EXTERNAL CAPACITOR

REMOTE ON/OFF

REMOTE SENSE

PB-4

REV.: 0/2017

www.recom-power.com

DC/DC Converter

RPA100H-RUW

Series

+Vout

+Vin

-Vin

-Vout

(GND)

+Sense

RW1

RW2

R1

R2

-Sense

Trim

R1

-Vin

+Vin

+Vout

-Vout

CTRL

C1

Q1

R1

Ext. Cap.

+Vout

-Vout

-Vin

Hold Up Circuit

D1

C1

C2

+Vin

+Vout

-Vout

UVLO

-Vin

R1

R1

-Vin

+Vin

+Vout

-Vout

CTRL

C1

Q1

R1

Ext. Cap.

+Vout

-Vout

-Vin

Hold Up Circuit

D1

C1

C2

+Vin

+Vout

-Vout

UVLO

-Vin

R1

RW1 ... wire losses +

RW2 ... wire losses -

R1 ... trim up resistor

R2 ... trim down resistor

The output voltage can be adjusted by both trim and remote sense. The

maximum combined adjustment range is ±10%. Derate the maximum

output power if using the trim or sense function to increase the output

voltage.

Remote on/off can be controlled by an external voltage or transistor between the CTRL terminal

and the Vin(-) terminal.

For negative logic if the remote on/off feature is not used, short the on/off pin to Vin(-).

For positive logic if the remote on/off feature is not used, leave the on/off pin floating.

C1

24Vin

36Vin

48Vin

72Vin

96Vin

110Vin

For 10ms

2300µF

2300µF

2300µF

2300µF

1200µF

800µF

For 30ms

6900µF

6900µF

6900µF

6900µF

3600µF

2400µF

RPA100H-11012SRUW

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

Volts

R

4530

2320

1540

1150

931

787

681

604

536

487

kOhms

Trim up:

RPA100H-11024SRUW

Trim up

1

2

3

4

5

6

7

8

9

10

%

Vout =

24.24

24.48

24.72

24.96

25.20

25.44

25.68

25.92

26.16

26.40

Volts

R

9530

4870

3240

2490

2000

1690

1430

1270

1150

1050

kOhms

Trim down RPA100H series

Trim down

1

2

3

4

5

6

7

8

9

10

%

R

499

243

162

118

90.9

75

63.4

53.6

46.4

41.2

kOhms

Trim down

11

12

13

14

15

16

17

18

19

20

%

R

36.5

32.4

28.7

26.1

23.7

22.1

20

18.2

16.5

15.4

kOhms

A 240µF/200V capacitor (C2) is required for normal operation.

To meet power supply interruptions, an external circuit comprised of a capacitor (C1),

a 100R 10W resistor (R1) and a FX2000D diode (D1) is required.