MAX8724ETI+

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MAX8724ETI+ is a highly integrated and efficient single-cell linear Li‑Ion battery charger IC for portable applications. The device is capable of operating from a universal input voltage between 4.5V and 18V. It eliminates the limitation of USB charging, which requires a constrained input supply range. In addition, it is provided with a regulated synchronous boost converter configured to generate an adjustable output voltage between 2V and 5.25V.

The MAX8724ETI+ is specifically designed for cost-sensitive, compact portable device applications. It integrates all the high-voltage MOSFETs, current and voltage sense resistors, and passive components required to implement a complete single-cell Li-Ion battery charger. The charger is capable of delivering a programmable maximum charge current as high as 1.4A. The current is set by a 6-bit I2C interface or by a resistor divider. Its integrated high efficiency synchronous boost converter allows it to provide higher charging currents at the given input voltage.

One important aspect of the MAX8724ETI+ is its integrated safety features. It includes multiple protections to ensure that the battery is charged and discharged safely. The device features two levels of overvoltage protection (OVP) on the input and battery that prevent over-charging of the battery. It also includes protections against battery over-discharge and over-temperature conditions. The device includes an internal thermal shutdown to protect the charging system from damaging heat levels.

The MAX8724ETI+ application field can be found in a wide variety of applications including smartphones, digital cameras, multimedia devices, and portable gaming devices. It has been designed to achieve highest levels of efficiency to help offer longer run time and reduce charge time. The device is capable of supplying up to 1.4A of current for fast charging. The integrated boost converter can generate a regulated output voltage of up to 5.25V for applications that require higher outputs than that provided by USB.

The MAX8724ETI+ working principle is based on the features of a linear charger. A linear charger is a device used to charge a battery by passing a fixed direct current through the battery. This direct current is regulated to ensure that the battery is not overcharged or undercharged. The device includes a SenseFET, a low-power MOSFET used to set the charging current. The device also includes a series of internal current sense resistors that allow the device to detect when the battery is full and shut off the charging process.

The MAX8724ETI+ provides users with a highly efficient and reliable charging solution. By integrating all the necessary components into a single IC, the device is capable of providing maximum charging currents with minimal heat dissipation. Its advanced safety features protect the battery from overheating and overcharge, allowing it to safely power portable devices for extended periods of time.

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