TPS54326PWPR

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TPS54326 is a two-phase, synchronous buck PWM controller for voltage regulation applications. It features integrated high- and low-side gate drivers, current sense amplifier, and flexible adjustment of switching frequency and dead time. It includes additional features such as skip mode, optimized fade-in/out control scheme, and voltage tracking sync pins to maximize power delivery and efficiency. The TPS54326 provides a cost-effective solution that is ideal for applications requiring a high performance, low quiescent current, low external component count ≤ 16 V input voltage supply system.

TPS54326PWPR application field mainly involves DC/DC buck regulator, and AC/DC or DC/AC inverters with various modes of operation. It is well suited for applications such as laptops, digital cameras, data storage systems, Ethernet switches, wireless base stations, industrial automation, video systems, set-top boxes, and broadband access modems.

In terms of working principle, the TPS54326PWPR uses a two-phase buck topology for maximum power efficiency. This controller also supports skip-mode operation for ultra-low-noise operation at light load conditions and below. There is a dual ramp soft-start circuit to limit input current or output voltage during start-up. The TPS54326PWPR provides cycle-by-cycle current control using precision voltage mode control by comparing the feedback voltage and the internal error amplifier output. It also offers a heavy-load (HLL) current-limit option that minimizes the output voltage droop under heavy-load conditions. The switching frequency can be varied from 160kHz to 800kHz by external resistor, the output voltage can be externally adjusted for most efficient application. The enable pin allows a low-power standby mode.

In addition, the TPS54326PWPR provides a trim function to optimize output accuracy. The trim function is active from output short-circuit to output open-condition and can be used to set the output voltage to any voltage within the rated voltage range. The device also includes a synchronous-rectification Option Control pin, which enables the user to select between synchronous or hard-switching operations. Other features include integrated soft-start, adjustable dead-time and synchronization option.

In terms of safety, the TPS54326PWPR implements a variety of protection features. Over-current protection (OCP) is also provided, with an adjustable threshold and a current limit available. Additional protection features include thermal shutdown with hysteresis, under-voltage lockout, over-voltage protection, and over-temperature protection.

In conclusion, the TPS54326PWPR is an efficient and reliable PWM DC/DC buck controller for voltage regulation applications. It features integrated high- and low-side gate drivers, current sense amplifier, and flexible adjustment of switching frequency and dead time. With its intuitive and versatile features, the TPS54326PWPR provides a cost-effective solution for a wide range of applications.

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