LX7178-01CSP

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LX7178-01CSP has become a popular integrated circuit in the field of DC-DC switching regulator, especially in many communication and consumer-oriented products. This integrated circuit integrates many components of the DC-DC switching regulator in one device, including two voltage regulators, two MOSFETs, an inductor, a diode, and a logic circuit, thus simplifying the design of the DC-DC switching regulator. In this article, we will discuss the application field and working principle of LX7178-01CSP in detail.

Application Field of LX7178-01CSP

LX7178-01CSP is especially suitable for voltage transformation and power supply of mobile equipment and automotive applications, such as mobile phones, tablets, car audio systems, etc. Due to its small package, low power consumption, and high efficiency, LX7178-01CSP is especially suitable for applications with strict requirements on size, weight, and power.

In addition, LX7178-01CSP also supports a wide range of input voltage, from 2.5 V to 12 V, and provides 14A output current. Its peak efficiency reaches up to 95%, and it has a wide frequency range from 100kHz to 1Mhz. The minimum switch on-time of LX7178-01CSP is 70ns, so it can provide a stable output even with a fast load transition.

Working Principle of LX7178-01CSP

LX7178-01CSP uses the same topology as a conventional DC-DC switching regulator. It has two voltage regulators, two MOSFETs, an inductor, a diode, and a logic circuit integrated on a single chip. The two voltage regulators are responsible for controlling the gate signals of the MOSFETs to achieve the purpose of regulating output voltage. The two MOSFETs, one inductor and one diode form an oscillating circuit, and the logic circuit is used to control the gate signals of the MOSFETs.

The LX7178-01CSP works as follows: firstly, the regulator sets a reference voltage, and the comparator compares the reference voltage with the feedback voltage to generate a signal. When the signal is low, the logic circuit uses a PWM signal to switch on the first MOSFET, which allows current to flow through the inductor. When the signal is high, the logic circuit switches on the second MOSFET, and the diode allows the current to flow through the load. This process repeats, thus generating an alternating current to the load and providing a stable output voltage.

Conclusion

To sum up, LX7178-01CSP is a popular integrated circuit in the field of DC-DC switching regulators. It is especially suitable for power supply of mobile and automotive applications, due to its low power consumption, high efficiency, and wide frequency range. The working principle of LX7178-01CSP is to control the gate signals of the MOSFETs by the two voltage regulators and the logic circuit. It forms an oscillating circuit to generate an alternating current to the load and provide a stable output voltage.

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