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KA3082
Bi-Directional DC Motor Driver
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 (165C). * 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 controlling the forward/ reverse and braking.
10-SIP
Target Applications
* Video Cassette Recorder (VCR) Loading Motor * Low Current DC Motor Such as Audio or Video Equipment. * General DC Motor
Ordering Information
Device KA3082B Package 10-SIP Operating Temp. -25C ~ +75C
Rev. 1.0.2
(c)2002 Fairchild Semiconductor Corporation
KA3082
Pin Assignments
KA3082
GND 1
VO1 2
VZ1 3
VCTL 4
VIN1 5
VIN2 6
SVCC 7
PVCC 8
VZ2 9
VO2 10
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 9 10 Pin Name GND VO1 VZ1 VCTL VIN1 VIN2 SVCC PVCC VZ2 VO2 I/O O I I I O Ground Output 1 Phase Compensation Motor Speed Control Input 1 Input 2 Supply Voltage (Signal) Supply Voltage (Power) Phase Compensation Output 2 Pin Function Description
Internal Block Diagram
DRIVER OUT
PRE DRIVER
BIAS
LOGIC SWITCH
TSD
1
2
3
4
5
6
7
8
9
10
GND
VO1
VZ1
VCTL
VIN1
VIN2
SVCC
PVCC
VZ2
VO2
2
KA3082
Equivalent Circuits
Description Pin No. Internal Circuit
Vcc
Vcc
Output
2, 10
2 10
VCC
Phase Compensation
3
50
3, 9
9
Vcc
Vcc
VCC
Speed Control
4
4
3
KA3082
Equivalent Circuit (Continued)
Description Pin No. Internal Circuit
Vcc
Vcc
VCC
Input
5, 6
5 6
7
VCC
SVCC PVCC
7 8
8
4
KA3082
Absolute Maximum Ratings (Ta=25C)
Parameter Supply Voltage Maxium Output Current Power Dissipation Operating Temperature Storage Temperature Symbol VCCmax IOmax Pd TOPR TSTG Value 18 1.6
note1
Unit V A W C C
Remark -
1.2note2 -25 ~ +75 -55 ~ +125
Note: 1. Duty 1 / 100, pulse width 500s 2. 1) When mounted on glass epoxy PCB (76.2 x 114 x 1.57mm) 2) Power dissipation reduces 9.6mV / C for using above Ta=25C. 3) Do not exceed Pd and SOA(Safe Operating Area).
Power Dissipation Curve
Pd (mW)
1, 200 SOA
0
0
25
50
75
100
150 15 125 Ambient temperature, Ta [C]
Recommened Operating Conditions (Ta=25C)
Parameter Operating Supply Voltage Symbol SVCC,PVCC Operating voltage range 7 ~ 18 Unit V
Note: Caution 1) PVCC SVCC Caution 2) When PVCC is above 16V, the VCTL must be opened or 8.5 VCTL PVCC
5
KA3082
Electrical Characteristics (Ta=25C, VCC=SVCC=PVCC=12V)
Parameter Quiescent Current Min. Input-on Current 1 Min. Input-on Current 2 Input Threshold Voltage 1 Input Threshold Voltage 2 Output Leakage Current 1 Output Leakage Current 2 Zener Current 1 Zener Current 2 Output Voltage 1 Output Voltage 2 Saturation Voltage 1 (Upper) Saturation Voltage 2 (Upper) Saturation Voltage 1 (Lower) Saturation Voltage 2 (Lower) Symbol ICC2 IIN1 IIN2 VITH1 VITH2 IOL1 IOL2 IZ1 IZ2 VO1 VO2 V SAT1 VSAT2 VSAT3 VSAT4 Conditions Pin5 & 6: GND, RL= RL=, pin5=IIN1, pin6=L RL=, pin5=L, pin6=IIN RL=, pin5=VIN, pin6=L RL=, pin5=L, pin6=VIN RL=, pin5 & 6=GND RL=, pin5 & 6=GND RL=, pin5=H, pin6=L RL=, pin5=L, pin6=H RL=60, pin5=H, pin6=L RL=60, pin5=L, pin6=H IO=300mA IO=500mA IO=300mA IO=500mA Min. 4 1.0 1.0 6.6 6.6 Typ. 6.5 10 10 1.3 1.3 0.01 0.01 0.85 0.85 7.2 7.2 1.9 1.9 0.25 0.4 Max. 9.5 30 30 1.6 1.6 1 1 1.5 1.5 7.6 7.6 2.3 2.3 0.5 0.65 Unit mA A A V V mA mA mA mA V V V V V V
6
KA3082
Application Information
1. Thermal Shut Down Circuit
I
Q1 V1 R1 Q2 V2 R2 Q3
When Ta = 25C, Q2 & Q3 are Turn-off and output stage operate normally. V1 = I x (R1 + R2) V2 = R2 / (R1 + R2) x V1 = 0.37V When Ta = 165C, Q2 & Q3 become Turn-on and it turn-off the output stage. 0.70V - 0.37V = 330mV (When Q2 & Q3 are Turn-on, VbeQ2 = VbeQ3 = 0.70V) And temperature coefficient of Q2 = Q3 = -2mV/C T.S.D: 330mV / 2mV = 165C
2. Logic Input & Output Table
Input Pin #5 Low High Low High Input High is above 2.0V. Input Low is below 0.7V. Pin #6 Low Low High High Pin #2 Low High Low Low Output Pin #10 Low Low High Low Motor Brake Forward Reverse Brake
7
KA3082
3. Logic Switch Circuit
SVCC V2 6 Q7 Q6 Q5 VCTL 7.4V 4
V1
5
Q4
This circuit define reference voltage of output. When pin #5 is "H" and pin #6 is "L", - V1 = VZD + VBEQ4 + VBEQ5 *=* 8.9V - V2 = VBEQ 7 + VSATQ6 *=* 0.87V V1 and V2 are related with the output voltage of the motor and change according to the voltage of pin #4 (VCTL).
4. Drive Output Circuit
PVCC V1 Q1 Q4 V2
Q2 R1 VO1 RL
M
Q5 R2 VO2
Q3
Q6
V1 = 8.9V V2 = 0.87V VO1 = V1 - VBEQ1 - VBEQ2 VO2 = VQ6SAT VO = VO1 - VO2 = V1 - VBEQ1 - VBEQ2 - VQ6SAT IRL = (VO1 - VO2) / RL
8
KA3082
Typical Performance Characteristics
CHARACTERISTIC GRAPHS 1. VCC vs ICC
10 9 8 7 6 5 4 3 2 1 0 0 2 4 6 8 10 12 VCC(V)
2. Temperature vs ICC
10 9 8 7 6 5 4 3 2 1 0 -35
ICC(mA)
ICC(mA)
VIN = 0V 14 16 18 20
VCC = 12V VIN = 0V
-15
5
25 45 Temp.( C)
65
85
3. VCTL vs. Vo
12 10 8 VO(V) 6 4 2 0 0 2 4 6 VCTL(V) 8 10 12 VCC = 12V VIN = 5V/0V RL = 60
4. Temperature vs. Vo
7.7 7.6 7.5 7.4 7.3 7.2 7.1 7.0 6.9 6.8 6.7 6.6 6.5 -35
VO(V)
VCC = 12V VCTL = 7.4V VIN = 5V/0V RL = 60 -15 5 25 45 Temp.( C) 65 85
5. IO vs. VSAT(UPPER) VSAT SAT(UPPER)
3.0 2.5 VSAT(V)
VSAT SAT(LOWER) 5. IO vs. VSAT(LOWER)
1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.2 0.4 0.6 IO(A)
1.5 1.0 0.5 0.0 0.2 0.4 0.6 IO(A) 0.8 1.0 1.2 VCC = 12V VCTL = ope VIN = 5V/0V
VSAT(V)
2.0
VCC = 12V VCTL = open VIN = 5V/0V 0.8 1.0 1.2
9
KA3082
Test Circuits
KA3082
GND 1 VO1 2 VZ1 3 VCTL 4 VIN1 VIN2 5 CD 0.1F S3 S1 S2 A S5 ZD 7.4V A A VCC VIN S4 6 SVCC PVCC 7 8 VZ2 9 VO2 10
A
Typical Application Circuits
KA3082
GND 1 VO1 2 VZ1 3 VCTL 4 VIN1 5 VIN2 6 SVCC PVCC VZ2 7 8 10 VCC 0.1 9 VO2 10
M
10
KA3082
11
KA3082
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 9/6/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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