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参数资料
| 型号： | BWR-5/3-3.3/4.25-D48AL2 |
| 厂商： | CD TECHNOLOGIES INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 4/6页 |
| 文件大小： | 228K |
| 代理商： | BWR-5/3-3.3/4.25-D48AL2 |
3 0 W , D U A L O U T P U T , M I X E D - V O L T A G E D C / D C C O N V E R T E R S
A-Series
Output
P
o
wer
(watts)
Ambient Temperature (
°C)
35
30
25
20
15
10
5
0
–40
–10
0
10
20
30
40
50
60
70
80
90
100
Output Power vs. Ambient Temperature
(VIN nominal, natural convection air flow.)
D12A MODELS
D24A, D48A
MODELS
Typical Performance Curves
Absolute Maximum Ratings
Input Voltage:
Continuous:
D12A Models
23 Volts
D24A Models
42 Volts
D48A Models
81 Volts
Transient (100msec): D12A Models
25 Volts
D24A Models
50 Volts
D48A Models
100 Volts
Input Reverse-Polarity Protection
Input Current must be limited. 1 minute
duration. Fusing recommended.
D12A Models
6 Amps
D24A Models
4 Amps
D48A Models
2 Amps
Output Current
Current limited. Devices can withstand
an indenite output short circuit.
On/Off Control (Pins 3 & 4) Max. Voltages
Referenced to –Input (pin 2)
D12A, D24A & D48A Models
+VIN
"N" Models
±19V
Storage Temperature
–40 to +120°C
Lead Temperature (Soldering, 10 sec.)
+300°C
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specications Table is not implied, nor recommended.
T E C H N I C A L N O T E S
Trimming Output Voltages
These BWR converters have a trim capability (pins 3 & 4) that allow users
to independently adjust the output voltages ±5%. Adjustments to the output
voltages can be accomplished via a trim pot, Figure 2, or a single xed
resistor as shown in Figures 3 and 4. A single xed resistor can increase
or decrease the output voltage depending on its connection. Fixed resistors
should have absolute TCR's less than 100ppm/°C to minimize sensitivity to
changes in temperature.
A single resistor connected from the 5V Trim pin (pin 7) to the +5V Output
(pin 5), see Figure 3, will decrease the +5V output voltage. A resistor con-
nected from the +5V Trim (pin 7) to the +5V Return (pin 6) will increase the
+5V output voltage. See Figure 4.
Similarly, the 3.3V output can be adjusted using a single resistor connected
from the +3.3V Trim (pin 10) to the +3.3V Output (pin 9) or to the +3.3V
Return (pin 8). See Figures 3 and 4.
+5V
LOAD
+5V OUTPUT
–INPUT
+5V
ON/OFF
CONTROL
+3.3V
ON/OFF
CONTROL
+INPUT
+5V TRIM
+5V RETURN
+3.3V OUTPUT
+3.3V TRIM
+3.3V RETURN
10
8
1
4
9
7
5
6
20k
5-22
TURNS
3
2
+3.3V
LOAD
20k
5-22
TURNS
+5V LOAD
5V RTRIM DOWN
+5V OUTPUT
–INPUT
+5V
ON/OFF
CONTROL
+3.3V
ON/OFF
CONTROL
+INPUT
+5V TRIM
+5V RETURN
+3.3V TRIM
+3.3V OUTPUT
+3.3V RETURN
9
8
1
4
10
7
5
6
3
2
+3.3V LOAD
3.3V RTRIM DOWN
+5V LOAD
5V RTRIM UP
+5V OUTPUT
–INPUT
+5V
ON/OFF
CONTROL
+3.3V
ON/OFF
CONTROL
+INPUT
+5V TRIM
+5V RETURN
+3.3V TRIM
+3.3V OUTPUT
+3.3V RETURN
9
8
1
4
10
7
5
6
3
2
+3.3V LOAD
3.3V RTRIM UP
4
Note: Resistor values are in k
. Accuracy of adjustment is subject to
tolerances of resistors and factory-adjusted output accuracy.
VO = desired output voltage.
UP
VO – 5
5V RT (k
) =
–15
6.27
UP
VO – 3.3
3.3V RT (k
) =
–14.3
3.16
DOWN
5 – VO
5V RT
(k
) =
–15
2.49(VO – 2.52)
DOWN
3.3 – VO
3.3V RT
(k
) =
–14.3
2.49(VO – 1.27)
Figure 2.Trim Connections Using A Trim Pot
Figure 3.Trim Connections To Decrease Output Voltages Using Fixed Resistors
Figure 4.Trim Connections To Increase Output Voltages Using Fixed Resistors
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