TA8428K(S)/F
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8428K(S),TA8428F
FULL BRIDGE DRIVER
The TA8428K (S), TA8428F is Full Bridge Driver IC for Brush
Motor Rotation Control.
Forward Rotation, Reverse Rotation, Stop and Braking operations
are available.
Thermal Shutdown and Short Current Protector are provided.
FEATURES
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Output Current : TA8428K (S)
TA8428F
1.5 A (AVE.), 3.0 A (PEAK)
0.8 A (AVE.), 2.4 A (PEAK)
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4 modes (forward / reverse / short brake and stop) are
available with 2 TTL compatible inputs control.
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Free wheeling diodes are equipped.
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Multi protection system driver
(Thermal shutdown and short current protector)
Weight
HSIP7−P−2.54
: 1.88 g (Typ.)
HSOP20−P−450−1.00 : 0.79 g (Typ.)
1
2001-06-13
TA8428K(S)/F
BLOCK DIAGRAM
TA8428K(S)
TA8428F
PIN FUNCTION
PIN No.
K(S)
1
2
3
4
5
6
7
F
8
9
15
Fin
16
Other pin
1, 3
SYMBOL
IN 1
IN 2
OUTA
GND
OUT
A
N.C
V
CC
FUNCTIONAL DESCRIPTION
TTL compatible control inputs.
(PNP type low active comparator inputs)
Output terminals and free wheeling diodes are connected
between each output to GND and V
CC
.
GND terminal
Output terminals and free wheeling diodes are connected
between each output to GND and V
CC
.
Non connection
Supply voltage terminal for control and motor drive.
TA8428K (S), TA8428F has 2 build−in protective functions which work independently.
These circuit operations are as follows.
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Thermal shutdown (TSD)
If junction temperature of TA8428K (S), TA8428F is over the specified temperature (150°C Typ.) by excess
power dissipation or abnormal ambient temperature change, thermal Shutdown circuit turn “ON” and output 4
transistors become High impedance. (All transistors turn “OFF”)
2
2001-06-13
TA8428K(S)/F
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Short current protector (ISD)
Short current protector circuit senses all output transistor current. If output transistor current is over the
specified limiting current value (2.0~3.0 A Typ.), short current protector operates and all output transistors
periodically turn “OFF” (High Impedance Mode) in a period of approximately 80 µs.
This state is continued until the release of over current mode.
3
2001-06-13
TA8428K(S)/F
INTERNAL CIRCUIT
TA8428K(S)
TA8428F
4
2001-06-13
TA8428K(S)/F
MAXIMUM RATINGS
(Ta = 25°C)
CHARACTERISTIC
Supply Voltage
Input Voltage
K (S) type
Output
Current
F type
PEAK
AVE.
PEAK
AVE.
K (S) type
Power Dissipation
F type
Operating Temperature
Storage Temperature
P
D
T
opr
T
stg
SYMBOL
V
CC
V
IN
I
O (PEAK)
I
O (AVE.)
I
O (PEAK)
I
O (AVE.)
P
D
RATING
30
−0.3~V
CC
3.0 (Note 1)
1.5
2.4 (Note 1)
0.8
1.25 (Note 2)
10.0 (Note 3)
1.9 (Note 4)
2.5 (Note 5)
−30~85
−55~150
°C
°C
W
A
UNIT
V
V
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
t = 100 ms
No heat sink
Tc = 85°C
This value is obtained by 30 × 30 × 1.6 mm PCB mounting occupied copper area in excess of 60%
This value is obtained by 50 × 50 × 1.6 mm PCB mounting occupied copper area in excess of 60%
ELECTRICAL CHARACTERISTICS
(V
CC
= 24 V, Ta = 25°C)
CHARACTERISTIC
SYMBOL
I
CC1
Quiescent Current
I
CC2
I
CC3
Input Voltage
V
IL
V
IH
I
IL
I
IH
K (S) type
F type
V
sat
(total)
I
LU
I
LL
K (S) type
Diode Forward Voltage
F type
Thermal Shutdown Circuit
Operating Temperature
Propagation Delay Time
I
LU
I
LL
I
LU
I
LL
T
SD
t
pLH
t
pHL
―
2
2
4
I
F
= 0.8 A
―
―
―
2
V
IN
= GND
V
IN
= V
CC
I
O
= 1.5 A, Tc = 25°C
I
O
= 0.8 A, Tc = 25°C
V
L
= 25 V
1
TEST
CIR−
CUIT
Test Condition
Stop mode
Forward / reverse mode
Brake mode
―
―
MIN
―
―
―
―
2.0
―
―
―
―
―
―
―
―
―
―
―
―
―
TYP.
8
35
16
―
―
―
―
2.2
1.8
―
―
2.6
1.5
2.2
1.2
150
1
1
MAX
15
85
30
0.8
―
50
10
2.9
2.5
50
50
―
―
―
―
―
―
―
°C
µs
V
V
mA
UNIT
Input Current
Output Saturation
Voltage
Output Leakage Current
2
µA
3
V
4
µA
I
F
= 1.5 A
5
2001-06-13
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