CSD123

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The CSD123 is a high-performance gate driver PMIC component from Texas Instruments that enables driving power MOSFETs and other high-current loads with variable pulse widths and variable pulse rates. It offers an integrated solution for systems requiring the fast switching of load voltages and currents with low noise and low heat dissipation. This PMIC is designed to drive high power MOSFETs, either through separate gate sensing inputs or via the internal over-voltage protection circuit.

The CSD123 consists of six main blocks – the input switching section, the bias voltage monitoring and regulation block, the drive amplifier section, the PWM motor controller, the current sensing block and the physics-based sensing circuit. The input switching section allows for the switching of load voltages and currents with variable pulse widths and variable pulse rates. It uses two low-voltage MOSFETs to convert the DC load voltage into a variable pulse train for the drive amplifier section.

The bias voltage monitoring and regulation block is used to regulate the bias voltage to the drive amplifier section and to ensure that the voltage supplied to the load remains in a specific range. The drive amplifier section converts the variable pulse train from the input switching section into a variable-width pulse waveform used to drive the high power MOSFETs. The PWM motor controller ensures that the output of the drive amplifier is in the correct form for the MOSFETs to operate correctly.

The current sensing block is responsible for sensing the current in the load. The current sensing circuit then processes this sensing information and sends the correct control signals to the PWM motor controller and to the drive amplifier. The CSD123 also provides an over-voltage protection circuit which monitors the load voltage and shuts off the load when the voltage exceeds a certain threshold.

The CSD123 is ideal for systems requiring the fast switching of load voltages and currents with low noise and low heat dissipation. It allows for the conversion of DC load voltages into variable pulse trains with variable pulse widths and variable pulse rates. This enables the use of high power MOSFETs with a low-power PMIC. The integrated over-voltage protection further ensures that the load voltage never exceeds a certain limit. The current sensing block and the physics-based sensing circuit provide accurate current sensing information which can be used to control the PWM motor controller and the drive amplifier.

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