HPQ Series Isolated High Power Quarter Brick DC/DC Converters Typical unit FEATURES PRODUCT OVERVIEW n 3.3 Volts DC fixed output up to 50 Amps n Industry standard quarter brick 2.3" x 1.45" x 0.39" open frame package n Wide range 36 to 75 Vdc input voltages with 2250 Volt Basic isolation n Double lead-free assembly and attachment for RoHS standards n Up to 165 Watts total output power Unique among quarter-brick DC/DC converters, the HPQ series offers very high output current (up to 50 Amps) in an industry standard “quarter brick” package requiring no heat sink. The HPQ series delivers up to 165 Watts fixed voltage output for printed circuit board mounting. Wide range inputs on the 2.3" x 1.45" x 0.39" converter are 36 to 75 Volts DC (48 Volts nominal), ideal for datacom and telecom systems. The fixed output voltage is regulated to within ±1% and may be trimmed within ±10% of nominal output. Advanced automated surface mount assembly and planar magnetics deliver full magnetic and optical isolation with Basic protection up to 2250 Volts. To power digital systems, the outputs offer fast settling to current steps and tolerance of higher capacitive loads. Excellent ripple and noise specifications assure compatibility to CPU’s, ASIC’s, programmable logic and FPGA’s. No minimum load is required. For systems needing controlled startup/ n High efficiency synchronous rectifier topology n Stable no-load operation with no required external components n Operating temperature range -40 to +85° C. with no heat sink required n Designed to meet UL/EN 60950-1, CSA-C22.2 No. 60950-1, safety approvals n Extensive self-protection, current limiting and shut down features shutdown, an external remote On/Off control may use either positive or negative polarity. Remote Sense inputs compensate for resistive line drops at high currents. A wealth of self-protection features avoid problems with both the converter and external circuits. These include input undervoltage lockout and overtemperature shutdown using an on-board temperature sensor. Excessive overcurrents limit their power using the “hiccup” autorestart technique and the outputs may be short-circuited indefinitely. Additional safety features include output overvoltage protection and reverse conduction elimination. The synchronous rectifier topology offers high efficiency for minimal heat buildup and “no heat sink” operation. The HPQ series is designed to meet full safety certifications to UL/EN/IEC/CSA 60950-1 and RFI/EMI conducted/radiated emission compliance to FCC part 15 class B. APPLICATIONS n Embedded systems, datacom and telecom installations n Disk farms, data centers and cellular repeater sites n Remote sensor systems, dedicated controllers n Instrumentation systems, R&D platforms, automated test fixtures n Data concentrators, voice forwarding and speech processing systems +SENSE (7) +VIN (3) +VOUT (8) SWITCH CONTROL −VOUT (4) –VIN (1) PULSE TRANSFORMER PWM CONTROLLER REMOTE ON/OFF CONTROL (2) OPTO ISOLATION INPUT UNDERVOLTAGE, INPUT OVERVOLTAGE, AND OUTPUT OVERVOLTAGE COMPARATORS REFERENCE & ERROR AMP −SENSE (5) VOUT TRIM (6) Figure 1. Simplified Schematic Typical topology is shown For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 1 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters ORDERING GUIDE ➀ Output Input R/N (mV pk-pk) Iout Vout (Amps, Power (Volts) max.) (Watts) Typ. Max. Root Model ➀ HPQ-3.3/50-D48N-C 3.3 50 165 50 Regulation (Max.) ➁ Line Iin full Vin Nom. Range Iin no load Load (Volts) (Volts) load (mA) (Amps) 100 ±0.2% ±0.2% 48 36-75 80 3.82 Efficiency Package Min. Typ. Dimensions (inches) 88% 90% 1.45x2.3x0.39 Dimensions (mm) Pinout 36.8x58.4x9.9 P32 ➀ Please refer to the part number structure for additional ordering information and options. ➁ All specifications are at nominal line voltage and full load, +25 deg.C. unless otherwise noted. See detailed specifications. 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. 1.860 (47.2) B MECHANICAL SPECIFICATIONS B A Dimensions are in inches (mm shown for ref. only). Third Angle Projection 1.45 (36.8) 1.00 (25.4) Screw length must not go through baseplate. Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .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) With Baseplate 0.40 (10.2) Without Baseplate 0.015 (0.4) min. clearance between highest component and pin shoulders Function P32 Neg. Input Remote On/Off Control Pos. Input Neg. Output Pin 5 6 7 8 Function P32 Neg. Sense Output Trim Pos. Sense Pos. Output Important! 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. 2.30 (58.4) Component locations are typical and may vary between models. A 2.00 (50.8) A B Pin 1 2 3 4 0.18 (4.6) PINS 1-3, 5-7: 0.040 ±0.001 (1.016 ±0.025) PINS 4 & 8: 0.060 ±0.001 (1.52 ±0.025) I/O Connections (pin side view) 1 1.30 (33.0) 4 5 6 7 8 2 3 0.600 (15.2) 4 EQ. SP. @ 0.150 (3.8) Optional mounting holes, 4 places 2.15 (54.6) BOTTOM VIEW www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 2 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters PART NUMBER STRUCTURE HPQ - 3.3 / 50 - D48 N B Family Series: High Power Quarter Brick Nominal Output Voltage Maximum Rated Output : Current in Amps Input Voltage Range: D48 = 36-75 Volts (48V nominal) H -C RoHS Hazardous Materials compliance C = RoHS-6 (no lead), standard Y = RoHS-5 (with lead), optional, special quantity order Conformal coating (optional) Blank = no coating, standard H = Coating added, optional, special quantity order Baseplate (optional) Blank = No baseplate, standard B = Baseplate installed, optional quantity order On/Off Control Polarity N = Negative polarity, standard P = Positive polarity, optional Note: Some model combinations may not be available. Contact Murata Power Solutions for availability. Performance and Functional Specifications All specifications are typical unless noted. See Note 1. Input Input Voltage Range See Ordering Guide. Recommended External Fuse 10 Amps Start-Up Voltage 33.0 Volts Undervoltage Shutdown 32.0 Volts Overvoltage Shutdown None, see application notes. Reflected (Back) Ripple Current (Note 2) Internal Input Filter Type 20 mA pk-pk Pi-type Reverse Polarity Protection (Note 15) See fuse information Input Current: Full Load Conditions See Ordering Guide. Inrush Transient 0.05 A2Sec. 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) Positive Logic (“P” suffix) ON = +2.5 V. to +15 V. max. or open pin OFF = 0 to +1 V. max. or ground pin Negative Logic (“N” suffix) ON = -0.1 V. to +0.8 V. max. or ground pin OFF = +2.5 V. to +15 V. max. or open pin Current 1 mA www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 3 of 10 HPQ 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 Coefficient ±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. Efficiency See Ordering Guide Remote Sense Compensation +10% max. deviation from output Maximum Capacitive Loading, low ESR Current Limit Inception (98% of Vout setting) 10,000 µF max. See note 11. 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 200 µSec to within ±1% of final 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 -40 to +85 °C (with derating) Storage Temperature Range -55 to +125 °C Thermal Protection/Shutdown (Case temp. is measured in the center) Relative Humidity +115 °C 85%/+85 °C Physical Outline Dimensions See Mechanical Specifications Weight 1.06 ounces (30 grams) Electromagnetic Interference (may require external filter) FCC Part 15, EN55022, Class B, conducted and radiated UL/cUL 60950-1 CSA-C22.2 No. 60950-1 IEC/EN 60950-1 Safety (designed to meet) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 4 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters Absolute Maximum Ratings Input Voltage Continuous or transient 75 Volts max. Output Power 166.6 Watts max. On/Off Control 0V. min. to +15 V. max. Input Reverse Polarity Protection See Fuse section Current-limited. Devices can withstand sustained short circuit without damage. Output Current Storage Temperature -55 to +125 °C Lead Temperature +280 °C, 10 seconds max Absolute maximums are stress ratings. Exposure of devices to 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. CAUTION: This product is not internally fused. To comply with safety agency certifications and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals. See fuse information. Specification Notes (1) All models are tested and specified 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 equipment and may not be required to achieve specified performance in your applications. All models are stable and regulate within spec under no-load conditions. All specifications are typical unless noted. General conditions for Specifications are +25 °C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under power. (2) Reflected Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering 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 airflow, 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 fixed 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 outputs are not intended to sink appreciable reverse current. This may damage the outputs. (8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction. (9) All models are fully operational and meet published specifications, 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 specifications 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 specified with the Input/Output filtering listed in Note 1. Higher capacitive load will reduce noise but at the expense of delayed settling time, extended turn-on time and slower transient response. Use only as much output filtering 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 specifications when adjusting the output trim. (14)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. (15)Input Fusing: If reverse polarity is accidentally applied to the input, a body diode will become forward biased and will conduct considerable current. 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. (16)Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-film 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 Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 5 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters Technical Notes Removal of Soldered Converters from Printed Circuit Boards Should removal of the converter from its soldered connection be needed, thoroughly de-solder the pins using solder wicks or de-soldering tools. At no time should any prying or leverage be used to remove boards that have not been properly de-soldered first. ductor capacitors (www.sanyo.com) can be especially effective for further reduction of ripple/noise. 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. Our Applications Engineers can recommend potential solutions. Start-Up Threshold and Undervoltage Shutdown These converters must be driven from a low ac-impedance input source. The 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 solution that can be used to minimize the effects of inductance in the input traces. For optimum performance, components should be mounted close to the DC/DC converter. Under normal start-up conditions, these converters will not begin to regulate properly until the ramping input voltage exceeds the Start-Up Threshold. Once operating, devices will turn off when the applied voltage drops below the Undervoltage Shutdown point. Devices will remain off as long as the undervoltage condition continues. Units will automatically re-start when the applied voltage 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 Performance/Functional Specifications table for actual limits. I/O Filtering, Input Ripple Current, and Output Noise Start-Up Time All models in this Series are tested/specified for input ripple current (also called input reflected ripple current) and output noise using the circuits and layout shown in Figures 2 and 3. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements. The VIN to VOUT Start-Up Time is the interval between the point at which a ramping input voltage crosses the Start-Up Threshold voltage and the point at which the fully loaded output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input capacitance, and the slew rate and final value of the input voltage as it appears to the converter. The On/Off to VOUT start-up time assumes that the converter is turned off via the Remote On/Off Control with the nominal input voltage already applied. Input Source Impedance They should be selected for bulk capacitance (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The switching nature of DC/DC converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specific system configuration may necessitate additional considerations. In critical applications, output ripple/noise (also referred to as periodic and random deviations or PARD) can be reduced below specified limits using filtering techniques, the simplest of which is the installation of additional external output capacitors. Output capacitors function as true filter elements and should be selected for bulk capacitance, low ESR, and appropriate frequency response. In Figure 3, the two copper strips simulate real-world pcb impedances between the power supply and its load. Scope measurements should be made using BNC connectors or the probe ground should be less than ½ inch and soldered directly to the fixture. All external 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. OS-CONTM organic semicon- On/Off Control The primary-side, Remote On/Off Control function can be specified to operate with either positive or negative polarity. Positive-polarity devices ("P" suffix) are enabled when the on/off pin is left open or is pulled high. Positive-polarity devices are disabled when the on/off pin is pulled low (with respect to –Input). Negative-polarity devices are off when the on/off pin is high and on when the on/off pin is pulled low. See Figure 4. Dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). The drive circuit should be able to sink appropriate current (see Performance Specifications) when activated and withstand appropriate voltage when deactivated. +SENSE +OUTPUT TO OSCILLOSCOPE 3 CBUS C2 SCOPE RLOAD +INPUT –OUTPUT CIN –SENSE – 1 COPPER STRIP 8 C1 LBUS + VIN CURRENT PROBE 7 –INPUT See specs for component values. Figure 2. Measuring Input Ripple Current www.murata-ps.com 4 5 COPPER STRIP C1 = 1µF CERAMIC C2 = 10µF TANTALUM LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple/Noise (PARD) Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 6 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters Sense Input Note: The sense and Vout lines are internally connected through low-value resistors. 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 intended to correct small output accuracy errors caused by the resistive ohmic drop in output wiring as output current increases. This output drop (the difference between Sense and VOUT when measured at the converter) should not be allowed to exceed 0.5V. Sense is connected at the load and corrects for resistive errors only. Be careful where it is connected. Any long, distributed wiring and/or significant inductance introduced into the Sense control loop can adversely affect overall system stability. If in doubt, test the application, and observe the DC/DC’s output transient response during step loads. There should be no appreciable ringing or oscillation. You may also adjust the output trim slightly to compensate for voltage loss in any external filter elements. Do not exceed maximum power ratings. Current Limiting When power demands from the output falls within the current limit inception range for the rated output current, the DC/DC converter will go into a current limiting mode. In this condition the output voltage will decrease proportionately with increases in output current, thereby maintaining a somewhat constant power dissipation. This is commonly referred to as power limiting. Current limit inception is defined as the point where the full-power output voltage falls below the specified tolerance. If the load current being drawn from the converter is significant enough, the unit will go into a short circuit condition. See “Short Circuit Condition.” temperature (See Performance Specifications), a precision temperature sensor will power down the unit. When the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. Output Overvoltage Protection The output voltage is monitored for an overvoltage condition via magnetic coupling to the primary side. If the output voltage rises to a fault condition, which could be damaging to the load circuitry (see Performance Specifications), the sensing circuitry will power down the PWM controller causing the output voltage to decrease. Following a time-out period the PWM will restart, causing the output voltage to ramp to its appropriate value. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. This on/off cycling is referred to as “hiccup” mode. Input Reverse-Polarity Protection If the input-voltage polarity is accidentally reversed, an internal diode will become forward biased and likely draw excessive current from the power source. If the source is not current limited or the circuit appropriately fused, it could cause permanent damage to the converter. Input Fusing Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. Fuses should also be used if the possibility of a sustained, non-current-limited, input-voltage polarity reversal exists. For these converters, slow-blow fuses are recommended with 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 output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following the specified time-out period, the PWM will restart, causing the output voltages to begin ramping to their appropriate values. If the short-circuit condition persists, another shutdown cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. This converter is capable of enduring an indefinite short circuit output condition. These converters have a trim capability that enables users to adjust the output voltage over a limited range (refer to the trim equations). Adjustments to the output voltage can be accomplished with a single fixed resistor as shown in Figures 5 and 6. A single fixed resistor can increase or decrease the output voltage depending on its connection. Resistors should be located close to the converter and have TCR’s less than 100ppm/°C to minimize sensitivity to changes in temperature. If the trim function is not used, leave the trim pin open. Thermal Shutdown These converters are equipped with thermal-shutdown circuitry. If the internal temperature of the DC/DC converter rises above the designed operating ).054 %15)6!,%.4#)2#5)4&/2 0/3)4)6%!.$.%'!4)6% ,/')#-/$%,3 6 /./&& #/.42/, #/.42/, Trim adjustments greater than the specified trim range can have an adverse affect on the converter’s performance and are not recommended. Excessive voltage differences between VOUT and Sense, in conjunction with trim adjustment of the output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Temperature/power derating is based on maximum output current and voltage at the converter’s output pins. Use of the trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter’s specified rating, or cause output voltages to climb into the output overvoltage region. Therefore: 2%& n).054 Standard units have a “positive trim” where a single resistor connected from the Trim pin to the +Sense will increase the output voltage. A resistor connected from the Trim Pin to the –Sense will decrease the output voltage. #/--/. (VOUT at pins) x (IOUT) ≤ rated output power 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 Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 7 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters 1 +OUTPUT –INPUT +SENSE 2 ON/OFF CONTROL TRIM +OUTPUT –INPUT +SENSE 7 2 6 LOAD ON/OFF CONTROL TRIM –SENSE 5 3 +INPUT –OUTPUT 4 7 6 LOAD +INPUT –OUTPUT 5 4 Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors 8 RTRIM DOWN RTRIM UP –SENSE 3 1 8 Trim Up Trim Down HPQ-3.3/50-D48 RT UP (k7) = 16.863(1+∆) 1.225x ∆ 5.11 – ∆ –10.22 RTDOWN (k7) = 5.11 ∆ –10.22 where ∆ is the absolute value of 3.3 - VOUT ( ) 3.3 (∆ is always positive) TYPICAL PERFORMANCE CURVES HPQ-3.3/50-D48 HPQ-3.3/50-D48 Efficiency vs Line Voltage and Load Current @ +25°C Maximum Current Temperature Derating (Vin=48V, no baseplate, longitudinal air flow) 95 24 50 22 90 18 14 12 40 10 75 8 Power Dissipation VIN = 48 V 70 6 4 65 2 5 10 15 20 25 30 35 40 45 50 Load Current (Amps) Output Current (Amps) 80 16 Loss (Watts) VIN = 75 V VIN = 48 V VIN = 36 V 85 Efficiency (%) 45 20 35 100 LFM 200 LFM 300 LFM 400 LFM 30 25 20 15 10 30 40 50 60 70 80 Ambient Temperature (°C) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 8 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters 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=50A) Ripple Waveform (Vin=48V Iout=0A) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 9 of 10 HPQ Series Isolated High Power Quarter Brick DC/DC Converters Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: [email protected] ISO 9001 REGISTERED 06/02/08 08/19/08 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. Specifications are subject to change without notice. © 2008 Murata Power Solutions, Inc. www.murata-ps.com USA: Mansfield (MA), Tel: (508) 339-3000, email: [email protected] Canada: Toronto, Tel: (866) 740-1232, email: [email protected] UK: Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected] France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected] Germany: München, Tel: +49 (0)89-544334-0, email: [email protected] Japan: Tokyo, Tel: 3-3779-1031, email: [email protected] Osaka, Tel: 6-6354-2025, email: [email protected] China: Shanghai, Tel: +86 215 027 3678, email: [email protected] Guangzhou, Tel: +86 208 221 8066, email: [email protected] Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected] Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_HPQ Series.A05 Page 10 of 10