M54685L Datasheet - Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR

MITSUBISHI M54685L Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR DESCRIPTION The M54685L is a semico...

MITSUBISHI M54685L Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR DESCRIPTION The M54685L is a semiconductor integrated circuit that is capable of directly driving a smallsize bi-directional motor rotating in both forward and reverse directions. PIN CONFIGURATION (TOP VIEW) Output 1 FF speed control O1 FSC RSC O2 GND Speed control R input L input Standby input Power supply PSC R L STB VCC 1 2 3 4 FEATURES q Wide range of operating voltage (VCC = 4.5 – 14V) q Possible direct driving with TTL, PMOS and CMOS outputs q Small outline (10-pin SIP) q Built-in clamp diode q Low output saturation voltage (large voltage across motors) q Large output current drive (IO(max) = 500mA) q Provided with brake functions q Built-in thermal shutdown protection circuit REW speed control Output 2 M54685L 5 6 7 8 9 10 APPLICATION Micro-cassette for phone-answering machine, tape deck, radio cassette, and other sound equipment, and VTR and general consumption appliances Outline 10P5 FUNCTION The M54685L is an IC that can control the forward rotation, reverse rotation and speed of small DC brush motor. For the basic operation of this IC, output modes are selected, as shown in the logic truth table at right, by applying appropriate TTLlevel input to R, L and STB inputs. The PLAY mode is a mode where speed is controllable and is used to control the speed of motor by using two resistances, RT and RS, as shown in the application example. RT and RS are generally given by the foll...