A8904SLB-T

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PMIC - Motor Drivers, Controllers

The A8904SLB-T is a voltage-mode buck controller from Advanced Power Electronics Corporation (APEC). It is a precision, low-power, low-cost integrated solution for step-down voltage conversion applications and is suitable for applications such as notebooks, hard drives, embedded systems, digital cameras, audio and video systems, and general-purpose power supplies.

The main feature of the A8904SLB-T is its efficiency. By utilizing its advanced control techniques, high-precision output voltage, current and power management, and its advanced gate driving, this converter is able to achieve high efficiency even at light loads, making it an ideal solution for integrated applications with multiple power rail requirements. This voltage-mode buck controller also features built-in protection features, including over-voltage, under-voltage, and over-current protection.

The A8904SLB-T is based on a voltage-mode control principle, which enables the device to accurately regulate an adjustable output voltage. It also uses a synchronous mode topology, which provides better performance than a traditional buck-boost converter by providing higher switching frequency and better efficiency. The controller utilizes two internal low-side MOSFETs to regulate the output voltage, while consuming minimal current at low output loads. The controller can work with a wide range of output inductor sizes, from 8μH to 30μH, making it ideal for many applications.

The application fields of the A8904SLB-T are vast and cover a wide range of power applications. It is suitable for use as a step-down converter for notebook/laptop power supplies, peripheral power systems, and embedded systems such as network switches, routers, and storage systems. This product is also suitable for powering text LCDs, set-top boxes, digital video recorders, video games, audio/video systems, and more.

In operation, the A8904SLB-T control the output voltage and current by detecting the input voltage and then performing an internal comparison between the detected input voltage and the reference voltage, adjusting the switching duty cycle accordingly. The voltage-mode control also allows for more accurate detection of changes in the load current, resulting in more precise regulation of the output voltage.

The A8904SLB-T also supports other features such as output voltage ramp-up, over-current protection, short-circuit protection, over-voltage protection, under-voltage protection, and thermal protection. This makes it an ideal choice for various applications and provides superior performance compared to other integrated solutions for low-power applications.

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