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MITSUBISHI M51660L SERVO MOTOR CONTROL FOR RADIO CONTROL DESCRIPTION The M51660L is a semiconductor integrated circuit for use in servo motor control in radio control applications. Housed in a 14-pin molded plastic zig-zag inline package (ZIP), the M51660L contributes to the miniaturization of the set. The built-in voltage regulating circuit, and the differential comparator used in the comparator circuit provide the M51660L with extremely stable power supply voltage fluctuation characteristics and temperature change characteristics. PIN CONFIGURATION (TOP VIEW) Servo position voltage Timing capacitor Timing resistor External PNP transistor drive (1) Input 1 2 3 4 5 6 7 GND 8 Error pulse output 9 FEATURES q Small circuit current 3.5mA typ. (When output is off) q Excellent power supply and temperature stability q Simple setting of dead band q Includes protection circuit for continuous "H" level input ************************************* Output (1) M51660L Output (2) 10 Stretcher input 11 External PNP transistor drive (2) 12 Regulated voltage output 13 Supply 14 APPLICATION Digital proportional system for radio control, and servo motor control circuit, etc. RECOMMENDED OPERATING CONDITIONS Supply voltage range * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *3.5 - 7V Rated supply voltage * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 4.8V Outline 14P5A BLOCK DIAGRAM Supply (4.8V) 14 7 GND 8 VCC 4 Input External PNP transistor drive (1) Output (1) 5 Control logic circuit Flip-flop Output drive circuit 6 10 Output (2) 12 External PNP transistor drive (2) One-shot multivibrator Pulse stretcher Voltage regulating circuit 13 Regulated voltage output 1 2 3 9 Error pulse output 11 Stretcher input Timing Servo position Timing voltage input capacitance resistor MITSUBISHI M51660L SERVO MOTOR CONTROL FOR RADIO CONTROL ABSOLUTE MAXIMUM RATINGS (Ta = 25C, unless otherwise noted) Symbol VCC IO SINK IO SOURSE Pd K Topr Tstg Parameter Supply voltage Output sink current Output source current Power dissipation Thermal derating range Operating temperature Storage temperature range Conditions Ratings 7.5 500 200 550 5.5 -20 - +75 -40 - +125 Unit V mA mA mW mW/C C C Ta 25C ELECTRICAL CHARACTERISTICS (Ta = 25C and VCC = 4.8V, unless otherwise noted) Symbol ICC VOL VOH IPNP VReg IReg TDB Circuit current Output voltage "L" Output voltage "H" External PNP transistor Drive current Internal regulated supply voltage Internal regulated supply output current Minimum dead band width Parameter Test conditions When output is OFF When output is ON IO SINK = 100mA IO SINK = 400mA IO SOURCE = 100mA Min. Limits Typ. 3.5 20 0.1 0.4 3.8 Max. 5 0.2 0.7 Unit mA V V mA 2.45 2.6 3.0 1.5 V mA s 3.4 30 2.3 RDB = 510, CS = 0.1F TYPICAL CHARACTERISTICS (Ta = 25C, unless otherwise noted) Thermal derating (maximum rating) 1000 8 When output is OFF 800 Circuit current vs. supply voltage Internal power dissipation Pd (mW) Circuit current ICC (mA) 25 50 75 100 125 6 600 4 400 200 2 0 0 0 0 2 4 6 8 Ambient temperature Ta (C) Supply voltage VCC (V) MITSUBISHI M51660L SERVO MOTOR CONTROL FOR RADIO CONTROL Internal regulated supply voltage vs. supply voltage Internal regulated supply voltage VReg (V) 4 1000 7 5 Output voltage "L" vs. output sink current VCC = 4.8V Output voltage "L" VOL (mV) 0 2 4 6 8 3 100 7 5 3 10 7 5 3 1 3 2 1 0 1 3 5 7 10 3 5 7 100 3 5 7 1000 Supply voltage VCC (V) Output sink current ISINK (mA) Deadband width vs. deadband resistance Stretcher capacitance CS = 0.1F Deadband width TDB (s) 10 5 0 0 1k 2k Deadband resistance RDB () APPLICATION EXAMPLE Servo motor control circuit for radio-controlled 2SA695 2SA695 10 VCC M 0.1 560k 2 4 6 8 10 12 14 M51660L 1 3 0.03 5 7 9 1k 11 13 180k 0.1 2.2 Unit Resistance : Capacitance : F 0.1 18k 5k Input MITSUBISHI M51660L SERVO MOTOR CONTROL FOR RADIO CONTROL TECHNICAL APPLICATION NOTES PIN DESCRIPTION 1. Servo Position Voltage Input Pin (Pin 1 ) Connect the potentiometer terminal for position detection that follows the output axis. Compare this voltage with the voltage of the triangular wave of pin 2 and drive the motor. A capacitor of approximately 0.1F should be connected for noise prevention. 2. Timing Capacitor Pin (Pin 2 ) Connect a capacitor that will generate a triangular wave by constant current charging. A typical value is 0.1F. Also connect a feedback resistor from the output here. 3. Timing Resistor (Pin 3 ) Connect a resistor that will determine the value of the constant current of pin 2 . A resistor of 18k will yield a current of 1.0mA. A capacitor of approximately 0.03F should be connected in parallel with the resistor to increase stability. 4. External PNP Transistor Drive 1 (Pin 4 ) Connect to the base of the external PNP transistor. 5. Input Pin (Pin 5 ) Operate with a positive pulse of peak value 3V or greater. 6. Output 1 Pin (Pin 6 ) Connect a feedback resistor between this pin and pin 2 . 7. Ground (pins 7 and 8 ) 8. Error Pulse Output pin (Pin 9 ) Connect a resistor between this pin and pin 11 . The dead band will change according to the value of this resistor. 9. Output 2 pin (Pin 10 ) This is the output 2 pin. 10. Stretcher Input Pin (Pin 11 ) Connect the capacitor and resistor of the pulse stretcher section. 11. External PNP Transistor Drive 2 (Pin 12 ) Connect to the base of the external PNP transistor. 12. Regulated Voltage Output Pin (Pin 13 ) This is the output of the internal regulated supply voltage. Make connections from this pin to a potentiometer or pulse stretcher resistor. Connect a capacitor of approximately 2.2F for stability. 13. Supply Voltage (Pin 14 ) The supply voltage exhibits uniform characteristics from 3.5V to 7V. Connect a capacitor of approximately 10F. |
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