CL88020 datasheet(18/47 Pages) MICROCHIP

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CL88020 120 VAC Offline LED Driver Evaluation Board User’s Guide

DS50002611A-page 18

 2017 Microchip Technology Inc.

2.2

GETTING STARTED

The CL88020 120 VAC Offline LED Driver Evaluation Board is fully tested to evaluate

and demonstrate the CL88020 LED Driver.

Take into account the following recommendations before starting the setup process:

• Place the CL88020 LED Driver Evaluation Board and the LED Load assembly on

a non-conductive surface when connected to the AC line.

• Do not come into contact with any of the two demonstration unit boards while they

are connected to the AC line.

• Disconnect the demo units from the mains before performing any work on any of

them.

• Do not connect instruments having earth-referenced inputs, such as most

oscilloscopes.

• It is suggested that utility power for testing be provide from an AC source with a

floating output, and that differential voltage probes are used.

2.3

SETUP PROCEDURE

Powering the CL88020 120 VAC Offline LED Driver Evaluation Board is easy; the only

connections to be made are from ADM00766 LED driver to the LED Load ADM00767

assembled on a pin-fin heat sink, using the 8-wire flat cable provided, and from the LED

Driver Board to the AC line through a power cord.

Follow these steps:

1. Read the above recommendations and precautions.

2. Connect the CL88020 LED Driver Evaluation Board and the CL88020 LED Load

Board by means of the provided 8-wire flat cable, between J2-J3 connectors. It

is recommended to exercise caution, as the connectors on the flat cable are pro-

tected from being connected incorrectly.

3. Connect power cord on J1 on the LED Driver board, ADM00766. The Input con-

nector J1 is placed on the left side of the LED Driver board, which is marked with

the inscription: AC.

4. Plug the power cord into a 120 VAC outlet and apply 120 VAC ±15%, 60 Hz. While

it is possible for the values to be below this range, it is recommended not to

exceed 144 VAC. In this case the Transient Protection feature is automatically

activated. Line frequency is not critical (50 Hz or 60 Hz).

A variable AC power supply is needed for testing and evaluation in the laboratory. The

power supply requires an output capability of at least 20W and a voltage range from 0

to 150 VAC. This can be obtained also from an autotransformer supplied from the mains

or an electronic AC/AC power supply (for example, the Chroma ATE Inc. 61500 series).

Note:

Auto-transformers do not provide isolation from the utility mains.

WARNING

The CL88020 LED Driver Evaluation Board (ADM00766) and CL88020 LED Load Board

(ADM00767) do NOT provide electrical isolation between the AC line and the lamp cir-

cuitry. Dangerous voltages are present when connected to the AC line. Exercise

caution!

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