BD7684FJ-LBE2

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PMIC - AC DC Converters, Offline Switchers are used to produce power from one type of source and to deliver it to a load as a different type. These power conversion devices are an integral part of many embedded systems, from laptop computers to electric vehicles and healthcare equipment. BD7684FJ-LBE2 is an integrated offline switcher IC optimized for low losses that supports a synchronous rectification method for ultra-low standby power loss.

BD7684FJ-LBE2 lower power loss makes it suitable for applications requiring reduced standby power consumption. This integrated switcher IC is designed to comply with international energy efficiency standards, such as the The ECO Design Directive and IECEE CB Scheme.

Application Field
BD7684FJ-LBE2 is suitable for many low power AC source applications, including adapters, wall-mounted chargers and automotive electronics. It offers high efficiency in a wide range of line and load conditions, resulting in energy savings that help to meet energy regulations.

The integrated switcher IC is well-suited for applications where a leading power factor is required, such as in desktop computer and laptop power supplies. It is also suitable for charging from mains and Li-ion battery powered applications, such as laptop adapters and portable chargers.

Working Principle
BD7684FJ-LBE2 uses synchronous rectification for power conversion. It features a high-voltage startup control circuit and integrated step-down current mode PWM controller. The startup control circuit monitors the input voltage and turns on the controller once the input voltage has reached the desired level. The PWM controller regulates the output voltage by comparing it with a reference voltage and utilizing pulse width modulation (PWM) to reduce the power loss when the device is preventing excessive voltage being supplied to the load.

The high voltage startup control circuit and integrated step-down current mode PWM controller in BD7684FJ-LBE2 provide a smooth transition to the low power consumption operating mode. It also compensates for temperature variations and output voltage resonances. The device can be configured to operate in either continuous conduction, discontinuous conduction or a mixture of both modes.

In addition to the switching and protection features of BD7684FJ-LBE2, the device is also equipped with built-in protection features. It includes OVP, OCP and UVLO which protect against overvoltage, over-current and under-voltage conditions. These safety features protect against possible damage to circuitry and components.

BD7684FJ-LBE2 is an integrated low power offline switcher optimized for low losses. It is suitable for a wide range of applications where reduced standby power consumption is required and features high accuracy current mode PWM regulation and integrated protection features. The device offers a wide range of features and capability, allowing designers to choose the best solution for their specific application.

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