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PDF BA6840 Data sheet ( Hoja de datos )
| Número de pieza | BA6840 | |
| Descripción | 3-phase motor driver | |
| Fabricantes | ROHM Semiconductor | |
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Hay una vista previa y un enlace de descarga de BA6840 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Motor driver ICs
3-phase motor driver
BA6840BFS / BA6840BFP-Y / BA6840BFP /
BA6842BFS
The BA6840BFS, BA6840BFP-Y, BA6840BFP, and BA6842BFS are one-chip ICs designed for driving CD-ROM motors.
They are high performance-ICs with a 3-phase, full-wave, pseudo-linear drive system.
FApplications
CD-ROM / RW, DVD-ROM / PLAYER
FFeatures
1) 3-phase, full-wave, pseudo-linear drive system.
2) Start / stop pin; power saving during stop mode.
3) Internal current limit circuit.
4) Internal thermal shutdown circuit.
5) Internal hall bias circuit.
FBlock diagram
523
1 page  
Motor driver ICs
BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS
FCircuit operation
(1) Hall input X output
The 3-phase Hall signal is amplified in the hall amplifiers
and sent to the matrix section, where the signal is further
amplified and combined. After the signal is converted to
a current in the amplitude control circuit, the current is
supplied to the output driver, which then provides a motor
drive current. The phases of the Hall input signal, output
voltage, and output current are shown in Fig. 5.
(2) Torque control pin
The RNF-pin current depends on the torque control input
voltage (EC) as shown in Fig. 6.
(3) Start / stop pin
The motor is in the run mode when the pin input voltage
is 3.5V or more, and in the idle mode (all output transis-
tors are off) when the voltage is 1.5V or less.
(4) Power ground pin (RNF pin)
The RNF pin is the output stage ground pin. Connect a re-
sistor (0.5Ω recommended) between this pin and the
ground to monitor the output current.
(5) Phase compensation pin (CNF pin)
Connect and adjust a capacitor between this pin and the
ground if the output tends to oscillate.
527
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet BA6840.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BA6840 | 3-phase motor driver | ROHM Semiconductor |
| BA6840BFP | 3-phase motor driver | ROHM Semiconductor |
| BA6840BFP-Y | 3-phase motor driver | ROHM Semiconductor |
| BA6840BFS | 3-phase motor driver | ROHM Semiconductor |
| Número de pieza | Descripción | Fabricantes |
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