E48SC12008NRFA datasheet(10/17 Pages) DELTA

Part #	E48SC12008NRFA

Description	Standard footprint

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Manufacturer	DELTA [Delta Electronics, Inc.]

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DS_E48SC12008_09142016

10

FEATURES DESCRIPTIONS (CON.)

Output Voltage Adjustment (TRIM)

To increase or decrease the output voltage set point,

the modules may be connected with an external

resistor between the TRIM pin and either

the

SENSE(+) or SENSE(-). The TRIM pin should be left

open if this feature is not used.

Figure 16: Circuit configuration for trim-down (decrease

output voltage)

If the external resistor is connected between the TRIM

and SENSE (-) pins, the output voltage set point

decreases (Fig. 16). The external resistor value

required to obtain a percentage of output voltage

change △% is defined as:

 











K

down

Rtrim

2

.

10

511

Ex. When Trim-down -10%(12V×0.9=10.8V)

 











K

down

Rtrim

9

.

40

2

.

10

511

Figure 17: Circuit configuration for trim-up (increase output

voltage)

If the external resistor is connected between the TRIM

and SENSE (+) the output voltage set point increases

(Fig. 17). The external resistor value required to obtain

a percentage output voltage change △% is defined

as:





















K

up

Rtrim

2

.

10

511

1.225

)

(100

Vo

11

.

5

Ex. When Trim-up +10%(12V×1.1=13.2V)





















K

up

Rtrim

329

.

489

2

.

10

511

10

1.225

)

10

(100

12

11

.

5

The output voltage can be increased by both the remote

sense and the trim, however the maximum increase is

the larger of either the remote sense or the trim, not the

sum of both.

When using remote sense and trim, the output voltage

of the module is usually increased, which increase the

output power of the module with the same output

current.

Care should be taken to ensure that the maximum

output power of the module remains at or below the

maximum rated power.

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