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BA6219B Dataheets PDF



Part Number BA6219B
Manufacturers Rohm
Logo Rohm
Description Reversible motor driver
Datasheet BA6219B DatasheetBA6219B Datasheet (PDF)

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 vol.

  BA6219B   BA6219B


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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 stops or starts, a rush current flows in the VCC and GND lines. Depending on the way of connecting a power supply decoupling capacitor (100µF), the control input voltage may become a negative value or the supply voltage may drop to below the output voltage. This can cause erratic operations due to parasitic effects. Make sure that pin voltages will not exceed the supply voltage by more than 0.3V or will not become less than the GND pin voltage by more than 0.3V. (4) VCC1, VCC2, and VR are related to each other as shown in the output circuit diagram of Fig. 8. Their values should be kept within the following ranges. Operating supply voltage ranges (2) When the output voltage control pin (pin 4) is not used, VR is either short-circuited to VCC1 or left OPEN. (5) Input circuit 402 Motor driver ICs (6) The quality of these products have been carefully checked; however, use of the products with applied voltages, operating temperatures, or other parameters that exceed the absolute maximum rating given may result in the damage of the IC and the product it is used in. If the IC is damaged, the short mode and open modes cannot be specified, so if the IC is to be used in applications where parameters may exceed the absolute maximum ratings, then be sure to incorporate fuses, or other physical safety measures. (7) Input pins Voltage should never be applied to the input pins when the VCC voltage is not applied to the IC. Similarly, when VCC is applied, the voltage on each input pin should be less than VCC and within the guaranteed range for the electrical characteristics. (8) Back-rush voltage Depending on the ambient conditions, environment, or motor characteristics, the back-rush voltage may fluctuate. Be sure to confirm that the back-rush voltage will not adversely affect the operation of the IC. (9) Power dissipation The power dissipation will fluctuate depending on the mounting conditions of the IC and the ambient environment. Make sure to carefully check the thermal design of the application where these ICs will be used. (10) Power consumption The power consumption by the IC varies widely with the power supply voltage and the output current. Give full consideration to the power dissipation rating and the thermal resistance data and transient thermal resistance data, to provide a thermal design so that none of the ratings for the IC are exceeded. (11) ASO Make sure that the output current and supply voltage do not exceed the ASO values. (12) Precautions for input mode switching To ensure reliability, it is recommended that the mode switching for the motor pass once through the open mode. (13) There are no circuits built into these ICs that prevent in-rush currents. Therefore, it is recommended to place a current limiting resistor or other physical countermeasure. BA6219B / BA6219BFP-Y (14) If the potential of the output pin sways greatly and goes below the potential of ground, the operation of the IC may malfunction or be adversely affected. In such a c.


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