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BA6825FS Arkusz danych(PDF) 3 Page - Rohm

Numer części BA6825FS
Szczegółowy opis  2-phase motor driver for VCR cylinder motors
Download  6 Pages
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Producent  ROHM [Rohm]
Strona internetowa  http://www.rohm.com
Logo ROHM - Rohm

BA6825FS Arkusz danych(HTML) 3 Page - Rohm

  BA6825FS Datasheet HTML 1Page - Rohm BA6825FS Datasheet HTML 2Page - Rohm BA6825FS Datasheet HTML 3Page - Rohm BA6825FS Datasheet HTML 4Page - Rohm BA6825FS Datasheet HTML 5Page - Rohm BA6825FS Datasheet HTML 6Page - Rohm  
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582
Motor driver ICs
BA6825FS / BA6826FS
FInput / output circuits
(1)
Hall and ECI inputs
(2)
Coil output
FCircuit operation
(1)
The signal from the Hall device is amplified by the
Hall amplifier and then supplied to the driver circuit. The
driver gain, which is constant, is regulated by changing
the Hall amplifier gain with the input current on the output
current control pin (ECI pin). The motor rotational speed
is sensed by the FG, and the output of which is F / I-con-
verted and supplied to the ECI pin as a feedback signal,
so that a constant rotational speed is maintained as fol-
lows :
(1) The motor speed decreases.
(2) The speed control IC outputs a feedback signal to the
ECI pin.
(3) The Hall amplifier gain increases.
(4) The output current increases.
(5) The motor speed increases.
(2)
When the voltage on Hall IN
φ1 ()) is higher than the
voltage on Hall IN
φ1 (*), an output current flows from
OUT1 (
*) to OUT1 ()) according to the voltage differen-
tial. When the voltage on Hall IN
φ1 (*) is higher, on the
other hand, an output current flows from OUT1 (
)) to
OUT1 (
*).
Similarly, when the voltage on Hall IN
φ2 ()) is higher than
the voltage on Hall IN
φ2 (*), an output current flows from
OUT2 (
*) to OUT2 ()) according to the voltage differen-
tial. When the voltage on Hall IN
φ2 (*) is higher, on the
other hand, an output current flows from OUT2 (
)) to
OUT2 (
*).


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