BD93291EFJ-E2

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BD93291EFJ-E2 application field and working principle

As a DC/DC switching regulator, the BD93291EFJ-E2 from ROHM Semiconductor is designed for automotive applications such as 12V and 24V systems. It acts as a more efficient alternative to traditional linear voltage regulators, as it operates more independently of the input voltage, making it highly suitable for applications where the input voltage may fluctuate. It provides up to 2A of continuous current and is capable of delivering up to 98% peak efficiency. Furthermore, it includes additional features such as an on/off function, soft start, and overvoltage protection.

Features

The BD93291EFJ-E2 is specifically designed for automotive applications, and includes the following features:

• Continuous current of up to 2A
• Operates from a wide input voltage range of 3V to 35V
• Up to 98% peak efficiency
• On/off function
• Soft start
• Overvoltage protection
• Compact package size of 8x8mm

Applications

The BD93291EFJ-E2 DC/DC switching regulator is suitable for automotive applications, such as powering 12V and 24V systems, as well as other industrial or consumer applications where higher efficiency is required.

Working principle

The BD93291EFJ-E2 operates by generating a fixed output voltage using a pulse-width modulation (PWM) voltage control system. This PWM control system modulates the input voltage by applying an on/off signal to a power switch, thus creating a varying duty cycle which is then used to set the output voltage. The PWM frequency can be adjusted using an external resistor to control the switching speed.

The output voltage can be set by adjusting the on/off time of the power switch, which is determined by a voltage feedback signal from the output. The voltage feedback signal is compared to a target voltage level by a comparator circuit, and if the output voltage is lower than the target voltage level, the power switch is switched on to increase the duty cycle, and if the output voltage is higher than the target voltage level, the power switch is switched off to decrease the duty cycle. This ensures that the output voltage is constantly regulated to the target voltage level.

The BD93291EFJ-E2 also includes an on/off function which can be used to save power as the device can be shut down when not in use. Additionally, the device includes a soft start function which prevents the device from being overloaded by gradually increasing the output voltage during start-up, and it also includes an overvoltage protection feature which automatically shuts down the device in the event of an overvoltage condition.

Conclusion

The BD93291EFJ-E2 is a DC/DC switching regulator specifically designed for automotive applications. It is capable of providing up to 2A of continuous current, and is capable of delivering up to 98% peak efficiency, making it an ideal choice for applications where input voltage may fluctuate. It includes additional features such as on/off, soft start, and overvoltage protection, and is available in a compact 8x8mm package size.

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