BST-5/250-D48-C 查看數據表（PDF） - Murata Power Solutions
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BST-5/250-D48-C Datasheet PDF : 5 Pages
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Dual Output BST Models
Low-Cost, High Reliability 3 Watt, DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
Input Current
Input Filter Type
Reverse-Polarity Protection
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 2A maximum)
Output
VOUT Accuracy (50% load)
±1%, maximum
Temperature Coefficient
±0.02% per °C
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide
Isolation Voltage
1000Vdc, minimum
Short Circuit Protection: ➁
“D5” Models
“D12” and “D48” Models
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
Dynamic Characteristics
Transient Response (50% load step) 200µsec to ±1.5% of final value
Switching Frequency:
“D48” Models
“D5” and “D12” Models
200kHz
170kHz
Environmental
Operating Temperature
(Ambient, no derating)
Storage Temperature
–40 to +75°C
– 55 to +100°C
Physical
Dimensions
Case Material
Pin Material
Weight
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Diallyl phthalate, UL94V-0 rated
Gold-plated copper alloy with nickel
underplate
0.5 ounces (14.2 grams)
➀ These power converters require a minimum 10% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed specifications.
➁ The current limit inception point is dependent on the input voltage. Therefore, it is possible
to draw current beyond the rated capacity. Users should fully characterize their load conditions.
Absolute Maximum Ratings
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature (soldering, 10 sec.)
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Maximum current and short-circuit
duration are model dependent. “D12”
and “D48” models can withstand
sustained output short circuits.
–55 to +100°C
+280°C
These are stress ratings. Exposure of devices to greater than any
of these conditions may adversely affect long-term reliability. Proper
operation under conditions other than those listed in the Performance/
Functional Specifications Table is not implied or recommended.
PAR
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are “floating.” Any
BST model may be configured to produce an output of 10V, 24V or 30V (for
±5V, ±12V or ±15V models, respectively) by applying the load across the
+Output (pin 6) and –Output (pin 8), with either output grounded. The Common
(pins 5 and 7) should be left open (unconnected). Minimum 20% loading is
recommended under these conditions.
Filtering and Noise Reduction
All BST 3 Watt DC/DC Converters achieve their rated ripple and noise specifica-
tions without the use of external input/output capacitors. In critical applications,
input/output ripple and noise may be further reduced by installing electrolytic
capacitors across the input terminals and/or low-ESR tantalum or electrolytic
capacitors across the output terminals. Output capacitors should be con-
nected between their respective output pin (pins 6 and 8) and Common (pins 5
and 7) as shown in Figure 2. The caps should be located as close to the power
converters as possible. Typical values are listed in the tables below. In many
applications, using values greater than those listed will yield better results.
To Reduce Input Ripple
"D5" Models
"D12" Models
"D48" Models
47μF, 15V
10μF, 35V
4.7μF, 100V
To Reduce Output Ripple
±5V Outputs
47μF, 10V, Low ESR
±12/15V Outputs 22μF, 20V, Low ESR
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