Microchip Technology MCP1633 SEPIC, Руководство пользователя

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MCP1633 SEPIC
LED DRIVER
DEMONSTRATION BOARD
USER’S GUIDE

2020 Microchip Technology Inc. DS50002945A-page 13
Chapter 2. Installation and Operation
2.1 GETTING STARTED
The MCP1633 SEPIC LED Driver Demonstration Board is fully assembled and tested.
The board requires the use of an external input voltage source (+7V to +18V) and the
LED load (provided).
2.1.1 Necessary Instruments and Tools
• Adjustable DC power supply with 0V-24V/3 ADC range output capability
• Digital oscilloscope with a minimum bandwidth of 50 MHz
• Signal generator
• Digital voltmeter/ammeter
• Wires for connections
2.1.2 Setup Procedure
To operate the board, follow the next steps:
1. Connect a power supply to the input connector J; the positive (+) and negative
(-) connector pins are marked on the board’s silkscreen.
2. Attach the jumper to the load connector in order to connect the LED from the
bottom side.
3. Connect the jumper on the INT position to use the local dimming signal (provided
by the PIC12F1822 microcontroller).
4. The DC voltage supplied by the adjustable DC power supply must be between
7V and 18V.
5. Turn on the power supply.
6. Rotate the potentiometer R25 to adjust the dimming level from 10-100%.
2.1.3 Board Testing
Figure 2-1 shows the typical testing setup. Table 2-1 shows all the available test points
on the MCP1633 SEPIC LED Driver Demonstration Board.
Various instruments can be connected at the listed test points to evaluate the
parameters of the converter. The typical performance data, curves and waveforms are
presented in
Appendix C. “Typical Performance Data, Curves and Waveforms” .