Datasheet

DC/DC Converter
Specifications (measured @ Ta= 25°C, nominal input voltage, full load and after warm-up)
continued on next page
www.recom-power.com
REV.: 1/2019 MED-4
Trim up
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
12.12 12.24 12.36 12.48 12.60 12.72 12.84 12.96 13.08 13.20 [VDC]
R
up
(E96) ≈
205k 100k 64k9 47k5 36k5 29k4 24k9 20k1 17k9 15k8 [W]
Trim up
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
5.05 5.10 5.15 5.20 5.25 5.30 5.35 5.40 5.45 5.50 [VDC]
R
up
(E96) ≈
255k 127k 82k5 61k9 48k7 40k2 34k8 30k1 26k1 23k7 [W]
REM20-xx12SW(/P)
REM20-xx05SW(/P)
Trim down
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
11.88 11.76 11.64 11.52 11.40 11.28 11.16 11.04 10.92 10.80 [VDC]
R
down
(E96) ≈
768k 383k 249k 182k 143k 118k 97k6 84k5 73k2 63k4 [W]
Trim down
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
4.95 4.90 4.85 4.80 4.75 4.70 4.65 4.60 4.55 4.50 [VDC]
R
down
(E96) ≈
249k 121k 78k7 56k2 44k2 35k7 29k4 24k9 21k 18k2 [W]
Trim up
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
15.15 15.30 15.45 15.60 15.75 15.90 16.05 16.20 16.35 16.50 [VDC]
R
up
(E96) ≈
162k 78k7 49k9 36k5 28k 22k6 18k7 15k8 13k3 11k5 [W]
Trim up
11 12 13 14 15 16 17 18 19 20 [%]
Vout
set
=
16.65 16.80 16.95 17.10 17.25 17.40 17.55 17.70 17.85 18.00 [VDC]
R
up
(E96) ≈
10k 8k8 7k6 6k8 6k 5k3 4k6 4k1 3k6 3k2 [W]
REM20-xx15SW(/P)
Trim down
1 2 3 4 5 6 7 8 9 10 [%]
Vout
set
=
14.85 14.70 14.55 14.40 14.25 14.10 13.95 13.80 13.65 13.50 [VDC]
R
down
(E96) ≈
825K 402k 261k 191k 150k 124k 105k 88k7 76k8 68k1 [W]
Trim Calculation
Vout
nom
R
1
R
2
k
u
V
ref
5VDC 5k1W 2kW 2.5
2.5VDC
12VDC 10kW 5k1W 9.5
15VDC 10kW 5k1W 12.5
24VDC 56kW 13kW 21.5
Practical Example REM20-1212SW +10% / -10%:
Calculation:
Vout
nom
= nominal output voltage [VDC]
Vout
set
= trimmed output voltage [VDC]
V
ref
= reference voltage [VDC]
R
up
= trim up resistor [W]
R
down
= trim down resistor [W]
R
1
& R
2
= internal resistors [W]
k
u
= trim up factor [ ]
R
up
=
10k x 2.5
- 5k1 =
15k7W
13.2 - 2.5 - 9.5
R
up
according to E96 ≈ 15k8W R
down
according to E96 ≈ 64k3W
R
down
=
(10.8 - 2.5) x 10k
- 5k1 =
64k1W
12 - 10.8
R
down
=
(Vout
set
- V
ref
) x R
1
- R
2
Vout
nom
- Vout
set
R
up
=
R
1
x V
ref
- R
2
Vout
set
- V
ref
- k
u
REM20-W
Series