TL2844D

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TL2844D is a DC/DC switching controller integrated circuit (IC) belonging to a family of switched-mode power supplies (SMPS). The TL2844D is integrated with all the required control, protection, and gating commands for a DC/DC converter. It also provides over-current protection, over-temperature protection, output voltage regulation, and a wide operating temperature range. Additionally, it can also be used in buck and boost regulator applications, with adjustable output voltage.

Application Fields

The TL2844D is typically used in efficiency-critical DC/DC converter designs for portable devices, such as laptop computers, mobile phones, and game consoles. Due to its robustness and small size, the TL2844D is also an ideal choice for applications where a high power density and a minimum external component count are of prime importance. Because it offers superior current limit accuracy and over-current protection, the TL2844D is also an ideal choice for industrial or automotive applications that require high safety levels.

Working Principle

The TL2844D operates as a target constant-current output stage while controlling the current through a sense resistor. The current sense resistor is connected between the output voltage rail and the current sense pin of the TL2844D. The TL2844D also provides feedback control to maintain the output voltage at a fixed voltage level. The feedback voltage is monitored on the output voltage feedback pin. An external voltage reference provides the reference for the output voltage. The device also has a soft-start feature to provide an adjustable current limit. This essentially helps prevent the output from overloading during start-up. The TL2844D provides complete protection for its output voltage and current, making it suitable for use in critical automotive, industrial, and aerospace electronics applications.

Conclusion

The TL2844D is a versatile IC that can be used in a variety of DC/DC converter designs, offering superior efficiency and operating safety. It is comprehensive and yet compact, making it ideal for space-constrained designs, such as those found in most portable electronics devices. Furthermore, its feedback control and over-current protection makes it a great choice for automotive, industrial, and aerospace applications.

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