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BA6825FS Arkusz danych(PDF) 4 Page - Rohm

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

BA6825FS Arkusz danych(HTML) 4 Page - Rohm

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583
Motor driver ICs
BA6825FS / BA6826FS
(3)
Output waveforms are shown in Fig. 5. Because of
the amplifier offset, the output is left OPEN when the out-
put signal switches from positive to negative. The output
waveform is determined by the external circuit because
the IC impedance increases during this transition period.
Since inductive loads are usually provided, a capacitor
should be connected to suppress the backlash voltage.
FOperation notes
(1)
ECI input
The ECI input circuit has 2VF and a 500
Ω resistor con-
nected in series. Current is limited only by the 500
Ω re-
sistor.
(2)
Hall input
Signals of 50mV (peak to peak) or greater should be ap-
plied to the Hall device input. The DC input range is be-
tween 2V and (Vreg
*1.5V). There will be no problem if
the input is centered around Vreg / 2.
Because the Hall input impedance is 1M
Ω or grater, any
type of Hall device can be connected. No current flows
when the transistor is off because the Hall input pins (
)
and
*) are differential.
Because the ICs are linear drivers, any DC offset in the
Hall device will be amplified and appear in the output.
Use Hall devices having a minimum offset. Hall devices
can be connected in either series or parallel.
(3)
Thermal shutdown circuit
The circuit puts the driver outputs (9, 11, 12, and 14 pin)
to the open state at the temperature of 175
_C (typical).
There is a temperature difference of about 20
_C between
the temperatures at which the circuit is activated and
deactivated.


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