Fairchild Semiconductor KA3082B Datasheet
KA3082
Bi-Directional DC Motor Driver
www.fairchildsemi.com
Features
• Built-in Brake Function for Stable Brake Characteristics.
• Built-in Element to Absorb a Surge Current Derived From
Changing Motor Direction and Braking Motor Drive.
• Motor Speed Control by an External Voltage.
• Stable Motor Direction Change.
• Interfaces With CMOS Devices.
• Built-in the Thermal Shut Down Circuit (165°C).
• Low Standby Current. (6.5mA)
Description
The KA3082 is a monolithic integrated circuit designed for
driving bi-directional DC motor with braking and speed
control, and it is suitable for the loading motor driver of
VCR, CDP, and TOY systems. The speed control can be
achieved by adjusting the external voltage of the speed
control pin. It has two pins of logic inputs for control ling the
forward/ reverse and braking.
10-SIP
Target Appli cations
• Video Cassette Recorder (VCR) Loading Motor
• Low Current DC Motor Such as Audio or Video
Equipment.
• General DC Motor
©2002 Fairchild Semiconductor Corporation
Ordering Information
Device Package Operating Temp.
KA3082B 10-SIP -25°C ~ +75°C
Rev. 1.0.2
KA3082
Pin Assignments
KA3082
GND V
12345678910
O1
V
V
Z1
CTLVIN1
V
IN2
SV
CC
PV
CCVZ2
Pin Definitions
Pin Number Pin Name I/O Pin Function Description
1 GND - Ground
2V
3V
4V
5V
6V
7SV
8PV
9V
10 V
O1
Z1
CTL
IN1
IN2
CC
CC
Z2
O2
O Output 1
- Phase Compensation
I Motor Speed Control
I Input 1
I Input 2
- Supply Voltage (Signal)
- Supply Voltage (Power)
- Phase Compensation
O Output 2
V
O2
Internal Block Diagram
BIAS
1234
GND
2
V
O1
DRIVER OUT
PRE DRIVER
LOGIC SWITCH
5
V
Z1
V
CTL
V
IN1
678910
V
IN2
SV
CC
TSD
PV
CC
Z2
V
O2
V
Equivalent Circuits
Description Pin No. Internal Circuit
KA3082
Vcc
Vcc
Output 2, 10
Phase
Compensation
3, 9
2
10
V
CC
50Ω
3
9
Speed Control 4
Vcc
VCC
4
Vcc
3
KA3082
(Continued)
Equivalent Circuit
Description Pin No. Internal Circuit
Input 5, 6
SV
CC
PV
CC
Vcc
VCC
5
6
V
CC
7
8
7
8
Vcc
4
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