BD7683FJ-LBE2

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The BD7683FJ-LBE2 is a PMIC (Power Management IC) from ROHM Semiconductor that was designed to take care of a wide range of power supply needs, from AC/DC converters and offline switchers to Li-ion battery charging. It comes in an 8-pin SOT-23 mounting package and is suitable for low voltage applications such as cameras, PDAs, and portable audio players.

The BD7683FJ-LBE2 is a cost-effective and highly integrated integrated power management solution. It contains a charge pump DC/DC converter, auto-tracking battery charger, step-down switching regulator, LED driver, and analog reference. All of these components are tightly integrated and packaged in a low-profile SOT-23 package, which enables end products to be miniaturized and cost-effective.

The charge pump DC/DC converter within the BD7683FJ-LBE2 offers the advantages of low cost and low quiescent current. It is capable of supplying DC output voltages from 1V to 6V with a maximum output current of 200mA. This makes it ideal for powering peripherals such as cameras, audio players, and memory cards. The charge pump also features external start-up sequence control and enable function, making it easy to enable/disable the charge pump.

The auto-tracking battery charger in the BD7683FJ-LBE2 is designed to charge Li-ion batteries for portable devices such as PDAs, cameras, and cellular phones. It supports various charging modes, such as constant current/constant voltage and top off charge. With its auto-tracking capability, the battery charger is able to detect the battery type and select an appropriate charging mode. It also offers a soft start mode to reduce inrush current. The charger supports a wide input voltage range of 4.5V to 13V, making it suitable for applications using both AC adapters and USB power.

The step-down switching regulator integrated in the BD7683FJ-LBE2 makes it suitable for use in low voltage applications. It is capable of supplying output voltages ranging from 1.5V to 4.5V and can deliver up to 250mA of output current. It also features a low output ripple for high system efficiency as well as maximum and minimum voltage detection. The switching regulator also features a power saving function which reduces the output ripple and reduces quiescent current.

The LED driver integrated in the BD7683FJ-LBE2 is able to support two external LEDs. It is capable of driving LEDs from 0V to 7V with a total output current of 50mA. It is adjustable via an external register and features an enable pin for easy control of the LEDs. It also features comprehensive protection functions, including short, over-temperature, and voltage protection.

Finally, the BD7683FJ-LBE2 also features an integrated analog reference, which is suitable for use as a reference voltage source in other parts of the circuit. This ensures that voltage regulation is accurate and stable throughout the system.

In conclusion, the BD7683FJ-LBE2 is a highly integrated PMIC (Power Management IC) designed for use in low voltage applications. It contains a charge pump DC/DC converter, auto-tracking battery charger, step-down switching regulator, LED driver, and analog reference, all of which are tightly integrated and packaged in a low-profile SOT-23 package. This makes it ideal for use in low voltage applications such as cameras, PDAs, and portable audio players.

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