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BA6486FS データシート(PDF) 8 Page - Rohm

部品番号 BA6486FS
部品情報  FDD spindle motor driver
Download  11 Pages
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メーカー  ROHM [Rohm]
ホームページ  http://www.rohm.com
Logo ROHM - Rohm

BA6486FS データシート(HTML) 8 Page - Rohm

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551
Motor driver ICs
BA6486FS
FOperation notes
(1)
Thermal shutdown circuit
This circuit shuts down all the IC currents when the chip
junction temperature is increased to about 175
_C (typi-
cal). The thermal shutdown circuit is deactivated when
the temperature drops to about 155
_C (typical).
(2)
Hall elements connection
Hall elements can be connected in either series or paral-
lel. When connecting in series, care must be taken not to
allow the Hall output to exceed the Hall common-mode
input range.
(3)
Hall input level
Switching noise may occur if the Hall input voltage (pins
17
X22) is too high. Differential inputs of about 100m Vp-p
are recommended.
(4)
Driver ground pin (14 pin)
Pin 14, which is the motor current ground pin, is not con-
nected to the signal ground pin (26 pin). Design a proper
conductor pattern in consideration of the motor current
that flows through pin 14.
(5)
External clock
Make sure that the pin 7 voltage is always less than VCC
and more than the ground voltage.
FInput/output circuits
(1) Index input (1, 2 pin)
(2) FG amplifier (3
X5 pin)
(3) Speed control (6 pin)
(4) External clock input (7 pin)


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