TA8428K(S)/F/FG
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT
SILICON MONOLITHIC
TA8428K(S), TA8428F/FG
FULL-BRIDGE DRIVER
The TA8428K (S) and TA8428F/FG are full-bridge driverICs for
brush motor rotation control.
Forward rotation, reverse rotation, stop and braking operations
are available.
Thermal shutdown and short current protectors are provided.
FEATURES
Output Current:
TA8428K (S)
TA8428F/FG
1.5 A (AVE.), 3.0 A (PEAK)
0.8 A (AVE.), 2.4 A (PEAK)
Four modes (forward / reverse / short brake and stop) are
available with 2 TTL compatible input control.
Free-wheeling diodes are provided.
Multi-protection system driver
(thermal shutdown and short current protector)
TA8428F/FG
Weight
HSIP7−P−2.54
: 1.88 g (Typ.)
HSOP20−P−450−1.00 : 0.79 g (Typ.)
The TA8428K(S) is Sn plated product including Pb.
The TA8428FG is a Pb-free product.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-63Pb solder bath
*solder bath temperature = 230°C
*dipping time = 5seconds
*number of times = once
*use of R-type flux
2. Use of Sn-3.0Ag-0.5Cu solder bath
*solder bath temperature = 245°C
*dipping time = 5seconds
*the number of times = once
*use of R-type flux
1
2001-06-13
TA8428K(S)/F/FG
BLOCK DIAGRAM
TA8428K(S)
TA8428F/FG
PIN FUNCTION
PIN No.
K(S)
1
2
3
4
5
F/FG
8
9
15
Fin
16
SYMBOL
IN 1
IN 2
OUTA
GND
OUT
A
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.
6
7
Other pin
1, 3
N.C
V
CC
The TA8428K (S) and TA8428F/FG have two build-in protective functions which work independently.
These circuit operations are as follows:
Thermal shutdown (TSD)
If the junction temperature of the TA8428K (S) and TA8428F/FG is over the specified temperature (150°C typ.)
due to excess power dissipation or abnormal ambient temperature change, the thermal shutdown circuit turns
“ON” and the four output transistors become high impedance. (All transistors turn “OFF”.)
2
2001-06-13
TA8428K(S)/F/FG
Short current protector (ISD)
The short current protector circuit senses all output transistor currents. If the output transistor current is over
the specified limiting current value (2.0~3.0 A typ.), the 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.
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2001-06-13
TA8428K(S)/F/FG
INTERNAL CIRCUIT
TA8428K(S)
TA8428F/FG
4
2001-06-13
TA8428K(S)/F/FG
MAXIMUM RATINGS
(Ta = 25°C)
CHARACTERISTIC
Supply Voltage
Input Voltage
K (S) type
Output
Current
F/FG type
PEAK
AVE.
PEAK
AVE.
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
K (S) type
Power Dissipation
F/FG type
Operating Temperature
Storage Temperature
P
D
T
opr
T
stg
t = 100 ms
No heat sink
Tc = 85°C
This rating is obtained when the device is mounted on a 30 × 30 × 1.6 mm PCB with a Cu area of 60% or
more.
Note 5: This rating is obtained when the device is mounted on a 30 × 30 × 1.6 mm PCB with a Cu area of 60% or
more.
Note 1:
Note 2:
Note 3:
Note 4:
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/FG type
V
sat
(total)
I
LU
I
LL
K (S) type
Diode Forward Voltage
F/FG 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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