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參數(shù)資料
| 型號(hào)： | TA7289FG |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 0.8 A, PDSO22 |
| 封裝： | 0.450 INCH, 1 MM PITCH, LEAD FREE, PLASTIC, HSOP-20/22 |
| 文件頁(yè)數(shù)： | 15/19頁(yè) |
| 文件大?。?/td> | 593K |
| 代理商： | TA7289FG |
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TA7289P/F/FG
2006-3-2
5
Sawtooth OSC circuit consists of Q1 through Q4 and R1 through R3.
R1 and R2 are voltage divider of 5 V buildin regulator.
Q1 is turned “off” when V4 is less than the voltage of 2.5 V + VBE Q4 + VBE Q3 approximately equal to 3.8 V. V4
is increased by C1 charging of I4. Q1 and Q2 are turned “ON” when V4 becomes V4 H level.
Lower level of V4 (V4 L) is equal to VBE Q4 + VBE Q3 + VSAT Q1 approximately equal to 1.5 V.
V4 is calculated by following equation.
V4 = 5(1 e
3
1R
C
1
t) .................................................(1)
Assuming that V4 = 1.5 V (t = t1) and=3.8 V (t = t2).
C1 is external capacitance connected to Pin (4) (or (5)) and R3 is onchip 20 k resistor.
Therefore, OSC frequency is calculated as follows.
t1 = C1R31n (1
5
1.5
) ................................................(2)
t2 = C1R31n (1
5
3.8
)................................................(3)
fOSC =
2
1 t
t
1
))
5
3.8
(1
1n
R
)
5
1.5
(1
1n
R
(
C
1
3
1
=
F)
is
C
of
(Unit
(kHz)
C
21.4
1
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC
SYMBOL
RATING
UNIT
VCC
30
Supply Voltage
Vref
30
VIN
7
Reference Voltage
VI
2
V
TA7289P
1.5
TA7289F/FG
IO (MAX.)
0.8
TA7289P
0.7
Output Current
TA7289F/FG
IO (AVE.)
0.3
A
TA7289P
2.3
Power Dissipation
TA7289F/FG
PD (Note)
1.0
W
Operating Temperature
Topr
30~85
°C
Storage Temperature
Tstg
55~150
°C
Note:
NO HEAT SINK
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| TA7289P | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:PWM STEPPING MOTOR DRIVER |
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| TA7291AF | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Full-Bridge Driver for DC Motors (driver for controlling the forward and reverse rotations) |
| TA7291AP | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Full-Bridge Driver for DC Motors (driver for controlling the forward and reverse rotations) |
| TA7291AS | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Full-Bridge Driver for DC Motors (driver for controlling the forward and reverse rotations) |
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