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기능 Programmable DOSA-SMT 10/16-Amp DC/DC Converters
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OKY2-T-16-D12N-C 데이터시트, 핀배열, 회로
www.murata-ps.com
OKY-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Typical unit
FEATURES
Wide 8.3-14 VDC input range
Non-isolated output adjustable from 0.7525 to
5.5 Volts up to 16 Amps
DOSA-compatible SMT package
Optional sequence/tracking operation
Outstanding thermal performance and derating
Short circuit protection
On/Off control
High efficiency up to 94.5%
Over temperature protection
Meets UL/EN/IEC 60950-1 safety approvals.
PRODUCT OVERVIEW
The OKY-T/10 and -T/16 series are miniature
SMT non-isolated Point-of-Load (POL) DC/DC power
converters for embedded applications. The module
is fully compatible with Distributed-power Open
Standards Alliance (DOSA) industry-standard
specifications (www.dosapower.com). Applications
include powering CPU’s, datacom/telecom systems,
programmable logic and mixed voltage systems.
The wide input range is 8.3 to 14 Volts DC. Two
maximum output currents are offered, 10 Amps
(T/10 models) or 16 Amps (T/16 models). Based
on fixed-frequency synchronous buck converter
switching topology, the high power conversion
efficient Point of Load (POL) module features pro-
grammable output voltage and On/Off control. An
optional Sequence/Tracking input allows controlled
ramp-up and ramp-down outputs. The Sense input
provides remote sense. These converters also
include under voltage lock out (UVLO), output short
circuit protection, over-current and over tempera-
ture protections.
These units are designed to meet all standard
UL/EN/IEC 60950-1 safety and FCC EMI/RFI
emissions certifications and RoHS-6 hazardous
substance compliance.
Contents
Description, Connection Diagram, Photograph
Ordering Guide, Model Numbering
Mechanical Specifications, Input/Output Pinout
Detailed Electrical Specifications
Output Voltage Adjustment, Soldering Guidelines
Application Notes
Performance Data – OKY2-T/10-D12
Performance Data and Oscillograms – OKY2-T/16-D12
Tape and Reel Information
Product Label, MTBF Table
Page
1
2
3
4
5
6
9
11
16
17
+Vin
F1
On/Off
Control
Controller
External
DC
Power
Source
Open = On
Closed = Off
(Positive
On/Off)
Common
Sequence/Tracking (OKY2 only)
Simplified Block Diagram
t4XJUDIJOH
t'JMUFST
t$VSSFOU4FOTF
Reference and
Error Amplifier
+Vout
Sense
Trim
Figure 1. OKY-T/10, -T/16
Common
Note: Murata Power Solutions strongly recommends an external input fuse, F1.
See specifications.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_OKY_T10T16.D12.A08 Page 1 of 17




OKY2-T-16-D12N-C pdf, 반도체, 판매, 대치품
OKY-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Performance and Functional Specifications
See Note 1
Input
Input Voltage Range
See Ordering Guide.
Start-Up Voltage
8.00V
Undervoltage Shutdown (see Note 15) 7.75V)
Overvoltage Shutdown
None
Reflected (Back) Ripple Current (Note 2) 20 mA pk-pk
Internal Input Filter Type
Capacitive
Recommended External Fuse
15A (T/10); 20A (T/16)
Reverse Polarity Protection
N/A. See fuse information
Input Current:
Full Load Conditions
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output in Short Circuit
No Load
Low Line (Vin=Vmin, Vout=Vnom)
See Ordering Guide
0.4 A2Sec.
5 mA
100 mA (T/10); 60 mA (T/16)
80 mA
6.34 A (T/10);10.2 A (T/16)
Remote On/Off Control (Note 5)
Negative Logic (“N” model suffix)
Positive Logic (“P” model suffix)
Current
ON = Open pin or ground to +0.3V. max.
OFF =+2.5V min. to + Vin (max)
ON = Open pin to +Vin max.
(internally pulled up)
OFF = Ground pin to +0.3V. max.
1 mA max.
Tracking/Sequencing
Slew Rate
Tracking accuracy, rising input
Tracking accuracy, falling input
2 Volts per millisecond, max.
Vout = +/-100 mV of Sequence In
Vout = +/-200 mV of Sequence In
General and Safety
Efficiency
See Ordering Guide
Switching Frequency
300 KHz ± 25 kHz
Start-Up Time (Vin on to Vout regulated) 8 mSec for Vout=nominal
(On/Off to Vout regulated)
8 mSec for Vout=nominal
Isolation
Not isolated
Safety
Meets UL/cUL 60950-1,
CSA-C22.2 No. 60950-1, IEC/EN 60950-1
Calculated MTBF
See table on page 17.
Output
Output Voltage Range
0.7525 to 5.5 V
Minimum Loading
No minimum load
Accuracy (50% load, untrimmed)
±2 % of Vnominal
Overvoltage Protection (Note 16)
None
Temperature Coefficient
±0.02% per oC of Vout range
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation
See Ordering Guide and note 8
See Ordering Guide and note 10
Maximum Capacitive Loading (Note 14)
Cap-ESR=0.001 to 0.01 Ohms 1,000 μF
Cap-ESR >0.01 Ohms
5,000 μF
Current Limit Inception (Note 6)
27 Amps (T/10); 33 Amps (T/16)
(98% of Vout setting, after warm up)
Short Circuit Mode
Short Circuit Current Output
Protection Method
2A
Hiccup autorecovery upon overload
removal. (Note 17)
Output, continued
Short Circuit Duration
Continuous, no damage
(output shorted to ground)
Prebias Startup
Converter will start up if the external
output voltage is less than Vset
Dynamic Load Response
75 μSec max. to within ±2% of final value
(50-100% load step, di/dt=2.5A/μSec)
Environmental
Operating Temperature Range (Ambient)
See derating curves
-40 to +85° C. with derating (Note 9)
Operating PC Board Temperature
-40 to +100° C. max.,
no derating (12)
Storage Temperature Range
-55 to +125° C.
Thermal Protection/Shutdown
+130° C.
Relative Humidity
to 85%RH/+85° C., non-condensing
Physical
Outline Dimensions
See Mechanical Specifications
Weight
0.1 ounces (2.8 grams)
Electromagnetic Interference
Designed to meet FCC part 15, class B,
EN55022 and CISPR22 class B radiated
(may need external filter)
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 +15 Volts max. (D12 models)
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 deg.C, Vin=nominal (+12V. for D12 models), Vout=nominal (+5V for D12
models), full load, external caps and natural convection unless otherwise indicated. Extended tests at higher
power must supply substantial forced airflow.
All models are tested and specified with external 1 μF paralleled with 10 μF 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.
(4) Deleted
www.murata-ps.com/support
MDC_OKY_T10T16.D12.A08 Page 4 of 17

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OKY2-T-16-D12N-C 전자부품, 판매, 대치품
OKY-T/10 & T/16-D12 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
+SENSE
+OUTPUT
COPPER STRIP
C1
C2 SCOPE
RLOAD
-OUTPUT
COPPER STRIP
C1 = 1μF CERAMIC
C2 = 10μF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple and Noise (PARD)
up to the shutdown temperature, an on-board electronic temperature sensor
will power down the unit. When the temperature decreases below the turn-on
threshold, the converter will automatically restart. There is a small amount of
temperature hysteresis to prevent rapid on/off cycling.
CAUTION: If you operate too close to the thermal limits, the converter may
shut down suddenly without warning. Be sure to thoroughly test your applica-
tion to avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable
under increasing forced airflow measured in Linear Feet per Minute (“LFM”).
Note that these are AVERAGE measurements. The converter will accept brief
increases in current or reduced airflow as long as the average is not exceeded.
Note that the temperatures are of the ambient airflow, not the converter
itself which is obviously running at higher temperature than the outside air.
Also note that very low flow rates (below about 25 LFM) are similar to “natural
convection”, that is, not using fan-forced airflow.
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated airflow. We use both thermocouples and an
infrared camera system to observe thermal performance.
CAUTION: If you routinely or accidentally exceed these Derating guidelines,
the converter may have an unplanned Over Temperature shut down. Also, these
graphs are all collected at slightly above Sea Level altitude. Be sure to reduce
the derating for higher density altitude.
Output Current Limiting
Current limiting inception is defined as the point at which full power falls
below the rated tolerance. See the Performance/Functional Specifications.
Note particularly that the output current may briefly rise above its rated value
in normal operation as long as the average output power is not exceeded. This
enhances reliability and continued operation of your application. If the output
current is too high, the converter will enter the short circuit condition.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as the
output current demand increases. If the output voltage drops too low (approxi-
mately 98% of nominal output voltage for most models), the PWM controller
will shut down. Following a time-out period, the PWM will restart, causing the
output voltage to begin ramping up to its appropriate value. If the short-circuit
condition persists, another shutdown cycle will initiate. This rapid on/off cycling
is called “hiccup mode”. The hiccup cycling reduces the average output cur-
rent, thereby preventing excessive internal temperatures and/or component
damage. A short circuit can be tolerated indefinitely.
Remote Sense Input
The Sense input is normally connected at the load for the respective Sense
polarity (+Sense to the +Vout load). The sense input compensates for voltage
drops along the output wiring such as moderate IR drops and the current
carrying capacity of PC board etch. This output drop (the difference between
Sense and Vout when measured at the converter) should not exceed 0.5V. Use
heavier connections if this drop is excessive. The sense input also improves the
stability of the converter and load system by optimizing the control loop phase
margin.
If the Sense function is not used for remote regulation, the user should con-
nect the Sense to their respective Vout at the converter pins.
Sense lines on the PCB should run adjacent to DC signals, preferably
Ground. Any long, distributed wiring and/or significant inductance introduced
into the Sense control loop can adversely affect overall system stability. If in
doubt, test your applications by observing the converter’s output transient
response during step loads. There should not be any appreciable ringing or
oscillation.
Do not exceed maximum power ratings. Excessive voltage differences
between Vout and Sense together with trim adjustment of the output can cause
the overvoltage protection circuit to activate and shut down the output.
Power derating of the converter is based on the combination of maximum
output current and the highest output voltage at the ouput pins. Therefore the
designer must insure:
(Vout at pins) x (Iout) ≤ (Max. rated output power)
Remote On/Off Control
The remote On/Off Control can be ordered with either polarity. Please refer to
the Connection Diagram on page 1 for On/Off connections.
Positive polarity models are enabled when the On/Off pin is left open or is
pulled high to +Vin with respect to –Vin. Therefore, the On/Off control can be
disconnected if the converter should always be on. Positive-polarity devices are
disabled when the On/Off is grounded or brought to within a low voltage (see
Specifications) with respect to –Vin.
Negative polarity devices are on (enabled) when the On/Off pin is left open
or brought to within a low voltage (see Specifications) with respect to –Vin. The
device is off (disabled) when the On/Off is pulled high (see Specifications) with
respect to –Vin.
www.murata-ps.com/support
MDC_OKY_T10T16.D12.A08 Page 7 of 17

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OKY2-T-16-D12N-C

Programmable DOSA-SMT 10/16-Amp DC/DC Converters

Murata
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