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PDF BA6849 Data sheet ( Hoja de datos )

Número de pieza BA6849
Descripción 3-phase motor driver for CD-ROMs
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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No Preview Available ! BA6849 Hoja de datos, Descripción, Manual

Motor driver ICs
3-phase motor driver for
CD-ROMs
BA6849FP / BA6849FP-Y / BA6849FM /
BA6849FS
The BA6849 series are ICs developed for CD-ROM spindle motor drives. These ICs possess a short brake and reverse-
rotation brake for two types of brake functions, and also contain FG output and rotation direction detection (FR) circuits,
making them high-functionality and high-performance ICs.
FApplications
CD-ROM, CD-R, CD-RW, DVD-ROM, and DVD-RAM
FFeatures
1) Three-phase, full-wave, pseudo-linear drive system.
2) Built-in power save and thermal shutdown functions.
3) Built-in current limiter and Hall bias circuits.
4) Built-in FG output.
5) Built-in rotation direction detector.
6) Built-in reverse rotation prevention circuit.
7) Built-in short brake pin.
FAbsolute maximum ratings (Ta = 25_C)
863

1 page




BA6849 pdf
Motor driver ICs
FInput / output circuits
(1) Power save
BA6849FP / BA6849FP-Y / BA6849FM / BA6849FS
(2) Torque command input
(3) Torque output (A1, A2, and A3)
(4) Hall input (H1), H1, H2), H2, H3), H3)
867

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BA6849 arduino
Motor driver ICs
BA6849FP / BA6849FP-Y / BA6849FM / BA6849FS
FOperation notes
(1) Power save
The power save input is an I / O circuit like the own
shown in Fig.1.
The thermal derating characteristics of the power save
pin is –8mV / _C, and the resistance will fluctuate be-
tween ±30% so be careful of the input voltage range.
(2) Hall input
The input circuit shown in Fig.4 is used for the Hall inputs.
The Hall elements can be connected either in series or
in parallel.
(3) Thermal shutdown (TSD)
When the junction temperature reaches 175_C, the A1,
A2, and A3 coil outputs go open circuit. The thermal shut-
down has approximately 15_C of hysteresis.
FElectrical characteristics curves
873

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