Dec 7-06

SP7618 Evaluation Board Manual

© 2006 Sipex Corporation

Page 3 of 6

.

Position of DIP-Switches

Number

of pulses

1

2

3

4

5

1

+

+

+

+

2

+

+

+

+

3

+

+

+

4

+

+

+

+

5

+

+

+

6

+

+

+

7

+

+

8

+

+

+

+

9

+

+

+

10

+

+

+

11

+

+

12

+

+

+

13

+

+

14

+

+

15

+

16

+

+

+

+

17

+

+

+

18

+

+

+

19

+

+

20

+

+

+

21

+

+

22

+

+

23

+

24

+

+

+

25

+

+

26

+

+

27

+

28

+

+

29

+

30

+

31

Table 1. Code Table

Note:

“+”- this switch is in ON position

If all switches are in ON position the number of pulses is 256.

2) Powering Up the SP7618 Circuit

The SP7618 Evaluation Board can be powered from a 4.5V power supply or from 3 alkaline cells.

Connect 4.5V source pin with short lead directly to the “Vin” and -4.5V/GND pin to the “GND” posts.

Install shunt S1 to short pins 2-3 (The Evaluation board is delivered by default with shunt in this position. If shunt S1

isn’t installed or short pins 1-2 the driver SP7618 is disabled).

Push the button S2. Driver (U2) will provide to the LED current in respect to dip-switch (U3) position. If the output

current is higher than 266mA (8 pulses), the driver will turn off after 4s to prevent LED damage. Every push on

button S2 turns the driver off/on and sends the CTRL pin a new pulse sequence depending on the dip-switch

position.

Disconnect Evaluation board from power supply to turn it off.