TA8428K(S)/F
2001-06-13
1
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
l Output Current : TA8428K (S) 1.5 A (AVE.), 3.0 A (PEAK)
TA8428F
0.8 A (AVE.), 2.4 A (PEAK)
l 4 modes (forward / reverse / short brake and stop) are
available with 2 TTL compatible inputs control.
l Free wheeling diodes are equipped.
l 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.)
TA8428K(S)/F
2001-06-13
2
BLOCK DIAGRAM
PIN FUNCTION
PIN No.
K(S) F
SYMBOL FUNCTIONAL
DESCRIPTION
1
8
IN 1
TTL compatible control inputs.
2 9 IN
2
(PNP type low active comparator inputs)
3 15
OUTA
Output terminals and free wheeling diodes are connected
between each output to GND and V
CC
.
4 Fin GND
GND
terminal
5 16
OUT
A
Output terminals and free wheeling diodes are connected
between each output to GND and V
CC
.
6
Other pin
N.C
Non connection
7 1,
3 V
CC
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.
l Thermal shutdown (TSD)
If junction temperature of TA8428K (S), TA8428F is over the specified temperature (150C 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")
TA8428K(S)
TA8428F
TA8428K(S)/F
2001-06-13
3
l 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 s.
This state is continued until the release of over current mode.
TA8428K(S)/F
2001-06-13
4
INTERNAL CIRCUIT
TA8428K(S)
TA8428F
TA8428K(S)/F
2001-06-13
5
MAXIMUM RATINGS
(Ta = 25C)
CHARACTERISTIC SYMBOL RATING
UNIT
Supply Voltage
V
CC
30
V
Input Voltage
V
IN
-0.3~V
CC
V
PEAK I
O
(PEAK)
3.0 (Note 1)
K (S) type
AVE. I
O
(AVE.)
1.5
PEAK I
O
(PEAK)
2.4 (Note 1)
Output
Current
F type
AVE. I
O
(AVE.)
0.8
A
1.25 (Note 2)
K (S) type
P
D
10.0 (Note 3)
1.9 (Note 4)
Power Dissipation
F type
P
D
2.5 (Note 5)
W
Operating Temperature
T
opr
-30~85 C
Storage Temperature
T
stg
-55~150 C
Note 1: t = 100 ms
Note 2: No heat sink
Note 3: Tc = 85C
Note 4: This value is obtained by 30 30 1.6 mm PCB mounting occupied copper area in excess of 60%
Note 5: 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 = 25C)
CHARACTERISTIC SYMBOL
TEST
CIR-
CUIT
Test Condition
MIN
TYP.
MAX
UNIT
I
CC1
Stop
mode
8 15
I
CC2
Forward / reverse mode
35 85
Quiescent Current
I
CC3
1
Brake mode
16 30
mA
V
IL
0.8
Input Voltage
V
IH
2
2.0
V
I
IL
V
IN
= GND
50
Input Current
I
IH
2
V
IN
= V
CC
10
A
K (S) type
I
O
= 1.5 A, Tc = 25
C
2.2 2.9
Output Saturation
Voltage
F type
V
sat
(total)
3
I
O
= 0.8 A, Tc = 25
C
1.8 2.5
V
I
LU
50
Output Leakage Current
I
LL
4 V
L
= 25 V
50
A
I
LU
2.6
K (S) type
I
LL
I
F
= 1.5 A
1.5
I
LU
2.2
Diode Forward Voltage
F type
I
LL
4
I
F
= 0.8 A
1.2
V
Thermal Shutdown Circuit
Operating Temperature
T
SD
150 C
t
pLH
2
1
Propagation Delay Time
t
pHL
2
1
s
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