PT4581A

Current - Output (Max):	8A
Base Part Number:	PT4581
Size / Dimension:	3.00" L x 1.19" W x 0.50" H (76.2mm x 30.2mm x 12.7mm)
Package / Case:	19-SIP Module
Mounting Type:	Through Hole, Right Angle
Efficiency:	80%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	30W
Series:	Excalibur™ PT4580
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	3.3V
Voltage - Input (Max):	60V
Voltage - Input (Min):	18V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC converters are one of the most important power electronic devices used to convert direct current (DC) from one value to another. The PT4581A DC DC converter is a switching mode power supply (SMPS) controller IC designed to be used as an adjustable and high-efficiency DC DC converter. This IC provides precise control, improved efficiency, and features flexible pulse-width modulation (PWM) waveforms for controlling DC to DC conversion.The PT4581A DC DC converter is designed as a voltage-mode PWM controller with an internal power mosfet to provide excellent long-term stability, provide high efficiency and reduce component count of the converter. This IC features adjustable peak and valley current limit, programmable soft-start, and adjustable soft-stop. It also provides logic level compatible enable, reset, and power foldback functions. The PT4581A DC DC converter operates from an input voltage of 5V to 24V and is available in an MSOP-8 package.The main application fields of the PT4581A DC DC converter are in laptops and other portable devices, such as PDAs, medical instruments, and communication and office equipment. The PT4581A is suitable for switching applications, including those that are battery powered, such as laptop computers, AC/DC adapters, and other power supplies. Its high-efficiency performance also makes it a great choice for renewable energy applications, such as solar panel power supplies, wind power supplies, and wave power supplies.The working principle of the PT4581A DC DC converter is based on its voltage-mode PWM control circuit. The controller includes two main components: pulse-width-modulation (PWM) control circuit and internal power MOSFET. The PWM control circuit provides precise control by utilizing an internal error amplifier which controls the duty cycle of the PWM circuit in order to regulate the output voltage of the converter. The internal power MOSFET is used to convert the input voltage into the desired output voltage through switching regulation.The PT4581A DC DC converter provides improved efficiency and stability by using a constant-frequency hysteretic current-mode (FCM) control technique. The FCM technique allows for a high switching frequency and low on-time, resulting in reduced power losses and improved efficiency. This technique also reduces the effects of temperature drift and improves overall stability. To ensure a stable output voltage, the PT4581A DC DC converter also features adjustable peak and valley current limit, programmable soft-start, and adjustable soft-stop. It also provides logic level-compatible enable, reset, and power foldback functions.The PT4581A is a highly integrated DC-DC converter, thereby simplifying the power supply design. It has the capability to reduce the number of external components needed to create a stable output voltage. In addition, its high-efficiency performance makes it the ideal choice for multiple applications, such as laptop computers, AC/DC adapters, renewable energy power supplies, and general power supplies.

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