LM5102MM/NOPB

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Power management integrated circuit (PMIC) is a device which can be used for controlling the power supply in circuits and helping to provide availability of several functionalities such as protecting, controlling and monitoring the power supplied in a circuit. One of the components from PMIC family is Gate Drivers which are the circuits that are used for providing drive current to MOSFETs, thereby controlling their switching state. LM5102MM/NOPB is a Gate Driver IC used to control power switch circuits in different applications.

The operating temperature range of the LM5102MM/NOPB is -40°C to 85°C, and the board power supply voltage rage is 4.5V to 28V. The device includes hysteretic control circuit, low on-resistance high-side and low-side gate drivers, and can directly control a wide range of simple and synchronous rectifier power circuit configurations. The control circuit of the LM5102MM/NOPB is designed with hysteretic control technology with adjustable current limit and over voltage protection. This device can effectively reduce the number of components required to drive power switch circuits, and so reduces the board space and cost of the system.

Application of LM5102MM/NOPB

LM5102MM/NOPB is an integrated gate driver IC, which offers a wide range of applications such as DC-DC, buck converters, synchronous rectifier power circuits and low power supply applications. It is suitable for Multi-phase systems which require lowest RDS(ON) and lowest gate charge. It has a wide power supply range, and a high efficiency control circuit with complete protection circuits, making it suitable for industrial, automotive and many other applications.

Working Principle of LM5102MM/NOPB

The LM5102MM/NOPB device works on a hysteretic control circuit and includes ultra low RON MOSFET’s high side and low side drivers. This device has a wide power supply range and is capable of controlling different synchronous rectifier power circuit configurations.

The hysteretic control circuit of LM5102MM/NOPB gates the MOSFET’s using direct enable logic control interface. This device is designed to operate with fixed 2V voltage level at its non-inverting input, that remains constant. The switching circuit between the high side and low side power switches can include a pull-up resistor, this will pull the output to VDD and VGATE will be high until the drive voltage from the high side is provided.

The current limit adjuster on the LM5102MM/NOPB sets the current limit at which the device starts to operate during the start up process. This ensures that the operating current of the system is always within its threshold. The over-voltage protection feature prevents the system from being damaged due to sudden rise in the output voltage.

The low RDS(ON) MOSFET’s feature of the LM5102MM/NOPB ensures low power losses and efficiency during the operation of the system. This helps in reducing thermal dissipation and hence EMI generation, making the system suitable for operation in a noise-sensitive environment.

Conclusion

LM5102MM/NOPB is an efficient and reliable gate driver IC, which can be used for controlling power switch circuits in different applications. With its features such as hysteretic control, low RDS(ON) MOSFETs, adjustable current limit and over-voltage protection, LM5102MM/NOPB is a suitable device for Multi-phase systems, industrial and automotive applications.

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