Telecommunication Isolated Bus Converter

Efficient Next-Generation DC-DC Bus Converter

The BusQor® bus converter is a next-generation, board-mounted, isolated, fixed-frequency DC-DC converter that uses synchronous rectification to achieve extremely high conversion efficiency. The converter consumes very little power, so no heat sink is required, thereby saving costs, weight, height, and application workload. The BusQor converter is highly suitable for generating the intermediate bus voltage required to drive the load point (non-isolated) converter in the intermediate bus architecture. 

Operating features

Up to 97% ultra-high efficiency 

Provide 6.0 V, 9.6 V, 12 V, 13.6 V or 48 V buses for the Intermediate Bus Architecture (IBA) 

Working temperature: -40°C to +100°C 

Output voltage ripple: 0.3% (typical value) of peak-to-peak value 

Input reference: Ripple current < Iin (typical value) - root mean square value of 5% 

Current uniformity accuracy ±10% 

The isolation voltage can reach up to 4250 Vdc. 

Industry-standard pin configuration and standard packaging 

Wide input voltage range: 

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 Function

Input Under-Voltage Lockout (UVLO) 

Output current limit (OCP) and short circuit protection 

Output overvoltage protection (OVP) 

Thermal shutdown (OTP) 

Reverse drive protection (beginning to enter pre-bias load) 

Input side's on/off control 

Telemetry 

The adjustment of output voltage for certain models