KA3011BD Fairchild Semiconductor, KA3011BD Datasheet - Page 8

• Manufacturer Part Number: KA3011BD
• Description: Motor / Motion / Ignition Controllers & Drivers
• Manufacturer: Fairchild Semiconductor
• Type: 3 Phase Brushless Spindle Motor Driverr

Specifications of KA3011BD

• Operating Supply Voltage: 5 V
• Mounting Style: SMD/SMT
• Package / Case: SSOPH-28
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application Information
1. TORQUE & OUTPUT CURRENT CONTROL
• By amplifying the voltage difference between E
• The output current (I
• As a result, the signals, E
• The range of the torque voltage is as shown below.
The input range of E
2. SHORT BRAKE
V
3 mV
for the current sense amp.
By the negative feedback loop, the sensed output voltage, V
Therefore, the output current (I
Driver.
RNF
Pin # 18
[V]
OFF
ON
V
CC
E
CR
Reverse
18
Torque AMP
CR,
+
E
50k
Short brake
C
O
50mV
E
) is converted into the voltage (V
30k
C
C
Ecoff
is 0.2V ~ 4V.
and E
O
0
) is linearly controlled by the input V
CR
Ecoff+
can control the velocity of the Motor by controlling the output current (I
ECR-EC
50mV
Forward
0.51[A/V]
C
and Ecr from servo IC, the torque sense amp produces the input (V
V
M
ON
OFF
CS
+
) through the sense resistor (R
8
CS
Current Sense AMP
E
CR
is equal to the input V
-E
2
C
AMP
TSD
.
E
E
CR
CR
4
> E
< E
Controller
Gain
C
C
AMP
7
CS
.
Forward rotation
Stop after detecting
reverse rotation
) and compared with the V
V
CS
Driver
+
V
M
Rotation
I
O
R
CS
M
O
MOTOR
) of the
KA3011BD
AMP
AMP
)
.