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參數資料
| 型號： | UNS-3.3/3-D5 |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 2 X 0.800 INCH, 0.400 INCH HEIGHT, PACKAGE-10 |
| 文件頁數： | 3/5頁 |
| 文件大?。?/td> | 107K |
| 代理商： | UNS-3.3/3-D5 |
N O N - I S O L AT E D , 1 0 a n d 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
UNS Series
3
TECHNI CAL NOTES
Input Voltage:
"D5" Models
"D12" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
15 Volts
18 Volts
None. See Technical Notes.
None
Current limited. Devices can
withstand an output short circuit
for brief durations only.
–25 to +85°C
+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 Specifications Table is not implied.
Absolute Maximum Ratings
Input and Output Capacitors
Though UNS Series, non-isolated, DC/DC converters have on-board input
and output capacitors (C
IN
= 6.8μF C
OUT
= 6.8μF), the majority of applica-
tions will require the installation of additional external I/O capacitance.
The total input capacitance functions as a true energy-storage element, and
its optimal value will vary as a function of line voltage. The selected external
input capacitor should have both low ESR and low ESL because, as the
power converter’s input FET switch cycles on and off, the input capacitance
must have the ability to instantaneously supply pulses of relatively high cur-
rent.
Rather than install a large, expensive, on-board capacitor that addresses
all possible input-voltage and output-load conditions, DATEL has chosen to
leave out the bulk of the input capacitance so that users may select a cost-
effective component appropriate to their own application. We use a low-ESR
100μF external input capacitor during production testing and have found
330μF to be a conservative value that works well in the majority of applica-
tions.
In addition to their on-board output capacitor, UNS Series devices require
the installation of additional output capacitors to achieve rated ripple/noise
specifications. External output capacitors should be low-ESR tantalum or
electrolytic types, and they should be located as close to the converters
as possible. A minimum of 220μF is required to achieve rated ripple/noise
specs. Increased capacitance will lower output noise. There are no limitations
on output capacitance; however, we have found minimal noise improvements
beyond 4700μF
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
UNS Series devices require external input/output capacitors to achieve rated perfor
mance. Listed specifications assume C
IN
= 100μF and C
OUT
= 220μF
See Technical Notes.
Output Ripple/Noise can be reduced with external capacitors. See Technical Notes.
UNS Series converters have no minimum-load requirements.
Current limiting initiates at approximately 5% above rated load.
DIP models have a standoff which makes their total above-board height 0.44 inches.
Input
Input Voltage Range:
"D5" and "D5D" Models
"D12" and "D12D" Models
Input Current
Input Filter Type
Overvoltage Protection
Reverse-Polarity Protection
On/Off Control
(Pin 5)
4.75-13.6 Volts (7.5V nominal)
6-16.5 Volts (12V nominal)
See Ordering Guide
Capacitive
None
None
TTL high (or open) = on, low = off
Output
V
OUT
Accuracy
Temperature Coefficient
Ripple/Noise
(20MHz bandwidth)
Line/Load Regulation
Efficiency
Current Limiting
±5%, maximum
±0.01% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
Auto-recovery
Dynamic Characteristics
Transient Response
(50% load step)
Switching Frequency
200μsec max. to ±2% of final value
190kHz
Environmental
Operating Temperature:
Wthout Derating
Wth Derating
Storage Temperature
–10 to +50°C
to +70°C (See Derating Curve)
–25 to +85°C
Physical
Dimensions
: SIP Models
Shielding
Case Connection
Pin Material
Weight
2 x 0.41 x 0.8" (50 x 10.3 x 21mm)
2 x 0.8 x 0.44" (50 x 21 x 11.3mm)
None
None
Gold-plated phosphor bronze
0.35 ounces (10 grams)
DIP Models
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