LM5109BSDX

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The LM5109BSDX is a high voltage, low side gate driver IC that supports peak output currents up to 1000mA. It is ideal for powering the power MOSFET or IGBT driver that operates from an input voltage range of 3.5V to 20V. It features an adjustable bootstrap switch current compensation loop, allowing the user to customize the device for the application in order to maintain optimal performance. The LM5109BSDX also features a high-side gate driver without bootstrap for maximum flexibility.

The LM5109BSDX operates in PMIC - Gate Driver field. Gate drivers are a type of power amplifier which provides the necessary activation of the Gate terminal of the FETs which are used in many electronic switching and power circulation applications. Gate Drivers typically convert logic level voltage signals into higher voltage signals. The LM5109BSDX gate driver has been designed primarily to drive N-channel FETs, like Power MOSFETs, and IGBTs.

The LM5109BSDX gate driver is designed to deliver lower RDS(ON) gate charges to the gate of the load MOSFET or IGBT switches while providing high voltage gate drive stimulation. It operates from an input voltage from 3.5V to 20V, so that it can be powered from many sources like a DC voltage supply, a battery or a pair of regulated components. The LM5059BSDX can also distribute a variety of isolated gate drive with adjustable primary gains and timing control.

The LM5109BSDX also includes internal boost converter, which can reduce the power of the Gate voltage with input power supply level of 2V. The built-in pull-down resistor can also be used to provide some protection from sudden surge of inverter or generator sources.

The user can configure the LM5109BSDX gate driver to deliver different levels of output current and to optimize its performance with the adjustable loop gain and dead-time control. These adjustable parameters ensure stable and efficient operation in both continuous and pulse-width modulation (PWM) mode. The continuous current can be programmed up to 1000mA and PWM frequency up to 20 kHz.

In short, the LM5109BSDX provides a single-channel integrated solution for low side gate drive applications. Its robust design and multi-turn adjustment enable users to easily set up their desired output current and performance evaluation. This high voltage, low side gate driver is an ideal solution for controlling FETs and IGBTs for switching and power regulation applications.

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