SLUS507C 鈭?JANUARY 2002 鈭?REVISED JUNE 2004
TPS40000, TPS40001
TPS40002, TPS40003
TPS40004, TPS40005
APPLICATION INFORMATION
GND
Channel Conduction
Body Diode Conduction
Fixed Delay
Adaptive Delay
Predictive Delay
UDG鈭?1144
Figure 2. Switch Node Waveforms for Synchronous Buck Converter
overcurrent
Overcurrent conditions in the TPS4000x are sensed by detecting the voltage across the main MOSFET while
it is on.
basic description
If the voltage exceeds a pre-set threshold, the current pulse is terminated, and a counter inside the device is
incremented. If this counter fills up, a fault condition is declared and the device disables switching for a period
of time and then attempts to restart the converter with a full soft-start cycle.
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