Telecom Isolated Bus Converters

High Efficiency Next Generation DC-DC Bus Converters

The BusQor^® bus converters are the next-generation, board-mountable, isolated, fixed switching frequency DC‑DC converters that use 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. BusQor converters are ideal for creating the mid-bus voltage required to drive point‑of‑load (non-isolated) converters in Intermediate Bus Architecture.

Operational Features

• Ultra-high efficiency up to 97%
• Delivers 6.0 V, 9.6 V, 12 V, 13.6 V or 48 V bus for Intermediate Bus Architectures (IBA)
• Operating Temperature -40ºC to +100ºC
• Output Voltage Ripple <0.3% of Vout (typ.) pk-pk
• Input Ref. Ripple Current <5% of Iin (typ.) rms
• Current Share Accuracy ±10%
• Isolation Voltage Up to 4250 Vdc
• Industry standard pin-out configurations and standard footprints
• Wide input voltage ranges:
  • 42 - 53 V (BQ50)
  • 35 - 55 V (BQ55)
  • 40 - 65 V (BQ57)
  • 35 - 75 V (BQ60, PQ60)
  • 36 - 75 V (SQ60)
  • 330 - 365 V (BQ352)
  • 230 - 400 V (BQ4H)

Protection/Control Features

• Input under-voltage lockout (UVLO)
• Output current limit (OCP) and short circuit protection
• Output over-voltage protection (OVP)
• Thermal shutdown (OTP)
• Back-drive protection (starts into pre-biased load)
• On/Off control referenced to input side
• Remote sense
• Output voltage trim on select models