Reversible motor driver
Motor driver ICs
Reversible motor driver
BA6219B / BA6219BFP-Y
The BA6219B and BA6219BFP-Y are reversible-motor drivers...
Description
Motor driver ICs
Reversible motor driver
BA6219B / BA6219BFP-Y
The BA6219B and BA6219BFP-Y are reversible-motor drivers suitable for brush motors. Two logic inputs allow four output modes: forward, reverse, idling, and braking. The motor revolving speed can be set arbitrarily by controlling the voltage applied to the motor. FApplications VCRs and cassette tape recorders FFeatures 1) Large output current. (IO=2.2A Max.) 2) Built-in thermal shutdown circuit. FBlock diagram
3) Built-in output voltage setting pins. 4) Small standby supply current.
398
Motor driver ICs
FAbsolute maximum ratings (Ta = 25_C)
BA6219B / BA6219BFP-Y
FRecommended operating conditions (Ta = 25_C)
FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 12V)
FElectrical characteristic curves
399
Motor driver ICs
BA6219B / BA6219BFP-Y
FMeasurement circuits
FInput / output truth table
400
Motor driver ICs
FPin descriptions (BA6219BFP-Y)
BA6219B / BA6219BFP-Y
(BA6219B)
401
Motor driver ICs
FOperation notes (1) A schematic for the internal circuit associated with the output voltage setting pin (Pin 4) is shown in Fig. 7. The maximum output voltage (VOMAX.) is given by : VOMAX.=VCC1 * VSAT (Q1) * VBE (Q2) * VBE (Q3) * VBE (Q4) For the condition of VR being equal to or less than VOMAX., the relationship between the output voltage (VO) and the pin 4 voltage is given by : VO=VR ) {(VBE (Q5) ) VBE (Q6) ) VBE (Q7)) * (VBE (Q2) ) VBE (Q3) ) VBE (Q4))} Though ∆VBE depends on the out...
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