EXTERNAL CAPACITOR

REMOTE ON/OFF

REMOTE SENSE

PB-4

REV.: 0/2017

www.recom-power.com

DC/DC Converter

RPA200H-RUW

Series

Trim down RPA200H 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

+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

RPA200H-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

RPA200H-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:

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.

C1

24Vin

36Vin

48Vin

72Vin

96Vin

110Vin

For 10ms

2300µF

2300µF

2300µF

2300µF

1200µF

800µF

For 30ms

6900µF

6900µF

6900µF

6900µF

3600µF

2400µF

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.