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TL1454ACD Application Field and Working Principle

The TL1454ACD is a high voltage monolithic integrated switch controller (DCDC controller) designed for use in a variety of high voltage DC to DC conversion applications, such as from 12V to 48V. It is designed to control and provide regulation for step-up and step-down DC to DC converters, allowing for wide input voltage ranges, full or limited power delivery, and minimal external circuitry.

Application Field

The primary intended applications for the TL1454ACD include an array of high voltage DC to DC conversion applications such as bringing 12V to 48V, or 48V to 12V. These applications may require very wide input voltage ranges, full or limited power delivery, and minimal external circuitry. The TL1454ACD features a high power transfer that is capable of regulating these wide input voltage ranges, as well as a selectable peak current mode providing control of the converters output power and ripple. In addition, it provides a fast Transient Response to Load Step and line regulation with minimized overall output noise, maximizing converter performance.

Working Principle

The TL1454ACD is a high voltage switching regulator/controller integrated circuit (IC) designed to control and provide regulation of step-up and step-down DC to DC converters. The IC is capable of controlling high voltage DC to DC converters and delivering output voltage high voltage up to 48V. It also provides fast transient response to load steps and line regulation with minimized overall output noise, maximizing converter performance. The converter’s current mode modulator consists of an internal peak current sense, a VID and VRef inputs, and E/A (Error Amplifier). The Peak Current Sense circuit and Error Amplifier controls the duty cycle of the switch, and based on the current sense signal and output voltage the duty cycle is set. The voltage divider at the output of the Converter is connected to the ERROR amplifier feedback input to maintain the error signal to zero, which regulates the output voltage of the converter.

Overall, the TL1454ACD offers full or limited power delivery for a variety of high voltage DC to DC conversion applications. With its wide input voltage range, fast transient response, and minimized overall output noise, it provides very high performance and power transfer that is optimal for highly reliable, high voltage DC to DC conversion applications.

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