UCC28084PW

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The UCC28084PW is a pulse width modulation (PWM) controller used in power supplies. This device is a PMIC – Voltage Regulators – DC DC Switching Controller and provides the control of a wide range of DC to DC voltage conversion topologies. It externally provides the optimum control and protection of a variety of off-line, DC and DC to DC power converters. This device is used in power modules, adapters, ballasts and many types of power supplies.

The UCC28084PW includes a dedicated low side power switch which controls the dead time of a high side and low side synchronous power switch, thus allowing a full Digital Power Processor (DPP) architecture. This device provides for Programmable Power Management (PPM) which allows each output on the device to be configured independently for an adjustable power delivery. In addition the device contains comprehensive protections, comprehensive diagnostics and optional voltage or current mode control.

The device includes an integrated 300 mV reference voltage, eliminating the need for an external reference. This 300 mV reference is used to generate a threshold voltage of 219 mV to detect the current consumed by a synchronous rectifier. It also contains a VCC monitor pin which monitors the device’s power supply voltage level and provides an active-low output if the voltage is lower than the specified threshold. The device also contains a soft start circuit which provides a slow ΔV/Δt start-up to reduce startup current, which is adjustable through a single resistor.

The device includes a built-in start-up sequence to ensure accurate and safe operation. It includes a soft start circuit, a feedback ramp generator, a high-side driver, and a current limit timer. This start-up sequence provides a smooth, controlled startup and ensures maximum system reliability.

The UCC28084PW is designed for use in a wide variety of DC to DC converter designs. It offers a variety of features including Programmable Power Management (PPM), adjustable deadtime, flexible step down switching, and adjustable output voltage. It is designed to operate in voltages ranging from 4V to 100V and can source up to 600 mA of current.

The device contains various protection features including over-voltage protection, over-temperature protection and over-current protection. It also allows for the adjustment of the dead-time and frequency to ensure that the converter maintains peak efficiency under light and heavy load conditions. The device also includes protection against reverse polarity connection and ESD protection for both ON and OFF states.

In addition, the device includes a PWM Comparator with a wide dead-time range from 0 to 10 ms. This comparator is used to compare the regulated output voltage of the converter to the reference voltage and adjust the duty cycle of the converter to maintain the output voltage. It also features ultraviolet (UV) fault protection and thermal shutdown.

The UCC28084PW provides an easy way to produce a DC to DC converter with improved power efficiency. This device offers easy integration into various applications and allows for the accurate selection of an appropriate power management technique to achieve the desired performance.

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