BA9744FV-E2

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BA9744FV-E2 is a DC-DC switching controller used to maintain system voltage within specified limits. The device includes a voltage regulator, an error amplifier, a current sensing element, and a temperature sensing element. It is used in a wide variety of applications, including automotive, industrial, and consumer electronics.

Features

BA9744FV-E2 combines a synchronous P-channel MOSFET controller, an error amplifier, a current sensing element and a temperature sensing element. It has a wide operating voltage range of 4.5V to 18V and can deliver up to 3A current. It also features a PWM dimming output and supports an independent oscillator frequency up to 600kHz, enabling high switching frequencies and high efficiency. The device also features an overload protection function and a UVLO function to ensure safe operation. Additionally, the device is RoHS compliant.

Application Examples

BA9744FV-E2 is well suited for high efficiency, low cost buck converters that are used for DC/DC power supplies. It is particularly suited for automotive systems, including electric vehicles. Additionally, the device can be used in other voltage regulation applications including charging circuits, LED lighting, and 5V and 3.3V fixed voltage DC/DC converters.

Working Principle

The BA9744FV-E2 has an error amplifier, a current monitoring element, and a temperature monitoring element. The error amplifier compares the voltage at the output with the reference voltage and produces an output signal when the two are not equal. This signal is used to control the ON/OFF switching of the power MOSFET. The current monitoring element, which consists of an NPN transistor, monitors the current flowing through the load. The temperature monitoring function is used to protect the device from overheating.

The BA9744FV-E2 also features a PWM dimming output, which can be used to control the brightness of the output device. The device takes the combination of the brightness control voltage, the voltage reference and the feedback signal from the error amplifier and calculates the PWM duty cycle. The duty cycle is then used to control the power MOSFET in order to maintain a stable output voltage.

Conclusion

The BA9744FV-E2 is a switching controller for DC-to-DC converters offering high efficiency and low cost. It is suitable for a wide range of voltage regulation applications, including automotive, LED lighting, 5V and 3.3V DC/DC converters, and charging circuits. The device has advanced features such as overload protection, PWM dimming output and independent frequency oscillator that can support up to 600kHz. It can be used in a variety of applications, offering reliable and efficient operation.

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