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DGP30E48S12

DGP30 SERIES SINGLE OUTPUT

Power-One Inc. 

DGP30 SERIES – SINGLE OUTPUT

DGP30 SERIES APPLICATION NOTES:

External Capacitance Requirements

No external capacitance is required for operation of the DGP30

Series. However, it is recommended that the DGP30 Series use a

capacitor of sufficient ripple current capacity connected across the

input pins if a capacitive input source is farther than 1” from the

converter. To meet the reflected ripple requirements of the

converter, an input impedance of less than 0.05 Ohms from DC to

200KHz is required. External output capacitance is not required

for operation, however it is recommended that 1␮F to 10␮F of

tantalum and 0.001 to 0.1␮F ceramic capacitance be selected for

reduced system noise. Additional output capacitance may be

added for increased filtering, but should not exceed 400␮F.

Negative Outputs

A negative output voltage may be obtained by connecting the

+OUT to circuit ground and connecting -OUT as the negative

output.

Remote ON/OFF Operation

The remote ON/OFF pin may be left floating if this function is

not used. It is recommended to drive this pin with an open

collector arrangement or a relay contact. When the ON/OFF pin

is pulled low with respect to the -INPUT, the converter is placed

in a low power drain state. Since the ON/OFF pin is driven by a 9

volt internal source via a 100K⍀ resistor, the pin should not be

driven by TTL logic. Attempts to drive this circuit with logic

circuits may result in damage to user circuitry.

Output TRIM

The TRIM pin may be used to adjust the output ±5% from the

nominal setting. This function allows adjustment for voltage drops

in the system wiring, as well 5.2 volt outputs for ECL applications.

Figure 1 shows the proper connections to use this function. A

trimpot value of 10K⍀ should be used for the 5 volt output.

A trimpot value of 20K⍀ should be used for 12 and 15 volt outputs.

If the TRIM function is not required the pin may be left floating.

+OUT 5

TRIM 7

-OUT 6

10K LOAD

+OUT 5

TRIM 7

-OUT 6

TRIM

DOWN

TRIM

UP

LOAD

USING TRIMPOT

USING FIXED RESISTORS

Figure 1.

3

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