OKI-78SR-3.3/1.5-W36-C Murata Power Solutions Inc, OKI-78SR-3.3/1.5-W36-C Datasheet - Page 4

• Manufacturer Part Number: OKI-78SR-3.3/1.5-W36-C
• Description: CONV DC/DC 4.95W 36VIN 3.3VOUT
• Manufacturer: Murata Power Solutions Inc
• Series: Okami™ OKI-78SRr
• Type: Point of Load (POL) Non-Isolatedr

Specifications of OKI-78SR-3.3/1.5-W36-C

• Number Of Outputs: 1
• Package / Case: 3-SIP Module
• Output: 3.3V
• Power (watts): 5W
• Mounting Type: Through Hole
• Voltage - Input: 7 ~ 36V
• 1st Output: 3.3 VDC @ 1.5A
• Size / Dimension: 0.41" L x 0.30" W x 0.65" H (10.4mm x 7.6mm x 16.5mm)
• Power (watts) - Rated: 4.95W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 85.5%
• Approvals: EN, IEC, UL
• Output Power: 4.95 W
• Input Voltage Range: 7 V to 36 V
• Input Voltage (nominal): 12 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 1.5 A
• Package / Case Size: 10.4 mm x 16.5 mm x 7.6 mm
• Output Voltage: 3.3 V
• Product: Non-Isolated / POL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 811-2195-5; OKI-78SR3.3/1.5-W36-C

Input Voltage Range
Recommended External Fuse
Reverse Polarity Protection (Note 9) None. Install an external fuse.
Isolation (note 5)
Start-Up Voltage
Undervoltage Shutdown (Note 13)
Overvoltage Shutdown
Internal Input Filter Type
Input Current:
Output Voltage
Output Current Range
Minimum Loading (Note 12)
Maximum Output Power
Accuracy (50% load)
Overvoltage Protection (Note 7)
Temperature Coeffi cient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
Effi ciency
Maximum Capacitive Loading
Current Limit Inception (98% of Vout
setting, after warm up)
Short Circuit Mode (Notes 6, 12)
Prebias Startup
Dynamic Load Response (50% to 100% load step, no external caps)
Switching Frequency
Calculated MTBF (Note 4)
Operating Ambient Temperature Range
Storage Temperature Range
Relative Humidity
Performance and Functional Specifi cations
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
No Load
Low Line (Vin=Vmin, Vout=nom)
Refl ected (Back) Ripple Current
(Note 2)
Cap-ESR=0.001 to 0.01 Ohms
Cap-ESR >0.01 Ohms
Short Circuit Current Output
Protection Method
Short Circuit Duration
di/dt = 1 A/μSec
Peak deviation
Full power, with derating [3]
All specifi cations are typical unless noted. See Note 1
Dynamic Characteristics
Environmental
See Ordering Guide.
2 Amps fast blow
Not isolated. The input and output share a
common return.
4.85V. min., 6.0V. max (OKI-78SR-3.3/1.5-W36)
6.5V. min., 7.5V. max. (OKI-78SR-5/1.5-W36)
4.15V.min., 4.5V. max. (OKI-78SR-3.3/1.5-W36)
3.5V. min., 5.0V. max. (OKI-78SR-5/1.5-W36)
None
Capacitive
See Ordering Guide
0.16 A
1 mA
5 mA
5 mA
0.8 Amps (OKI-78SR-3.3/1.5-W36)
1.16 Amps (OKI-78SR-5/1.5-W36)
10 mA pk-pk (OKI-78SR-3.3/1.5-W36)
49 mA pk-pk (OKI-78SR-5/1.5-W36)
See Ordering Guide
0 to 1.5 Amps
No minimum load
5.15 Watts (OKI-78SR-3.3/1.5-W36)
7.8 Watts (OKI-78SR-5/1.5-W36)
±4 % of Vnom
None
±0.02% per °C. of Vout range
See Ordering Guide and note 12
See Ordering Guide and note 10
See Ordering Guide and performance graphs
300 μF
3300 μF
3.5 Amps
10 mA
Hiccup autorecovery upon overload removal.
(Note 8)
Continuous, no damage (output shorted to
ground)
The converter will start up if the external output
voltage is less than Vnominal.
25 μSec settling time to within ±2% of fi nal value
100 mV
500 KHz
TBC
-40 to +85 °C. see derating curves.
-55 to +125 °C.
to 85%/+85 °C.
Output
Input
2
Sec.
www.murata-ps.com
Specifi cation Notes:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10) Regulation specifi cations describe the deviation as the line input voltage or output load current is varied
(11) CAUTION: Since the converter is mounted on the end by its pins, do not subject it to high vibration, shock or
(12) Output noise may be further reduced by installing an external fi lter. Do not exceed the maximum output
(13) The input must remain above the Undervoltage Shutdown (UVLO) voltage specifi cation at all times to avoid
Outline Dimensions
Weight
Safety
Input Voltage, Continuous or transient 36 Volts max.
Input Reverse Polarity Protection
Output Current
Storage Temperature
All specifi cations are typical unless noted. General conditions for Specifi cations are +25 deg.C ambient
temperature, Vin=nominal, Vout=nominal, full rated load. Adequate airfl ow must be supplied for extended
testing under power. See Derating curves.
All models are tested and specifi ed with no external capacitors. All models are stable and regulate within
spec under no-load conditions.
Input Back Ripple Current is tested and specifi ed over a 5 Hz to 20 MHz bandwidth. Input fi ltering is Cin=2 x
100 μF, Cbus=1000 μF, Lbus=1 μH. All caps are low ESR types.
Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airfl ow, the DC/DC converter will tolerate brief full current outputs if the total
RMS current over time does not exceed the Derating curve. All Derating curves are presented near sea level
altitude. Be aware of reduced power dissipation with increasing altitude.
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fi xed
conditions, Tpcboard=+25 deg.C, full output load, natural air convection.
The input and output are not isolated. They share a single COMMON power and signal return.
Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected
setting. Output current limit and short circuit protection are non-latching. When the overcurrent fault is
removed, the converter will immediately recover.
The output is not intended to sink appreciable reverse current.
“Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output.
If the overcurrent condition still exists, the restart current will be removed and then tried again. This short
current pulse prevents overheating and damaging the converter.
Input Fusing: If reverse polarity is accidentally applied to the input, to ensure reverse input protection,
always connect an external input fast-blow fuse in series with the +Vin input. Use approximately twice the
full input current rating with nominal input voltage.
from a nominal midpoint value to either extreme.
acceleration.
capacitance. At zero output current and no external capacitor, the output may contain low frequency
components which exceed the ripple specifi cation. The output may be operated indefi nitely with no load.
an unplanned turn off.
Fixed Output 1.5 Amp SIP DC/DC Converters
Absolute Maximum Ratings
01 Nov 2010 MDC_OKI-78SR-W36.A02 Page 4 of 10
OKI-78SR Series
Physical
See Mechanical Specifi cations [11]
0.07 ounces (2 grams)
Certifi ed to UL/cUL 60950-1
CSA-C22.2 No. 60950-1
IEC/EN 60950-1, 2nd Edition (pending)
None. Install external fuse.
Current-limited. Devices can withstand sustained
short circuit without damage.
-40 to +125 deg. C.
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