ACT8936

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The ACT8936 is a low-cost, highly integrated, low-power, precision-performance power management integrated circuit (PMIC) from AnalogicTech that provides integrated power solution for mobile and consumer electronic products. This PMIC device provides support for a wide range of application fields and many different functions, including system power sequencing and management, power supply regulation, audio codec powering, USB powering and charging, Bluetooth powering, and battery charging. This article will discuss the application fields and working principles of the ACT8936.

The ACT8936 has several key features that make it an excellent choice for power management in mobile and consumer electronic products, including a high-efficiency, 1.2MHz step-down DC-DC converter, a 1.2MHz step-up DC-DC converter, a 1.2MHz switch mode buck-boost DC-DC converter, a wide range of programmable resistors and an EMI filter, and a comprehensive set of power supply sequencing and control functions. The ACT8936 can operate from an input voltage range of 3.4V to 6.5V and provides an output voltage range of 0.8V to 5.5V, making it suitable for a wide range of applications.

The ACT8936\'s step-down DC-DC converter offers high efficiency and low quiescent current for down converting the system voltage in power-sensitive applications. It has adjustable soft start, low dropout, and programmable frequency up to 1.2MHz. Multi-phase synchronous operating mode reduces phase current ripple, allowing higher phase current and therefore higher power capability than single phase configurations.

The ACT8936\'s step-up DC-DC converter is also capable of outputting up to 1.2MHz with adjustable soft start and low dropout. The DC-DC converter has a PFM mode that offers high efficiency over a wide load current range, making it an ideal choice for applications that require high power.

The ACT8936 includes a high-frequency switch mode DC-DC buck-boost converter that can output up to 1.2MHz, with adjustable soft start and a wide input voltage range. This buck-boost converter is ideal for applications that require a high-efficiency, highly adjustable way to convert voltage or current.

The ACT8936 also supports a wide range of programmable resistors, including adjustable current source, analog mux, boost PWM, and an I/O expander. These integrated resistor components can be used to configure various power sequencing and control configurations. The integrated EMI filter also reduces noise in the outputs, making the ACT8936 an ideal choice for applications that require low-noise power supplies.

The ACT8936 also supports four audio codecs, which allows the user to customize the audio output based on the application. It supports stereo headphone driving, microphone pre-amplification, and digital audio interface. The integrated USB Power Port controller provides power supply regulation for powering USB-powered devices and integrates USB battery charging circuits for charging of Li-ion batteries. The ACT8936 also integrates a comprehensive battery charging system supporting Li-ion and NiMH batteries, with charging detection, battery protection, and automatic trickle charging functions.

In summary, the ACT8936 PMIC includes an extensive set of features that make it an excellent choice for power management in mobile and consumer electronic products. It is a highly integrated and low-power solution that provides integrated power regulation, power sequencing and control, audio codec powering, USB powering and charging, Bluetooth powering, and battery charging. The ACT8936 is also highly configurable, allowing the user to customize the power system for specific applications.

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