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| NTE1716 Integrated Circuit Reversible Motor Driver for VCR Features: D Supply Voltage Range: 6V to 18V D Power Dissipation: 2200mW D Output Motor Driving Current up to 1600mA D Two Control Logic Inputs Allow Switching of Three Output States: Forward Reverse Braking D Low Standby Current D Adjustable Output Voltage Enables Motor Speed Control Using Control Pin Voltage D Interfaces with CMOS Devices D Built-In Components to Absorb Motor Rush Currents Applications: D Video Tape Recorders D Cassette Tape Recorders Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Power Dissipation (TA = +25C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2200mW Derate Above +25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22mW/C Output Current (Pulse Width = 500s, Duty Cycle = 1%), IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6A Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Recommended Operating Conditions: (TA = +25C unless otherwise specified) Parameter Supply Voltage 1 (Logic) Supply Voltage 2 (Motor) Symbol VCC1 VCC2 Test Conditions Min 6 6 Typ - - Max 18 18 Unit V V Electrical Characteristics: (TA = +25C, VCC1 = 12V unless otherwise specified) Parameter Current Consumption Minimum Input ON Current Input Threshold Voltage Output Leakage Current Output Voltage Symbol ICC IIN VTH IOL VO Test Conditions FIN = RIN = GND, RL = Infinity RL = Infinity RL = Infinity FIN = RIN = GND, RL = Infinity RL = 60, ZD = 7.4V Min - - 0.7 - 6.6 Typ 5.5 10 1.2 - 7.2 Max 10 50 2.0 1.0 - Unit mA A V mA V Logic Inputs and Outputs FIN LOW HIGH LOW HIGH RIN LOW LOW HIGH HIGH Vout1 LOW HIGH LOW LOW Vout2 LOW LOW HIGH LOW Circuit Operation: Forward and Reverse Control By changing the direction of current flow between OUT1 and OUT2, the direction of motor rotation is changes (Refer to the input-output truth table). When FIN is HIGH and RIN in LOW, current flows from OUT1 to OUT2. When FIN is LOW and RIN is HIGH, current flolws from OUT2 to OUT1. Forced Stop Setting RIN and FIN both HIGH or both LOW puts both output pins at the same potential, shutting off the supply current to the motor. When this happens, the motor generates a reverse current that produces a braking action. Rush Current Absorption Circuit The high voltage that appears on the OUT1 and the OUT2 (when the motor reverses) is sensed by an internal comprator, which turns on an internal circuit that absorbs the rush current. Drive Circuit The drive circuit supplies the current necessary to drive a motor connected between the OUT1 and OUT2 terminals. The forward direction of the motor is the direction of rotation when current flows from OUT1 to OUT2 and the reverse direction is the direction of rotation when current flows from OUT2 to OUT1. The output voltage (VOUT) applied to the motor is given by the equation: VOUT (V) = VZD - VCE(sat) = VZD - 0.2(IOUT = 100mA) where: VZD is the voltage across the zener diode connected between Pin4 (VREF) and ground. If Pin4 is left open, the output vootage (VOUT) is given by the equation: VOUT (V) = VCC1 - VCE(sat) (PNP) - 2VF - VCE(sat) = VCC1 - 1.8(IOUT = 100mA) Pin Connection Diagram (Front View) 10 VOUT (2) 9 8 7 6 5 4 3 2 1 VZ (2) VCC (2) VCC (1) Input (Reverse) Input (Forward) VREG VZ (1) VOUT (1) GND 1.043 (26.5) .984 (25.0) .141 (3.6) .409 (10.4) .700 (17.78) 1.063 (27.0) .330 (8.38) .251 (6.4) 1 10 .100 (2.54) .897 (22.8) .070 (1.78) |
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