HPQ-3.3/50-D48 Series www.murata-ps.com Isolated High Power Quarter Brick DC-DC Converters Typical unit FEATURES PRODUCT OVERVIEW  nverters, shutdo shutdown, wn, an external remote On/Off c an external remote On/Off control may 3.3 Volts DC fi xed output up to 50 Amps Unique among quarter-brick DC-DC converters, the HPQ-3.3/50-D48 series offers very high output high output use e use either positive or nega ither positive or negat tive polarity ive polarity. . Remote  Industry standard quarter brick 2.3" x 1.45" x current (up to 50 Amps) in an industry standard Sense inputs compensate for resistive line drops at 0.40" open frame package “quarter brick” package requiring no heat sink. The high currents.  Wide range 36 to 75 Vdc input voltages with 2250 HPQ-3.3/50-D48 series delivers up to 165 Watts A wealth of self-protection features avoid prob- Volt Basic isolation fi xed voltage output for printed circuit board mount- lems with both the converter and external circuits.  Double lead-free assembly and attachment for RoHS ing. Wide range inputs on the 2.3" x 1.45" x 0.40" These include input undervoltage lockout and standards converter are 36 to 75 Volts DC (48 Volts nominal), overtemperature shutdown using an on-board tem- ideal for datacom and telecom systems. The fi xed perature sensor. Excessive overcurrents limit their  Up to 165 Watts total output power output voltage is regulated to within ±1% and may power using the “hiccup” autorestart technique  High effi ciency synchronous rectifi er topology be trimmed within ±10% of nominal output. and the outputs may be short-circuited indefi nitely.  Stable no-load operation with no required external Advanced automated surface mount assembly Additional safety features include output overvolt- components and planar magnetics deliver full magnetic and age protection and reverse conduction elimination. optical isolation with Basic protection up to 2250 The synchronous rectifi er topology offers high  Operating temperature range -40 to +85° C. with Volts. To power digital systems, the outputs offer effi ciency for minimal heat buildup and “no heat no heat sink required fast settling to current steps and tolerance of sink” operation. The HPQ-3.3/50-D48 series meets  Meets UL/EN 60950-1, CSA-C22.2 No. 60950-1, higher capacitive loads. Excellent ripple and noise safety certifi cations to UL/EN/IEC/CSA 60950-1, safety approvals, 2nd Edition specifi cations assure compatibility to CPU’s, ASIC’s, 2nd Edition and RFI/EMI conducted/radiated  Extensive self-protection, current limiting and shut programmable logic and FPGA’s. No minimum load emission compliance to EN55022-CISPR22 with down features is required. For systems needing controlled startup/ external fi lter. APPLICATIONS   Embedded systems, datacom and telecom Instrumentation systems, R&D platforms, auto- installations mated test fi xtures   Disk farms, data centers and cellular repeater sites Data concentrators, voice forwarding and speech processing systems  Remote sensor systems, dedicated controllers +SENSE (7) +VIN (1) +VOUT (8) SWITCH CONTROL −VOUT (4) –VIN −SENSE (3) INPUT UNDERVOLTAGE, INPUT (5) PULSE OVERVOLTAGE, AND OUTPUT TRANSFORMER OVERVOLTAGE COMPARATORS PWM OPTO REFERENCE & VOUT TRIM CONTROLLER ISOLATION ERROR AMP (6) REMOTE Figure 1. Simplifi ed Schematic ON/OFF Typical topology is shown CONTROL (2) For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 1 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input R/N (mV Regulation pk-pk) (Max.) ➁ Effi ciency Package IOUT IIN full VOUT (Amps, Power VIN Nom. Range IIN no load Dimensions Dimensions (Volts) max.) (Watts) Typ. Max. Line Load (Volts) (Volts) load (mA) (Amps) Min. Typ. (inches) (mm) Pinout Root Model ➀ H HPQ-3.3/50-D48 PQ-3.3/50-D48 3 3.3 .3 5 50 0 1 165 65 5 50 0 1 100 00 ± ±0.2% 0.2% ± ±0.2% 0.2% 4 48 8 3 36-75 6-75 8 80 0 3 3.82 .82 8 88% 8% 9 90% 0% 1 1.45x2.3x0.40 .45x2.3x0.40 3 36.8x58.4x10.2 6.8x58.4x10.2 P P32 32 ➀ Please refer to the part number structure for additional ordering information and options. ➁ All specifi cations are at nominal line voltage and full load, +25 deg.C. unless otherwise noted. See detailed specifi cations. Output capacitors are 1 μF ceramic || 10 μF electrolytic with no input caps.These caps are necessary for our test equipment and may not be needed for your application. PART NUMBER STRUCTURE HPQ - 3.3 / 50 D48 N B H Lx - C - RoHS Hazardous Materials compliance Family C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard Series: Y = RoHS-5 (with lead), optional, special quantity order High Power Pin length option Quarter Brick Blank = standard pin length 0.180 in. (4.6 mm) L1 = 0.110 in. (2.79 mm)* Nominal Output Voltage L2 = 0.145 in. (3.68 mm)* *Special quantity order is required; no sample quantities available. Conformal coating (optional) Maximum Rated Output : Blank = no coating, standard Current in Amps H = Coating added, optional, special quantity order Input Voltage Range: Baseplate (optional) D48 = 36-75 Volts (48V nominal) Blank = No baseplate, standard B = Baseplate installed, optional quantity order Note: On/Off Control Polarity Some model number combinations N = Negative polarity, standard may not be available. Please contact P = Positive polarity, optional Murata Power Solutions. www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 2 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters FUNCTIONAL SPECIFICATIONS ➀ Absolute Maximum Ratings Input Voltage Continuous 75 Volts max. Transient, 100 mS max. 100 Volts max. Output Power 166.6 Watts max. On/Off Control 0V. min. to +15 V. max. Input Reverse Polarity Protection None. Install external fuse. Current-limited. Output Current Devices can withstand sustained short circuit without damage. Storage Temperature -55 to +125 °C Lead Temperature See soldering guidelines. 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 nor recommended. All specifi cations are typical unless noted. See Note 1. Input Input Voltage Range See Ordering Guide. Recommended External Fuse 10 Amps fast blow Start-Up Voltage 33.0 Volts Undervoltage Shutdown 32.0 Volts Overvoltage Shutdown None, see application notes. Refl ected (Back) Ripple Current (Note 2) 20 mA pk-pk Internal Input Filter Type Pi-type Reverse Polarity Protection (Note 15) None. Install external fuse. Input Current: Full Load Conditions See Ordering Guide. 2 Inrush Transient 0.05 A Sec. Shutdown Mode (Off, UV, OT) 10 mA Output Short Circuit 50 mA No Load, 3.3Vout 80 mA Low Line (Vin=Vmin, 3.3Vout) 5.21 Amps Remote On/Off Control (Note 5) ON = +2.5 V. to +15 V. max. or open pin Positive Logic (“P” suffi x) OFF = 0 to +1 V. max. or ground pin ON = -0.1 V. to +0.8 V. max. or ground pin Negative Logic (“N” suffi x) OFF = +2.5 V. to +15 V. max. or open pin Current 1 mA www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 3 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters Output Minimum Loading No minimum load Maximum Output Power 166.6 Watts Accuracy (50% load) ±1 % of Vsetting. See note 16. Overvoltage Protection (Note 7) 4 Volts Temperature Coeffi cient ±0.02% per °C. of Vout range Ripple/Noise (20 MHz bandwidth) See Ordering Guide and note 8. Line/Load Regulation (See Tech. Notes) See Ordering Guide and note 10. Effi ciency See Ordering Guide Remote Sense Compensation +10% max. deviation from output Maximum Capacitive Loading, low ESR 10,000 μF max. See note 11. Current Limit Inception (98% of Vout setting) 59 Amps (after warm up) See note 12. Short Circuit Mode (Notes 6, 12) Short Circuit Current Output 5 Amps Protection Method Hiccup autorecovery upon overload removal. (See note 12) Short Circuit Duration Continuous, no damage (output shorted to ground) Isolation Isolation Voltage Input to Output 2250 Vdc min. Input to Baseplate 1500 Vdc min. Baseplate to Output 1500 Vdc min. Isolation Resistance 10 Megohms Isolation Capacitance 1000 pF Isolation Safety Rating Basic insulation Dynamic Characteristics Dynamic Load Response (see note 1) 200 μSec to within ±1% of fi nal value. (50-75-50% load step) Turn-On Time 10 mSec for Vout regulated Remote On/Off Time 10 mSec for Vout regulated Switching Frequency 400 ±40 KHz Environmental Calculated MTBF (Note 4) TBC Operating Temperature Range (no baseplate) -40 to +85 °C (with derating) Maximum Baseplate Operating Temperature +100 °C Storage Temperature Range -55 to +125 °C Thermal Protection/Shutdown +115 °C (Case temp. is measured in the center) Relative Humidity 85%/+85 °C Physical Outline Dimensions See Mechanical Specifi cations Weight (without baseplate) 1.06 ounces (30 grams) Electromagnetic Interference Meets EN55022, CISPR22, Class B, (may require external fi lter) conducted and radiated Meets UL/cUL 60950-1 Safety CSA-C22.2 No. 60950-1 IEC/EN 60950-1, 2nd Edition www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 4 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters Specifi cation Notes (1) All models are tested and specifi ed with external 1||10 μF output capacitors and no external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equip- ment and may not be required to achieve specifi ed performance in your applications. All models are stable and regulate within spec under no-load conditions. All specifi cations are typical unless noted. General conditions for Specifi cations are +25 °C, Vin=nominal, Vout=nominal, full load. Adequate airfl ow must be supplied for extended testing under power. (2) Refl ected Input Ripple Current is tested and specifi ed over a 5 Hz to 20 MHz bandwidth. Input fi ltering is Cin=33 μF, 100V, Cbus=220 μF, 100V electrolytic, Lbus=12 μH. (3) 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 at sea level altitude. Be aware of reduced power dissipation with increasing density altitude. (4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fi xed conditions, Tpcboard=+25 °C, full output load, natural air convection. (5) The On/Off Control is normally controlled by a switch, relay or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. (6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. (7) The output is not intended to sink appreciable reverse current. This may damage the outputs. (8) Output noise may be further reduced by adding an external fi lter. See I/O Filtering and Noise Reduction. (9) All models are fully operational and meet published specifi cations, including “cold start” at –40 °C. Maximum power requires that the package temperature of all on-board components must never exceed +128°C. (10) Regulation specifi cations describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. (11) The converter is normally specifi ed with the Input/Output fi ltering listed in Note 1. Higher capacitive load will reduce noise but at the expense of delayed settling time, extended turn-on time and slower tran- sient response. Use only as much output fi ltering as needed and no more. Thoroughly test your system under full load with all components installed. Low ESR capacitors with high capacitance may degrade dynamic performance. (12) “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 repeating pulse prevents overheating and damaging the converter. Output current limit and short circuit protection is non-latching. Once the fault is removed, the converter immediately recovers normal operation. (13) Do not exceed maximum power specifi cations when adjusting the output trim. (14) At zero output current, the output may contain low frequency components which exceed the ripple specifi cation. The output may be operated indefi nitely with no load. (15) Input Fusing: To ensure reverse input protection, always connect an external input fast-blow fuse in series with the +Vin input. (16) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-fi lm resistors. (17.) Always connect the sense pins. If they are not connected to a remote load, wire each sense pin to its respective voltage output at the converter pins. www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 5 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters TYPICAL PERFORMANCE DATA Effi ciency vs Line Voltage and Load Current @ +25°C Maximum Current Temperature Derating (Vin=48V, no baseplate, longitudinal air fl ow) 95 24 50 22 45 90 20 18 VIN = 75 V 40 85 16 VIN = 48 V 35 100 LFM VIN = 36 V 14 80 200 LFM 12 30 300 LFM 10 400 LFM 75 8 25 Power Dissipation 6 70 VIN = 48 V 20 4 65 2 15 5 1015 20253035 404550 Load Current (Amps) 10 30 40 50 60 70 80 Ambient Temperature (°C) Maximum Current Temperature Derating (Vin=48V, with baseplate, longitudinal air fl ow) 60 50 40 100 LFM 200 LFM 30 300 LFM 400 LFM 20 10 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 6 of 11 Efficiency (%) Output Current (Amps) Loss (Watts) Output Current (Amps) HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters TYPICAL PERFORMANCE DATA Transient Response Transient Response (25% Load Step) Transient Response (50% Load Step) Enable Start-up Enable Start-up (Vin=48V Iout=50A) Enable Start-up (Vin=48V Iout=0A) Ripple and Noise (1uF Ceramic plus 10uF Tantalum) Ripple Waveform (Vin=48V Iout=0A) Ripple Waveform (Vin=48V Iout=50A) www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 7 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS 1.860 (47.2) A Dimensions are in inches (mm) shown for ref. only. Third Angle Projection 1.00 1.45 (25.4) (36.8) Screw length must not Tolerances (unless otherwise specified): go through .XX ± 0.02 (0.5) baseplate. .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. BASEPLATE #M3-THREAD X 0.15 DEEP TYPICAL (4) PLACES Optional baseplate 0.50 (12.7) 0.015 (0.4) With Baseplate min. clearance 0.40 (10.2) between highest Without Baseplate component and pin shoulders 0.18 PINS 1-3, 5-7: 0.040 ±0.001 (1.016 ±0.025) (4.6) PINS 4 & 8: 0.060 ±0.001 (1.52 ±0.025) Component locations DOSA-Compliant I/O Connections (pin side view) are typical and may Pin Function P32 Pin Function P32 vary between models. 2.30 (58.4) A 1 +Vin 5 –Sense 2.00 (50.8) 2 Remote On/Off Control 6 Trim A 3 –Vin 7 +Sense 4 –Vout 8 +Vout Important! Always connect the sense pins. If they are not con- 3 4 nected to a remote load, wire each sense pin to its respective 5 voltage output at the converter pins. 0.600 (15.2) 1.30 2 6 4 EQ. SP. (33.0) Standard pin length is shown. Please refer to the part number @ 0.150 (3.8) 7 structure for alternate pin lengths. 1 8 Optional mounting holes, 4 places 2.15 (54.6) BOTTOM VIEW www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 8 of 11 B B B HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters Start-Up Threshold and Undervoltage Shutdown TECHNICAL NOTES Under normal start-up conditions, these converters will not begin to regulate Removal of Soldered Converters from Printed Circuit Boards properly until the ramping input voltage exceeds the Start-Up Threshold. Once Should removal of the converter from its soldered connection be needed, operating, devices will turn off when the applied voltage drops below the Und- thoroughly de-solder the pins using solder wicks or de-soldering tools. At no ervoltage Shutdown point. Devices will remain off as long as the undervoltage time should any prying or leverage be used to remove converters that have not condition continues. Units will automatically re-start when the applied voltage been properly de-soldered fi rst. is brought back above the Start-Up Threshold. The hysteresis built into this function avoids an indeterminate on/off condition at a single input voltage. See Input Source Impedance Performance/Functional Specifi cations table for actual limits. These converters must be driven from a low ac-impedance input source. The Start-Up Time DC-DC’s performance and stability can be compromised by the use of highly inductive source impedances. The input circuit shown in Figure 2 is a practical The VIN to VOUT Start-Up Time is the interval between the point at which a solution that can be used to minimize the effects of inductance in the input ramping input voltage crosses the Start-Up Threshold voltage and the point at traces. For optimum performance, components should be mounted close to the which the fully loaded output voltage enters and remains within its specifi ed DC-DC converter. regulation band. Actual measured times will vary with input source imped- ance, external input capacitance, and the slew rate and fi nal value of the input I/O Filtering, Input Ripple Current, and Output Noise voltage as it appears to the converter. The On/Off to VOUT start-up time assumes All models in this Series are tested/specifi ed for input ripple current (also called that the converter is turned off via the Remote On/Off Control with the nominal input refl ected ripple current) and output noise using the circuits and layout input voltage already applied. shown in Figures 2 and 3. External input capacitors (CIN in Figure 2) serve On/Off Control primarily as energy-storage elements. The primary-side, Remote On/Off Control function can be specifi ed to operate They should be selected for bulk capacitance (at appropriate frequencies), with either positive or negative polarity. Positive-polarity devices ("P" suffi x) low ESR, and high rms-ripple-current ratings. The switching nature of DC-DC are enabled when the on/off pin is left open or is pulled high. Positive-polarity converters requires that dc voltage sources have low ac impedance as highly devices are disabled when the on/off pin is pulled low (with respect to –Input). inductive source impedance can affect system stability. In Figure 2, CBUS and Negative-polarity devices are off when the on/off pin is high and on when the LBUS simulate a typical dc voltage bus. Your specifi c system confi guration may on/off pin is pulled low. See Figure 4. necessitate additional considerations. Dynamic control of the remote on/off function is best accomplished with a me- In critical applications, output ripple and noise (also referred to as periodic and chanical relay or an open-collector/open-drain drive circuit (optically isolated if random deviations or PARD) may be reduced by adding fi lter elements such appropriate). The drive circuit should be able to sink appropriate current (see as multiple external capacitors. Be sure to calculate component temperature Performance Specifi cations) when activated and withstand appropriate voltage rise from refl ected AC current dissipated inside capacitor ESR.All external when deactivated. capacitors should have appropriate voltage ratings and be located as close to the converter as possible. Temperature variations for all relevant parameters should be taken into consideration. The most effective combination of external I/O capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. TO CURRENT OSCILLOSCOPE 7 +SENSE PROBE 1 8 +VIN +VOUT LBUS + SCOPE RLOAD VIN CBUS CIN C1 C2 – 4 3 –VOUT –VIN 5 See specs for component values. –SENSE C1 = 1μF Figure 2. Measuring Input Ripple Current C2 = 10μF TANTALUM LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple/Noise (PARD) www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 9 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters Sense Input temperature (See Performance Specifi cations), a precision temperature sensor will power down the unit. When the internal temperature decreases below the Note: The sense and VOUT lines are internally connected through low-value re- threshold of the temperature sensor, the unit will self start. sistors. Nevertheless, if sense is not used for remote regulation, the user must connect + sense to + VOUT and -sense to -VOUT at the converter pins. Sense is Output Overvoltage Protection intended to correct small output accuracy errors caused by the resistive ohmic The output voltage is monitored for an overvoltage condition via magnetic coupling drop in output wiring as output current increases. This output drop (the differ- to the primary side. If the output voltage rises to a fault condition, which could be ence between Sense and VOUT when measured at the converter) should not be damaging to the load circuitry (see Performance Specifi cations), the sensing cir- allowed to exceed 0.5V. cuitry will power down the PWM controller causing the output voltage to decrease. Sense is connected at the load and corrects for resistive errors only. Be careful Following a time-out period the PWM will restart, causing the output voltage to where it is connected. Any long, distributed wiring and/or signifi cant inductance ramp to its appropriate value. If the fault condition persists, and the output volt- introduced into the Sense control loop can adversely affect overall system stabil- ages again climb to excessive levels, the overvoltage circuitry will initiate another ity. If in doubt, test the application, and observe the DC-DC’s output transient shutdown cycle. This on/off cycling is referred to as “hiccup” mode. response during step loads. There should be no appreciable ringing or oscilla- Input Reverse-Polarity Protection tion. You may also adjust the output trim slightly to compensate for voltage loss in any external fi lter elements. Do not exceed maximum power ratings. If the input-voltage polarity is accidentally reversed, an internal diode will be- come forward biased and likely draw excessive current from the power source. Current Limiting If the source is not current limited or the circuit appropriately fused, it could When power demands from the output falls within the current limit inception cause permanent damage to the converter. range for the rated output current, the DC-DC converter will go into a current Input Fusing limiting mode. In this condition the output voltage will decrease proportionately with increases in output current, thereby maintaining a somewhat constant power Certain applications and/or safety agencies may require the installation of dissipation. This is commonly referred to as power limiting. Current limit inception fuses at the inputs of power conversion components. Fuses should also be is defi ned as the point where the full-power output voltage falls below the specifi ed used if the possibility of a sustained, non-current-limited, input-voltage polarity tolerance. If the load current being drawn from the converter is signifi cant enough, reversal exists. For these converters, fast-blow fuses are recommended with the unit will go into a short circuit condition. See “Short Circuit Condition.” values no greater than twice the maximum input current. Short Circuit Condition Trimming Output Voltage When a converter is in current limit mode the output voltages will drop as the These converters have a trim capability that enables users to adjust the output output current demand increases. If the output voltage drops too low, the mag- voltage over a limited range (refer to the trim equations). Adjustments to the out- netically coupled voltage used to develop primary side voltages will also drop, put voltage can be accomplished with a single fi xed resistor as shown in Figures thereby shutting down the PWM controller. Following the specifi ed time-out 5 and 6. A single fi xed resistor can increase or decrease the output voltage period, the PWM will restart, causing the output voltages to begin ramping to their depending on its connection. Resistors should be located close to the converter appropriate values. If the short-circuit condition persists, another shutdown and have TCR’s less than 100ppm/°C to minimize sensitivity to changes in cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The temperature. If the trim function is not used, leave the trim pin open. hiccup cycling reduces the average output current, thereby preventing internal On standard units, a single resistor connected from the Trim pin to the +Sense temperatures from rising to excessive levels. This converter is capable of will increase the output voltage. A resistor connected from the Trim Pin to the enduring an indefi nite short circuit output condition. –Sense will decrease the output voltage. Thermal Shutdown Trim adjustments greater than the specifi ed trim range can have an adverse These converters are equipped with thermal-shutdown circuitry. If the internal affect on the converter’s performance and are not recommended. Excessive temperature of the DC-DC converter rises above the designed operating voltage differences between VOUT and Sense, in conjunction with trim adjust- ment of the output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifi cations for overvoltage limits). EQUIVALENT CIRCUIT FOR 1 + VIN +Vcc POSITIVE AND NEGATIVE Temperature/power derating is based on maximum output current and voltage LOGIC MODELS at the converter’s output pins. Use of the trim and sense functions can cause 2 output voltages to increase, thereby increasing output power beyond the O N /O F F CONTROL converter’s specifi ed rating, or cause output voltages to climb into the output C O N TR O L overvoltage region. Therefore: (VOUT at pins) x (IOUT)  rated output power REF 3 –VIN COMMON The Trim pin is a relatively high impedance node that can be susceptible to noise pickup when connected to long conductors in noisy environments. Figure 4. Driving the Remote On/Off Control Pin www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 10 of 11 HPQ-3.3/50-D48 Series Isolated High Power Quarter Brick DC-DC Converters +VOUT +VOUT +VIN +VIN +SENSE +SENSE ON/OFF ON/OFF TRIM LOAD TRIM LOAD CONTROL CONTROL RTRIM DOWN RTRIM UP –SENSE –SENSE –VIN –VOUT –VIN –VOUT Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors Trim Up Trim Down HPQ-3.3/50-D48 16.863(1+∆) 5.11 5.11 – –10.22 –10.22 RT (k7) = RT (k7) = UP DOWN 1.225x∆ ∆ ∆ where ∆ is the absolute value of 3.3 - VOUT () 3.3 (∆ is always positive) 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 NOTICE—Please use only this customer data sheet as product documentation The pinout (Pxx) and case (Cxx) designations (typically P65 or C59) refer to when laying out your printed circuit boards and applying this product into your a generic family of closely related information. It may not be a single pinout application. Do NOT use other materials as offi cial documentation such as adver- or unique case outline. Please be aware of small details (such as Sense pins, tisements, product announcements, or website graphics. Power Good pins, etc.) or slightly different dimensions (baseplates, heat sinks, etc.) which may affect your application and PC board layouts. Study the We strive to have all technical data in this customer data sheet highly accurate Mechanical Outline drawings, Input/Output Connection table and all footnotes and complete. This customer data sheet is revision-controlled and dated. The very carefully. Please contact Murata Power Solutions if you have any ques- latest customer data sheet revision is normally on our website (www.murata- tions. ps.com) for products which are fully released to Manufacturing. Please be especially careful using any data sheets labeled “Preliminary” since data may change without notice. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 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. © 2013 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_HPQ-3.3/50-D48 Series.B01 Page 11 of 11