MB3778PFV-G-BND-EFE1 application field and working principle

The MB3778PFV-G-BND-EFE1 is a high-performance switching regulator with on-chip power MOSFETs. Used for DC to DC converter, the device incorporates a space-saving 8 pin package and a sense resistor. It features a wide input voltage range of 4.75V to 65V, adjustable output voltage of 0.9V to 24V, 2A output current, and low power consumption.

Application Field

The MB3778PFV-G-BND-EFE1 is suitable for various applications such as DC to DC converter, LED lighting systems, power adapter, battery charger, electric bike, PWM controller, and motor control. It is also suitable for point-of-load converters, smart phones, and automotive systems.

Working Principle

The MB3778PFV-G-BND-EFE1 is based on a buck topology. It operates in a pulse-width modulation (PWM) mode, meaning it can convert a DC input voltage of 4.75V to 65V and output a constant voltage of 0.9V to 24V. The device uses a MOSFET as the main switch, which is controlled by the output voltage feedback. The peak current is sensed by an integrated sense resistor and used for current control.

The device\'s onboard PWM controller maintains the output voltage constant by driving the MOSFET switch. The output voltage is adjustable by connecting either a variable resistor, or a voltage divider, to the voltage feedback signal. The device also features overcurrent protection and thermal shutdown. It will automatically switch off the output when overcurrent or over-temperature occurs.

Conclusion

The MB3778PFV-G-BND-EFE1 is a high-performance switching regulator with on-chip power MOSFETs and a wide input voltage range. It is suitable for applications like DC to DC converter, LED lighting systems, power adapter, and battery charger. The device operates in a pulse-width modulation (PWM) mode and its onboard PWM controller maintains the output voltage constant. It also has features such as overcurrent protection and thermal shutdown.