KA3011BD Fairchild Semiconductor, KA3011BD Datasheet - Page 7

• 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

KA3011BD
Electrical Characteristics (Continued)
Calculation of Gain & Torque Limit Current
0.255 from GM times R1 is a fixed value within IC.
Vmax (see above block diagram) is setted to 350mV.
ECR
EC
+
Gm
Absolute
Values
Current / Voltage
Convertor
Itl mA
Vin
+
VM
R1
Gain
Max. output current limiting
=
Vmax
--------------- -
VM
R
=
S
+
Vmax
7
0.255
-------------- -
R
=
S
+
+
350 mV
----------------------- -
Negative
Feedback loop
Driver
R
S
I
O
H1
VM
Commutation
Distributor
Power
Transistors
R
CS1 (Pin 28)
S
H2
V
S
+
H3
Output
Current sense
U
W
V
I
O