EP1551 Evaluation Board Manual

Rev.01

2/7

Jump Setting

JUMPER

Jump to GND

Jump to MAIN

JP1

All outputs are shut down

OUTSU enabled

JP2

OUTSD shut down

OUTSD enabled

JP3

OUT1 shut down

OUT1 enabled

JP4

LEDOUT shut down

LEDOUT enabled

JP5

OU T3A/OU T3B shut down

OU T3A/OU T3B enabled

JP6

OUT1 set to 5V

OUT1 adjustable

JP7

OUTSD set to 1.5V

OUTSD adjustable

JP8

OUTSU set to 3.35V

OUTSU adjustable

Fixed Output Voltages and Maximum Currents

OUTPUT

VOLTAGE (V)

MAXIMUM

CURRENT (mA)

OUTSU

3.35

500 (Note 1)

OUTSD

1.5

350

OUT1

5

500

LEDOUT+ to LEDOUT

16 (Note 2)

15

OUT3A

15

20

OUT3B

-7.5 (Note 3)

30

Note 1:

If both OUTSU (3.35V) and OUTSD (1.5V) are operating, subtract half the OUTSD (1.5V) load

current from the maximum load capability of OUTSU (3.35V).

Note 2:

With four white LEDs connected in series from LEDOUT+ to LEDOUT-, this output is regulated to

approximately 60mW per LED. With typical white LEDs, this is approximately 16V at 15mA. With

an open circuit, LEDOUT+ is approximately 30V.

Note 3:

Only the 15V output is fed back to the controller regulation point. A small preload (at least 5mA) is

needed for the -7.5V output to be in regulation.