OKI-T/3-W40N-C 查看數據表（PDF） - Murata Power Solutions
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OKI-T/3-W40N-C Datasheet PDF : 12 Pages
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OKI-T/3-W40 Series
Adjustable Output 3-Amp DOSA-SMT DC/DC Converters
Performance and Functional Specifications
See Note 1
Input
Input Voltage Range
See Ordering Guide and Note 7.
Isolation
Not isolated
Start-Up Voltage
15 V
Undervoltage Shutdown (see Note 15) 14 V min., 15.5V max.
Overvoltage Shutdown
None
Reflected (Back) Ripple Current (Note 2) 20 mA pk-pk
Internal Input Filter Type
Capacitive
Recommended External Fuse
1.2A fast blow
Reverse Polarity Protection
N/A. See fuse information.
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
Low Line (Vin=Vmin)
See Ordering Guide
0.4 A2Sec.
5 mA
60 mA
1.03A.
Remote On/Off Control (Note 5)
Negative Logic (“N” model suffix)
Current
Positive Logic (“P” model suffix)
Current
ON = -0.3V to +1.2V
OFF = (Vin -2.5V) to 40V or open
1 mA max.
ON = Open pin (internally pulled up) or
= (Vin -2.5V) to 40V or open
OFF = -0.3V to +1.2V
1 mA max.
Output
Output Power
15W max.
Minimum Loading
No minimum load
Accuracy (50% load, untrimmed)
±2 % of Vnominal
Voltage Output Range (Note 13)
See Ordering Guide
Overvoltage Protection (Note 16)
None
Temperature Coefficient
±0.02% per °C of Vout range
Ripple/Noise (20 MHz bandwidth)
See Ordering Guide and note 8
Line/Load Regulation
See Ordering Guide and note 10
Efficiency
See Ordering Guide
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms
1,000 μF
Cap-ESR >0.01 Ohms
3,000 μF (min. cap. load 0 μF)
Current Limit Inception (Note 6)
(98% of Vout setting, after warm up) 5.5 Amps
Short Circuit Mode
Short Circuit Current Output
Protection Method
Short Circuit Duration
Prebias Startup
0.0 A
Hiccup autorecovery upon overload
removal. (Note 17)
Continuous, no damage
(output shorted to ground)
Converter will start up if the external
output voltage is less than Vnominal.
Dynamic Characteristics
Dynamic Load Response
125μSec max. to within ±2% of final value
(50-100 load step, di/dt=2.5A/μSec, 5 Vout, Cout = 1&10µF ceramic)
Start-Up Time
8 mSec for Vout=nominal (Vin On)
(Vin on or On/Off to Vout regulated) 6 mSec for Vout=nominal (Remote On/Off)
Switching Frequency
300 KHz
Environmental
Calculated MTBF
Telecordia method (4a)
TBD
Calculated MTBF
MIL-HDBK-217N2 method (4b)
TBD
Operating Temperature Range (Ambient)
See derating curves
-40 to +85 ˚C. with derating (Note 9)
Operating PC Board Temperature
-40 to +100 ˚Celsius max., no derating (12)
Storage Temperature Range
-55 to +125 deg. C.
Thermal Protection/Shutdown
+130 ˚Celsius
Relative Humidity
to 85%/+85 ˚C., non-condensing
Physical
Outline Dimensions
See Mechanical Specifications
Weight
0.072 ounces (2.04 grams)
Safety
Designed to meet UL/cUL 60950-1, CSA-
C22.2 No. 60950-1, IEC/EN 60950-1
Restriction of Hazardous Substances
RoHS-6 (does not claim EU RoHS exemption
7b–lead in solder)
MSL Rating
2
Absolute Maximum Ratings
Input Voltage (Continuous or transient) 0 V.to +40 Volts max.
On/Off Control
0 V. min. to +Vin max.
Input Reverse Polarity Protection
See Fuse section
Output Current (Note 7)
Current-limited. Devices can withstand a
sustained short circuit without damage.
The outputs are not intended to accept
appreciable reverse current.
Storage Temperature
-55 to +125 ˚C.
Lead Temperature
See soldering specifications
Absolute maximums are stress ratings. Exposure of devices to greater than any of
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 nor recommended.
Specification Notes:
(1) Specifications are typical at +25 °C, Vin=nominal (+24V.), Vout=nominal (+5V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced
airflow.
All models are tested and specified with external 1 μF paralleled with 10μF ceramic/tantalum output
capacitors and a 22 μF external input capacitor. All capacitors are low ESR types. These capacitors are
necessary to accommodate our test equipment and may not be required to achieve specified performance
in your applications. However, Murata Power Solutions recommends installation of these capacitors. All
models are stable and regulate within spec under no-load conditions.
(2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=2 x
100 μF tantalum, Cbus=1000 μF electrolytic, Lbus=1 μH.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total
RMS current over time does not exceed the Derating curve.
(4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed
conditions, Tpcboard=+25 ˚C, full output load, natural air convection.
(4b) Mean Time Before Failure is calculated using the MIL-HDBK-217N2 method, ground benign, +25ºC., full
output load, natural convection.
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email: sales@murata-ps.com
05 Nov 2009 MDC_OKI-T/3-W40 Series.A01_D8 Page 4 of 12
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