MITSUBISHI <CONTROL / DRIVER IC> M54544L Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION DESCRIPTION PIN CONFIGURATION (TOP VIEW) The M54544L is a semiconductor integrated circuit that is capable of directly driving a smallsize bi-directional motor rotating in both forward and reverse directions. FEATURES VCC1 1 VCC’1 2 Output 2 O2 3 Input 1 IN1 4 GND 5 IN2 6 Input 2 APPLICATION Sound equipment such as tape deck and radio cassette, VTR, and other general consumer appliances Output 1 O1 7 Output power supply 2 VCC’2 8 Power supply 2 VCC2 9 M54544L ●Wide range of operating voltage (VCC=4 – 16V) ●Possible direct driving with TTL, PMOS and CMOS IC outputs ●Low output saturation voltage (large voltage across motors) ●Built-in clamp diode ●Large output current drive (IO(max) = ±1.2A) ●Provided with brake function Power supply 1 Output power supply 1 FUNCTION The M54544L 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 lowlevel (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 resistance of the motor is high (light load and small drive current: tens of mA), and VCC is larger than VCC’, current does not flow backward from the VCC pin to the VCC’ pin. Outline 9P9 LOGIC TRUTH TABLE Input IN1 L H L H IN2 L L H H Output Remarks O1 O2 “OFF” state “OFF” state No operation of IC ex Forward rotation H L Reverse rotation L H Brake L L BLOCK DIAGRAM Power supply 1 Output power supply 1 Output power supply 2 Power supply 2 VCC1 VCC’1 Output 2 Output 1 O2 O1 VCC’2 VCC2 1 2 3 7 8 9 4 5 6 IN1 Input 1 GND IN2 Input 2 MITSUBISHI <CONTROL / DRIVER IC> M54544L Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise noted) Symbol VCC(1) VCC(2) VCC’ VI VO IO(max) IO(1) IO(2) Pd Topr Tstg Parameter Conditions Supply voltage(1) Supply voltage(2) Output supply voltage Input voltage Output voltage Allowable motor rush current Continuous output current(1) Continuous output current(2) Power dissipation Operating temperature Storage temperature With an external heat sink (3000mm2 x 1.5mm) top=10ms : cycle time 0.2Hz or less With an external heat sink (3000mm2 x 1.5mm) Ta=75˚C Ratings Unit -0.5 – +16 -0.5 – +20 -0.5 – +16 0 – VCC -0.5 – VCC’+2.5 ±1.2 ±330 ±600 1.15 -10 – 75 -55 – 125 V V V V V A mA mA W °C °C RECOMMENDED OPERATING CONDITION (Ta=25°C, unless otherwise noted) Symbol VCC IO VIH VIL tB Parameter Conditions Supply voltage Output current “H” input voltage “L” input voltage Motor braking interval Min. 4 Limits Typ. 12 2 0 10 100 Min. Limits Typ. Max. 15 ±300 VCC 0.4 Unit V mA V V ms ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise noted) Symbol IO(leak) VOH(1) VOH(2) Parameter Output leak current “H” output saturation voltage(1) “H” output saturation voltage(2) VOL(1) “L” output saturation voltage(1) VOL(2) “L” output saturation voltage(2) IIH(1) IIH(2) “H” input current(1) “H” input current(2) ICC Supply current Test conditions VO=20V VO=0V VCC=VCC’=20V VI1=VI2=0V VCC=VCC’=12V VI1=2V VI2=0V VCC=VCC’=12V VI1=0V VI2=2V VI1=0V VI2=2V VI1=VI2=2V VI1=2V VI2=0V VCC=VCC’=12V VI1=VI2=2V VCC=VCC’=12V, VI1=2V, VI2=0V VCC=VCC’=12V, VI1=0V, VI2=2V VCC=VCC’=12V VCC=VCC’=16V Output open IOH(1)=-300mA IOH(1)=-500mA IOH(2)=-300mA IOH(2)=-500mA IOL(1)=300mA 10.8 10.7 10.8 10.7 IOL(1)=500mA IOL(2)=300mA IOL(2)=500mA 11.2 11.1 11.2 11.1 0.18 0.3 0.3 0.18 0.3 0.3 70 70 VI1=2V, VI2=0V VI1=0V, VI2=2V VI1=VI2=2V VI1=VI2=0V Max. 100 -100 Unit µA V V 0.5 0.65 0.65 0.5 0.65 0.65 200 200 V V µA µA 30 60 0 mA MITSUBISHI <CONTROL / DRIVER IC> M54544L Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION TYPICAL CHARACTERISTICS Thermal Derating (Absolute Maximum Rating) Power Dissipation Pd(max) (W) 8 When Al heat sink of 25cm2 x 1.5mm(t) is used 6 4 Free Air 2 0 0 25 50 75 100 Ambient Temperature Ta (°C) “H” Output Saturation Characteristics “L” Output Saturation Characteristics -600 600 VCC=VCC’=12V Ta=75˚C 500 “L” Output Current IOL (mA) “H” Output Current IOH (mA) -500 Ta=75˚C -400 Ta=50˚C -300 Ta=25˚C -200 Ta=-20˚C -100 Ta=50˚C 400 Ta=25˚C 300 Ta=-20˚C 200 100 VCC=VCC’=12V 0 0.0 0.2 0.4 0.6 0.8 “H” Output Voltage VCC’– VOH (V) 1.0 0 0.0 0.2 0.4 0.6 0.8 “L” Output Voltage VOL (V) 1.0 MITSUBISHI <CONTROL / DRIVER IC> M54544L Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION CAUTIONS Since pass current of 2 to 4A flows from the power supply to the GND for the period of 2 to 4µs when a mode is switched to another, be sure to put the capacitance of 10 to 100µF between the output power supply and the GND. When the motor back electromotive force is large with the brakes applied, for example, malfunction may occur in internal parasitic Di. If flyback current of 1A or more flows, add Schottky Di to the portion between the output and the GND. When the IC is used at a high speed for PWM, etc., note that switching of output results in delay of approx. 10µs. APPLICATION EXAMPLES 1) When VCC and VCC’ are used as the same power supply R2=3Ω VB R1=2Ω VCC’2 C 10 – 100µF VCC’1 M Input 1 Input 2 VCC1 VCC2 9 8 7 6 5 4 3 2 1 M54544L 2) When VCC is used as a fixed power supply and VCC’ is used as a variable power supply VCC 2Ω C C 10 – 100µF VCC’1 VCC’2 1 – 10µF M Input 1 Input 2 VCC1 VCC2 9 8 7 6 5 4 M54544L 3 2 1