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PMIC - Battery Management

The PI3USB9281BGEEX is a highly integrated Battery Management Power Switch IC from Diodes Incorporated. This device is a low voltage, low power switch IC designed to replace up to four discrete components while providing robust protection features in battery-powered and automotive applications. The integrated high- or low-side MOSFETs can be used to switch between a battery supply, system power supply and battery charger.

The PI3USB9281BGEEX is capable of providing an input voltage range of 2.6 V to 5.5 V, an on-resistance of typical 5 Ω and can support load current up to two amps. It offers a stand-by control pin for high efficient applications and an adjustable timeout protection. The adjustable timeout protection allows for programming of the time interval that it takes for the power switch to turn off after the input voltage is removed (e.g. for storing the charge for extended periods).

The PI3USB9281BGEEX also features robust Electrostatic Discharge (ESD) protection with the integrated ESD protection diodes, short-circuit protection with current limit, over-temperature protection, and input under-voltage protection.

Application Field

The PI3USB9281BGEEX can be used in applications such as mobile phones, tablet PCs, wearables, digital cameras, portable gaming consoles, M2M device, automotive, home appliances and other battery-powered applications. It\'s ideal for applications requiring high efficiency power switch circuit, robust protection features and safety requirements.

Working Principle

The PI3USB9281BGEEX integrates a low RDS(ON) high-side MOSFET for switching between a battery supply and system power supply, and a low RDS(ON) low-side MOSFET for switching between a battery charger and system power supply. The integrated BUCK converter is responsible for providing the supply voltage from the battery to the load and can provide up to two amps with its high current output capability.

The integrated high-side and low-side MOSFETs both have circuitry to reduce the turn-on voltage, which enables these switches to be used in low voltage applications. In addition, the high- or low-side switches can be operated independently of each other or in parallel for higher current applications.

The PI3USB9281BGEEX also has integrated robust protection features, such as short-circuit protection, over-temperature protection, input under-voltage protection, adjustable timeout protection and ESD protection. The adjustable timeout protection is adjustable and can be used to set the time interval in which the power switch turns off after input voltage is removed (e.g. for storing the charge for extended periods).

The PI3USB9281BGEEX is a versatile low voltage, low power switch IC and can be used in a variety of battery-powered applications. It is an ideal solution for applications requiring high efficiency, robust protection features and safety requirements.

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