LP3947ISD-09

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Power Management Integrated Circuit (PMIC) devices are an important part of many electronic devices and systems, including battery chargers. The LP3947ISD-09 is a PMIC device used in applications that require charging of lead-acid, nickel metal hydride, or lithium-ion batteries.

Designs for battery chargers require cost, performance, and reliability, and PMICs help meet those goals. The LP3947ISD-09 has the capability to both monitor the battery charge state and charge it from various sources such as a wall adapter, USB, or fuel cell. As a synchronous buck regulator, it is both highly efficient and flexible.

The LP3947ISD-09 works by first converting the battery current from a wall adapter or other source into a manageable DC output. This DC output is passed through the power management block which controls the voltage and current output to the battery. This includes monitoring the battery charge and temperature, as well as the current drawn from the charger. This allows the LP3947ISD-09 to adjust the charging characteristics of the device and prevent damage to the battery.

The LP3947ISD-09 can operate in both continuous and discontinuous modes. In the continuous mode, the device switches between the two operating modes based on the detected battery voltage. In discontinuous mode, the device uses two voltage set-points. When the battery voltage reaches the higher set-point, the stock regulator is switched off, allowing the battery to float until its voltage drops below the lower set point and is charged again.

The LP3947ISD-09 also includes safety features. These include an Automatic Temperature Compensation (ATC) to protect the battery from overcharge and temperature related issues. It also includes short circuit and over-voltage protection to prevent damage to the battery and other components. Finally, it includes a deep discharge lockout feature to protect against deeply discharged batteries that can be damaged by overcharging.

The LP3947ISD-09 can be used in a variety of applications such as computers, mobile phones, MP3 players, and other devices that require charging of lead-acid, nickel-metal hydride, or lithium-ion batteries. It is also a good choice for industrial and medical applications that require precise charging parameters. Overall, the features of the LP3947ISD-09 makes it an excellent choice for high performance, cost effective, and reliable battery charging.

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