MAX14745CEWX+T

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - Battery Chargers

MAX14745CEWX-T is an integrated power management integrated circuit (PMIC) specifically designed for low power applications. It is ideal for powering portable consumer electronic devices such as handheld media players, digital still cameras and smart phones. The device is a unique, patented dual-channel charger with precise current and voltage regulation for both 5-V and 3.3-V output rail charger applications.

Features

• Complete charge management and supply regulation solution.
• Independent buck and boost regulation.
• EMI reduction feature.
• Wide input voltage range.
• Safety features include overtemperature and overcurrent protection.
• Integrated buck and boost regulators.
• High efficiency.
• Low quiescent current.

Application Field of MAX14745CEWX-T

The MAX14745 is an ideal power solution for applications such as digital still cameras, portable media players, smartphones and other consumer devices that have limited external space yet need both 5 V and 3.3 V outputs. This device allows the designer to use a single solution to power the various components in handheld and other small form factor systems. Also, this device eliminates the need for multiple regulators, saving board space and cost.

Working Principle of MAX14745CEWX-T

The MAX14745 is a dual-channel synchronous buck-boost converter with two selectable output voltage levels. The main buck (VOUT1) circuit provides a regulated 5-V output with a maximum output current of 1 A, from an input voltage range of 4.2 V to 6 V. The second output, VOUT2, is a synchronized boost converter that is used to regulate an output voltage of either 2.5 V or 3.3 V. It has a maximum output current of 500 mA with an input voltage range of 1.4 V to 6 V.

The device has an on-chip MOSFET, eliminating the need for an external MOSFET, resulting in lower power dissipation and increased efficiency. The device allows the user to select between a forced PWM (FPWM) mode or an auto-dimming PWM (ADPWM) mode depending on their application needs. The device also has an EMI reduction feature which helps to reduce the amount of conducted emissions.

The device also has various safety features, including over temperature protection and over-current protection, which will protect both the device itself and any connected load from any damage. The device also has input and output undervoltage lockouts, ensuring that the device does not enter operation until the input voltage is greater than the programmed undervoltage threshold.

Conclusion

The MAX14745CEWX-T is a unique, patented dual channel charger for the 5 V and 3.3 V output rail charger applications. It integrates both buck and boost circuits into a single package, eliminating the need for multiple regulators and allowing for compact designs with low power losses. It supports an EMI reduction feature and offers various safety features, as well as two adjustable output voltage levels. The device is ideal for powering portable and other small form factor devices such as digital still cameras, media players, and smartphones.

The specific data is subject to PDF, and the above content is for reference