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RBBA3000 Datasheet(PDF) 3 Page - Recom International Power

Part # RBBA3000
Description  Non-isolated buck/boost converter
PDF  8 Pages
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Manufacturer  RECOM [Recom International Power]
Direct Link  http://www.recom-international.com
Logo RECOM - Recom International Power

RBBA3000 Datasheet(HTML) 3 Page - Recom International Power

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REV.: 0/2019
RBB-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 2.5m/s, nom. Vin, 24Vout and after warm-up unless otherwise stated)
RBBA3000
Series
The RBBA3000 series offers the feature of trimming the output voltage over a range between 0V and 60V by using precision trim resistors
between the Trim and -Sense pin (1% recommended). Undriven Trim pin will set Vout to 0VDC.
Additionally the Trim pin can be driven from an external voltage source:
REMOTE SENSE
+V
in
-V
in
-Vin
+Vin
Trim
-Sense
+Sense
R
W
-Vout
+Vout
R
Trim
+V
out
-V
out
R
W
... wire losses
R
Trim ... trim resistor
The output voltage can be adjusted via the Trim and -Sense
functions. The maximum output voltage from Trim and -Sense
function combined is 60VDC. The maximum allowed voltage
between +Sense and +Vout pins is 6VDC. Derating may be
required when using trim and/or sense functions.
Vout
max
R
1
R
2
k
V
ref1
V
ref2
60VDC
11k83
W 10k912W
0.058
2.366
2.316
Practical Example RBBA3000-50 (set Vout to 24VDC):
Calculation:
Vout
max
= maximum output voltage [VDC]
Vout
set
= trimmed output voltage
[VDC]
k
= trim up factor
[ ]
V
setU
= set voltage
[VDC]
V
ref1, Vref2
= reference voltage
[VDC]
R
Trim
= trim resistor
[
W]
R
1, R2
= internal resistors
[
W]
R
Trim =
11k83 x 60
- 10k912
= 23k68W
24 - 0.058 x 60
V
setU=
2.366 - 2.316 x
24
= 1.44V
60
R
Trim according to E96 ≈ 23k7W
R
Trim =
R
1 x Voutmax
- R
2
Vout
set + k x Voutmax
V
setU=
V
ref1 - Vref2 x
Vout
set
Vout
max
+V
in
-V
in
-Vin
+Vin
Trim
-Sense
+Sense
-Vout
+Vout
R
Trim
+V
out
-V
out
V
setU
Output Voltage Trimming



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