LM5100CMAX/NOPB

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The LM5100CMAX/NOPB is a highly integrated power module designed to drive an N-Channel Enhancement-ModeMOSFET or an equivalent gate termination. This integrated power module is applicable in several different circuits including high frequency DC/DC converters, Active ORing converters, high frequency feature switch mode power supplies, and non-isolated buck and boost converters. It significantly simplifies the gate drive circuit by providing a wide variety of features and benefits, such as a fast turn-on time and flexibility that are normally not available with discrete solutions. The LM5100CMAX/NOPB also eliminates the need for external components, further reducing system cost and complexity.

Features of LM5100CMAX/NOPB

The LM5100CMAX/NOPB offers a multitude of features and benefits which facilitate the ease of use when designing a power supply. Its primary features include: 1) Gate Driver/MOSFET Solution, 2) Fast Turn-On Time, 3) Auxiliary Supply Voltage Monitor, 4) Auxiliary Low Saturation Voltage Monitor, 5) Adaptive Gate Drive, 6) Selectable Current Limit, 7) Adjustable Soft-Start and 8) Adjustable Frequency. Each of these features are designed to enable the user to quickly, easily and efficiently design their power supply.

Application Field of LM5100CMAX/NOPB

The LM5100CMAX/NOPB is an ideal power module for a variety of gate drive applications, including high frequency DC/DC converters, active ORing converters, high frequency feature switch mode power supplies and non-isolated buck and boost converters. High frequency DCDCs use a MOSFET based power stage to accommodate high frequency operation of the device and to improve overall efficiency, while active ORing converters use an auxiliary switch MOSFET in order to increase system reliability, which the LM5100CMAX/NOPB can accommodate. The non-isolated buck and boost circuits typically use a MOSFET based power stage to minimize cost and component counts, as well as maintaining high efficiency. Additionally, the LM5100CMAX/NOPB aids in delivering reliable and defensible performance, while simultaneously maximizing efficiency.

Working Principleof LM5100CMAX/NOPB

The LM5100CMAX/NOPB works by taking the input voltage and outputting it to the MOSFET driver, which then provides a pulse-width modulated output voltage to the power MOSFET. This output voltage is then used to drive the MOSFET, resulting in a high frequency, low noise output voltage. Furthermore, the integrated auxiliary voltage and current monitors provide additional protection against excessive current or voltage conditions when the device is in operation.

When the device is first powered up, the adaptive gate drive adjusts the gate drive voltage and current to the load, resulting in faster switching and improved efficiency. Additionally, the integrated soft-start circuit can be programmed to limit the current inrush at the start-up, further reducing the stress of the device and improving application safety. The selectable current limit feature can be used to provide an adjustable current limit, while the adjustable frequency feature allows the user to customize the switching frequency of the device.

Conclusion

The LM5100CMAX/NOPB is a high frequency, integrated Gate Driver solution designed to accelerate the development of high power Switch Mode Power Supplies and Active ORing applications. The device offers several important features and benefits, such as adaptive gate drive, a fast turn-on time, adjustable soft-start, and selectable current limit, improving system safety and operation reliability. Furthermore, the integrated low saturation voltage monitor offers additional protection against excessive voltages and the external power FETs can be programmed to further improve system performance.

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