Data Sheet

TB67S249FTG
2017-08-18
18
Constant current PWM blank/mask time
The TB67S249FTG has multi filter time to reject incoming noise or spike (inrush) current, which is generated during motor
operation, to avoid miss detection.
Timing charts may be simplified for explanatory purpose.
(1) Digital NFblank (Filtering time to avoid spike current, which is generated before Charge): 1.25 μs (typ.)
(2) Analog NFblank (Filtering time to avoid pulse noise for NFth): 0.35 μs (typ.)
(3) Digital ADMDblank (Filtering time to avoid spike current, which is generated between Charge and Decay for
ADMDth: 2.2 μs (typ.)
(4) Analog ADMDblank (Filtering time to avoid pule noise for ADMDth): 0.35 μs (typ.)
Note: Above periods are design values. They are not guaranteed.
Charge
Fast
Slow
NFth
ADMDth
(1)
(2)
(3)
(4)