FAN8727 Fairchild Semiconductor, FAN8727 Datasheet - Page 16

• Manufacturer Part Number: FAN8727
• Description: Motor / Motion / Ignition Controllers & Drivers BTL Motor Drive IC 3Phase BLDCM+4CH
• Manufacturer: Fairchild Semiconductor
• Type: 4 Channel Motor Driverr

Specifications of FAN8727

• Operating Supply Voltage: 15 V
• Supply Current: 1.3 A
• Mounting Style: SMD/SMT
• Package / Case: QFPH-48
• Operating Temperature: - 35 C to + 85 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FAN8727
6. Thermal Shutdown (Tsd) Function
When the junction temperature rises up to about 175 C, then the output drive circuit is shut down, when the junction tempera-
ture falls off to about 160 C, the output drive circuit will be normally operated. It has the temperature hysteresis of about 15 C.
7. Rotational Direction Detecting Function
Inversely, if the hall sensors turn on in the order, H3
sors will be as shown mext page.
16
- The forward and reverse rotations of the MD are detected by the circuit, as shown in the above Table.
- The rotational direction of the MD can be learned by the output waveforms of the hall sensor and/or the driver. Let the
H2+
H2
H3+
H3
three hall sensors be H1, H2 and H3 respectively. If the hall sensors turn on in the order, H1
rotation, the output waveforms of the hall sensors will be as shown below.
+
+
H1
H2
H3
D
CK
D-F/F
R
Q
V
CC
H2
11
DIR
H1, of the forward rotation, the output waveforms of the hall sen-
E
E
C
C
< E
> E
CR
CR
Rotation
Forward
Reverse
( a)
H2
H3, of the reverse
High
Low
DIR