Electrical specifications and reference design board

AN2590

10/17

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Electrical specifications and reference design board

3.1

Electrical specification

s

The electrical specifications of the reference design board are shown in Table 1.

3.2

PCB layout view

The PCB layout of the board is shown below. Figure 10 shows the PCB top side view and

Figure 11 shows the PCB bottom side view.

Table 1.

1.

The test under AC input 220 V/50 Hz at room temperature

Parameter

Value

Unit

Min.

Typical

Max.

AC input (operating range)

180

220

260

V

Line frequency

~

50

~

Hz

Load (3U compact florescent lamp)

~

20

~

W

Rated switching frequency (pin14 of L6974D)

~

44

~

kHz

Minimum dimmable lamp power

~

2.7

3

W

Maximum dimmable lamp power

16.4

16.6

~

W

Lamp power without connection to triac dimmer

19.25

20

20.75

W

Power factor

0.9

0.92

~

~

Figure 10.

PCB top-side view

Figure 11.

PCB bottom-side view