FAN8725 Fairchild Semiconductor, FAN8725 Datasheet - Page 14

Motor / Motion / Ignition Controllers & Drivers BTL Motor Drive IC 3Phase BLDCM+5CH

FAN8725

Manufacturer Part Number
FAN8725
Description
Motor / Motion / Ignition Controllers & Drivers BTL Motor Drive IC 3Phase BLDCM+5CH
Manufacturer
Fairchild Semiconductor
Type
Spindle Motorr
Datasheet

Specifications of FAN8725

Operating Temperature Classification
Commercial
Package Type
QFPH
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
13.2V
Operating Supply Voltage
15 V
Supply Current
0.6 A
Mounting Style
SMD/SMT
Package / Case
QFPH-48
Operating Temperature
- 35 C to + 85 C
Lead Free Status / RoHS Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN8725
Manufacturer:
SEIKO
Quantity:
490
FAN8725 (KA3025)
On the other hand, if the spindle rotates in forward rotation, the phase relationship is H3->H2->H1 as shown in Fig.(b)
The direction output ,detector is Low, when the spindle rotates forward, and HIGH in the reverse direction.
6. REVERSE ROTATION PREVENTION
1) When the output of the OR Gate, A is LOW, it steers all the output current of the current sense Amp to the Gain Controller
2) As in the state of the forward rotation, the D-F/F output, Q is HIGH and the motor rotates normally. At this state, if the
zero. The output current of the Driver becomes zero and the motor stops.
control input is changed such that EC>ECR, then the motor rotates slowly by the reverse commutation in the Driver. When
the motor rotates in reverse direction, the D-F/F output becomes Low and the OR Gate output, becomes LOW. This pre-
vents the motor from rotating in reverse direction. The operation principle is shown in the table and the flow chart.
ECR
H2+
H3+
H2-
H3-
EC
+
+
+
-
-
-
H1
H2
H3
D
CK
D-F/F
Q
A
Low Active
14
Controller
Current
Sense
Amp
Gain
(b) Forward rotation
Driver
M

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