Datasheet

www.recom-power.com
REV.: 1/2019 PB-4
DC/DC Converter
Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)
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
set
= 5.05 5.10 5.15 5.20 5.25 5.30 5.35 5.4 5.45 5.50 [VDC]
R
up
(E96) ≈ 1M58 806k 536k 402k 324k 247k 237k 205k 187k 169k [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) ≈ 5M76 2M94 1M96 1M47 1M21 1M02 866k 768k 698k 619k [W]
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) ≈ 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.
R
up
Trim
+Sense
-Sense
Trim
R
down
Trim up Trim down
Vout
nom
R
1
R
2
R
3
V
ref
5VDC
10k2W 511kW 5k11 1.225VDC
12VDC
15VDC
24VDC
48VDC
Practical Example RP60Q-xx05SRW +10% / -10%
Calculation:
R
up
according to E96 ≈ 169kW R
down
according to E96 ≈ 41k2W
R
up
=
5k11 x 5 x (100 + 10)
-
(10k2 x 10) + 511k
= 168kW
1.225 x 10 10
R
up
=
R
3
x Vout
nom
x (100 + DVout )
-
(R
1
x DVout) + R
2
V
ref
x DVout
DVout
R
down
=
R
2
- R
1
DVout
R
down
=
511k
- 10k2 =
40k9W
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
1
,R
2,
R
3
= internal resistors [W]