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M54544AL Datasheet(PDF) 1 Page - Mitsubishi Electric Semiconductor |
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M54544AL Datasheet(HTML) 1 Page - Mitsubishi Electric Semiconductor |
1 / 4 page Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION AND THERMAL SHUT DOWN FUNCTION M54544AL MITSUBISHI <CONTROL / DRIVER IC> PIN CONFIGURATION (TOP VIEW) DESCRIPTION The M54544AL is a semiconductor integrated circuit that is capable of directly driving a smallsize bi-directional motor rotating in both forward and reverse directions. FEATURES qWide range of operating voltage (VCC=4 – 16V) qPossible direct driving with TTL, PMOS and CMOS IC outputs qLow output saturation voltage (large voltage across motors) qBuilt-in clamp diode qLarge output current drive (IO(max)= ±1.5A) qProvided with brake function qBuilt-in thermal shutdown protection circuit APPLICATION Sound equipment such as tape deck and radio cassette, VTR, and other general consumer appliances FUNCTION The M54544AL is an IC for driving a smallsize bi-directional motor that rotates in both forward and reverse directions. When both inputs 1 and 2 are set to low-level, outputs 1 and 2 are set to “OFF”. When input 1 is set to high-level and input 2 is set to low- level, output 1 is set to high-level and output 2 is set to low-level (forward rotation status). When input 1 is set to low-level and input 2 is set to high-level, output 1 is set to low-level and output 2 is set to high-level (reverse rotation). When both inputs 1 and 2 are set to high-level, both outputs 1 and 2 are set to low-level (brake status). The power supply (VCC) to the control circuit and the power supply (VCC’) for output are independently provided. The rotating speed of the motor can be therefore changed by using VCC and VCC’ as different power supplies and by making VCC or VCC’ variable. If the motor resistance is high (light load and small driving current: tens of mA), and VCC is larger than VCC’, current does not flow backward from the VCC pin to VCC’ pin. Outline 9P9 1 4 3 2 5 6 7 8 IN1 VCC1 VCC’1 GND IN2 VCC’2 9 VCC2 O1 Input 1 Power supply 1 Output power supply 1 Input 2 Output power supply 2 Power supply 2 Output 2 Output 1 O2 Input Output Remarks IN1 IN2 LL HL LH HH “OFF” state “OFF” state HL LH LL O1 O2 No operation of IC ex Forward rotation Reverse rotation Brake LOGIC TRUTH TABLE BLOCK DIAGRAM 1 3 7 9 4 5 6 IN1 VCC’1 VCC1 O2 Output power supply 1 Output 1 Power supply 1 O1 Output 2 VCC’2 Output power supply 2 VCC2 Thermal protection circuit Input 1 IN2 Input 2 GND Power supply 2 In addition, built-in thermal protection circuit protects the IC from thermal destruction in case of abnormal condition such as motor blocking. Input control circuit 2 8 |
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