DC968A-B

Series:	--
Part Status:	Active
Main Purpose:	DC/DC, Step Down
Outputs and Type:	1, Isolated
Voltage - Output:	5V
Current - Output:	20A
Voltage - Input:	18 V ~ 36 V
Regulator Topology:	Buck
Frequency - Switching:	300kHz
Board Type:	Fully Populated
Supplied Contents:	Board(s)
Utilized IC / Part:	LT1952-1, LT4430, LTC3900
Base Part Number:	LT1952

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DC968A-B Evaluation Board - DC/DC & AC/DC (Off-Line) SMPS

The DC968A-B evaluation board is special in that it is designed specifically for evaluating and comparing off-line DC/DC and AC/DC SMPS (switched mode power supply) solutions for different applications. It is an ideal evaluation tool to assess the performance of off-line power supplies. The board is composed of a DC968A-B DC/DC converter and a MCP1642 SMPS regulator. The SMPS controller uses a high efficiency primary-side regulation (PSR) technology, which eliminates the need for secondary-side rectification and regulation components. This results in a cost effective, low power consumption and high power density solution. The primary features of the evaluation board are as follows:

• Wide input voltage range compatible for both AC and DC inputs
• A high efficiency DC/DC converters as a power source
• An integrated MCP1642 SPI-controlled H-Bridge
• Active load-switch control
• Accurate measurement of peak current
• High precision voltage/current measurement
• User programming of power parameters
• Integrated EEPROM of 128Kx8 bits

The DC968A-B evaluation board offers the flexibility to evaluate and compare various off-line SMPS solutions in different applications. Several key parameters including maximum output power, efficiency, peak current and voltage can be programmed and measured with the evaluation board. The working principle of the board is based on the primary-side regulation (PSR) technology. It utilizes a fully integrated, low power concept to achieve high power density. The DC968A-B board has an ultra-low noise DC/DC converter to provide clean power and a high efficiency MCP1642 regulator to draw power from the DC supply. A bi-directional H-bridge gate driver is used to control the switching power transistor for efficient power transfer from the DC to the AC output. The output power is determined by the peak current signal provided by the low side current monitor and is limited by the user programmable peak current limit. The board supports a wide input voltage range of 3V to 60V and has an output power rating of up to 500W. The board is designed to provide excellent performance and reliability with minimum external components. It is equipped with a graphical user interface (GUI) to configure the power supply parameters and to view the waveforms and key parameters. This graphical user interface allows the user to quickly adjust and optimize the output power for their specific application. Overall, the DC968A-B evaluation board is a versatile tool for assessing the performance of off-line power supplies and comparing different solutions in different applications. The board provides a low power, high power density solution with a wide input voltage range and a highly efficient DC/DC converter. The integrated MCP1642 H-Bridge regulator and graphical user interface provide the flexibility to configure and measure key parameters. The board is an excellent tool to evaluate different SMPS solutions and reduce time-to-market with high power density solutions.

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