MCP1630_11 datasheet(13/34 Pages) MICROCHIP

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MCP1630 SEPIC AUTOMOTIVE LED

DRIVER REFERENCE DESIGN

DS51955A-page 13

Chapter 2. Installation and Operation

2.1

GETTING STARTED

The MCP1630 Sepic Automotive LED Driver Reference Design is fully assembled and

tested. The board requires the use of an external input voltage source (9V to 16V) and

an external LED load, provided by Microchip.

2.1.1

Additional Tools Required for Operation

1. A DC power supply, a bench supply that can produce 12V, 2.5A, is recommended

to operate the board at the full rated power.

2. An oscilloscope and/or a multi-meter to observe the waveforms and measure the

electrical parameters (optional).

2.2

SETUP PROCEDURE

To operate the MCP1630 Sepic Automotive LED Driver Reference Design, the

following steps must be completed:

1. Attach an LED load (or dummy load) to the Output Connector J3 (observe the

polarity).

2. Attach the push button to the J1 header (between Pins 3 and 4 is optional).

3. Connect a power supply to the Input Connector J2 (observe the polarity).

Detailed instructions are provided below for each step.

2.2.1

Demo Board Output Current Configuration

The board is configured to deliver a maximum of 350 mA to the LEDs’ load. UVLO and

OVLO thresholds are set to 8V and 17V, respectively. The maximum output voltage is

set to be approximately 55V.

2.2.2

Connecting the Load

A string of up to sixteen white LEDs (1W each) can be powered by this board. The

LED's string must be mounted on an appropriate heat sink to keep the maximum

junction temperature at safe level (consult the LED data sheet for details). The

maximum current delivered by the board to the LED's string is set to 350mA and the

maximum output voltage is 55V.

The LED's string can be replaced by a resistor of 150Ω and 20W dissipated power

(dummy load). In this case, the power delivered to the load will be about 18W.

Connect the LEDs’ string to the J3 connector. It is very important to use the correct

polarity (see Figure 2-1).

WARNING

Please observe the polarity for all steps to avoid board damage.

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