The new high performance 20 A SQE48T20120 DC-DC converter provides a th high efficiency single output, in a 1/8 brick package that is only 62% the size of the industry-standard quarter-brick. Specifically designed for operation in systems that have limited airflow and increased ambient temperatures, the SQE48T20120 converter utilizes the same pinout and Input/Output functionality of the industry-standard quarter-bricks. In addition, a heat- spreader (baseplate) feature is available (-xDxBx suffix) that provides an effective thermal interface for coldplate and heat sinking options. The SQE48T20120 converter thermal performance is accomplished through the use advanced circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Operating from a wide-range 36-75 V input, the SQE48T20120 converter provides a fully regulated 12V output voltage. Employing a standard power pinout, the SQE48T20120 converter is an ideal drop-in replacement for existing high current quarter-brick designs. Inclusion of this converter in a new design can result in significant board space and cost savings. The designer can expect reliability improvement over other available converters because of the SQE48T20120s optimized thermal efficiency. 36-75 VDC Input 12.0 VDC 20 A Output Industry-standard quarter-brick pinout Delivers 240W at 94.2% efficiency Withstands 100V input transient for 100ms Fixed-frequency operation On-board input differential LC-filter Start-up into pre-biased load No minimum load required Meets Basic Insulation requirements Fully protected (OTP, OCP, OVP, UVLO) Positive or negative logic ON/OFF option Low height of 0.44 (11.18 mm) Weight: 32 g w/o baseplate, 40 g with baseplate High reliability: MTBF = 14.3 million hours, calculated per Telcordia SR-332, Method I Case 1 Approved to the latest edition of the following standards: UL/CSA60950-1, IEC60950-1 and EN60950-1. Designed to meet Class B conducted emissions per FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating Intermediate Bus Architectures Data communications/processing LAN/WAN Servers, Workstations 2 SQE48T20120 Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=100 F, unless otherwise specified. A PARAMETER NOTES MIN TYP MAX UNITS Absolute Maximum Ratings Continuous -0.3 80 VDC Input Voltage Transient (100ms) 100 VDC Operating Temperature Ambient (T ) -40 85 C A 1 Component (TC) -40 125 C Baseplate (T ) -40 105 C (See Derating Curves) B Storage Temperature -55 125 C Isolation Characteristics I/O Isolation 2,250 VDC Dielectric strength Isolation Capacitance 1200 pF UL/CSA60950-1, EN60950-1, and IEC60950-1. Basic Insulation Isolation Resistance 10 M Input to Baseplate 1,500 VDC Output to Baseplate 1,500 VDC Feature Characteristics Switching Frequency 428 450 502 kHz 2 Output Voltage Trim Range n/a % 2 Remote Sense Compensation n/a % Output Overvoltage Protection Non-latching 110 120 130 % 2 Over Temperature Shutdown Non-latching, Component (TC) 130 C Auto-Restart Period Applies to all protection features 250 ms Time from UVLO to Vo = 90% VOUT(NOM) Turn-On Time from Vin 22 25 ms Resistive load Time from ON to Vo = 90%V (NOM) OUT Turn-On Time from ON/OFF Control 12 15 ms Resistive load Turn-On Time from Vin Time from UVLO to Vo = 90% VOUT(NOM) 22 25 ms (w/ Co max.) Resistive load, C = 10,000 F load EXT Turn-On Time from ON/OFF Control Time from ON to Vo = 90% V (NOM) OUT 12 15 ms (w/ Co max.) Resistive load, CEXT = 10,000 F load Converter Off (logic low) -20 0.8 VDC ON/OFF Control (Positive Logic) Converter On (logic high) 2.4 20 VDC Converter Off (logic low) 2.4 20 VDC ON/OFF Control (Negative Logic) Converter On (logic high) -20 0.8 VDC Input Characteristics Operating Input Voltage Range 36 48 75 VDC Turn-on Threshold 31.5 34.5 35.5 VDC Input Undervoltage Lockout Turn-off Threshold 30 32 34.0 VDC Lockout Hysteresis Voltage 1.5 2.0 2.5 VDC Maximum Input Current Po = 240W 36 VDC In 7.3 ADC Input Standby Current Vin = 48V, converter disabled 3 5 mA Input No Load Current Vin = 48V, converter enabled 50 70 130 mA (No load on the output) 1 Reference Figure E for component (TC and TB) locations. 2 This functionality not provided, however the unit is fully regulated. tech.support psbel.com