Datasheet

www.recom-power.com
REV.: 4/2019 RBB-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 5Vin, 5Vout, 2A and after warm-up unless otherwise stated)
RBB10-2.0
Series
OUTPUT VOLTAGE TRIMMING
The RBB10-2.0 series offers the feature of trimming the output voltage over a range between 1.0V and 5.5V 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.
R
up
+V
out
Trim
R
down
GND
Trim
Trim up Trim down
Vout
nom
R
1
R
2
R
3
V
ref
5VDC 629kW 1kW 788kW 0.805
Practical Example RBB10-2.0:
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
=
629k
- 1k =
1M26W
5.5 - 5.0
R
up
according to E96 ≈ 1M27W
R
down
according to E96 ≈ 2M55W
R
down
=
(4.0 - 0.805) x 788k
=
2M52W
5.0 - 4.0
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
=
5.1 5.2 5.3 5.4 5.5 [VDC]
R
up
(E96) ≈
6M34 3M16 2M10 1M58 1M27 [W]
RBB10-2.0
Trim up
Trim down
Vout
set
=
4.5 4.0 3.5 3.3 3.0 2.5 2.0 1.8 1.5 1.0 [VDC]
R
down
(E96) ≈
5M90 2M55 1M43 1M15 866k 536k 316k 243k 158k 38k3 [W]
REMOTE SENSE
GND
+V
in
+V
in
GND GND
Trim
+Sense
+V
out
R
up
RW
1
R
down
GND
+V
out
RW
1
... wire losses +
R
up
... trim up resistor
R
down
... trim down resistor
The output voltage can be adjusted via the trim and
sense functions.
The maximum output voltage from Trim and Sense
function combined is 5.5VDC. Derating may be
required when using Trim and/or sense functions.