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PDF TA7288P Data sheet ( Hoja de datos )
| Número de pieza | TA7288P | |
| Descripción | DUAL BRIDGE DRIVER | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA7288P
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 Vref 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
z Wide range of operating voltage: VCC (opr.) = 4.5 to 18 V
VS (opr.) = 0 to 18 V
Vref (opr.) = 0 to 18 V
No malfunction occurs even if VCC is higher than VS or vice versa. however, observe Vref ≤ VS.
z Output current up to 1.0 A (AVE.) and 2.0 A (PEAK)
z Built-in thermal shutdown circuit and overcurrent protection circuit for output pins
z Built-in punch−through current restriction circuit
z Built-in back electromotive force absorber diode
z 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
1 2007-06-27
1 page  
Absolute Maximum Ratings (Ta = 25°C)
TA7288P
Characteristics
Supply voltage
Motor drive voltage
Reference voltage
Output current
Power dissipation
Operating temperature
Storage temperature
PEAK
AVE.
Note 1: Duty 1/10, 100 ms
Note 2: Tc = 25°C
Symbol
VCC
VS
Vref
IO (PEAK)
IO (AVE.)
PD
Topr
Tstg
Rating
25
25
25
2.0 (Note 1)
1.0
12.5 (Note 2)
−30 to 75
−5 to 150
Unit
V
V
V
A
A
W
°C
°C
Electrical Characteristics
(unless otherwise noted, Ta = 25°C, VCC = 12 V, VS = 18 V)
Characteristics
Supply current
Input voltage
1 (High)
2 (Low)
Input current
Input hysteresis voltage
Upper
Saturation voltage
Lower
Upper
Lower
Output voltage
Leakage current
Diode forward voltage
Reference current
Upper
Lower
Upper
Lower
Symbol
ICC1
ICC2
VIN (H)
VIN (L)
IIN
∆VT
VSATU−1
VSATL−1
VSATU−2
VSATL−2
VSATU−1’
VSATU−2’
IL U
IL L
VF U
VF L
Iref
Test
Circuit
Test Condition
1 Output OFF CW/CCW mode
1 Output OFF Brake mode
2 Tj = 25°C pin (4), (5), (6)
2 Tj = 25°C pin (4), (5), (6)
2 VIN = 3.5 V, sink mode
2―
3
Vref = VS, VS−Vout,
IO = 0.2 A
3
Vref = VS, Vout−GND,
IO = 0.2 A
3
Vref = VS, VS−Vout,
IO = 1.0 A
3
Vref = VS, Vout−GND
IO = 1.0 A
3
Vref = 10 V, Vout−GND
IO = 0.5 A
3
Vref = 10 V, Vout−GND
IO = 1.0 A
― VS = 25 V
― VS = 25 V
4 IF = 1 A
4 IF = 1 A
2 Vref = 10 V, source mode
Min Typ. Max Unit
― 17 30
mA
― 13 25
3.5 ― 5.5
V
GND ―
0.8
― 5 20 μA
― 0.7 ―
V
― 0.9 1.2
V
― 1.0 1.3
V
― 1.3 1.6
V
― 1.8 2.5
V
10.7 11.0 11.8
V
10.4
―
―
―
―
―
10.7
―
―
2.2
1.4
5
11.5
50
50
―
―
30
V
μA
V
μA
5 2007-06-27
5 Page 
TA7288P
Points to remember on handling of ICs
(1) Over current Protection Circuit
Over current protection circuits (referred to as current limiter circuits) do not necessarily protect
ICs under all circumstances. If the Over current protection circuits operate against the over current,
clear the over current status immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings
can cause the over current protection circuit to not operate properly or IC breakdown before
operation. In addition, depending on the method of use and usage conditions, if over current
continues to flow for a long time after operation, the IC may generate heat resulting in breakdown.
(2) Thermal Shutdown Circuit
Thermal shutdown circuits do not necessarily protect ICs under all circumstances. If the thermal
shutdown circuits operate against the over temperature, clear the heat generation status
immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings
can cause the thermal shutdown circuit to not operate properly or IC breakdown before operation.
(3) Heat Radiation Design
In using an IC with large current flow such as power amp, regulator or driver, please design the
device so that heat is appropriately radiated, not to exceed the specified junction temperature (TJ)
at any time and condition. These ICs generate heat even during normal use. An inadequate IC heat
radiation design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown.
In addition, please design the device taking into considerate the effect of IC heat radiation with
peripheral components.
(4) Back-EMF
When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the motor’s
power supply due to the effect of back-EMF. If the current sink capability of the power supply is small, the
device’s motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid
this problem, take the effect of back-EMF into consideration in system design.
11 2007-06-27
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TA7288P.PDF ] | |
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