TC4423VMF

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The TC4423VMF is an integrated part of a System on Chip (SoC) power management scheme, offering an efficient way to drive high power N &P MOSFETs in a synchronous buck or boost converter. It is part of a line of advanced high-performance gate drive ICs from Microchip. At the heart of the TC4423VMF is its input stage, which integrates two high-side MOSFET drivers with independent inputs for on/off control and a high-voltage PWM input. The input stage also contains a low-side MOSFET driver for synchronous rectification and integrated current sensing circuitry for improved system efficiency and thermal protection.

The primary application of the TC4423VMF is to drive N &P MOSFETs in synchronous buck (Step-Down) and boost (Step-Up) boost converter circuits. Its high-side drivers are capable of producing 3A peak (2A continuous) output current and its low-side driver is capable of producing 2A peak (1.6A continuous) output current. This exceeds the requirements of most switching regulator designs, thus providing a robust solution for very high power applications. Multiple TC4423VMF can be used together to drive very high power applications.

The working principle of the TC4423VMF is two-fold. Firstly, it intelligently controls the clock signals of the N &P MOSFETs to reduce switching losses without adversely affecting input and output performance. This is achieved by controlling the current sent to the gate of the switching transistor according to the signal set at the PWM pin. Secondly, the TC4423VMF also uses its integrated current sensing circuit to accurately control the output voltage and current of the switching regulator. This provides improved system efficiency and eliminates the need for an external sense resistor, which reduces cost and board space.

In summary, the TC4423VMF is a high-performance gate drive IC that offers an efficient way to drive high power N & P MOSFETs in synchronous buck and boost converter circuits. It integrates two high-side MOSFET drivers with independent inputs and a high-voltage PWM input, as well as a low-side MOSFET driver for synchronous rectification and integrated current sensing circuitry. Its current sensing circuitry provides improved system efficiency and helps eliminate the need for an external sense resistor. Its integrated thermal protection allows it to sustain continuous operation even in extreme and harsh environmental conditions, making it an ideal choice for high power applications.

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