The BusQor® SQ60120QPA28 bus converter is a next-generation, board-mountable, isolated, fixed switching frequency dc-dc converter that uses synchronous rectification to achieve extremely high conversion efficiency. The power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. The SQ BusQor series provides an isolated step down voltage from 48V to a semi-regulated 12V intermediate bus. BusQor converters are ideal for customers who need multiple outputs and wish to build or buy point of load converters to work with a 12V rail. RoHS Compliant (see last page).

Operational Features

• Ultra-high efficiency, 95 at full rated load current

• Delivers up to 28 A (336 W) of output current (power) with minimal derating - no heatsink required

• Input voltage range: 36 – 75 V

• Fixed frequency switching provides predictable EMI performance

Mechanical Features

• Industry standard quarter-brick bus converter pin-out (“S” Feature Set)

• Industry standard size: 1.45 x 2.3 (36.8 x 58.4 mm)

• Total height only 0.483 (12.27 mm), permits better airflow and smaller card pitch

• Total weight: 1.5 oz. (42 grams)

Control Features

• On/Off control referenced to input side Control Features

Protection Features

• Input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages

• Output current limit and short circuit protection

• Output over-voltage protection

• Thermal shutdown

Safety Features

• 2000V, 30 MW input-to-output isolation

• UL/cUL 60950-1 recognized (US & Canada), basic insulation rating

• TUV certified to EN60950-1

• Meets 72/23/EEC and 93/68/EEC directives

• Meets UL94V-0 flammability requirements