Motor driver ICs General use electronic governor BA6220 The BA6220 is a monolithic IC designed for controlling the speed of general-purpose DC motors. The IC consists of a reference voltage generator, current multiplier, comparator, and start-up circuit. The speed of DC motor is controlled by detecting the counter-electromotive force generated by the motor. Various DC motors can be driven by changing the external constants. A large power dissipation is allowed by grounding the pin connected with the IC substrate. Applications Radio cassette tape recorders Features 1) Wide range of operating voltage. (3.516V) 2) Large starting torque at low supply voltage. 3) Large power dissipation allowable by using the PCB as a heat sink. 4) Various DC motors can be driven by changing the external constants. Block diagram Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C) 517 Motor driver ICs BA6220 Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 12V) Measurement circuits 518 Application example Motor driver ICs BA6220 External dimensions (Units: mm) 519