TA7279P/AP
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA7279P,TA7279AP
Dual-Bridge Drivers (for Switching between Forward and Reverse Rotation) for DC Motors
The TA7279P and TA7279AP can control a DC motor in four
modes (forward rotation, reverse rotation, stop, and brake), using
their bridge driver best suited for switching between forward and
reverse rotation.
These ICs can deliver an output current of 1.0 A (AVE.) and 3.0 A
(PEAK). They can adjust the motor voltage easily because they
have a circuit configuration best suited for VCR front loading,
tape loading, and reel rotation as well as power supply pins
separately for two sections (output and control). In addition, they
can be connected directly to CMOS devices because their input
current is low.
Weight: 3.00 g (typ.)
Features
Wide range of operating voltage
: V
CC
(opr.) = 6 to 18 V (P, AP),
V
S
(opr.) = 0 to 16 V (P) / = 0 to 18 V (AP)
No malfunction occurs even if V
CC
is higher than V
S
or vice versa. However, observe V
ref
≤
V
S
.
Output current up to 1.0 A (AVE.), 3.0 A (PEAK)
Built−in thermal shut down circuit
Built-in back electromotive force absorber diode
Built-in hysteresis circuit
The TA7279P/AP:
The TA7279P/AP is Sn plated product including Pb.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-37Pb solder bath
*solder bath temperature = 230°C
*dipping time = 5 seconds
*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 = 5 seconds
*the number of times = once
*use of R-type flux
1
2006-3-2
TA7279P/AP
Application Note
(1)
Input circuit
The input circuit is an active high type, as shown in the diagram. When voltage higher than the specified
V
IN (H)
is applied, the output is logic “H”. When voltage lower than the specified
V
IN (L)
is applied or if the input is grounded, the output is logic “L”. Since the input current IN flows to the
input when logic “H”, be careful with the output impedance at the previous step.
(2)
Output circuit
4
2006-3-2