BQ55090ETx27 DC-DC Converter

35-55 V

9.6 V

27 A

250 W

2000 V dc







DC-DC Converter

Product Details

The BusQor® BQ55090ETA27 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 power dissipated by the converter is so ow that a heatsink is not required, which saves cost, weight, height, and application effort. The BusQor eries provides an isolated step down voltage from 48 to 9.6 V intermediate bus with no regulation in a standard eighth-brick module. BusQor converters are ideal for creating the mid-bus voltage required to drive point-of-load (non-isolated) converters in intermediate bus architectures. RoHS compliant (see last page).

Operational Features

• Ultra-high efficiency, > 95% at full rated load current
• Delivers up to 27 amps of output current with minimal derating - no heatsink required
• Input voltage range: 35 V - 55 V provides 6.5 V - 11 V bus for distributed power architectures
• Fixed frequency switching provides predictable EMI performance

Mechanical Features

• Industry standard eighth-brick bus converter pin-out
• Size: 0.90" x 2.3" (22.9 x 58.4 mm) x 0.484" (12.29 mm)
• Total weight: 0.7 oz. (20 grams)

Control Features

• On/Off control referenced to input side (positive and negative logic options are available)

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)
• Thermal shutdown