UCD3138064A Datasheet, PDF (64/83 Pages) Texas Instruments – UCD3138064A Highly Integrated Digital Controller for Isolated Power

UCD3138064A
SLUSCA5A – DECEMBER 2015 – REVISED AUGUST 2016
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7.2.2.2 DPWM Initialization for PSFB
The UCD3138x DPWM peripheral provides flexibility for a wide range of topologies. The PSFB
configuration utilizes the Intra-Mux and Edge Generation Modules of the DPWM. For a diagram showing
these modules, see the UCD3138x Digital Power Peripherals Manual.
A schematic of the power stage of the PSFB is shown in Figure 7-2:
T1
L1
VOUT
VBUS
Q6
I_pri
PRIM
CURRENT
T2
Q5
QT1
D1 QT2
R2
Lr
T1
QB1
D2 ^QB2
ISOLATED
GATE Transformer
SYNCHRONOUS
GATE DRIVE
Figure 7-2. Schematic – PSFB Power Stage
64
Applications, Implementation, and Layout
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