BQ55120QZx67 DC-DC Converter

35-55 V




2000 V dc







DC-DC Converter

Product Details

The BusQor® BQ55120QZx67 bus converter is a nextgeneration, board-mountable, isolated, fixed switching frequency DC-DC converter that uses synchronous rectification to achieve extremely high conversion efficiency. The BusQor series provides an isolated step down voltage from 48V to 12 or 9.6V intermediate bus with no regulation in a standard “quarter-brick” module. BusQor converters are ideal for creating the mid-bus voltage required to drive point-of-load (nonisolated) converters in intermediate bus architectures.

Operational Features

• High efficiency, 97% at full rated load current
• Delivers 67A full power with appropiate derating
• Operating input voltage range: 35-55V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement

Mechanical Features

• Industry standard quarter-brick pin-out configuration
• Size: 1.51"x 2.34" (38.4 x 59.4mm), height: 0.517" (13.13mm)
• Total Baseplate weight: 2.67 oz (75.7 g)

Control Features

• On/Off control referenced to input side (negative logic only)
• Inherent current share (by droop method) for high current and parallel applications.

Safety Features

• UL 60950-1/R2011-12
• EN60950-1/A2:2013
• CAN/CSA-C22.2 No. 60950-1/A1:2011

Protection Features

• Input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages
• Output current limit and short circuit protection (auto recovery)
• Output over-voltage protection
• Thermal shutdown