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参数资料
| 型号： | BCP-5/15-3.3/15-D48S |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | HALF BRICK PACKAGE-10 |
| 文件页数： | 9/12页 |
| 文件大小： | 240K |
| 代理商： | BCP-5/15-3.3/15-D48S |
75W , DU AL OUTPUT , MIXED-V OL T A GE DC/DC CONVER TERS
XCP Series
+3.3V
LOAD
+3.3V OUTPUT
–INPUT
+INPUT
3.3V TRIM
3.3V RETURN
+5V OUTPUT
5V TRIM
5V RETURN
10
8
1
4
9
7
5
6
20k
5-22
TURNS
+5V
LOAD
20k
5-22
TURNS
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 xed resistor as shown (Figures
3B & 3C). The trimpot can be used to determine the value of a single xed
resistor. A single xed resistor can increase or decrease the output voltage
depending on its connection. Fixed resistors should be metal-lm types with
absolute TCR’s less than 100ppm/°C to ensure stability.
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 conguration, should be connected to either +Input (pin 4),
–Input (pin 1), Output Returns (pins 6 & 9), or earth ground.
+3.3V
LOAD
+3.3V OUTPUT
–INPUT
+INPUT
3.3V TRIM
3.3V RETURN
+5V OUTPUT
5V TRIM
5V RETURN
10
8
1
4
9
7
5
6
+5V
LOAD
+5V
TRIM
DOWN
+3.3V
TRIM
DOWN
Figure 3A. Trim Connections Using a Trimpot
Figure 3B. Increase Output Voltage Trim Connections Using a Fixed Resistor
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.
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.
+3.3V
LOAD
+3.3V OUTPUT
–INPUT
+INPUT
3.3V TRIM
3.3V RETURN
+5V OUTPUT
5V TRIM
5V RETURN
10
8
1
4
9
7
5
6
+5V
LOAD
+5V
TRIM
UP
+3.3V
TRIM
UP
Figure 3C. Decrease Output Voltage Trim Connections Using a Fixed Resistor
Table 1 shows the typical xed 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.
Table 1. Percentage of Output Voltage Change vs Trim Resistor Value (Ohms)
3.3V
5V
Trim Down
Trim Up
Trim Down
Trim Up
0%
–
1%
47.81k
27.93k
189.75k
61.68k
2%
22.32k
12.78k
91.06k
28.34k
3%
13.82k
7.73k
58.17k
17.23k
4%
9.57k
5.21k
41.72k
11.68k
5%
7.02k
3.69k
31.85k
8.34k
6%
5.320k
2.68k
25.27k
6.12k
7%
4.10k
1.96k
20.57k
4.53k
8%
3.19k
1.42k
17.05k
3.34k
9%
2.48k
1.00k
14.31k
2.42k
10%
1.92k
0.66k
12.12k
1.68k
VO = 5.0 +
VO = 1.25
–4.99
1
0.30RT (k
) + 1.5
UP
RT
(k
) + 4.99
DOWN
UP
VO = 3.30 +
1
RT (k
) + 2.37
UP
1
(0.3VO) – 1.50
(0.8VO) – 1
RT (k
) =
RT
(k
) =
–2.37
–0.38
UP
1
VO – 3.3
1.14
+1
0.38 +
1
RT (k
) =
VO = 1.23
RT
(k
)+ 2.37
DOWN
2.07
+1
1.23 +
1
–2.37
DOWN
VO
RT
(k
) =
–1.23
1.23
2.07
1
–1
The following equations mathematically depict:
Output Voltage for a given Trim Resistor
Trim Resistor for a given Output Voltage
5 Volt Trim Up
5 Volt Trim Down
3.3 Volt Trim Up
3.3 Volt Trim Down
6
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.
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