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BA6219B

Rohm
Part Number BA6219B
Manufacturer Rohm
Description Reversible motor driver
Published Apr 1, 2005
Detailed Description Motor driver ICs Reversible motor driver BA6219B / BA6219BFP-Y The BA6219B and BA6219BFP-Y are reversible-motor drivers...
Datasheet PDF File BA6219B PDF File

BA6219B
BA6219B

Overview
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 output power supply, VO is nearly equal to VR.
BA6219B / BA6219BFP-Y (1) When the output voltage control pin (pin 4) is used VR < VCC1 * (VSAT (Q1) ) VBE (Q5) ) VBE (Q6) ) VBE (Q7)) VCC1 * 2.
5V VR < VCC2 * {(VSAT (Q3) * VBE (Q3) * VBE (Q2)) ) (VBE (Q5) ) VBE (Q6) ) VBE (Q7))} VCC2 * 1V (2) Thermal shutdown circuit The thermal shutdown circuit turns off the driver output if the chip temperature rises to about 180_.
The shutdown signal is not latched.
(3) Power supply impedance When the motor stop...


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