FAN8423D3 Fairchild Semiconductor, FAN8423D3 Datasheet - Page 8

• Manufacturer Part Number: FAN8423D3
• Description: Motor / Motion / Ignition Controllers & Drivers BLDC Motor Driver 3Phase 5V Interface
• Manufacturer: Fairchild Semiconductor
• Type: 3 Phase BLDC Motor Driverr

Specifications of FAN8423D3

• Operating Supply Voltage: 15 V
• Supply Current: 1.3 A
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Operating Temperature: - 20 C to + 75 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FAN8423D3
Application Information
1. Torque Control & Output Current Control
1) By amplifying the voltage difference between Ec and Ecr from Servo IC, the Torque Sense AMP produces the input
2) The output current (I
3) As a result, the signals, E
4) The range of the torque voltage is as shown below.
8
Current
[mA]
700
500
(V
By the negative feedback loop, the sensed output voltage, VCS is equal to the input V
(I
Driver.
O
AMP
6
) is linearly controlled by the input V
The input range of E
) for the Current Sense AMP.
Reverse
Ecr
-50mV
Torque AMP
+
Ec
-
O
Ecoff-
) is converted into the voltage (V
C
CR
and E
0
and E
Ecoff+
CR
C
can control the velocity of the Motor by controlling the output current (I
50mV
ECR-EC
AMP
is 1.0 V ~ 4 V ( R
Forward
.
0.51[A/V]
V
M
+
Oct. 2000.
Rev. 1.0.1
CS
-
) through the sense resistor (R
Current Sense AMP
NF
= 0.5[ ] )
TSD
E
E
CR
CR
Controller
Gain
> Ec
< Ec
AMP
CS
Vcs
) and compared with the V
. Therefore, the output current
Driver
Forward rotation
Stop after detecting re-
verse rotation
+
V
-
M
Io
Rcs
Rotation
M
O
) of the
AMP
.