BD9846FV-E2

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The BD9846FV is a single-channel pulse-width modulation (PWM) mode current control DC/DC converter. It is suitable for step-up, step-down, inverting or SEPIC converters. It functions as a voltage regulator and/or current limiter with excellent accuracy and stability.

BD9846FV-E2 is the latest version of BD9846FV. The package is 39pins VQFN16-2.1. It operates over a wide input range from 3.0V to 16.5V and allows an output current up to 1A. The main advantage of this device is the high efficiency that is achieved by the use of advanced current control. The output voltage is precisely controlled by the internal reference voltage. It features high-voltage operation, soft-start, output-voltage detect, power sequencing, and other features.

Application field of BD9846FV-E2

BD9846FV-E2 is suitable for a wide range of applications. It can be used in industrial, automotive, consumer electronics and embedded systems. It is particularly well-suited for automotive and industrial applications such as battery management systems, solar power systems, and motor control applications. It is also widely used in consumer electronics such as mobile phones and tablet computers.

Working Principle of BD9846FV-E2

The BD9846FV-E2 is a digital pulse width modulation (PWM) current control DC/DC converter. The input voltage is divided via one internal Leclanché divider and is fed into the PWM comparator. When the PWM comparator output rises to the preprogrammed trip level, the PWM modulator switches the power FETs on for a time period defined by the duty cycle control pin. After the switching off time-period has passed, the power FETs return to off and the cycle begins again.

The BD9846FV-E2 integrates a variable-frequency Pulse Widening Modulator (PWM), capable of producing precise step-up/step-down switching waveforms in order to deliver precise loads current with improved accuracy. The PWM modulator is able to produce high-frequency rectangular waveforms like those of the other PWM mode converters.

The device also has several protection mechanisms that are included to protect it from overcurrent, short circuit, and overvoltage conditions. It has a current limit, an overvoltage protection, and an undervoltage lockout. To prevent thermal runaway, the device uses a thermal shutdown. These protections ensure that the device is safe to use and can handle extreme conditions.

Conclusion

The BD9846FV-E2 is a single-channel PWM mode current control DC/DC converter suitable for various applications. It features an internal high-voltage Leclanché divider and a PWM modulator to provide precise load current with excellent accuracy and stability. The protection features ensure the device is safe to use and able to handle extreme conditions. This makes it suitable for use in industrial, automotive, consumer electronics, and embedded systems.

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