Datasheet

12

002-37216 Rev. *B

2023-10-10

EZ-PD™ PAG2S-QZ integrated USB PD and secondary-side QR-ZVS

controller

Functional description

3.3

Modes of operation - PWM and ZVS

PAG2S-QZ supports multiple modes of operation: QR or CrCM, valley switching, DCM, CCM, and burst mode for

light load operations. Firmware allows configurability for minimum/maximum pulse width, minimum/maximum

period and pulse skip or burst levels. Figure 6 through Figure 8 show the PWM_DRV functionality in QR/CrCM,

valley switching, and CCM modes.

Figure 6

PWM_DRV in QR/CrCM mode

Ramp

Error Amplifier Output

Time

Primary current

Primary FET drain

voltage

Secondary current

PWM_DRV

Primary FET ON,

SR FET OFF

Primary FET OFF,

SR FET ON

Both FET OFF

Ramp re-start

SR_SEN