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REV.: 0/2018

PB-4

DC/DC Converter

RP40Q-RUW

Series

OUTPUT VOLTAGE TRIMMING

continued on next page

RP40Q-xx05SRW

RP40Q-xx15SRW

RP40Q-xx12SRW

Trim up

1

2

3

4

5

6

7

8

9

10

[%]

Vout

5.05

5.10

5.15

5.20

5.25

5.30

5.35

5.4

5.45

5.50

[VDC]

R

1M58

806k

536k

402k

324k

247k

237k

205k

187k

169k

[

W]

Trim up

1

2

3

4

5

6

7

8

9

10

[%]

Vout

15.15

15.30

15.45

15.60

15.75

15.90

16.05

16.20

16.35

16.50

[VDC]

R

5M76

2M94

1M96

1M47

1M21

1M02

866k

768k

698k

619k

[

W]

Trim up

1

2

3

4

5

6

7

8

9

10

[%]

Vout

12.12

12.24

12.36

12.48

12.60

12.72

12.84

12.96

13.08

13.20

[VDC]

R

4M53

2M26

1M54

1M15

931k

787k

681k

604k

536k

487k

[

W]

Output Voltage Trimming

It allows the user to increase or decrease the output voltage of the module. This is accomplished by connecting an external resistor between the Trim pin and

either the +Sense or -Sense pins. With an external resistor between the Trim and +Sense pin, the output voltage increases. With an external resistor between

the Trim and -Sense pin, the output voltage decreases. The external Trim resistor needs to be at least 1/8W of rated. The values for trim resistors shown in trim

tables below are according to standard E96 values; therefore, the specified voltage may slightly vary.

Trim

+Sense

-Sense

Trim

Trim up

Trim down

Vout

nom

R

1

R

2

R

3

V

ref

5VDC

10k2

W

511k

W

5k11

1.225VDC

12VDC

15VDC

24VDC

48VDC

Practical Example RP60Q-xx05SRW +10% / -10%

R

R

R

5k11 x 5 x (100 + 10)

-

(10k2 x 10) + 511k

=

168k

W

1.225 x 10

10

R

R

-

(R

V

DVout

R

R

2

- R

1

DVout

R

511k

- 10k2 =

40k9

W

10

Vout

nom

= nominal output voltage

[VDC]

DVout

= output voltage change

[%]

V

ref

= reference voltage

[VDC]

R

up

= trim up resistor

[

W]

R

down

= trim down resistor

[

W]

R

= internal resistors

[

W]