BD6701F_12 Datasheet, PDF (8/17 Pages) Rohm – Two-phase Full-wave DC Brushless Fan Motor Drivers

BD6701F
Datasheet
˔Description of operations
1) Lock protection and automatic restart
˓Incorporated counter system
Motor rotation is detected by hall signal, and lock detection ON time (TON) and lock detection OFF time (TOFF) are set
by IC internal counter. Timing chart is shown in Fig.13.
H+
OUT1
OUT2
FG
AL
TOFF
Output Tr OFF
TON
ON
Hi (Open collector)
Motor Lock
locking detection
Lock Recovers
release normal operation
Fig.13 Lock protection (incorporated counter system) timing chart
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TSZ22111ɾ15ɾ001
8/13
TSZ02201-0H1H0B100510-1-2
18.DEC.2012 Rev.002