CSD95372AQ5M Datasheet, PDF (12/24 Pages) Texas Instruments – Synchronous Buck NexFET™ Power Stage

CSD95372AQ5M
SLPS416 – JUNE 2013
PWM
Vin
VSW
FCCM (OFF#)
LO GATE
IL
Zero-Cross<1>
Zero-Cross<2>
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Vout
Diode Emulation
Enabled
Zero-cross detection is enabled by FCCM low. Diode-Emulation Mode is entered on the third
consecutive PWM pulse in which a zero-crossing event is detected. If at any time no zero-cross
event is detected when FCCM is low, the zero-cross counter is reset and diode-emulation mode is
not enabled. If FCCM remains low, diode-emulation mode will be re-enabled on the third
consecutive PWM pulse in which a zero-cross event is detected.
Figure 18. FCCM Falling Timing Diagram
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