UCD3138128APFC datasheet(65/83 Pages) TI1

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3 A – QB1

( DPWM1C )

3 B – QT1

( DPWM2 C)

2 B – QB2

( EDGEGEN )

2 A – QT 2

( EDGEGEN)

0 B –

QSYN 2,4

1 B –

QSYN 1 ,3

Transformer

Voltage

X1 , X2 , X 3 and Y1 , Y2 , Y 3

are sets of moving edges

All other edges are fixed .

DPWM 2 AF

DPWM 2 BF

DPWM3 AF

DPWM3 BF

Current

Peak Level

UCD3138128A

www.ti.com

SLUSC99 – JULY 2016

Product Folder Links: UCD3138128A

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Here is an overview of the key PSFB signals:

Figure 43. Key PSFB Signals

10.2.2.3 DPWM Synchronization

DPWM1 is synchronized to DPWM0, DPWM2 is synchronized to DPWM1, and DPWM3 is synchronized to

DPWM2, ½ period out of phase using these commands:

Dpwm1Regs.DPWMCTRL0.bit.MSYNC_SLAVE_EN = 1; //configured to slave

Dpwm2Regs.DPWMCTRL0.bit.MSYNC_SLAVE_EN = 1; //configured to slave

Dpwm3Regs.DPWMCTRL0.bit.MSYNC_SLAVE_EN = 1; //configured to slave

Dpwm0Regs.DPWMPHASETRIG.all = PWM_SLAVESYNC;

Dpwm1Regs.DPWMPHASETRIG.all = PWM_SLAVESYNC;

Dpwm2Regs.DPWMPHASETRIG.all = PWM_SLAVESYNC;

LoopMuxRegs.DPWMMUX.bit.DPWM1_SYNC_SEL = 0;

// Slave to dpwm-0

LoopMuxRegs.DPWMMUX.bit.DPWM2_SYNC_SEL = 1;

// Slave to dpwm-1

LoopMuxRegs.DPWMMUX.bit.DPWM3_SYNC_SEL = 2;

// Slave to dpwm-2

If the event registers on the DPWMs are the same, the two pairs of signals will be symmetrical. All code

examples are taken from the PSFB EVM code, unless otherwise stated.

UCD3138128APFC Datasheet(PDF) 65 Page - Texas Instruments

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