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參數(shù)資料
| 型號： | TA7713P |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.025 A, PDIP20 |
| 封裝： | 0.300 INCH, 2.54 MM PITCH, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 505K |
| 代理商： | TA7713P |
TA7713P
2003-08-04
4
APPLICATION OF TA7713P
Like a video disk player, TA7713P is provided with the stopping function which, in a short time, stops the motor
having a large inertia, and makes the quick diskchange possible.
To make the frequency generator (FG) unnecessary which was formerly required for fetching the rotation signal,
the signal from the position sensing input is ORed and is output to FG output pin (pin (11)).
Therefore, for FG output, three position sensing outputs (Ha, Hb, Hc) are ORed, and the rotation speed signal of
the frequency of six times that of one output can be fetched resulting in making it possible to obtain a sufficient
controlling characteristic with the F / V (FrequencyVoltage) conversion method of monostable type.
Description is made on the application of TA7713P in the following.
(1)
Operation of FG output (pin (11)) and TFG (pin (12))
In Fig.1, Q1 and Q2 are the monostable multivibrator to which gate (Q2 base) the signal from each position
signal input of Ha, Hb and Hc is input after ORed and shaped in waveform by FF.
The pulse width of MMV made by Q1 and Q2 is determined by R2 and C2 to be connected to TFG (pin (12))
and the square wave having the pulse width to be determined by C2 and R2 is output. Of course, this
frequency is proportional to the rotation speed signal and this frequency is six times the frequency of each
position sensing. (6 per 1 electrical rotation.)
F / V conversion operation is made through connecting this FG0 output to LPF for integration. And if R2 is
made variable, the conversion gain can be changed.
Fig. 1
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