PT4825N

Current - Output (Max):	8A, 6A, 6A
Base Part Number:	PT4825
Size / Dimension:	--
Package / Case:	21-SIP Module
Mounting Type:	Through Hole
Efficiency:	86%
Operating Temperature:	-40°C ~ 85°C
Features:	UVLO
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	35W
Series:	Excalibur™ PT4820
Voltage - Output 3:	1.2V
Voltage - Output 2:	1.5V
Voltage - Output 1:	3.3V
Voltage - Input (Max):	75V
Voltage - Input (Min):	36V
Number of Outputs:	3
Type:	Isolated Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC Converters

DC-DC converters create DC power from either the AC mains or from other DC sources. They are widely used to power a variety of electronic devices, from small consumer appliances, such as clocks, radios, and telephones, to more advanced systems such as computer networks, communication systems, and robotics. One of the most popular DC-DC converters for industrial use is the PT4825N. This article will provide an overview of the PT4825N’s application field and working principle.

Application Field

The PT4825N is designed for applications that require high-efficiency DC-DC conversion, including, but not limited to, motor control, power distribution, instrumentation, and industrial automation. It is also used for providing intermediate power in distributed control systems, server applications, and a variety of special equipment. Additionally, it provides voltage regulation in automotive, marine, and industrial environments. The PT4825N is designed to be a reliable, highly efficient converter that meets the challenging requirements of modern day electronics. It is designed to operate efficiently under varying conditions and current levels, allowing it to reliably provide power for various applications. In addition, the PT4825N can support high process temperatures up to 100°C, making it an ideal choice for use in extreme temperatures. Its low output ripple and startup voltage ensure a clean, stable power supply.

Working Principle

The PT4825N is a DC-DC converter that converts AC or DC power into DC power. It operates as an efficient, low-noise switch-mode power supply, making it suitable for a variety of applications. The PT4825N is designed with a buck-boost topology, which enables it to take either a low-voltage or high-voltage input and output a regulated low-voltage or high-voltage DC power rail. A buck-boost converter consists of two sets of transistors, an inductor, and a capacitor. The transistors are used to control the flow of current from the input to the output, and the inductor and capacitor are used to store energy and reduce voltage spikes. At the inputs, a rectifier is used to convert AC power to DC power. On the outputs, two transistors, an NPN and a PNP, are used to control the current. The NPN transistor allows current to flow in the first half of the switching cycle, and the PNP transistor allows current to flow in the second half of the switching cycle. When the NPN transistor is turned on, current can flow into the inductor, and when the PNP transistor is turned off, current can flow out of the inductor, creating the DC output voltage.The PT4825N is also designed with two separate feedback loops. The first loop compares the output voltage to the reference voltage, and the second loop monitors the input voltage. The output voltage is regulated by adjusting the duty cycle of the transistor switches. As the output voltage increases, the duty cycle of the NPN transistor is reduced, allowing current to flow out of the inductor more slowly. Similarly, as the input voltage increases, the duty cycle of the PNP transistor is increased to allow more current to flow out of the inductor faster.

Conclusion

The PT4825N is a highly efficient DC-DC converter designed for applications that require high-efficiency DC-DC conversion. It can take from either a low-voltage or high-voltage input and output a regulated low-voltage or high-voltage DC power rail. The PT4825N is designed to operate efficiently under varying conditions and current levels, making it an ideal choice for a variety of applications. It is designed with a buck-boost topology and two separate feedback loops, allowing it to accurately monitor and regulate both the output and input voltages for optimal performance.

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