Datasheet

11

002-37178 Rev. *B

2023-10-10

EZ-PD™ PAG2S-PS integrated USB PD and

synchronous-rectification controller

Functional description

3

Functional description

3.1

Modes of operation - SR

EZ-PD™ PAG2S-PS supports synchronous rectification in both DCM and CCM modes. The SR sense block supports

negative sense detect and ZCD. Figure 4, Figure 5, and Figure 6 show SR_GDRV functionality in QR/CrCM, valley

switching, and CCM modes. SR controller has a turn-on propagation delay of typical 40 ns and a turn-off

propagation delay of typical 25 ns.

Figure 4

SR_SEN and SR_GDRV in QR/CrCM mode

Time

Primary Current

Secondary Current

SR_SEN

Primary FET ON,

SR FET OFF

Primary FET ON,

SR FET OFF

Primary FET OFF,

SR FET ON

Primary FET OFF,

SR FET ON

Negative sense

detect

ZCD

Both FET OFF

SR_GDRV