Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

BCP-5/15-3.3/15-D24NL2 View Datasheet(PDF) - DATEL Data Acquisition products

Part NameDescriptionManufacturer
BCP-5/15-3.3/15-D24NL2 Dual Output Mixed Voltage, BCP Models Datel
DATEL Data Acquisition products  Datel
BCP-5/15-3.3/15-D24NL2 Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
XCP Series
75W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS
Output Trimming
Both the 5V and 3.3V outputs of the BCP Series can be independently
trimmed via a trimpot (Figure 3A) or a single fixed resistor as shown (Figures
3B & 3C). The trimpot can be used to determine the value of a single fixed
resistor. A single fixed resistor can increase or decrease the output voltage
depending on its connection. Fixed resistors should be metal-film types with
absolute TCR’s less than 100ppm/°C to ensure stability.
1
–INPUT
4
+INPUT
10
+3.3V OUTPUT
3.3V TRIM 8
3.3V RETURN 9
7
+5V OUTPUT
5V TRIM 5
6
5V RETURN
20k
5-22
TURNS
20k
5-22
TURNS
+3.3V
LOAD
+5V
LOAD
Figure 3A. Trim Connections Using a Trimpot
A resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for 3.3V trim)
to the appropriate Return (pin 6 for 5V trim, pin 9 for 3.3V trim) will increase
the output voltage.
1
–INPUT
4
+INPUT
10
+3.3V OUTPUT
8
3.3V TRIM
3.3V RETURN 9
7
+5V OUTPUT
5
5V TRIM
6
5V RETURN
+3.3V
TRIM
UP
+5V
TRIM
UP
+3.3V
LOAD
+5V
LOAD
Figure 3B. Increase Output Voltage Trim Connections Using a Fixed Resistor
A single resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for
3.3V trim) to its appropriate +Output (pin 7 for 5V trim, pin 10 for 3.3V trim)
will decrease the output voltage.
1
–INPUT
4
+INPUT
10
+3.3V OUTPUT
3.3V TRIM
8
3.3V RETURN 9
7
+5V OUTPUT
5V TRIM
5
6
5V RETURN
+3.3V
TRIM
DOWN
+5V
TRIM
DOWN
+3.3V
LOAD
+5V
LOAD
Figure 3C. Decrease Output Voltage Trim Connections Using a Fixed Resistor
Table 1 shows the typical fixed Trim Resistor values for output voltage
changes of 0 through 10%. Trim adjustment greater than 10% can have an
adverse affect on the converter’s performance and is not recommended.
3.3V
Trim Down
0%
1%
47.81k
2%
22.32k
3%
13.82k
4%
9.57k
5%
7.02k
6%
5.320k
7%
4.10k
8%
3.19k
9%
2.48k
10%
1.92k
3.3V
Trim Up
27.93k
12.78k
7.73k
5.21k
3.69k
2.68k
1.96k
1.42k
1.00k
0.66k
5V
Trim Down
189.75k
91.06k
58.17k
41.72k
31.85k
25.27k
20.57k
17.05k
14.31k
12.12k
5V
Trim Up
61.68k
28.34k
17.23k
11.68k
8.34k
6.12k
4.53k
3.34k
2.42k
1.68k
Table 1. Percentage of Output Voltage Change vs Trim Resistor Value (Ohms)
The following equations mathematically depict:
Output Voltage for a given Trim Resistor
Trim Resistor for a given Output Voltage
5 Volt Trim Up
1
VO = 5.0 +
0.30RTUP (k) + 1.5
RTUP(k) =
1
(0.3VO) – 1.50
–4.99
5 Volt Trim Down
VO = 1.25
1.14
+1
1
0.38 +
RTDOWN (k) + 4.99
RTDOWN (k) =
1
1.14
(0.8VO) – 1
–0.38
–4.99
3.3 Volt Trim Up
1
VO = 3.30 +
RTUP (k) + 2.37
RTUP(k) =
1
VO – 3.3
–2.37
3.3 Volt Trim Down
VO = 1.23
1.23 +
2.07
+1
1
RTDOWN (k)+ 2.37
RTDOWN (k) =
1
2.07 –1.23
VO
1.23
–1
–2.37
Note: Resistor values are in k. Accuracy of adjustment is subject
to tolerances of resistor values and factory-adjusted output accuracy.
VO = desired output voltage.
Case Connection
BCP DC/DC's do not have their metal baseplate connected to one of the input
pins. The "uncommitted" baseplate is connected to pin 2 which, depending
upon your system configuration, should be connected to either +Input (pin 4),
–Input (pin 1), Output Returns (pins 6 & 9), or earth ground.
6
Direct download click here

 

Share Link : 
All Rights Reserved© datasheetq.com 2015 - 2019  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]