NJM2611M-TE1

NJM2611 SERVO MOTOR CONTROLLER ■ GENERAL DESCRIPTION The NJM2611 is an integrated circuit to be applied on servo motor of radio controlled operation. Wide range of operating voltage, and the NJM2611 has the feature of internal circuit of maintaining constant voltage which helps stabilizing from fluctuation caused by voltage source and the ambient temperature. ■ PACKAGE OUTLINE NJM2611D ■ FEATURES ● Wide Operating Voltage ● Setting up the dead band by the internal constant ● Internal Output NPN Power Transistor ● Internal Constant Voltage Circuit ● Package Outline DIP16, DMP16 ● Bipolar Technology NJM2611M ■ BLOCK DIAGRAM NJM2611D / M Ver.2003-12-09 -1- NJM2611 (V+=6V, Ta=25°C) ■ ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT 10.0 V + Supply Voltage V Power Dissipation PD Output Sink Current Isink 600(note) mA Operating Temperature Range Topr -20 to +75 °C Storage Temperature Range Tstg -40 to +125 °C (DIP16) (DMP16) 700 350 mW (note) Due to the pulse driving, the peak current must be maintained within the range of the maximum ratings. (V+=6V, Ta=25°C) ■ ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL TEST CONDITION + MIN. TYP MAX. UNIT. Operating Voltage V 2.5 - 7.5 V Operating Current ICC - 7.5 10.0 mA Minimum Input Pulse Voltage Range VIN 1.85 - - V Regulator Voltage Vreg 2.0 2.15 2.3 V At the balanced output + Line Regulation Vlin V =2.5 to 8.5V - - 30 mV Output Saturation Voltage Vsat Load 12Ω - - 0.5 V Dead Band TDB - 4.0 - µs -2- Ver.2003-12-09 NJM2611 ■ PIN DESCRIPTION PIN NO. PIN FUNCTION 1 VIN 2 RREF Ver.2003-12-09 DESCRIPTION INSIDE EQUIVALENT CIRCUIT Input the positive pulse of more than 1.85V. Constant output voltage of 1.25V (typical). Through the resistor which is connected to this pin, and setting up the constant current to make the saw tooth sweep at pin 14. Connect the capacitor of approximately 1000pF with the resistor on paralel. -3- NJM2611 PIN NO. PIN FUNCTION DESCRIPTION 3 Vreg Connect the resistors along to the motor inter-locking potentiometer pulse stretcher. Connect the capacitor of more than 0.1µF. 4 PS1 Connect the resistor between Vref. The pulse gain can be decided by this resistor and the capacitor connected to pin 5. 5 PS2 Connect the capacitor between GND. The pulse gain can be decided by this condensor and the resistor connected to pin 4. -4- INSIDE EQUIVALENT CIRCUIT Ver.2003-12-09 NJM2611 PIN NO. PIN FUNCTION DESCRIPTION 6 PSV Nomally, this pin is used on the open state of operation. Especially, when it is reguired to make the adjustment of the dead band, connect the resistor between GND and then the dead band can be made it's expansion. (Refere to, dead band pin 6 voltage vs. pin 6 sink current characteristic) 7 NC No connect 8 GND1 System GND. 9 PNP1 Connect the external PNP transistor (Q2) base. 10 GND2 Power GND Large pulse current is running therefore, connect the line by separating from the system GND Ver.2003-12-09 INSIDE EQUIVALENT CIRCUIT -5- NJM2611 PIN NO. PIN FUNCTION DESCRIPTION 11 OUT1 Connect the collector of the external PNP transistor, the base of which is connected to pin 9. Connect the motor between pin 13. 12 PNP2 Connect the external PNP transistor (Q1) base. 13 OUT2 Connect the collector of the external PNP transistor, the base of which is connected to pin 12. Connect the motor between pin 11 -6- INSIDE EQUIVALENT CIRCUIT Ver.2003-12-09 NJM2611 PIN NO. PIN FUNCTION DESCRIPTION 14 CP Connect the sawtooth wave generating capacitor. The motor's position shall be decided at the peak point of sawtooth wave, so that it is advisabled to select the higher precision capacitor as well as the resistor connected to pin 2. 15 COMP The center part of potentiometer of motor motion is to be connected. The capacitor of about 0.1µF is to be connected between GND for preventing noise. The center location can be adjusted by putting the resistor in series with the potentiometer. 16 V+ Ver.2003-12-09 INSIDE EQUIVALENT CIRCUIT Power Supply -7- NJM2611 ■ TYPICAL APPLICATION Notes (1) VR1 : Potentiometer coupled mechanically to the servo motor (2) VR2 : Adjusting the motor center location (3) Hunching prevention 0.01µF Capacitor between pin 11 and GND 0.01µF Capacitor between pin 13 and GND Diode between pin 11 and power supply Diode between pin 13 and power supply 100Ω Resistor between pin 11 and pin 13 680kΩ Resistor between pin 11 and GND -8- Ver.2003-12-09 NJM2611 ■ TYPICAL CHARACTERISTICS Operating Current vs. Operating Voltage Dead Band Pin 6 Voltage vs. Pin 6 Sink Current Regulator Voltage vs. Operating Voltage Regulator Voltage vs. Temperature [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2003-12-09 -9-