The ASQ24 eighth-brick dc-dc converters are ideally suited for aerospace applications where high reliability, low profile, and low weight are critical. They are designed for reliable operation in harsh thermal and mechanical environments. In high-ambient temperature applications, the ASQ24 Series converters provide thermal performance that exceeds competing dc-dc converters that have a higher nominal rating and much larger package size. This performance is accomplished through the use of patented/patent-pending circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Coupled with the use of 100% automation for assembly, this results in a product with extremely high quality and reliability. Available in through-hole and surface-mount packages, the ASQ24 Series converters are also ideal for environments with little or no airflow. Operating from an 18 to 36 VDC input, the ASQ24 Series converters provide any standard output voltage from 12 VDC down to 1.0 VDC. Outputs can be trimmed from 20% to +10% of the nominal output voltage (10% for output voltages 1.2 VDC and 1.0 VDC), thus providing outstanding design flexibility. RoHS lead-solder-exemption compliant Delivers up to 15A (50 W) Operates from 55C to 85C ambient Survives 1000 g mechanical shock, MIL-STD-883E Industry-standard quarter-brick pinout Available in through-hole and surface-mount packages Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0, 1.8, 1.5, 1.2, and 1.0 V Low profile: 0.274 (6.96 mm) Low weight: 0.53 oz 15 g typical Extremely small footprint: 0.896 x 2.30 (2.06 in2) On-board input differential LC-filter Extremely low output and input ripple Start-up into pre-biased load No minimum load required 2000 VDC I/O isolation Fixed-frequency operation Fully protected Remote output sense Positive or negative logic ON/OFF option Output voltage trim range: +10%/-20% (except 1.2 and 1.0V outputs with a trim range of 10%) with industry-standard trim equations High reliability: MTBF 3.4 million hours, calculated per Telcordia TR-332, Method I Case 1 Meets conducted emissions requirements per FCC Class B and EN55022 Class B when used with an external filter All materials meet UL94, V-0 flammability rating Approved to the latest edition of the following standards: UL/CSA60950-1, IEC60950-1 and EN60950-1. Telecommunications, Wireless, Servers, Workstations LAST TIME BUY2 ASQ24 Series Conditions: T = 25C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, All output voltages, unless otherwise specified. A PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS Absolute Maximum Ratings Input Voltage Continuous 0 40 VDC Operating Ambient Temperature -55 85 C Storage Temperature -55 125 C Input Characteristics Operating Input Voltage Range 18 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 Isolation Characteristics I/O Isolation 2000 VDC 1.0 - 3.3V 160 pF Isolation Capacitance: 5.0 - 6.0V 260 pF 8.0V, 12V 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 Industry-std. equations (1.0 - 1.2V) -10 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Non-latching (1.5 - 12V) 117 125 140 % Output Over-Voltage Protection Non-latching (1.0 - 1.2V) 124 132 140 % 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 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources should not exceed 10% of V (NOM), in order to insure specified operation of over-voltage protection circuitry. See Output OUT Voltage Adjust/Trim for detailed information. tech.support psbel.com LAST TIME BUY