DC480A-D

Series:	--
Part Status:	Active
Main Purpose:	DC/DC, Step Down
Outputs and Type:	1, Non-Isolated
Voltage - Output:	1.8V
Current - Output:	300mA
Voltage - Input:	2.5 V ~ 5.5 V
Regulator Topology:	Buck
Frequency - Switching:	1.5MHz
Board Type:	Fully Populated
Supplied Contents:	Board(s)
Utilized IC / Part:	LTC3405A-1.8
Base Part Number:	LTC3405

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DC480A-D application field and working principleDC480A-D is an evaluation board specially developed for testing DC/DC and AC/DC off-line switch mode power supplies (SMPS). It has wide-range applications in industrial, telecoms, audio, automotive and other fields and can be used for design and development of small-power transformers and power supplies. The working principle of the board is based on the basic operations of topology-flow.Topology-flow involves the three basic operations of power conversion cycle that are buck, boost and inverting. The DC480A-D board combines these operations to manufacture DC/DC or AC/DC SMPS. It consists of a power transformer with several taps, a rectifier bridge, power switching transistors, an opto-isolator, a voltage regulator IC and a load capacitor.The working sequence of the board is as follows. Initially, the unidirectional AC voltage is rectified into a steady DC voltage. The rectified voltage is then fed to a power transistor which is in high frequency switching mode. The transistor is constantly switched between conducting and non-conducting states by the open-loop controller which monitors the peak currents at the PFC transistor and the input voltage.The alternating current flowing through the power transformer is then rectified to obtain the output voltage. The output voltage is then regulated to the required DC voltage level. The opto-isolator isolates the controller circuit from the power transformer. The regulated output voltage is then fed to the load through the load capacitor and the output voltage will be maintained constant even if the load current is changing.The DC480A-D evaluation board is easy to set up and use. It is compatible with all popular systems and components and has a wide range of features. It has a low standby power mode to enable energy-saving, and its efficiency is up to 90%. The board is also equipped with an LCD to display the real-time values of the current and voltage, as well as the temperature conditions. Furthermore, the board is highly reliable and provides protection against overcurrent, overvoltage, undervoltage and overheating.Overall, the DC480A-D evaluation board is a great choice for developing and testing DC/DC and AC/DC off-line switch mode power supplies. Its wide range of features and high efficiency makes it suitable for a wide range of applications. The board is also equipped with a display to monitor the performance and temperature conditions, making it easy to use and operate.

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