BD8668GW-E2

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BD8668GW-E2 is a highly advanced power management integrated circuit (PMIC) designed to increase mobile device battery life and reliability. This device is part of the BD8668GW family of intelligent battery charging solutions. It provides a full, rich battery charging solution with packed features to enable more controlled and efficient charging operations that extend battery life and improve device performance.

BD8668GW-E2 is a dedicated battery charger that mainly provides power supply, current measurements and thermal control of batteries and is designed to meet the power requirements of portable devices. It supports various sealed and vented li-ion/polymer and li-fe-based cells. It offers a broad range of charging options for 2 or 4 cells in series configurations. It includes charge authentication, protection and thermal monitoring functions.

Application Field:
BD8668GW-E2 can be used in various applications, ranging from smartphone and tablets to portable medical or military powered systems. It can also be used in automotive, aerospace, and industrial battery chargers, as well as military, medical and aviation power supplies. The device is also well suited for laptop, portable device and other wearable battery chargers.

Working Principle:
The BD8668GW-E2 consists of a constant voltage loop, a constant current loop and a temperature loop. The working principle of the constant voltage loop is to provide a stable reference voltage and current to charge the battery. The constant current loop provides a constant current to the battery as the cell voltage increases to the preset voltage while charging. The temperature loop ensures that the temperature of the battery during charging remains within the range required for safe operations. The device also features Under Voltage Lockout protection that prevents over-discharge of the battery. It also includes over-charge, over-current and thermal protection. Additionally, several intelligent functions such as adaptive charge current, recharge control, charge termination and charge complete indication are integrated into the device.

The BD8668GW-E2 also provides visual feedback of the battery charge level and other related battery parameters. The device uses external LEDs to indicate the charging state and a low battery (LB) signal is held low while the battery is not charging. This allows the device to provide a visual indication of the battery’s charge state.

In addition to providing power conversion, current measurement and thermal control, the BD8668GW-E2 also includes a power MOSFET switch to control the charging voltage and current. This allows the charger to be programmed for various charging profiles, depending on the battery type or application. It integrates an oscillator for the current-setting resistors, and a fast over-current detection circuit for battery protection.

The BD8668GW-E2 is an ideal device for portable and wearable applications powered by Li-ion/polymer and LiFe-based batteries. With its comprehensive set of features, it increases system reliability and battery life as well as providing safe charging operations.

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