FAIRCHILD KA8301L

www.fairchildsemi.com
KA8301
Bi-Directional DC Motor Driver
Features
Description
• Built-in brake function.
• Built-in element to absorb a surge current derived from
changing motor direction and braking motor drive.
• External motor speed control pin
• Motor direction change circuit.
• Interfaces with CMOS devices.
The KA8301 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
systems. The speed control can be achieved by adjusting the
external voltage of the speed control pin.
10-SIPH-B
Typical Application
Ordering Information
• Video cassette recorder (VCR) loading motor
• Low current DC motor such audio or video equipment
• General DC motor
Device
Package
Operating Temp.
KA8301-L
10-SIPH-B
−25°C ~ +75°C
Rev. 1.0.1
February. 2000.
©2000 Fairchild Semiconductor International
1
KA8301
Pin Assignments
KA8301
GND
1
VOUT1
2
VZ1
VR
FIN
RIN
VCC1
VCC2
VZ2
VOUT2
3
4
5
6
7
8
9
10
Pin Definitions
Pin Number
Pin Name
I/O
Pin Function Description
1
GND
-
Ground
2
VOUT1
O
Output 1
3
VZ1
-
Phase compensation
4
VR
I
Motor speed control
5
FIN
I
Input 1
6
RIN
I
Input 2
7
VCC1
-
Supply voltage (Signal)
8
VCC2
I
Supply voltage (Power)
9
VZ2
I
Phase compensation
10
VOUT2
O
Output 2
2
KA8301
Internal Block Diagram
DRIVER
LOGIC
PRE-DRIVER
1
GND
2
VOUT1
3
4
5
6
7
VZ1
VR
FIN
RIN
VCC1
3
8
VCC2
9
VZ2
10
VOUT2
KA8301
Equivalent Circuits
Description
Pin No.
Output
2, 10
Internal circuit
Vcc
Vcc
2
10
Phase
compensation
3, 9
3
9
Speed control
4
Vcc
VCC
4
4
Vcc
KA8301
Equivalent Circuit (Continued)
Description
Pin No.
Input
5, 6
Internal circuit
Vcc
VCC
5
6
VCC1
VCC2
7
8
GND
1
5
Vcc
KA8301
Absolute Maximum Ratings (Ta=25°°C)
Parameter
Symbol
Value
Unit
Supply voltage
VCCmax
18
V
Maximum output current
1.6
IOmax
note1
A
Power dissipation
Pd
15note2
W
Input voltage
VIN
−0.3 ~ VCC
V
Operating temperature
TOPR
−25 ~ +75
°C
Storage temperature
TSTG
−55 ~ +150
°C
Notes:
1. Duty 1/100, pulse width 500µs
2. 1) When mounted on glass epoxy PCB (76.2 × 114 × 1.57mm)
2) Power dissipation reduces 120mW / °C for using above Ta=25°C
3) Do not exceed Pd and SOA(Safe Operating Area).
Power Dissipation Curve
Pd (W)
20
15
SOA
0
0
25
50
75
100
125
150
175
Ambient temperature, Ta [°C]
Recommened Operating Conditions (Ta=25°°C)
Parameter
Operating supply voltage
Symbol
Value
Unit
VCC
8 ~ 18
V
6
KA8301
Electrical Characteristics (Ta=25°°C, Vcc=12V)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Pin5 & 6: GND, RL=∞
3
5.5
20
mA
Min. input-on current 1
IIN1
RL=∞, pin5=IIN1, pin6=L
-
10
50
µA
Min. input-on current 2
IIN2
RL=∞, pin5=L, pin6=IIN2
-
10
50
µA
Quiescent current
IQ
Input threshold voltage 1
VINTH1
RL=∞, pin5=VINTH1, pin6=L
0.7
1.3
2.0
V
Input threshold voltage 2
VINTH2
RL=∞, pin5=L, pin6=VINTH2
0.7
1.3
2.0
V
Output leakage current 1
IOL1
RL=∞, pin5 & 6=GND
-
-
1
mA
Output leakage current 2
IOL2
RL=∞, pin5 & 6=GND
-
-
1
mA
Zener current 1
IZ1
RL=∞, pin5=H, pin6=L
-
0.85
1.5
mA
Zener current 2
IZ2
RL=∞, pin5=L, pin6=H
-
0.85
1.5
mA
Output voltage 1
VO1
RL=60Ω, pin5=H, pin6=L
6.6
7.2
-
V
VO2
RL=60Ω, pin5=L, pin6=H
6.6
7.1
-
V
Saturation voltage (Pin10-1)
VCE10-1
RL=RC=∞, pin5=H, pin6=L,
ISINK=100mA
-
0.83
1.5
V
Saturation voltage (Pin2-1)
VCE2-1
RL=RC=∞, pin5=L, pin6=H,
ISINK=100mA
-
0.83
1.5
V
Saturation voltage (Pin8-2)
VCE8-2
RL=RC=∞, pin5=H, pin6=L,
ISOURCE=100mA
-
0.83
1.5
V
Saturation voltage (Pin8-10)
VCE8-10
RL=RC=∞, pin5=L, pin6=H,
ISOURCE=100mA
-
0.83
1.5
V
Output voltage 2
7
KA8301
Application Information
1. FORWARD AND REVERSE CONTROL LOGIC
Pin #5
Pin #6
Pin #2
Pin #10
Function
L (0.7V ↓)
L (0.7V ↓)
L
L
Brake
L (0.7V ↓)
H (2.0V ↑)
L
H
Reverse
H (2.0V ↑)
L (0.7V ↓)
H
L
Forward
H (2.0V ↑)
H (2.0V ↑)
H
H
Brake
• If pin #5=H, pin #6=L, load current flows from pin #2 to pin #10 through a motor.
• If pin #5=L, pin #6=H, load current flows from pin #10 to pin #2 through a motor.
• If pin #5=pin #6=L or pin #5=pin #6=H, the KA8301 stops supplying the power to motor while absorbing counter EMF
from the motor as a brake.
2. RUSH CURRENT RESTRICTING CIRCUIT
If a high voltage generated during reversing operation is applied across pin #2 and pin #10, an internal comparator activates
the rush current restricting circuit.
3. DRIVE CIRCUIT
In the forward mode, the drive circuit supplies a load current to the motor from pin #2 to pin #10.
In the reverse mode, it supplies the current from pin #10 to pin #2.
The output voltage (VOUT) applied to the motor is given by the followings;
VOUT = VZD − VCE(sat), where VZD: a zener voltage applied to pin #4
If pin #4 is left open, the output voltage is given by the followings;
VOUT = VCC1 − VCE(sat, pnp) − 2VF − VCE(sat)
8
KA8301
Typical Performance Characteristics
9
KA8301
Typical Performance Characteristics (Continued)
10
KA8301
Typical Performance Characteristics (Continued)
11
KA8301
Test Circuits
KA8301
GND VOUT1
1
2
VZ1
VR
FIN
3
4
5
RIN
VCC1
VCC2
VZ2
VOUT2
6
7
8
9
10
CD
0.1µF
A
S4
S3
S7
S1
S2
RC
10Ω
A
S5
A
A
S6
VCC
ZD
7.4V
VIN
Typical Application Circuits
KA8301
GND VOUT1
1
2
VZ1
VR
FIN
3
4
5
RIN
VCC1
VCC2
VZ2
6
7
8
9
VOUT2
10
10
VCC
0.1µ
M
12