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| MITSUBISHI M54641L/FP Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION DESCRIPTION The M54641 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 VCC Output 2 O2 IN1 GND Output voltage control Input 2 Output 1 VZ IN2 O1 1 2 3 FEATURES q Wide range of operating voltage (VCC = 4 - 10V,VCC'(max) = 20V) q Low output saturation voltage in stationary motor circuit (large voltage across motors) q Built-in clamp diode q Provided with output voltage control pin (VZ) q Built-in thermal shutdown circuit (Tj(shut) = 120C standard) Input 1 M54641L 4 5 6 7 8 APPLICATION Sound equipment such as tape deck and radio cassette, and VTR Output power VCC' supply Outline 8P5 FUNCTION The M54641 is an IC for driving a smallsize bi-directional motor that rotates in both forward and reverse directions. Giving signal to inputs IN1 and IN2 outputs the signal of the same phase to output pins O1 and O2. That is, giving high-level signal to input IN1 and low-level signal to input IN2 sets output O1 to high-level and output O2 to low-level. Connection of a motor between output pins O1 and O2 uses O1 as an output current source and O2 as an output current sink to rotate the motor. In addition, giving the reverse signal to inputs IN1 and IN2 sets O1 and O2 to low-level and highlevel, respectively, resulting in rotating the motor reversely. However, when both IN1 and IN2 are set to "H", both O1 and O2 are set to low-level, resulting in sudden stop of motor rotation. (Brake mode) If the Zener diode of certain voltage, for example, is added to the VZ pin, the output "H" voltage does not rise over the Zener voltage and the motor rotates at constant speed. If the VZ pin is connected to the output power supply VCC' pin, the rotating speed of the motor can be varied by varying the VCC' voltage. The motor rush current and the current with the motor put in stationary status are as follows: Iop(max) = 800mA and IO(max) = 150mA. Output voltage control Input 2 Output 1 VZ IN2 O1 1 2 3 4 5 6 7 8 9 10 GND IN1 O2 Input 1 Output 2 M54641FP Output power VCC' supply NC VCC Power supply NC Outline 10P2-C NC: no connection LOGIC TRUTH TABLE Input IN1 L H L H IN2 L L H H O1 "OFF" state Output O2 "OFF" state Remarks No operation of IC ex Forward rotation Reverse rotation Brake H L L L H L BLOCK DIAGRAM Power supply VCC Output power supply VCC' Constant voltage source VZ Output voltage control Input 1 IN1 Input circuit Control circuit Output circuit O2 Output 2 Input 2 IN2 Input circuit Output circuit O1 Output 1 GND MITSUBISHI M54641L/FP Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION Though the IC is equipped with a thermal shutdown circuit for prevention against thermal breaking, the threshold temperature is set to 100C min. Set the driving current in such a way that this thermal shutdown circuit cannot operate during normal operation. INPUT/OUTPUT CIRCUIT 1 Input circuit VCC 2 Output circuit VZ VCC' Output 1k 15k Input IN GND GND ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted) Symbol VCC VCC' VI VO IO(max) IO Pd Tj Topr Tstg Parameter Supply voltage Output Supply voltage Input voltage Output voltage Allowable motor rush current Continuous output current Power dissipation Junction temperature Operating temperature Storage temperature Conditions Ratings -0.5 - +12 -0.5 - +20 0 - VCC -0.5 - VCC'+2.5 800 150 570 100 -10 - 60 -55 - 125 Unit V V V V mA mA mW C C C VI RECOMMENDED OPERATING CONDITION (Ta = 25C, unless otherwise noted) Symbol VCC IO VIH VIL tS TS Supply voltage Output current "H" input voltage "L" input voltage Motor braking interval Operation temperature of thermal protection circuit (junction temperature) Parameter Conditions Min. 4 3.0 0 10 100 Limits Typ. 5 Max. 10 100 VCC 0.6 100 120 Unit V mA V V ms C MITSUBISHI M54641L/FP Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION ELECTRICAL CHARACTERISTICS (Ta=25C, VCC = 5V, unless otherwise noted) Symbol IO(leak) VOH VOL VO1-O2 II Parameter Output leak current "H" output saturation voltage "L" output saturation voltage Voltage between outputs (1) and (2) (Voltage across Motor) Input voltage VCC' = 20V VZ: Open VCC' = 12V VZ: Open VCC' = 12V VZ: Open VCC' = 12V VZ = 7V VCC' = 12V VCC = 10V VCC' = 12V Output OPEN VI = 3V VI = 5V Test conditions VO = 20V VO = 0V IOH = -50mA IOH = -100mA IOH = 50mA IOH = 100mA IO = 100mA Output open In "OFF" state Forward rotation or reverse rotation Braking Min. Limits Typ. Max. 100 -100 Unit A V 0.3 0.4 7.7 180 380 3.0 8.0 12.0 V V A 10.2 10.0 10.5 10.4 0.1 0.2 7.0 100 240 1.2 4.5 7.5 6.3 ICC Supply current mA TYPICAL CHARACTERISTICS Condition * With basic installation (epoxy board of 5cm x 5cm x 0.8mmt with copper foil on a single side) * t : Power apply time Thermal Derating (M54641FP) (Absolute Maximum Rating) 0.8 Thermal Derating (M54641L) (Absolute Maximum Rating) 1.6 1.4 Power Dissipation Pd(max) (W) 1.2 t= 1.0 0.8 0.6 0.4 0.2 0 0 25 50 60 75 100 Ambient Temperature Ta (C) Power Dissipation Pd(max) (W) t = 10sec 0.6 t = 20sec 0.4 0.2 0 0 25 50 60 75 100 Ambient Temperature Ta (C) "H" Output Saturation Characteristics -200 Ta = 25C VCC' = 12V VZ = Open "L" Output Current IOL (mA) -150 150 200 "L" Output Saturation Characteristics Ta = 25C VCC' = 12V VZ = Open "H" Output Current IOH (mA) -100 100 -50 50 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 "H" Output Voltage VCC'-VOH (V) 0 0 0.1 0.2 0.3 0.4 0.5 "L" Output Voltage VOL (V) MITSUBISHI M54641L/FP Bi-DIRECTIONAL MOTOR DRIVER WITH BRAKE FUNCTION APPLICATION EXAMPLE 2 3 VB VB 10 - 100F 3 10 - 100F M IN1 IN2 8 7 6 5 4 3 2 1 IN1 10 9 8 7 6 M54641L M M54641FP 1 2 3 4 5 CAUTIONS Since the thermal protection function of this IC may not work in abnormal status (oscillation, low supply voltage, output shortcircuit, etc.), check the operation in the IC installation status when using this function. 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. IN2 2 |
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