The SemiQ Series of dc-dc converters provides a high- efficiency single output in a size that is only 60% of industry- standard quarter-bricks, while preserving the same pinout and functionality. In high temperature environments, for output voltages ranging from 3.3 V to 1.0 V, the thermal performance of SemiQ converters exceeds that of most competitors 20-25 A quarter- bricks. This performance is accomplished through the use of patent-pending circuit, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a very low body profile. Low body profile and the preclusion of heat sinks minimize RoHS lead-free solder and lead-solder-exempted products are airflow shadowing, thus enhancing cooling for downstream available devices. The use of 100% automation for assembly, coupled with Delivers up to 15A (50W) advanced electronic circuits and thermal design, results in a Industry-standard quarter-brick pinout product with extremely high reliability. Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0, 1.8, 1.5, 1.2, Operating from a 36-75 V input, the SQ48 Series converters and 1.0 V provide any standard output voltage from 12 V down to 1.0 V. Available in through-hole and SMT packages Outputs can be trimmed from 20% to +10% of the nominal Low profile: 0.258 (6.55 mm) output voltage ( 10% for output voltages 1.2 V and 1.0 V), thus providing outstanding design flexibility. Low weight: 0.53 oz (15 g) On-board input differential LC-filter With a standard pinout and trim equations, the SQ48 Series Startup into pre-biased output converters are perfect drop-in replacements for existing quarter- brick designs. Inclusion of this converter in new designs can No minimum load required result in significant board space and cost savings. In both cases Meets Basic Insulation requirements the designer can expect reliability improvement over other Withstands 100 V input transient for 100 ms available converters because of the SQ48 Series optimized Fixed-frequency operation thermal efficiency. Fully protected Remote output sense Positive or negative logic ON/OFF option Telecommunications Output voltage trim range: +10%/20% with industry-standard Data Communications trim equations (except 1.2 V and 1.0 V outputs with trim range Wireless Communications 10%) Servers Output voltage trim range: +10%/20% with industry-standard trim equations (except 1.2 V and 1.0 V outputs with trim range 10%) High efficiency no heat sink required nd Safety according to IEC/EN 60950-1 2 Edition and UL/CSA For output voltages ranging from 3.3 to 1.0 V, 40% higher nd current capability at elevated temperatures than most 60950-1 2 Edition competitors 20-25A quarter-bricks Designed to meet Class B conducted emissions per FCC and 2 EN55022 when used with external filter Extremely small footprint: 0.896 x 2.30 (2.06 in ), 40% All materials meet UL94, V-0 flammability rating smaller than conventional quarter-bricks North America +1-866.513.2839 Asia-Pacific +86.755.29885888 Europe, Middle East +353 61 225 977 tech.support psbel.com belpowersolutions.com 2015 Bel Power Solutions, inc. BCD.00637 AA Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=33 F, 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 Undervoltage 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 1.0 - 3.3 V 160 pF 5.0 - 6.0 V 260 pF 8.0 - 12 V 230 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 415 kHz Industry-std. equations (1.5 - 12V) -20 +10 % 1 Output Voltage Trim Range Use trim equation on Page 4 (1.0 -1.2 V) -10 +10 % 1 Remote Sense Compensation Percent of VOUT(NOM) +10 % Output Overvoltage Protection Non-latching ( 1.5 12 V) 117 122 127 % Non-latching (1.0 -1.2 V) 124 132 140 % Auto-Restart Period Applies to all protection features 100 ms Turn-On Time See Figures F, G and H 4 ms ON/OFF Control (Positive Logic) Converter Off (logic low) -20 0.8 VDC Converter On (logic high) 2.4 20 VDC ON/OFF Control (Negative Logic) Converter Off (logic high) 2.4 20 VDC Converter On (logic low) -20 0.8 VDC Additional Notes: 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function. However, the total output voltage trim from all sources should not exceed 10% of V (NOM), in order to ensure specified operation of overvoltage protection circuitry. OUT These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. In many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. The addition of a 33 F electrolytic capacitor with an ESR < 1 across the input 866.513.2839 tech.support psbel.com belpowersolutions.com 2015 Bel Power Solutions, inc. BCD.00637 AA