JCA0448S03

Current - Output (Max):	1.22A
Size / Dimension:	1.00" L x 0.80" W x 0.39" H (25.4mm x 20.3mm x 10.0mm)
Package / Case:	24-DIP Module, 7 Leads
Mounting Type:	Through Hole
Efficiency:	82%
Operating Temperature:	-40°C ~ 100°C
Features:	OCP, OVP, SCP, UVLO
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	4W
Series:	JCA
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	3.3V
Voltage - Input (Max):	75V
Voltage - Input (Min):	36V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active
Packaging:	Tube

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DC DC Converters

DC DC converters are electronic devices used to convert a direct current (DC) output of one voltage level into an equivalent DC output of a different voltage level. They are typically used to power electronic devices from a larger power source or to increase the power of an existing system. An example of a DC-DC converter is the JCA0448S03. This article will explain the application field and working principle of the converter.The JCA0448S03 DC-DC converter is most commonly used in automotive applications. It is a 4 Amp, isolated, step-down DC-DC converter with a high-efficiency design, making it an appealing choice for automotive industries that require power solutions with minimal energy loss. The converter features a 4:1 input voltage range of 9-36 Volts, adjustable output voltage from 2v to 30v, and a 1.2MHz high-speed, discontinuous current-mode (DCM) regulator capable of providing a high-level of efficiency, while maintaining low noise output.In addition to its automotive application, the JCA0448S03 is also employed in industrial, transportation, and telecommunications applications. It is also suitable for use in home electric appliances such as refrigerators and air conditioners. The DC-DC converter is able to provide reliable and clean power to various applications, even in potentially hazardous environments, such as those characterized by high vibration and electromagnetic noise.The working principle of the JCA0448S03 DC-DC converter is based on the concept of average inductor-current-mode control. The input voltage is first reduced to a lower level and then converted back into a higher voltage. This is done by passing the input voltage through a semiconductor switch called a metal-oxide-semiconductor field-effect transistor (MOSFET). The voltage conversion is managed by the MOSFET, which opens and closes on an average current basis.The converter operates by switching the MOSFET on or off based on the measured current. When the MOSFET is on, current enters the inductor and then flows to the output. When the MOSFET is off, the current is stored in the inductor. This process is known as “charge pump” and it allows for a high level of efficiency and robust operation.The working principle of the JCA0448S03 DC-DC converter also utilizes a low voltage disconnect (LVD). This feature allows for the automatic shut off of the converter in the event of a drop in the input voltage. This helps to protect the converter from damage as well as ensuring efficient operation and longer battery life in the event of a power shortage.To summarize, the JCA0448S03 DC-DC converter is a 4 Amp, isolated step-down device. It is most often used in automotive applications, as well as in industrial, transportation, and telecommunication applications. Its working principle is based on average inductor-current-mode control and utilizes a low voltage disconnect feature. The DC-DC converter is capable of providing high efficiency with low noise output, while also protecting against power shortages.

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