TL2845BDRG4-8

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The PMIC or power management integrated circuit (PMIC) is an integrated circuit that contains DC-DC switching controllers to regulate voltage. TL2845BDRG4-8 is a tailored 8-pin PMIC device that features an exceptional combination of an integrated high side N-Channel MOSFET driver with linear regulator for automatic power source selection, low-side power switches, and a synchronous buck regulator. This device allows applications the flexibility to seamlessly select among multiple power sources such as battery (or the charger connected to the battery) and the USB port while managing power distribution between the multiple components of the application.

The TL2845BDRG4-8 is ideal for a variety of applications such as mobile phones, PDAs, notebook PCs, digital cameras, PDAs, and many other portable devices. The 8-pin TL2845BDRG4-8 package allows for easy integration into any system requiring an integrated power solution for multiple devices.

TL2845BDRG4-8 has two integrated high-side drivers, an input for selecting between two power sources, and an integrated low-side power switch for a total of four power switches. The TL2845BDRG4-8 also includes a charge controller, linear regulator, and a buck regulator.

The Application Field of TL2845BDRG4-8:

• Portable electronic devices
• Notebook PCs
• Digital cameras
• PDAs
• Cellular phones

The Working Principle of the TL2845BDRG4-8:

The TL2845BDRG4-8 is a power management IC which provides enhanced features and performance for powering a variety of portable electronic devices. It features an integrated high-side power switch, a low-side power switch, a linear regulator, and a buck regulator. The integrated high-side power switch enables programmable selection between two power sources, allowing for additional power source flexibility. The integrated low-side power switch simplifies the design of multiple power regulator systems. The device includes a charge controller, linear regulator, and buck regulator to provide efficient, low-noise, precise power control for the various circuits in a system.

The high-side power switch and low-side power switch are configured through programming which allows for programmable selection between two power sources. This feature provides flexibility in selecting the appropriate power supply based on the application. The linear regulator and buck regulator are each separately managed and configured. The regulated voltage is set by connecting the suitable voltage reference device to the corresponding power supply. The on-chip linear regulator is used when the input voltage is low, while the buck regulator is used when the input voltage is high. When the power supply is changed, the device automatically selects the correct power source and switches the power supply accordingly.

The charge controller is a feature of the TL2845BDRG4-8 which provides a control loop for charging a battery connected to the system. The charge controller senses the voltage of a battery and compares it with the user-programmed voltage reference. The charge controller will then generate a PWM signal to control the charging current going to the battery. This feature provides a safe and reliable method for charging a battery without overcharging or undercharging.

Overall, the TL2845BDRG4-8 is an ideal solution for portable devices and systems requiring an integrated power solution for multiple components. With its multiple power switch and power regulator features, it enables system designers to easily and reliably power their devices. With its ability to select between two power sources and programmable charge controller, it provides a reliable solution for a variety of applications.

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