SPRSP63B October 2022 – November 2023 TMS320F2800132 , TMS320F2800133 , TMS320F2800135 , TMS320F2800137
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
Merchant telecom rectifier consists of a power factor correction (PFC) stage and a DC-DC converter stage. The Totem pole PFC is widely used as the PFC stage. For the DC-DC stage, LLC and phase-shifted full bridge (PSFB) are the two most popular topologies. Single-chip and two-chip architecture can be used in merchant telecom rectifier, as shown in Figure 8-9 and Figure 8-10.
The PFC stage draws sine-wave current from the AC mains in phase with the AC voltage, and maintains a steady DC bus voltage (VDC, typically +400 V) across its output. This output voltage is applied to the input of DC-DC stage, which converts it to an isolated low-output voltage Vout (usually 48 V).