The SemiQ Family of DC-DC converters provide 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, the thermal performance of SemiQ converters exceeds that of most competitors quarter-bricks. This 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 airflow shadowing, thus enhancing cooling for downstream devices. The use of 100% automation for assembly, coupled with advanced electrical and thermal design results in a product with extremely high reliability. With a standard pinout and trim equations, the SQ24 Series converters are perfect drop-in replacements for existing quarter-brick designs. Inclusion of this converter in new designs can result in significant board space and cost savings. The device is also available in a surface mount package. In both cases the designer can expect reliability improvement over other available converters because of the SQ24 Series optimized thermal efficiency. 19-36 VDC Input 15 VDC Output 3.3 A Extremely small footprint: 0.896 x 2.30 (2.06 in2), 40% smaller than conventional quarter-bricks Higher current capability at elevated temperatures than most competitors quarter-bricks Onboard input differential LC-filter High efficiency no heat sink required Start-up into pre-biased output No minimum load required Available in Through-hole and Surface mount packages Fixed-frequency operation Fully protected Remote output sense Output voltage trim range: +10%/20% with Industry-standard trim equations MTBF of 3.4 million hours, calculated per Telcordia TR-332, Method I Case 1 RoHS lead-free solder and lead-solder-exempted products are available Positive or negative logic ON/OFF option Approved to the latest edition and amendment of ITE Safety standards UL/CSA 60950-1 2 SQ24T03150 / SQ24S03150 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, All output voltages, unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Absolute Maximum Ratings Input Voltage Continuous 0 40 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C Input Characteristics Operating Input Voltage Range 19 24 36 VDC Turn-on Threshold 16 17 17.5 VDC Input Under Voltage Lockout (Non-latching) Turn-off Threshold 15 16 16.5 VDC Maximum Input Current 3.3 ADC, 15 VDC Out 19 VDC In 3.2 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 105 mADC Input Reflected-Ripple Current 25MHz bandwidth 7 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Isolation Characteristics I/O Isolation 2000 VDC Isolation Capacitance 230 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 415 kHz 1 Output Voltage Trim Range Industry-std. equations -20 +10 % 1 Remote Sense Compensation Percent of V (nom) +10 % OUT Output Over-Voltage Protection Non-latching 117 125 140 % 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 Output Characteristics Output Voltage Set Point (no load) 14.850 15.000 15.150 VDC Over Line 4 10 mV Output Regulation Over Load 4 10 mV 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function for Vin > 21 V however total output voltage trim from all sources should not exceed 10% of VOUT(NOM), in order to insure specified operation of overvoltage protection circuitry. Vout can be increased up to 5% for Vin > 20V. tech.support psbel.com