Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com

©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06

POWER PRODUCTS

GMDC12V08

DORADO MV DC/DC CONVERTERS

24V Input – 12VDC – 8A Output

page 5

Protection and Control

Thermal Shutdown

The printed circuit board temperature is measured using a

semiconductor sensor. If the maximum rated temperature

is exceeded, the converter is latched off. To re-enable the

converter requires cycling the ON/OFF pin or power to the

converter. If non-latching is required, consult factory.

Remote Sense

The output voltage is regulated at the point where the

sense pins connect to the power output pins. Total sense

compensation should not exceed 0.4V or 10% of Vout,

whichever is greater.

Safety

An external input fuse must always be used to meet these

safety requirements.

External Output Trimming

Trim

To trim the output voltage higher, connect the required trim

resistor from the Trim pin to the +Sense pin. To trim the output

voltage lower, connect the required trim resistor from the Trim

pin to the –Sense pin. See the diagrams at right.

Trim-down

+Sense

Trim

–Sense

Trim

Up

Trim

Down

10K

Trimpot

Increase in Output Voltage (%)

10000

1000

100

0

1

2

3

4

5

6

7

8

9

10

12.0V Trim-up

Decrease in Output Voltage (%)

1000

100

10

0

1

2

3

4

5

6

7

8

9

10

Trim-down

R

TRIM-UP

=

12(100+

∆%) _ (100+2∆%)

5.11k

Ω

1.25

∆%

∆%

{

}

R

TRIM-DOWN

=

100 _ 2

5.11k

Ω

∆%

{

}

Trim-up