E48SR12007NRFH Просмотр технического описания (PDF) - Delta Electronics, Inc.

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E48SR12007NRFH

Delphi Series E48SR12007, 84W Eighth Brick DC/DC Power Modules: 48V in, 12V/7A out

Delta Electronics, Inc. 

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 19: Circuit configuration for trim-up (increase output

voltage)

Figure 18: 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. 18). The external resistor value required

to obtain a percentage of output voltage change △% is

defined as:

Rtrim

−

down

=

⎡ 511

⎢⎣ ∆

− 10.22⎥⎦⎤(KΩ )

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

Rtrim

−

down

=

⎡ 511

⎢⎣ 10

−

10

.22

⎤

⎥⎦

(K

Ω

)

=

40.88(KΩ )

If the external resistor is connected between the TRIM

and SENSE (+), the output voltage set point increases

(Fig. 19). The external resistor value required obtaining a

percentage output voltage change △% is defined as:

Rtrim − up = 5.11×Vo × (100 + ∆) − 511 −10.22(KΩ)

1.225 × ∆

∆

Ex. When Trim-up +10%(12 V×1.1=13.2V)

Rtrim − up = 5.11×12 × (100 +10) − 511 −10.22 = 489.3(KΩ)

1.225 ×10

10

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 increases the

power output 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.

E48SR12007_03022007

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