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PRODUCT OVERVIEW
OKY-T/10 & T/16-W5 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Typical Typical unit
FEATURES
Wide 2.4-5.5 VDC input range Non-isolated output adjustable from 0.7525 to 3.63 Volts up to 16 Amps DOSA-compatible SMT package Drives 1000 μF ceramic capacitive loads Optional sequence/tracking operation Outstanding thermal performance and derating Short circuit protection On/Off control High efficiency with no heatsink Over temperature protection Designed to meet UL/EN/IEC 60950-1 safety approvals.
The OKY-T/10 and -T/16 series are SMT nonisolated 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 2.4 to 5.5 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 programmable 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 temperature 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 and Oscillograms – OKY2-T/16-W5 Tape and Reel Information
Page 1 2 3 4 5 6 9 16
Simplified Block Diagram
+Vin F1 +Vout
On/Off Control
Sense Controller
External DC Power Source
Trim Open = On Closed = Off ( Positive On/Off) Common Reference and Error Amplifier
Common
Figure 1. OKY-T/10, -T/16
Sequence/Tracking (OKY2 only)
Note: Murata Power Solutions strongly recommends an external input fuse, F1. See specifications.
For full details go to www.murata-ps.com/rohs
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22 Mar 2010
email: sales@murata-ps.com
MDC_OKY_T10T16.W5.A03 Page 1 of 16
OKY-T/10 & T/16-W5 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Performance Specifications and Ordering Guide
ORDERING GUIDE On/Off Polarity Sequence/ Tracking Output VOUT (Volts) 0.7525-3.63 0.7525-3.63 Input Package, C83
Model Number OKY-T/10-W5P-C OKY-T/10-W5N-C
R/N (mVp-p) Regulation (Max.) VIN Efficiency c IOUT IIN, IIN, (Amps Power Nom. Range no load full load max) (Watts) Max. f Line Load (Volts) (Volts) (mA) (Amps) Min. Typ. 10 10 10 10 16 16 16 16 33.0 33.0 33.0 33.0 52.8 52.8 52.8 52.8 20 20 20 20 50 50 50 50 ±0.2% ±0.2% ±0.2% ±0.2% ±0.2% ±0.2% ±0.2% ±0.2% ±1% ±1% ±1% ±1% ±1% ±1% ±1% ±1% 5 5 5 5 5 5 5 5 2.4-5.5 2.4-5.5 2.4-5.5 2.4-5.5 2.4-5.5 2.4-5.5 2.4-5.5 2.4-5.5 80 80 80 80 80 80 80 80 7.58 7.58 7.58 7.58 11.12 11.12 11.12 11.12 92% 92% 92% 92% 95% 95% 95% 95%
Case ➄ 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3) 1.3x0.53x0.33 (33x13.5x8.3)
Pinout P66 P66 P66 P66 P66 P66 P66 P66
Pos. Neg. Pos. Neg. Pos. Neg. Pos. Neg.
No No Yes Yes No No Yes Yes
OKY2-T/10-W5P-C 0.7525-3.63 OKY2-T/10-W5N-C 0.7525-3.63 OKY-T/16-W5P-C OKY-T/16-W5N-C 0.7525-3.63 0.7525-3.63
92.5% 95% 92.5% 95% 92.5% 95% 92.5% 95%
OKY2-T/16-W5P-C 0.7525-3.63 OKY2-T/16-W5N-C 0.7525-3.63
➀ ➁
Efficiency is shown at Vout=1V..
All specifications are at nominal line voltage, Vout=nominal (3.3V) and full load, +25 deg.C. unless otherwise noted. Output capacitors are 1 μF ceramic and 10 μF electrolytic in parallel. Input cap is 22 μF. See detailed specifications. I/O caps are necessary for our test equipment and may not be needed for your application.
➂ Use adequate ground plane and copper thickness adjacent to the converter. f Ripple and Noise (R/N) is shown at Vout=1V. See specs for details. g Dimensions are in inches (mm).
PART NUMBER STRUCTURE
OK Y 2 - T / 16 - W5 P - C
Okami Non-isolated PoL Surface Mount Sequence/tracking Blank=Not installed, delete seq/track contact 2=Installed, add seq/track contact Trimmable Output Voltage Range W5 Models = 0.7525-3.63V RoHS Hazardous Substance Compliance C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder) On/Off Polarity P = Positive Polarity N = Negative Polarity
Input Voltage Range W5 = 2.4-5.5V
Maximum Rated Output Current in Amps
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22 Mar 2010
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MDC_OKY_T10T16.W5.A03 Page 2 of 16
OKY-T/10 & T/16-W5 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
MECHANICAL SPECIFICATIONS
PIN #1 THIS CORNER (FARSIDE)
TOP VIEW
[13.5] 0.53 REF [12.7] 0.50
ISOMETRIC VIEW
[6.9] 0.27
NOZZLE PICKUP POINT
SIDE VIEW MTG PLANE
[3.05] 0.120 [33.0] 1.30 [19.3] 0.760 REF 4x [4.83] 0.190
[8.4] 0.33
END VIEW
PIN #1 [1.60] 0.063
3 BOTTOM VIEW 2
4
5
6
7
[10.29] 0.405 [13.5] 0.53
[0.64] 0.025
[29.9] 1.177
1
[1.22] 0.048
[1.91] 0.075 [33.0] 1.30 REF [29.9] 1.177 [26.85] 1.057 [22.02] 0.867
[.064] 0.025
[3.05] 0.120 MIN [3.43] 0.135 MAX [1.91] 0.075
[13.5] 0.53 REF [2.41] 0.095 MIN [2.79] 0.110 MAX
2 3 4 56 7
1
[7.54] 0.297 [12.37] 0.487 [17.20] 0.677
[10.29] 0.405
DIMENSIONS ARE IN INCHES [mm] TOLERANCES: x.xxx .02 in. x.xx .010 in. ANGLES: 1
[1.22] 0.048
RECOMMENDED PAD LAYOUT
COMPONENTS SHOWN ARE FOR REFERENCE ONLY MATERIAL: SMT PINS: COPPER ALLOY
THIRD ANGLE PROJECTION
Case C83
I/O CONNECTIONS Pin Function P66 1 On/Off Control * 2 +Vin 3 Vtrack Seq** 4 Gnd (Common) 5 +Vout 6 Trim 7 Sense * The Remote On/Off can be provided with either positive (P suffix) or negative (N suffix) polarity. ** Vtrack Seq applies only to OKY2 models. No connection for OKY models.
FINISH: (ALL PINS) GOLD (5u"MIN) OVER NICKEL (50u" MIN)
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MDC_OKY_T10T16.W5.A03 Page 3 of 16
OKY-T/10 & T/16-W5 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Performance and Functional Specifications
See Note 1
Input Dynamic Characteristics
Input Voltage Range Isolation Start-Up Voltage Undervoltage Shutdown (see Note 15) Overvoltage Shutdown Reflected (Back) Ripple Current (Note 2) Internal Input Filter Type Recommended External Fuse Reverse Polarity Protection Input Current: Full Load Conditions 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 suffix) Current Positive Logic (“P” model suffix)
See Ordering Guide and Note 7. Not isolated 2.05V (OKY-T/16-W5) 1.90 V (OKY-T/16-W5) None 20 mA pk-pk Capacitive 10A ( OKY-T/10-W5) 15A ( OKY-T/16-W5) N/A. See fuse information. See Ordering Guide 0.4 A2Sec. 5 mA 60 mA 5.41A. (OKY-T/10-W5) 14.63A. (OKY-T/16-W5) ON = Open pin or ground to +0.4V. max. OFF = +1.5V min. to +Vin max. 1 mA ON = Open pin (internally pulled up) or +1.5Vdc to +Vin max. OFF = Ground pin to +0.4V. max. 1 mA
Dynamic Load Response 100μSec max. to within ±2% of final value (50-100% load step, di/dt = 1A/μSec) with 2 x 150 μF polymer external caps. Start-Up Time (Vin on or On/Off to Vout regulated) Switching Frequency 8 mSec for Vout=nominal (Vin On) 6 mSec for Vout=nominal (Remote On/Off) 300 KHz
Environmental
Calculated MTBF Telecordia method (4a) Calculated MTBF MIL-HDBK-217N2 method (4b)
TBD TBD
Operating Temperature Range (Ambient, vertical mount) 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%/+85°C., non-condensing
Physical
Outline Dimensions Weight Safety Restriction of Hazardous Substances MSL Rating
Current
See Mechanical Specifications 0.1 ounces (2.8 grams) Designed to meet UL/cUL 60950-1, CSAC22.2 No. 60950-1, IEC/EN 60950-1 RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder) 2
Output
Output Power Minimum Loading Accuracy (50% load, untrimmed) Voltage Output Range (Note 13) Overvoltage Protection (Note 16) Temperature Coefficient Ripple/Noise (20 MHz bandwidth) Line/Load Regulation Efficiency 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 Short Circuit Duration Prebias Startup Tracking/Sequencing Slew Rate Tracking accuracy, rising input Tracking accuracy, falling input
36W (OKY-T/10-W5) 52.8W (OKY-T/16-W5) No minimum load ±2 % of Vnominal 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 5,000 μF (min. cap. load 0 μF) 16A ( OKY-T/10-W5) 39A ( OKY-T/16-W5) 1A (OKY-T/10-W5) 2A (OKY-T/16-W5) 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. 2 Volts per millisecond, max. Vout = ±200 mV max. of Sequence In Vout = ±400 mV max. of Sequence In
(1)
Absolute Maximum Ratings
Input Voltage (Continuous or transient) On/Off Control Input Reverse Polarity Protection Output Current (Note 7)
0 V.to +5.8 Volts max. 0 V. min. to +Vin max. See Fuse section 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 or recommended.
Specification Notes:
Specifications are typical at +25 °C, Vin=nominal (+5V.), Vout=nominal (+3.3V), 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 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) (3) 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. 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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MDC_OKY_T10T16.W5.A03 Page 4 of 16
OKY-T/10 & T/16-W5 Series
Programmable DOSA-SMT 10/16-Amp DC/DC Converters
Specification Notes, Cont.:
(5) The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced to -Input Common. A logic gate may also be used by applying appropriate external voltages which do not exceed +Vin. Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. For W5 models, the Input Voltage must exceed the Output Voltage at all times by 0.5 Volts or greater. Output noise may be further reduced by adding an external filter. At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load. All models are fully operational and meet published specifications, including “cold start” at –40° C.
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Your production environment may differ therefore please thoroughly review these guidelines with your process engineers.
(6) (7) (8)
(9)
Reflow Solder Operations for surface-mount products (SMT)
(10) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. (11) Other input or output voltage ranges will be reviewed under scheduled quantity special order. (12) Maximum PC board temperature is measured with the sensor in the center of the converter. (13) Do not exceed maximum power specifications when adjusting the output trim. (14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will reduce output noise but may change the transient response. Newer ceramic caps with very low ESR may require lower capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please refer to the Output Capacitive Load Application Note. (15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times. Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will attempt to recover when the input is brought back into normal operating range. (16) The outputs are not intended to sink appreciable reverse current. (17) “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. Once the fault is removed, the converter immediately recovers normal operation.
For Sn/Ag/Cu based solders: Preheat Temperature Time over Liquidus Maximum Peak Temperature Cooling Rate For Sn/Pb based solders: Preheat Temperature Time over Liquidus Maximum Peak Temperature Cooling Rate Less than 1 ºC. per second 60 to 75 seconds 235 ºC. Less than 3 ºC. per second Less than 1 ºC. per second 45 to 75 seconds 260 ºC. Less than 3 ºC. per second
Recommended Lead-free Solder Reflow Profile
250 Peak Temp. 235-260° C
Temperature (°C)
Output Voltage Adustment The output voltage may be adjusted over a limited range by connecting an external trim resistor (Rtrim) between the Trim pin and Ground. The Rtrim resistor must be a 1/10 Watt precision metal film type, ±1% accuracy or better with low temperature coefficient, ±100 ppm/oC. or better. Mount the resistor close to the converter with very short leads or use a surface mount trim resistor. In the tables below, the calculated resistance is given. Do not exceed the specified limits of the output voltage or the converter’s maximum power rating when applying these resistors. Also, avoid high noise at the Trim input. However, to prevent instability, you should never connect any capacitors to Trim.
200
150 Soaking Zone 120 sec max 100
