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MITSUBISHI
M54544L
Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
DESCRIPTION
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.
PIN CONFIGURATION (TOP VIEW)
Power supply 1
VCC1 VCC'1 O2 IN1 GND
1 2 3
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) = 1.2A) qProvided with brake function
Output power supply 1 Output 2 Input 1
M54544L
4 5 6 7 8 9
Input 2 Output 1
IN2 O1 VCC'2 VCC2
APPLICATION
Sound equipment such as tape deck and radio cassette, VTR, and other general consumer appliances
Output power supply 2 Power supply 2
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 VCC1 1 Output power supply 1 VCC'1 2 Output 2 Output 1 O2 3 O1 7 Output power supply 2 VCC'2 8 Power supply 2 VCC2 9
4 IN1 Input 1
5 GND
6 IN2 Input 2
MITSUBISHI
M54544L
Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted)
Symbol VCC(1) VCC(2) VCC' VI VO IO(max) IO(1) IO(2) Pd Topr Tstg Parameter 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 Conditions Ratings -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 Unit V V V V V A mA mA W C C
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=75C
RECOMMENDED OPERATING CONDITION (Ta=25C, unless otherwise noted)
Symbol VCC IO VIH VIL tB Supply voltage Output current "H" input voltage "L" input voltage Motor braking interval Parameter Conditions Min. 4 2 0 10 Limits Typ. 12 Max. 15 300 VCC 0.4 Unit V mA V V ms
100
ELECTRICAL CHARACTERISTICS (Ta=25C, unless otherwise noted)
Symbol IO(leak) VOH(1) VOH(2) Parameter Output leak current "H" output saturation voltage(1) "H" output saturation voltage(2) "L" output saturation voltage(1) "L" output saturation voltage(2) "H" input current(1) "H" input current(2) VCC=VCC'=20V VI1=VI2=0V VCC=VCC'=12V VCC=VCC'=12V VI1=2V VI2=0V VI1=0V VI2=2V VI1=0V VI2=2V VI1=VI2=2V Test conditions VO=20V VO=0V IOH(1)=-300mA IOH(1)=-500mA IOH(2)=-300mA IOH(2)=-500mA IOL(1)=300mA IOL(1)=500mA IOL(2)=300mA IOL(2)=500mA 70 70 VI1=2V, VI2=0V VI1=0V, VI2=2V VI1=VI2=2V VI1=VI2=0V 10.8 10.7 10.8 10.7 11.2 11.1 11.2 11.1 0.18 0.3 0.3 0.18 0.3 0.3 Min. Limits Typ. Max. 100 -100 Unit A V V 0.5 0.65 0.65 0.5 0.65 0.65 200 200 30 60 0 mA
VOL(1)
VCC=VCC'=12V
V
VOL(2) IIH(1) IIH(2)
VI1=2V VI2=0V 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
V A A
ICC
Supply current
MITSUBISHI
M54544L
Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION
TYPICAL CHARACTERISTICS
Thermal Derating (Absolute Maximum Rating)
8 When Al heat sink of 25cm2 x 1.5mm(t) is used 6
Power Dissipation Pd(max) (W)
4
2
Free Air
0
0
25
50
75
100
Ambient Temperature Ta (C)
"H" Output Saturation Characteristics
-600 VCC=VCC'=12V -500 "H" Output Current IOH (mA) "L" Output Current IOL (mA) Ta=75C -400 -300 -200 Ta=-20C -100 0 0.0 Ta=50C Ta=25C 500 600
"L" Output Saturation Characteristics
Ta=75C Ta=50C 400 Ta=25C 300 Ta=-20C 200 100 VCC=VCC'=12V 0 0.0
0.2
0.4
0.6
0.8
1.0
0.2
0.4
0.6
0.8
1.0
"H" Output Voltage VCC'- VOH (V)
"L" Output Voltage VOL (V)
MITSUBISHI
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 4s when a mode is switched to another, be sure to put the capacitance of 10 to 100F 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. 10s.
APPLICATION EXAMPLES
1) When VCC and VCC' are used as the same power supply
R2=3 VB R1=2 C 10 - 100F Input 2 VCC1 VCC2 9 8 7 6 5 4 3 2 1 VCC'2 M VCC'1 Input 1
M54544L
2) When VCC is used as a fixed power supply and VCC' is used as a variable power supply
VCC 2 C 1 - 10F M Input 2 VCC1 VCC2 9 8 7 6 5 4 3 2 1 VCC'1 C 10 - 100F VCC'2
Input 1
M54544L

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