Datasheet

www.recom-power.com
REV.: 1/2019 P-4
Evaluation Module
Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)
RPM-1.0-EVM-1
OUTPUT VOLTAGE TRIMMING
The RPM series offers the feature of trimming the output voltage over a range between 0.9V and 6V by using external trim resistors. The values
for trim resistors shown in trim tables below are according to standard E96 values; therefore, the specified voltage may slightly vary.
Trim up Trim down
Vout
nom
R
1
R
2
R
3
V
ref
3.3VDC 376kW
1kW
471kW
0.81VDC
5VDC 344kW 431kW
Practical Example RPM3.3-1.0:
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
, R
3
= internal resistors [W]
R
up
=
376k
- 1k =
375kW
4.3 - 3.3
R
up
according to E96 374kW R
down
according to E96 309kW
R
down
=
(1.8 - 0.81) x 471k
=
311kW
3.3 - 1.8
R
down
=
(Vout
set
- V
ref
) x R
3
Vout
nom
- Vout
set
R
up
=
R
1
- R
2
Vout
set
- V
nom
Vout
set
=
3.5 3.7 3.9 4.1 4.3 4.5 4.7 5.0 5.5 6.0 [VDC]
R
up
(E96)
1M87 931k 619k 464k 374k 309k 267k 221k 169k 137k [W]
RPM3.3-1.0
Trim up
Trim up
Trim down
Trim down
Vout
set
=
3.0 2.7 2.5 2.2 2.0 1.8 1.5 1.2 1.0 0.9 [VDC]
R
down
(E96)
3M40 1M47 1M 590k 432k 309k 182k 86k6 39k2 17k4 [W]
Vout
set
=
5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 [VDC]
R
up
(E96)
2M21 1M33 976k 750k 619k 523k 453k 402k 357k 324k [W]
RPM5.0-1.0
Vout
set
=
4.5 4.0 3.5 3.3 2.5 1.8 1.5 1.2 1.0 0.9 [VDC]
R
down
(E96)
3M16 1M37 768k 634k 294k 133k 84k5 44k2 20k5 9k53 [W]
R
up
+V
out
Trim
R
down
GND
Trim