MURATA POWER SOLUTIONS OKR-T/50-W12-C
Specifications
Manufacturer
Murata Power Solutions
Manufacturers Part #
OKR-T/50-W12-C
Industry Aliases
OKR-T/50-W12-C
Series
OKR-T/50-W12-C
Factory Pack Quantity
75
Dimensions
1.45 x 1.10 x 0.64"
Efficiency
88.5%
Input Voltage Nominal
12 VDC
Mechanical Style
Non-Isolated / POL
Mounting
Through Hole
Operating Temperature
0 to + 70°C
Output Amps 1
50 A
Power
125 W
Subcategory
DC-DC Converter
Datasheet
Extracted Text
OKR-T/50-W12-C www.murata-ps.com Adjustable Output 50-Amp SIP-mount DC-DC Converters T Typical unit ypical unit FEATURES PRODUCT OVERVIEW The OKR-T/50-W12-C series are miniature SIP non-isolated Point-of-Load (PoL) DC-DC power convert- Wide input range: 6.5V to 13.8V ers measuring only 1.45 x 0.64 x 1.1 inches (36.8 x 16.2 x 27.9 mm). The wide input range is 6.5 to Wide trim range: 0.6V to 2.5V 13.8 Volts DC. Based on 450 KHz synchronous buck topology, the high power conversion effi cient Point High power density design means reduced of Load (PoL) module features programmable output voltage and On/Off control, under voltage lock out board space requirement (UVLO), overcurrent and over temperature protections. This unit is designed to meet all standard UL/EN/IEC 60950-1 safety certifi cations and RoHS-6 hazardous substance compliance. Power good output signal (open collector) Operating ambient temperature up to +70°C with suitable derating and forced air cooling Remote ON/OFF (active high) Input undervoltage lockout RoHS-6 hazardous substance compliance Figure 1. Connection Diagram +Vin +Vout • Switching F1 On/Off Control • Filters Controller • Current Sense External Trim DC Power Reference and Source Error Amplifier Common Common For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 1 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input IOUT R/N (mVp-p) ➁ Regulation (Max.) IIN, IIN, Effi ciency ➂ VOUT (Amps Power VIN Nom. Range no load full load Root Model (Volts) max) (Watts) Max. Line Load (Volts) (Volts) (mA) (Amps) ➂ Typ. Dimensions ➀ 1.45 x 0.64 x 1.1 OKR-T/50-W12-C 0.6-2.5 50 125 25 ±0.25% ±0.25% 12 6.5-13.8 150 8.5 88.5% (36.8 x 16.2 x 27.9) ➀ Dimensions (L x W x H) are in inches (mm). ➁ Ripple and Noise is shown at Vout = 1.8V. See specs for details. ➂ All specifi cations are at nominal line voltage, Vout = 1.8V and full load, +25°C. unless otherwise noted. Output capacitors are 10μF and two ceramic in parallel. Input cap is 22 μF. See detailed specifi cations. I/O caps are necessary for our test equipment and may not be needed for your application. PART NUMBER STRUCTURE OK R-/ T 50- W12 - C Okami Non-isolated PoL RoHS Hazardous Substance Compliance C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder) Wide Input Voltage Range SIP-Mount W12 = 6.5-13.8 Volts Output Voltage Range Maximum Rated Output T = Trimmable, 0.6-2.5 Volts Current in Amps www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 2 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters FUNCTIONAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Conditions Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 6.5 12 15 Vdc Output Power 127 W Current-limited, no damage, Output Current 050A short-circuit protected On/Off Control Vin Vdc Power Good Pin 7 Vdc Storage Temperature Range Vin = Zero (no power) -40 125 °C Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifi cations Table is not implied or recommended. INPUT Operating voltage range 6.5 12 13.8 Vdc Recommended External Fuse Fast blow 40 A Turn On/Start-up threshold Rising input voltage 5.8 6.1 6.4 Vdc Undervoltage Shutdown 4.8 5.3 5.8 Internal Filter Type C-Type Input current Full Load Conditions Vin = nominal (1.8Vset) 8.5 A Low Line Vin @ min, 1.8Vset 15.6 A 2 Inrush Transient 2A -Sec. Short Circuit Input Current 300 mA No Load Input Current 1.8V 150 mA Shut-Down Mode Input Current 20 mA Measured at input with specifi ed fi lter Refl ected (back) ripple current 12 mA, pk-pk Cin = 100μF, Cbus = 1000μF, Lbus = 1μH GENERAL and SAFETY Effi ciency 12Vin, 1.8Vout, 50A 87 88.5 % Certifi ed to UL-60950-1, CSA-C22.2 Safety Yes No.60950-1, IEC/60950-1, 2nd edition Per Telcordia SR332, issue 1 class 3, ground Calculated MTBF 7,476,403 Hours fi xed, Tambient = +25˚C Calculated MTBF Per Mil-HDBK-217N2 Method 11,076,048 Hours DYNAMIC CHARACTERISTICS Fixed Switching Frequency 450 KHz Startup Time 69 mS 1.8Vout (50% Load Step within 2% of Vset @ Dynamic Load Response 25 50 μSec 1A/μS; Cext = 10μF POSCAP) Dynamic Load Peak Deviation 150 200 mV Capacitive Loading Peak Deviation Settling Time 330μF Ceramic 180mV 30 μsec 830μF Cermaic, 1410μF Poscap 120mV 45 μsec FEATURES and OPTIONS Remote On/Off Control Positive Logic, ON state Pin pulled high 1.2 5 V Control Current, ON state 0.04 1.3 mA Positive Logic, OFF state Pin open or pulled low 0 0.7 V Control Current, OFF state open collector/drain 0 6 μA Remote Sense mV Power Good Option PGOOD, Open Drain Confi guration, Sinking: Vout window for PGOOD: Upper limit +8.3 +12.5 +16.2 % Vout window for PGOOD: Lower limit -15 -12.5 -9.2 % www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 3 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) OUTPUT Conditions Minimum Typical/Nominal Maximum Units Total Output Power 0 125 W Voltage Nominal Output Voltage Range See trim formula 0.6 2.5 Vdc Setting Accuracy At 50% load ±1 % of Vnom. Output Voltage Overshoot-Startup 0.5 % Vo set Current Output Current Range Continuous 0 50 A Current Limit Inception 98% of Vnom., after warmup 55 70 85 A Short Circuit Hiccup technique, autorecovery within ±1% Short Circuit Current 10 A of Vout Short Circuit Duration (remove short for Output shorted to ground, no damage recovery) Regulation Total Regulation Band -3 3 % Vo set Line Regulation Vin = min to max, output @ nominal load ±0.25 % Load Regulation Min load to max load ±0.25 % Ripple and Noise 1.8Vo, 12Vin 15 25 mV pk-pk Temperature Coeffi cient 0.02 % of Vnom./°C Maximum Capacitive Loading 1.8Vo 15000 μF MECHANICAL Outline Dimensions L x W x H 1.45 x 0.64 x 1.1 Inches 36.8 x 16.2 x 27.9 mm Weight 0.70 Ounces 20 Grams ENVIRONMENTAL full power, all output voltages, see derating Operating Ambient Temperature Range 070°C curves Storage Temperature Vin = Zero (no power) -40 125 °C RoHS rating RoHS-6 www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 4 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters OKR-T/50-W12-C PERFORMANCE DATA Effi ciency vs. Line Voltage and Load Current @ 25°C Maximum Current Temperature Derating @ Sea Level Vout = 1.8V (VIN = 12V, VOUT = 1.8V) 51 93 50 91 49 48 89 47 87 46 VIN = 6.5V 45 85 44 1.0 m/s (200 LFM) VIN = 12V 83 43 1.5 m/s (300 LFM) VIN = 13.8V 42 81 2.0 m/s (400 LFM) 41 2.5 m/s (500 LFM) 79 40 3.0 m/s (600 LFM) 39 77 38 75 37 36 73 35 71 34 33 69 32 2468 101214161820222426283032343638404244464850 30 35 40 45 50 55 60 65 70 75 80 85 Load Current (Amps) Ambient Temperature (°C) Thermal reference point 120°C max. Start-up from ENABLE: 1 Vin, 1.5 Vout, 0 A Iout 2100 μF (external Cout: [10 x 22uF]+[4 x Output Ripple and Noise (Vin = 12V, Vout = 1.8V, Iout = 50A, Cout = 10μ, Ta = +25°C) 47uF]). Trace 1 = Vin, Trace 2 = ENABLE, Trace 3 = Vout, Trace 4 =Power Good www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 5 of 14 Efficiency (%) Output Current (Amps) OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters OSCILLOGRAMS – Vout = 1.8V Step Load Transient Response (Vin = 6.5V, Vout = 1.8V, Cload = 10μF Step Load Transient Response (Vin = 6.5V, Vout = 1.8V, Cload = 10μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout POSCAP, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 12V, Vout = 1.8V, Cload = 10μF Step Load Transient Response (Vin = 12V, Vout = 1.8V, Cload = 10μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout POSCAP, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 13.8V, Vout = 1.8V, Cload = 10μF Step Load Transient Response (Vin = 13.8V, Vout = 1.8V, Cload = 10μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout POSCAP, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 6 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters OSCILLOGRAMS – Vout = 1.5V Step Load Transient Response (Vin = 6.5V, Vout = 1.5V, Cload = 2240μF Step Load Transient Response (Vin = 6.5V, Vout = 1.5V, Cload = 2240μF 15 x 22μF = 330μF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, 15 x 22μF = 330uF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 12V, Vout = 1.5V, Cload = 2240μF, Step Load Transient Response (Vin = 12V, Vout = 1.5V, Cload = 2240μF, 15 x 22μF = 330μF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, 15 x 22μF = 330μF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 13.8V, Vout = 1.5V, Cload = 2240μF, Step Load Transient Response (Vin = 13.8V, Vout = 1.5V, Cload = 2240μF, 15 x 22μF = 330μF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, 15 x 22μF = 330μF ceramic; 5 x 100μF = 500μF ceramic; 3 x 470μF = 1410μF POSCAP, Iout = 0A to 25A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 7 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters OSCILLOGRAMS – Vout = 1.2V Step Load Transient Response (Vin = 6.5V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 Step Load Transient Response (Vin = 6.5V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 ceramic caps for a total of 330μF, Iout = 0A to 25A [5A/μSec]) ceramic caps for a total of 330μF, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 12V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 ceramic Step Load Transient Response (Vin = 12V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 ceramic caps for a total of 330μF, Iout = 0A to 25A [5A/μSec]) caps for a total of 330μF, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Top trace = Vout, Bottom trace = Iout Step Load Transient Response (Vin = 13.8V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 Step Load Transient Response (Vin = 13.8V, Vout = 1.2V, Cload = 15 x 22μF/6.3V 1206 ceramic caps for a total of 330μF, Iout = 0A to 25A [5A/μSec]) ceramic caps for a total of 330μF, Iout = 25A to 50A [5A/μSec]) Top trace = Vout, Bottom trace = Iout Top trace = Vout, Bottom trace = Iout www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 8 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters MECHANICAL SPECIFICATIONS TOP VIEW INPUT/OUTPUT CONNECTIONS Pin Function J1 Vout+1 J2 Vout+1 J3 Vout+1 J4 PGND J5 PGND J6 Enable END VIEW J7 (-) Trim J8 Trim 16.2 J9 PGood 0.64 J10 -Sense FRONT VIEW J11 +Sense 36.8 11.6 J12 Vin+ 1.45 0.46 J13 Vin+ J14 Mechanical Support J15 Mechanical Support 27.9 1.10 2.92±0.25 2x 0.115±0.010 12345 678 910 11 12 13 2.06 14 15 0.081 0.76±0.05 2.00 13x 0.030±0.002 1.35 0.079 TYP 0.053 1.27 6.7 2x 0.050 20.00 2.85±0.25 0.27 0.787 13x 0.112±0.010 4.39 26.00 10.3 0.173 1.024 0.41 34.29 1.350 DIMENSIONS ARE IN INCHES [mm] TOLERANCES: 2 PLACE 0.02 ANGLES: 1 3 PLACE 0.010 COMPONENTS SHOWN ARE FOR REFERENCE ONLY MATERIAL: 0.030 HEADER PINS: COPPER ALLOY SUPPORT PINS: TIN PLATED BRASS Dimensions are in inches (mm shown for ref. only). FINISH: (ALL HEADER PINS) Third Angle Projection 200μ" MIN MATTE TIN OVER NICKEL (40μ" MIN) Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 9 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters MECHANICAL SPECIFICATIONS 37.34 1.470 0.89±0.08 13x 0.035±0.003 1.52 34.29 0.060 1.350 1.98±0.08 2x 0.078±0.003 2.06 0.081 2.06 0.081 5.92 17.96 0.233 12.12 0.707 0.477 2.00 0.079 TYP 4.39 26.00 0.173 1.024 www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 10 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters STANDARD PACKAGING )2$03$'6 ($&+67$7,&',66,3$7,9( 32/<(7+(1()2$075$< $&&2002'$7(6 &219(57(56 ,1$;$55$< &2558*$7(' &$5721 &/26('+(,*+7 67$1'$5'3$&.$*,1* Dimensions are in inches (mm shown for ref. only). Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 11 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters For best performance, we recommend installing a low-ESR capacitor TECHNICAL NOTES immediately adjacent to the converter’s input terminals. The capacitor should Input Fusing be a ceramic type such as the Murata GRM32 series or a polymer type. Initial suggested capacitor values are 10 to 22 μF, rated at twice the expected maxi- Certain applications and/or safety agencies may require fuses at the inputs of mum input voltage. Make sure that the input terminals do not go below the power conversion components. Fuses should also be used when there is the undervoltage shutdown voltage at all times. More input bulk capacitance may possibility of sustained input voltage reversal which is not current-limited. For be added in parallel (either electrolytic or tantalum) if needed. greatest safely, we recommend a fast blow fuse installed in the ungrounded input supply line. Recommended Output Filtering The installer must observe all relevant safety standards and regulations. For The converter will achieve its rated output ripple and noise with no additional safety agency approvals, install the converter in compliance with the end-user external capacitor. However, the user may install more external output capaci- safety standard, i.e. IEC/EN/UL 60950-1. tance to reduce the ripple even further or for improved dynamic response. Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors. Input Under-Voltage Shutdown and Start-Up Threshold Initial values of 10 to 47 μF may be tried, either single or multiple capacitors in Under normal start-up conditions, converters will not begin to regulate properly parallel. Mount these close to the converter. Measure the output ripple under until the ramping-up input voltage exceeds and remains at the Start-Up your load conditions. Threshold Voltage (see Specifi cations). Once operating, converters will not Use only as much capacitance as required to achieve your ripple and noise turn off until the input voltage drops below the Under-Voltage Shutdown Limit. objectives. Excessive capacitance can make step load recovery sluggish or Subsequent restart will not occur until the input voltage rises again above the possibly introduce instability. Do not exceed the maximum rated output capaci- Start-Up Threshold. This built-in hysteresis prevents any unstable on/off opera- tance listed in the specifi cations. tion at a single input voltage. Users should be aware however of input sources near the Under-Voltage Input Ripple Current and Output Noise Shutdown whose voltage decays as input current is consumed (such as All models in this converter series are tested and specifi ed for input refl ected capacitor inputs), the converter shuts off and then restarts as the external ripple current and output noise using designated external input/output com- capacitor recharges. Such situations could oscillate. To prevent this, make ponents, circuits and layout as shown in the fi gures below. In the fi gure below, sure the operating input voltage is well above the UV Shutdown voltage AT ALL the Cbus and Lbus components simulate a typical DC voltage bus. Please TIMES. note that the values of Cin, Lbus and Cbus will vary according to the specifi c converter model. Start-Up Time Assuming that the output current is set at the rated maximum, the Vin to Vout Start-Up Time (see Specifi cations) is the time interval between the point when TO CURRENT the ramping input voltage crosses the Start-Up Threshold and the fully loaded OSCILLOSCOPE PROBE regulated output voltage enters and remains within its specifi ed accuracy band. +VIN Actual measured times will vary with input source impedance, external input LBUS capacitance, input voltage slew rate and fi nal value of the input voltage as it + – appears at the converter. VIN CBUS CIN + These converters include a soft start circuit to moderate the duty cycle of its – PWM controller at power up, thereby limiting the input inrush current. GND The On/Off Remote Control interval from On command to Vout regulated CIN = 100μF, ESR < 700mΩ @ 100kHz assumes that the converter already has its input voltage stabilized above the CBUS = 1000μF, ESR < 100mΩ @ 100kHz Start-Up Threshold before the On command. The interval is measured from the LBUS = 1μH On command until the output enters and remains within its specifi ed accuracy Figure 3. Measuring Input Ripple Current band. The specifi cation assumes that the output is fully loaded at maximum rated current. Similar conditions apply to the On to Vout regulated specifi cation such as external load capacitance and soft start circuitry. Recommended Input Filtering The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. The converter will operate with no additional external capacitance if these conditions are met. www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 12 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters Output Current Limiting Current limiting inception is defi ned as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifi cations. Note par- +VOUT ticularly that the output current may briefl y 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 RLOAD SCOPE C1 too high, the converter will enter the short circuit condition. -VOUT 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 magnetically C1 = 10μF TANTALUM coupled voltage used to develop primary side voltages will also drop, thereby LOAD 2-3 INCHES (51-76mm) FROM MODULE shutting down the PWM controller. Following a time-out period, the PWM will restart, causing the output voltage to begin ramping up to its appropriate value. Figure 4. Measuring Output Ripple and Noise (PARD) 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 Minimum Output Loading Requirements average output current, thereby preventing excessive internal temperatures All models regulate within specifi cation and are stable under no load to full and/or component damage. A short circuit can be tolerated indefi nitely. load conditions. Operation under no load might however slightly increase output ripple and noise. The “hiccup” system differs from older latching short circuit systems because you do not have to power down the converter to make it restart. The Thermal Shutdown system will automatically restore operation as soon as the short circuit condi- To prevent many over temperature problems and damage, these converters tion is removed. include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/DC’s to rise above the Operating Temperature Range External Enable On/Off Control (see fi gure 5) up to the shutdown temperature, an on-board electronic temperature sensor The forced On/Off enable option uses positive logic for the external control. The will power down the unit. When the temperature decreases below the turn-on converter may be powered ON by applying a positive voltage (logic HI) between threshold, the converter will automatically restart. There is a small amount of the On/Off pin and the negative power input (-Vin). This positive voltage is hysteresis to prevent rapid on/off cycling. The temperature sensor is typically referred to –Vin and must be in the range of at least +2.0V and not to exceed located adjacent to the switching controller, approximately in the center of the the power supply input voltage (+Vin). The current drain is 12 mA max. when unit. See the Performance and Functional Specifi cations. turned on. CAUTION: If you operate too close to the thermal limits, the converter may If the On/Off pin is left open, an internal 100 Kilohm pulldown resistor will shut down suddenly without warning. Be sure to thoroughly test your applica- turn the converter OFF. The OFF condition may also be commanded by ground- tion to avoid unplanned thermal shutdown. ing the pin or from an external logic LO voltage not to exceed +0.4 Volts. All voltages are referred to the –Vin negative power input. Temperature Derating Curves If you wish to control the On/Off circuit by external logic rather than a switch, The graphs in this data sheet illustrate typical operation under a variety of carefully compare your logic threshold voltages with that of the On/Off input. conditions. The Derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable The circuit below indicates the equivalent input. Please avoid false signals under increasing forced airfl ow measured in Linear Feet per Minute (“LFM”). from ground bounce errors on the On/Off control. Note that these are AVERAGE measurements. The converter will accept brief Vin increases in current or reduced airfl ow as long as the average is not exceeded. Note that the temperatures are of the ambient airfl ow, not the converter itself which is obviously running at higher temperature than the outside air. Also note that very low fl ow rates (below about 25 LFM) are similar to “natural convection”, that is, not using fan-forced airfl ow. 10K Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airfl ow. 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. Figure 5. On/Off Control Circuit www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 13 of 14 OKR-T/50-W12-C Adjustable Output 50-Amp SIP-mount DC-DC Converters Trim Connections 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 (-)Trim. The Rtrim +VOUT resistor must be a 1/10 Watt precision metal fi lm type, ±0.5% accuracy or better with low temperature coeffi cient, ±100 ppm/oC. or better. Mount the RTRIM Trim resistor close to the converter with very short leads or use a surface mount RLOAD (-)Trim trim resistor. In the tables below, the calculated resistance is given. Do not exceed the Ground specifi ed 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 capaci- tors to Trim. Resistor Trim Equation, OKR-T/50-W12-C models: OKR-T/50-W12-C 1.2 ___________ RTRIM (kΩ) = (VOUT – 0.6) Output Voltage Calculated Rtrim (Ω) 2.5 V 632 1.8 V 1000 1.2 V 2000 0.6 V ∞ (open) Soldering Guidelines Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these specifi ca- tions may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C. Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 129 Flanders Road, Westborough, MA 01581 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_OKR-T/50-W12-C.A05 Page 14 of 14
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Bucher Emhart Glass
EXCELLENT SERVICE
With our strict fundamentals and high expectations, we were surprised when we came across GID Industrial and their competitive pricing. When we approached them with our issue, they were incredibly confident in being able to provide us with a seamless solution at the best price for us. GID Industrial quickly understood our needs and provided us with excellent service, as well as fully tested product to ensure what we received would be the right fit for our company.
Fuji
HARD TO FIND A BETTER PROVIDER
Our company provides services to aid in the manufacture of technological products, such as semiconductors and flat panel displays, and often searching for distributors of obsolete product we require can waste time and money. Finding GID Industrial proved to be a great asset to our company, with cost effective solutions and superior knowledge on all of their materials, it’d be hard to find a better provider of obsolete or hard to find products.
Applied Materials
CONSISTENTLY DELIVERS QUALITY SOLUTIONS
Over the years, the equipment used in our company becomes discontinued, but they’re still of great use to us and our customers. Once these products are no longer available through the manufacturer, finding a reliable, quick supplier is a necessity, and luckily for us, GID Industrial has provided the most trustworthy, quality solutions to our obsolete component needs.
Nidec Vamco
TERRIFIC RESOURCE
This company has been a terrific help to us (I work for Trican Well Service) in sourcing the Micron Ram Memory we needed for our Siemens computers. Great service! And great pricing! I know when the product is shipping and when it will arrive, all the way through the ordering process.
Trican Well Service
GO TO SOURCE
When I can't find an obsolete part, I first call GID and they'll come up with my parts every time. Great customer service and follow up as well. Scott emails me from time to time to touch base and see if we're having trouble finding something.....which is often with our 25 yr old equipment.
ConAgra Foods