Application Notes

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PT6880 Series

Adjusting the Output Voltage of the PT6880

5-A Excalibur™ Converter Series

The output voltage of the Power Trends PT6880 Excalibur

series of ISRs may be adjusted higher or lower than the

factory trimmed pre-set voltage with the addition of a

allowable adjustment range for each model in the series as

Adjust Up:

An increase in the output voltage is obtained

pins 6, 7 /11-14 (GND).

Adjust Down:

Refer to Figure 3-1 and Table 3-2 for both the placement and

Notes:

location. Place the resistor as close to the ISR as possible.

3. If the remote sense feature is being used, connecting the

Sense) can benefit load regulation.

4. For output voltages above 10Vdc, the maximum output

current must be limited to 4Adc.

5. Adjustments to the output voltage may place additional

limits on the input voltage for the part. The revised limits

must comply with the following requirements.

whichever is higher.

whichever is less.

Figure 3-1

Table 3-1

PT6880 ADJUSTMENT AND FORMULA PARAMETERS

Series Pt #

PT6882

PT6881

PT6883

PT6884

PT6886

PT6885

2.5V

3.3V

5.0V

9.0V

12.0V

15.0V

1.8V

2.2V

3.0V

6.0V

9.0V

10.0V

4.3V

4.7V

6.5V

10.2V

13.6V

17.0V

Ω

Ω

Ω

Ω

Ω)

4.99

4.22

2.49

2.0

2.0

2.0

Ω

Ω

Ω

Ω

Ω)

2.49

4.99

4.99

12.7

12.7

12.7

C

in

+

C

out

+

(R1)

Adj Down

R2

Adjust

Up

Vo

COM

COM

Vin

L

O

A

D

PT6880

15 – 17

1

6, 7,

11 – 14

8 – 10

Vin

V o

GND

Vo(adj)

STBY

4

Vsense

18

also be calculated using the following formulas.

=

k

Ω

=

Where: