Motor driver ICs
FDD spindle motor driver
BA6492BFS
The BA6492BFS is a one-chip IC designed for driving FDD spindle mot...
Motor driver ICs
FDD spindle motor driver
BA6492BFS
The BA6492BFS is a one-chip IC designed for driving FDD spindle motors. This high-performance IC employs a 3-phase, full-wave soft switching drive system, and contains a digital servo, an index amplifier, two monostable multivibrator elements, and a power save circuit. The compactly packaged IC reduces the number of external components required. FApplications Floppy disk drivers FFeatures 1) 3-phase, full-wave soft switching drive system. 2) Digital servo circuit. 3) Power save circuit. FAbsolute maximum ratings (Ta = 25_C)
4) Hall power supply switch. 5) Motor speed changeable. 6) Index amplifier. Built-in 2 monostable multivibrator.
FRecommended operating conditions (Ta = 25_C)
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Motor driver ICs
FBlock diagram
BA6492BFS
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Motor driver ICs
FPin descriptions
BA6492BFS
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Motor driver ICs
FInput / output circuits (1) Monostable multivibrator element timing setting (3, 4 pin)
BA6492BFS
(2)
Constant
voltage output (5 pin)
(3)
Speed discriminator output (6 pin)
(4)
Integrating amplifier (7, 8 pin)
(5)
Motor output (11X15 pin)
(6)
Hall bias (16 pin)
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Motor driver ICs
Hall input (17X22 pin)
BA6492BFS
(7)
(8)
Index input (23, 24 pin)
(9)
FG amplifier (25X27 pin)
(10) Speed control (29 pin)
(11) External clock input (30 pin)
(12) Start / stop (31 pin)
(13) Timing output (32 pin)
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Motor driver ICs
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V)
BA6492BFS
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