FAN8729 Fairchild Semiconductor, FAN8729 Datasheet - Page 13

• Manufacturer Part Number: FAN8729
• Description: Motor / Motion / Ignition Controllers & Drivers BLDC+4CH BTL
• Manufacturer: Fairchild Semiconductor
• Type: Spindle Motor Controllerr

Specifications of FAN8729

• Operating Temperature Classification: Commercial
• Package Type: PQFP
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 13.2V
• Operating Supply Voltage: 4.5 V to 13.2 V
• Supply Current: 16.5 mA
• Mounting Style: SMD/SMT
• Package / Case: QFPH-48
• Lead Free Status / RoHS Status: Compliant

FAN8729
5. Spindle
• The spindle driver circuit consists of 3 section: Torque sense amp, Current sense amp, and Power driver.
• Torque sense amp compares and amplifies E
• Current sense amp limits the current in Motor(Io) by comparing output current signal from torque sense amp with the
• Power driver output the current to the motor based on the current generated form current sense amp.
• Feature Table
13
voltage comparison, it determines the signal as forward or reverse.
current of R
V
CS
RNF[V]
E
3mV
CR
.
+
E
-
C
Torque sense amp
Reverse
Ecoff-
-50
0
Ecoff+
VM1
+50
V
C
AMP
Forward
Current sense amp
and E
+
-
CR
E
CR
signals from SERVO, and sends them to current sense amp. With
-
E
C
[mV]
TSD
E
E
C
C
< E
> E
Controller
Gain
CR
CR
Stop after detecting
Forward rotation
reverse rotation
Power Driver
Driver
VM1
Rotation
V
Rcs
RCS
Io
M