DatasheetsPDF.com

BA6840BFP-Y

Rohm
Part Number BA6840BFP-Y
Manufacturer Rohm
Description 3-phase motor driver
Published Apr 1, 2005
Detailed Description Motor driver ICs 3-phase motor driver BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS The BA6840BFS, BA6840BFP-Y, BA684...
Datasheet PDF File BA6840BFP-Y PDF File

BA6840BFP-Y
BA6840BFP-Y

Overview
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.
FBlock diagram 4) Internal thermal shutdown circuit.
5) Internal hall bias circuit.
523 Motor driver ICs BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions 524 Motor driver ICs BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V, VM = 12V) 525 Motor driver ICs FElectrical characteristic curves BA6840BFS / BA6840BFP-Y / BA6840BFP / BA6842BFS 526 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 transistors 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 resistor (0.
5Ω recommended) between this pin and the ground to monitor the output current.
(5) Phase compensation pin (CNF pin) Connect ...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)