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參數(shù)資料
| 型號： | UNR-3.3/10-D12SM |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 33 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 239K |
| 代理商： | UNR-3.3/10-D12SM |
UNR Models
N O N - I S O L A T E D , 1 8 - 3 3 W , 5 & 1 2 V - I N P U T D C / D C C O N V E R T E R S
Input
Input Voltage Range
3.0 to 3.6 Volts (3.3V nominal)
D5 Models
4.75-5.5 Volts (5V nominal)
D12 Models
10.8-13.6 Volts (12V nominal)
Input Current:
Normal Operating Conditions
See Ordering Guide
Standby/Off Mode
3.6mA typical
Input Ripple Current:
1.8/2.5V Models
150mAp-p
3.3/8 -D5 Models
100mAp-p
3.3/10 -D5 Models
150mAp-p
3.3/8 -D12 Models
110mAp-p
3/3/10 -D12 Models
250mAp-p
Input Filter Type
Capacitive
Overvoltage Protection
None
Reverse-Polarity Protection
None
On/Off Control:
Functionality
TTL high (or open) = on, low = off
Logic Threshold
+0.8-2.0 Volts (1.5V typical)
Output
VOUT Accuracy (50% load):
1.8VOUT Models
±2% of VOUT maximum
2.5/3.3VOUT Models
±1% of VOUT maximum
VOUT Trim Range
Trim pin tied to +Output:
VOUT = 1.52 Volts or less
Trim pin tied to Output Return
VOUT = 3.6 Volts or greater
Temperature Coefcient
±0.02% per °C
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efciency
See Ordering Guide
Overcurrent Protection:
Technique
"Hiccup" with auto-recovery
Overcurrent Detection Point
110-180% of rated current
Average Short Circuit Current:
D5 Models
1 Amp typical, 3 Amps maximum
D12 Models
4 Amp typical, 6 Amps maximum
Dynamic Characteristics
Transient Response (50-100% load):
1.8VOUT Models
100sec to 3% of nal value
1.8/2.5VOUT Models
25sec to 2.5% of nal value
3.3VOUT -D5 Models
50sec to 2.5% of nal value
3.3/8 -D12 Models
50sec to 1% of nal value
3.3/10 -D12 Models
50sec to 2.5% of nal value
Start-Up Time:
VIN to VOUT
25/30msec (1.8/2.5VOUT models)
On/Off to VOUT
25/30msec (1.8/2.5VOUT models)
Switching Frequency
300kHz (±30kHz)
Environmental
Operating Temperature (Ambient):
Without Derating
See Derating Curves
With Derating
to +100°C (See Derating Curves)
Storage Temperature
–40 to +105°C
Physical
Dimensions:
D5 Through-Hole Models
2" x 1" x 0.39" (51 x 25 x 9.9mm)
D5 Surface-Mount Models
2" x 1" x 0.43" (51 x 25 x 10.9mm)
D12 Through-Hole Models
2" x 1" x 0.48" (51 x 25 x 12.2mm)
D12 Surface-Mount Models
2" x 1" x TBD" (51 x 25 x 12.7mm)
Performance/Functional Specications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted.
All models are tested and specied with an external 470F input capacitor with a 20m
ESR and a 6Arms ripple-current rating, as well as a 22F output capacitor with a 200m
ESR.
See I/O Filtering and Noise Reduction for more details. These devices have no minimum-load
requirements and will regulate under no-load conditions. Listed specications apply for both
"T" and "SM" models as appropriate.
See Output Overcurrent Detection for details.
See On/Off Control for details.
See Output Voltage Trimming for details.
For all models, output noise can be further reduced with the installation of additional
external output capacitors. See I/O Filtering and Noise Reduction for details.
See Start-Up Time for details.
See Temperature Derating for details.
Input Voltage:
Continuous:
D5 Models
7 Volts
D12 Models
15 Volts
Transient (100msec)
15 Volts
Input Reverse-Polarity Protection
None
Input/Output Overvoltage Protection
None
Output Current
Current limited. Devices can
withstand a sustained output
short circuit without damage.
Storage Temperature
–40 to +105°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.
Absolute Maximum Ratings
3
T E C H N I C A L N O T E S
Physical
Shielding
5 sided
Case Connection
Input/Output Return
Case Material
Corrosion-resistant steel with
non-conductive, epoxy-based, black
enamel nish and plastic baseplate
Pin Material
Copper, tin plated
IRMS = IOUT
VOUT
VIN
VOUT
VIN
(1 –
)
Return Current Paths
These are non-isolated DC/DC converters. The Input Return, Output Return
and Logic Ground pins are all connected together internally. To the extent
possible, all input and load currents should be returned through the Input
Return and Output Return, respectively (via low-impedance runs). Any con-
trol signals applied to the On/Off Control pin should be referenced to Logic
Ground. The internal trace leading to Logic Ground is not designed to carry
high current. Consequently, devices should never be installed in a manner
that results in high current ow through Logic Ground (i.e., the Input/Output
Return pins should never be left open or connected via high-impedance paths).
I/O Filtering and Noise Reduction
All UNR 18-33W Series converters are tested and specied with external
470F input capacitors (20m
ESR, 6Arms ripple-current rating) and
external 22F output capacitors (200m
ESR). External input capacitance is
required and must be rated to handle the input ripple current as follows:
In critical applications, input/output ripple/noise may be further reduced by
installing additional I/O caps.
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