SQ48T04120-NDC0

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DC-DC converters are electronic devices used to convert direct current (DC) power from one source circuit to another. They are commonly used to step up or step down voltage and to provide isolation between two voltage sources. In this article, we will be focusing on SQ48T04120-NDC0, a DC-DC converter manufactured by Renesas Electronics Corporation, and discuss its application field and working principle.

The SQ48T04120-NDC0 is a single-phase synchronous buck converter that uses four MOSFET stages, three in P-channel and one in N-channel. It is mainly used in automotive applications such as power supplies for powertrain control modue (PCM) and other subsystems that operate at low and standard voltages. The SQ48T04120-NDC0 operates at a voltage range of 4V to 20V with an output current of up to 120A. It has a wide range of features, such as low cost, high efficiency, wide input and output voltage range, and EMI filtering capability. It also has various low-noise operating modes, over-temperature protection, and a full-cycle soft start function.

The SQ48T04120-NDC0 works by converting the input voltage to a lower level while maintaining the current requirements. The conversion is done using four MOSFETs, which are arranged in a buck configuration. In the buck configuration, the MOSFETs are arranged in series and are used to control the voltage and current between the input power source and the output. The main advantage of the buck converter is that it allows for a high conversion efficiency, since the MOSFETs use less power to carry out the conversion process.

The way the SQ48T04120-NDC0 works is as follows:

When input voltage is applied with a low resistance load, the input voltage is switched through the MOSFETs in a buck configuration. This helps reduce the input current to a lower level while maintaining the required current in the output. The power is then drawn from the output side of the MOSFETs and the output voltage is regulated through the PWM (Pulse Width Modulation) system.

When the voltage and current requirements are too high, the SQ48T04120-NDC0 uses its HPF (High Pass Filter) function for voltage protection. This feature helps to protect the MOSFETs from over-voltage and over-current conditions. In addition, the IC also includes a LED driver and an enable pin to control the PWM system and input voltage.

The SQ48T04120-NDC0 is a high performance DC-DC converter with high power efficiency and a wide range of features. It is suitable for automotive applications such as onboard voltage supplies for PCM and other devices that operate at low and standard voltages. It has a wide range of input and output voltage ranges and an EMI filter for improved performance and reliability.

The SQ48T04120-NDC0 has several advantages such as a wide voltage range, high efficiency, low noise operation modes, an LED driver, over-temperature protection, full cycle soft start function and HPF for voltage protection. Its high efficiency ensures a long operational life and reliability. In conclusion, it is one of the best and most high performance DC-DC converter available on the market today.

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