PT4112A

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

DC-DC converters provide a reliable, efficient and cost-effective way to convert AC from a wall outlet or other power source into DC, which can then be used to power electronic devices. The PT4112A is a high-power, high-efficiency, programmable, step-down DC-DC converter designed to meet the needs of a wide range of applications, including telecommunications, automotive, embedded computing, industrial, medical, and consumer electronics. This article will examine the application field and working principle of the PT4112A.

Features of PT4112A

The PT4112A offers several features that make it well-suited for a variety of applications. It boasts a wide 4.5V to 19.2V input voltage range, an adjustable output voltage setting of 0.7 to 36V, and a maximum output current of 3A. The PT4112A also has a high efficiency of up to 96.5%, low quiescent current of 30uA, and an output voltage accuracy of 0.5%. It comes with an onboard 135kHz oscillator, allowing for excellent noise immunity and output ripple performance.

Another feature of the PT4112A that makes it an ideal choice for industrial applications is the 0.8V undervoltage lockout (UVLO) threshold. This built-in UVLO can prevent associated components from being damaged in the event of an abrupt voltage change. Additionally, the PT4112A features integrated soft-start and current-limit protection to help protect it from potential inrush currents. Furthermore, the device is available in a highly compact, 10-pin TSOP form factor, which makes it well-suited for space-limited designs.

Application Fields of PT4112A

The PT4112A can be used in a variety of applications, including telecommunications, automobile, and embedded computing. In the telecommunications field, the PT4112A can be used as a DC-DC converter for powering telecommunication equipment such as base stations and repeaters, as well as for controlling remote devices. In the automotive industry, the PT4112A can be used to power battery management systems, infotainment systems, and fuel injection systems. In embedded computing applications, the PT4112A can be used to power memory, processors, and other electronic components. Additionally, the device is suitable for powering medical instruments, LED lighting, consumer electronics, and other industrial applications.

Working Principle of PT4112A

The PT4112A is a programmable, step-down DC-DC converter with a synchronous buck topology. It uses an integrated power MOSFET, the LM241, as its main switching element. The LM241 is capable of supporting up to 3A of continuous current in a wide operating temperature range from -40℃ to +125℃. The PT4112A also utilizes a dual cascade amplifier architecture and a two-stage charge pump to minimize power losses. Additionally, it comes with an inbuilt phase-locked loop (PLL) for precise control of the voltage and current for consistent and reliable performance.

The PT4112A is controlled by an integrated high-voltage regulator, which monitors the output voltage and adjusts the duty cycle of the LM241 in order to regulate the output voltage. The operating frequency of the LM241 is set by an external resistor. The PT4112A also features an overvoltage protection (OVP) circuit to protect downstream components from any overvoltage condition. Additionally, the device includes an oscillator for providing synchronization signal to a wide range of voltage regulators.

Conclusion

The PT4112A is a high-power, high-efficiency programmable step-down DC-DC converter. It provides a wide input voltage range of 4.5V to 19.2V and an adjustable output voltage range of 0.7V to 36V, making it well-suited for a variety of applications including telecommunications, automotive, embedded computing, and medical. It features a 0.8V undervoltage lockout (UVLO) threshold, integrated soft-start and current-limit protection, and its output voltage accuracy is 0.5%. The device utilizes a synchronous buck topology, which employs an integrated power MOSFET as its main switching element. It also includes a dual cascade amplifier architecture and a two-stage charge pump to minimize power losses. Furthermore, the PT4112A utilizes an integrated high-voltage regulator, which monitors the output voltage and adjusts the duty cycle of the LM241 for precise control. Combined with its small form factor, these features make the PT4112A an ideal choice for a wide range of industrial applications.

The specific data is subject to PDF, and the above content is for reference