The QmaXTM Series of high current single output DC-DC converters from Bel Power Solutions sets new standards for thermal performance and power density in the quarter brick pack-age. The 40A QM48T converters of the QmaXTM Series provide thermal performance in high temperature environments that is comparable to or exceeds the industrys leading 40A halfbricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal manage- ment and a very low body profile. RoHS lead-free solder and lead-solder-exempted The QM48T40 converters have a power density of up to 130 products are available W/in3, more than twice that of competitors 40A halfbricks. Delivers up to 40 A (132 W) Over 1 square inch of board space can be saved for every Industry-standard quarter brick pinout slot in which a 40A half-brick is replaced with a QM48T40 Higher current capability at 70C than most converter from Bel Power Solutions. competitors 40 A half-bricks On-board input differential LC-filter Low body profile and the preclusion of heat sinks minimize High efficiency no heat sink required impedance to system airflow, thus enhancing cooling for Start-up into pre-biased output downstream devices. The use of 100% automation for No minimum load required assembly, coupled with Bel Power Solutions advanced Low profile: 0.31 7.9 mm electric and thermal design, results in a product with Low weight: 1.06 oz 30 g typical extremely high reliability. Meets Basic Insulation requirements of EN60950 Operating from a 36-75 V input, the QmaXTM Series Withstands 100 V input transient for 100 ms converters provide standard output voltage for 3.3 V. Fixed-frequency operation Output can be trimmed from 20% to +10% of the nominal Fully protected output voltage, thus providing outstanding design flexibility. Remote output sense Output voltage trim range: +10%/20% with Industry- standard trim equations High reliability: MTBF of 2.6 million hours, calculated per Telcordia TR-332, Method I Case 1 Positive or negative logic ON/OFF option UL 60950 recognition in US and Canada and DEMKO certification per IEC/EN 60950 Meets conducted emissions requirements of FCC Class B and EN 55022 Class B with external filter All materials meet UL94, V-0 flammability rating North America +1-866.513.2839 Asia-Pacific +86.755.29885888 Europe, Middle East +353 61 225 977 tech.support psbel.com 2015 Bel Power Solutions, Inc. BCD.00632 AA QM48T40033 Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified. A PARAMETER NOTES MIN TYP MAX UNITS ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 0 80 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C INPUT CHARACTERISTICS Operating Input Voltage Range 36 48 75 VDC Input Under Voltage Lockout Non-latching Turn-on Threshold 33 34 35 VDC Turn-off Threshold 31 32 33 VDC Input Voltage Transient 100 ms 100 VDC ISOLATION CHARACTERISTICS I/O Isolation 2000 VDC Isolation Capacitance 1.4 nF Isolation Resistance 10 M FEATURE CHARACTERISTICS Switching Frequency 415 kHz 1 Output Voltage Trim Range Industry-std. equations on page 5 -20 +10 % 1 Remote Sense Compensation Percent of VOUT(NOM) +10 % Output Over-Voltage Protection Non-latching 117 128 140 % Auto-Restart Period Applies to all protection features 100 ms Turn-On Time 4 ms Converter Off -20 0.8 VDC ON/OFF Control (Positive Logic) Converter On 2.4 20 VDC Converter Off 2.4 20 VDC ON/OFF Control (Negative Logic) Converter On -20 0.8 VDC INPUT CHARACTERISTICS Maximum Input Current 40 ADC, 3.3 VDC Out 36 VDC In 4.1 ADC Input Stand-by Current Vin = 48 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 48 V, converter enabled 63 mADC Input Reflected-Ripple Current 25MHz bandwidth 7.5 mAPK-PK Input Voltage Ripple Rejection 120Hz 64 dB OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) 3.267 3.300 3.333 VDC Over Line 2 5 mV Output Regulation Over Load 2 5 mV 2 Output Voltage Range Over line, load and temperature 3.250 3.350 VDC Output Ripple and Noise - 25MHz bandwidth Full load + 10 F tantalum + 1 F ceramic 30 50 mV PK-PK External Load Capacitance Plus full load (resistive) 40,000 F Output Current Range 0 40 ADC Current Limit Inception Non-latching 42 47 52 ADC Peak Short-Circuit Current Non-latching. Short=10m . 50 60 A RMS Short-Circuit Current Non-latching 10 15 Arms DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 1 A/ S Co = 470 F tantalum + 1 F ceramic 120 mV Setting Time to 1% 80 s 866.513.2839 tech.support psbel.com 2015 Bel Power Solutions, Inc. BCD.00632 AA