PT4143CT

Current - Output (Max):	1.6A
Base Part Number:	PT4143
Size / Dimension:	1.67" L x 1.48" W x 0.34" H (42.4mm x 37.6mm x 8.6mm)
Package / Case:	8-SMD Module, 6 Leads, Gull Wing
Mounting Type:	Surface Mount
Efficiency:	83%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	20W
Series:	PT4140
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	12V
Voltage - Input (Max):	40V
Voltage - Input (Min):	18V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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DC DC converters are an important type of power supply and are used in numerous applications where energy is needed to perform a job. As technology improves over the years, the advances made in the field of power electronics have allowed easier, more efficient and more reliable DC DC converters to be developed. The PT4143CT is one such device, and this article will discuss its application field and working principle.The PT4143CT is a highly efficient, low-power synchronous step-down DC DC converter that is suitable for powering small microcontrollers and other low-power ICs, such as digital logic and analog devices. It is designed to have low output voltage ripple and low output capacitor stress, providing a stable voltage across the load, even for high speed applications. The maximum output current of the PT4143CT is up to 1A and it can support a wide range of input voltages, from 3V to 5.5V, making it ideal for multiple voltage applications.The PT4143CT utilizes a synchronous step down topology, which consists of an inductor, two power switches and an output capacitor. It does not require a large output capacitor or any additional control circuitry, and it can be easily configured to any desired output voltage regulation. It operates at a fixed frequency of 400kHz, making it one of the highest frequency DC DC converters available and allowing it to achieve impressive efficiency levels of up to 95%. Its fixed switching frequency also helps it operate in the highest load currents and still maintain output noise levels that are lower than most competitive solutions.The working principle of the PT4143CT DC DC converter is quite simple and involves the power switches being switched on and off to regulate the flow of current through the inductor and charge or discharge the output capacitor, thereby regulating the supply voltage as needed. The two power switches are connected in a complementary arrangement and are actuated using logic level signals generated by the power IC itself. The ON and OFF times of the two power switches determine the output voltage, allowing for easy and precise control of the output voltage. Using a combination of the two power switches, as well as a constant current source, the power IC controls the output voltage by detecting the voltage on the output capacitor and then adjusting the ON and OFF times of the two power switches accordingly. During the ON time, the inductor charges the output capacitor and during the OFF time, the energy stored in the inductor is transferred to the output capacitor. This allows for the output voltage to remain steady, independent of the load current.The PT4143CT has been designed to work with a wide range of input voltages, making it ideal for multiple voltage applications, such as battery operated devices or automotive applications. It provides a simple, cost effective and highly efficient DC DC converter for small applications. The combination of its wide range of input voltages, variable output voltage, small size and high efficiency makes it an attractive choice for both industrial and consumer applications.

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