BQ55090QPx40

DC-DC Converter

35-55 V

9.6 V

43 A

400 W

2000 V dc

Quarter-brick

Input

Output

Current

Power

Isolation

DC-DC Converter

Product Details

The BusQor® BQ55090QPA40 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 heat sink is not required, which saves cost, weight, height, and application effort. The BusQor series provides an isolated step down voltage from 48 V to 12 or 9.6 V 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 (non-isolated) converters in intermediate bus architectures.

Operational Features

• High efficiency, 96.5% at full rated load current
• Delivers full power with minimal derating - no heatsink required
• Operating input voltage range: 35-55 V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement

Mechanical Features

• Industry standard quarter-brick pin-out configuration
• Size: 1.45” x 2.3” (36.8 x 58.4 mm)
• Total height: 0.467” (11.86 mm)
• Total weight: 1.5 oz (42 g)

Control Features

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

Safety Features

• UL 60950-1/R2011-12

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