PT4122A

Current - Output (Max):	4A
Base Part Number:	PT4122
Size / Dimension:	1.73" L x 1.52" W x 0.33" H (43.9mm x 38.6mm x 8.5mm)
Package / Case:	6-DIP Module
Mounting Type:	Through Hole, Right Angle
Efficiency:	82%
Operating Temperature:	-40°C ~ 85°C
Features:	UVLO
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	20W
Series:	PT4120
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	5V
Voltage - Input (Max):	75V
Voltage - Input (Min):	36V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Obsolete
Packaging:	Tray

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PT4122A is a synchronous step-down DC/DC converter integrated with 40V rated voltage and 3A current. It can achieve a wide range of input voltage from 8V to 40V and an adjustable output voltage from 0.8V to 18V. The device is designed with advanced features such as active output voltage limiting, ultra-low quiescent current and soft-start power up sequencing.The PT4122A is mainly used for low power applications such as cell phones, notebooks, consumer electronics, automotive, industrial and communications applications. In these applications, it can be used to provide isolated, regulated DC output voltage from a single or multiple outputs. The output voltage can be easily adjusted by an external voltage divider or using the integrated control pin. The output voltage accuracy is ±4%, and the output current is limited to 3A. The device also includes an active output voltage limiting circuit, which ensures that the output current remains constant even if the output voltage is set too high.The working principle of PT4122A DC/DC converter is quite simple yet effective. It is based on the Buck converter topology and mainly comprises of an input rectifier, an inductor, a high-frequency switch, a driver, a rectifier diode, an output capacitance, and a control circuit. When operating the converter, the electrical energy stored in the input rectifier is transferred to the output through the switching action of the high-frequency switch and the rectifier diode. The control circuit is responsible for controlling the ON/ OFF of the switch in order to maintain a constant output voltage.The efficiency of the PT4122A is very high and it can operate at very high frequencies, which makes it one of the best performing DC/DC converters in the market. It is also very efficient in terms of heat dissipation, which makes it ideal for highly temperature sensitive environments. In addition, it has a wide range of operating temperatures, from -40°C to 125°C. This makes it suitable for applications such as automotive and industrial environments, where extreme temperatures are common.Overall, the PT4122A is an excellent DC/DC converter for a wide range of applications. It offers high efficiency and reliable performance, and can be easily integrated into any system. It also offers a wide input voltage range, allowing it to be used in various environments. With its advanced features, the PT4122A is becoming more and more popular in the industry, and is sure to be highly sought after in the future.

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