TA7288P
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA7288P
Sequential Dual-Bridge Driver (Driver for Switching between Forward and Reverse
Rotation) for DC Motor
The TA7288P is a bridge driver that is ideal for normal / reverse
switching.
This circuit offers four modes: normal rotation, reverse rotation,
stop, and brake.
The output current is 1.0 A (AVE.) and 2.0 A (PEAK). TA7288P
has an ideal circuit configuration for VCR front tape loading and
offers two types of power supply pins. One is for output, the other
for control. The V
ref
pin on the output side used to control the
motor voltage facilitates motor voltage adjustment. The IC
requires little input current, enabling direct connection with
CMOS.
Weight: 2.47 g (typ.)
Features
Wide range of operating voltage: V
CC
(opr.) = 4.5 to 18 V
V
S
(opr.) = 0 to 18 V
V
ref
(opr.) = 0 to 18 V
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.) and 2.0 A (PEAK)
Built-in thermal shutdown circuit and overcurrent protection circuit for output pins
Built-in punch−through current restriction circuit
Built-in back electromotive force absorber diode
Built-in hysteresis circuit
The TA7288P:
The TA7288P 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
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TA7288P
Pin Function
Pin No.
1
2
3
4
5
6
7
8
9
10
Symbol
GND
OUT2
OUT3
IN1
IN2
IN3
V
CC
V
ref
V
S
OUT1
Functional Description
GND terminal
Output terminal
Output terminal
Input terminal
Input terminal
Input terminal
Supply voltage terminal for Logic
Supply voltage terminal for control
Supply voltage terminal for Motor drive
Output terminal
Input Circuit
The input circuit uses active-high logic as shown below.
The specified voltage V
IN (H)
and higher represent a logical high level. V
IN (L)
and lower including a connection
to a ground represent a logical low level.
When the input is on a logical high level, the input current I
IN
flows into the input. So, be careful about the
output impedance of the preceding stage.
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2007-06-27
TA7288P
Output Circuit
Output “H” Voltage
Operation by V
ref
voltage
Voltage, which is applied to Vref, of which high output, 2V
BE
is applied to base A of the Q
2
(power
transistor) and low voltage, Q
2
V
BE
is output as V
OUT (H)
by the V
ref
circuit.
V
OUT
= V
ref
+2V
BE
−Q
2
V
BE
≒V
ref
+0.7 (V)
V
ref
V
ref
terminal required to connect to V
S
terminal for stable operation in case of no requirement of
V
OUT
control.
Function
Input
IN1
0
1
1
0
0
1
IN2
0
0
0
1
1
1
IN3
1/0
0
1
0
1
1/0
OUT1
∞
H
L
H
L
L
Output
OUT2
∞
L
H
∞
∞
L
OUT3
∞
∞
∞
L
H
L
M1
STOP
CW/CCW
CCW/CW
STOP
STOP
BRAKE
Mode
M2
STOP
STOP
STOP
CW/CCW
CCW/CW
BRAKE
∞:
Note:
High impedance
Inputs are all high active type.
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2007-06-27
微控制器 MCU
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