3-phase motor driver for CD-ROMs
Motor driver ICs
3-phase motor driver for CD-ROMs
BA6848FP / BA6853FS
The BA6848FP and BA6853FS are single-chip ICs dev...
Description
Motor driver ICs
3-phase motor driver for CD-ROMs
BA6848FP / BA6853FS
The BA6848FP and BA6853FS are single-chip ICs developed for CD-ROM spindle motor drives. These ICs are 3phase, full-wave, pseudo-linear drives with FG output, FG composite output, and reverse-rotation pins built-in for high functionality and high performance. FApplications CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM FFeatures 1) Three-phase, full wave, pseudo-linear drive system. 2) Built-in PS pin for power save mode when ON. 3) Built-in thermal shutdown and current limiter circuits. FAbsolute maximum ratings (Ta = 25_C)
4) Built-in Hall bias circuit (for the BA6848FP). 5) Built-in FG output and FG composite output. 6) Built-in reverse-rotation pin.
FRecommended operating conditions (Ta = 25_C)
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Motor driver ICs
FBlock diagram
BA6848FP / BA6853FS
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Motor driver ICs
FPin descriptions BA6848FP
BA6848FP / BA6853FS
BA6853FS
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Motor driver ICs
FI / O circuit diagrams (1) Power save(PS)
BA6848FP / BA6853FS
(4)
Coil output (A1, A2, A3)
(2)
Reverse (REV)
(5) Hall input (H1), H1*, H2), H2*, H3), and H3*)
(3)
Torque command input
(6)
Hall bias
Note: Resistances are typical values.
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Motor driver ICs
BA6848FP / BA6853FS
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V, VM1 = 12V, VM2 = 12V)
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Motor driver ICs
BA6848FP / BA6853FS
FCircuit operation (1) Hall input and output The phase relationship between the Hall input signals and the output current and volta...
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