operation feature ensures that the switching waveforms are smooth with minimal ripple and jitter, resulting in a lower level of high-frequency emissions.

Conclusion

The LM5100SD/NOPB is a high-performance full-bridge gate driver designed for use in applications such as motor drives, DC-DC converters and solar energy systems. It features adjustable dead-time, diagnostics, shoot-through protection, adjustable gate precharge current and low jitter operation. The LM5100SD/NOPB is an ideal gate driver for driving power devices such as MOSFETs and IGBTs that require high accuracy and low switching noise.

The specific data is subject to PDF, and the above content is for reference