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OKI-T/36W-W40 Series
Selectable Output 36-Watt DOSA-SMT DC/DC Converters
Performance and Functional Speci?cations
See Note 1
Input
Environmental
Input Voltage Range
See Ordering Guide.
Calculated MTBF
Isolation
Start-Up Voltage
Undervoltage Shutdown (see Note 15)
Overvoltage Shutdown
Re?ected (Back) Ripple Current (Note 2)
Internal Input Filter Type
Recommended External Fuse
Reverse Polarity Protection
Input Current:
Not isolated
18.4 V
17 V min., 18.7V max.
None
20 mA pk-pk
Capacitive
5A fast blow
None. Please install external fuse.
Telecordia method (4a)
Calculated MTBF
MIL-HDBK-217N2 method (4b)
Operating Temperature Range (Ambient)
See derating curves
Operating PC Board Temperature
Storage Temperature Range
Thermal Protection/Shutdown
Relative Humidity
TBD
TBD
-40 to +85 ?C. with derating (Note 9)
-40 to +100 ?Celsius max., no derating (12)
-55 to +125 deg. C.
+130 ?Celsius
to 85%/+85 ?C., non-condensing
Full Load Conditions
See Ordering Guide
Physical
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
Low Line (Vin=Vmin)
Remote On/Off Control (Note 5)
Negative Logic (“N” model suf?x)
Current
Positive Logic (“P” model suf?x)
0.4 A2Sec.
5 mA
60 mA
2.0A. (Vout = 15V)
ON = -0.3V to +1.2V
OFF = (Vin -2.5V) to 40V or open
1 mA max.
ON = Open pin (internally pulled up) or
Outline Dimensions
Weight
Safety
Restriction of Hazardous Substances
MSL Rating
See Mechanical Speci?cations
0.072 ounces (2.04 grams)
Meets UL/cUL 60950-1, CSA-
C22.2 No. 60950-1, IEC/EN 60950-1
RoHS-6 ( does not claim EU RoHS exemption
7b–lead in solder )
2
= (Vin -2.5V) to 40V or open
Absolute Maximum Ratings
Current
Output Power
OFF = -0.3V to +1.2V
1 mA max.
Output
36W max.
Input Voltage (Continuous or transient)
On/Off Control
Input Reverse Polarity Protection
Output Current (Note 7)
0 V.to +40 Volts max.
0 V. min. to +Vin max.
None. Install external fuse.
Current-limited. Devices can withstand a
Minimum Loading
Accuracy (50% load, untrimmed)
Voltage Output Range (Note 13)
Overvoltage Protection (Note 16)
Temperature Coef?cient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
Ef?ciency
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms
Cap-ESR >0.01 Ohms
Current Limit Inception (Note 6)
(98% of Vout setting, after warm up)
Short Circuit Mode
Short Circuit Current Output
Protection Method
No minimum load
±2 % of Vset
See Ordering Guide
None
±0.02% per °C of Vout range
See Ordering Guide and note 8
See Ordering Guide and note 10
See Ordering Guide
1,000 μF
3,000 μF (min. cap. load 0 μF)
4.5 Amps
0.0 A
Hiccup autorecovery upon overload
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 speci?cations
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 Speci?cations
Table is not implied nor recommended.
Speci?cation Notes:
(1) Speci?cations are typical at +25 °C, Vin=nominal (+24V.), Vout=nominal (+12V), full load, external caps and
natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced
air?ow.
All models are tested and speci?ed 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 speci?ed 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.
removal. (Note 17)
(2)
Input Back Ripple Current is tested and speci?ed over a 5 Hz to 20 MHz bandwidth. Input ?ltering is Cin=2 x
Short Circuit Duration
Continuous, no damage
100 μF tantalum, Cbus=1000 μF electrolytic, Lbus=1 μH.
(output shorted to ground)
(3)
Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
Prebias Startup
Converter will start up if the external
output voltage is less than Vnominal.
temperatures and/or lower air?ow, 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 ?xed
Dynamic Characteristics
Dynamic Load Response TBDμSec max. to within ±2% of ?nal value
(50-100 load step, di/dt=1A/μSec, 5 Vout, Cout = 1&10 μ F ceramic)
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.
Start-Up Time
(Vin on or On/Off to Vout regulated)
Switching Frequency
8 mSec for Vout=nominal (Vin On)
8 mSec for Vout=nominal (Remote On/Off)
300 KHz
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