Ordering number : ENA0760A STK681-300 Thick-Film Hybrid IC Forward/Reverse Motor Driver http://onsemi.com Overview The STK681-300 is a hybrid IC for use in current control forward/reverse DC motor driver with brush. Applications • Office photocopiers, printers, etc. Features • Allows forward, reverse, and brake operations in accordance with the external input signal. • 2.9A startup output current and 5A peak brake output current. • Incorporating a current detection resistor (0.10Ω), fixed current control is possible. • Obviate the need to design for the dead time in order to turn off the upper- and lower drive devices when switching between the forward and reverse operation mode. Specifications Absolute maximum ratings at Tc = 25°C Parameter Symbol Conditions Ratings unit Maximum supply voltage 1 VCC1 max VCC2=0V 52 V Maximum supply voltage 2 VCC2 max No signal -0.3 to +7.0 V -0.3 to +7.0 V 2.9 A 5 A Input voltage VIN max Logic input pins Output current IO max Brake current IOB max VCC2=5.0V, DC current VCC2=5.0V, square wave current, operating time 12ms (single pulse) Allowable power dissipation PdPK max Operating substrate temperature Tc max Junction temperature Tj max Storage temperature Tstg No heat sink 3.1 W 105 °C 150 °C -40 to +125 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 May, 2013 62911HKPC 018-08-0006/70908HKIM No. A0760-1/10 STK681-300 Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings unit Operating supply voltage 1 VCC1 With signals applied 10 to 42 V Operating supply voltage 2 VCC2 With signals applied 5±5% V Input voltage VIN 0 to VCC2 V Output current 1 IO1 VCC2=5.0V, DC current, Tc≤70°C 2.9 A Output current 2 IO2 VCC2=5.0V, DC current, Tc=90°C 2.4 A Output current 3 IO3 VCC2=5.0V, DC current, Tc=105°C 2.1 A Brake current IOB VCC2=5.0V, square wave current, operating time 1.3ms, Tc=105°C 5 A Refer to the graph for each conduction-period tolerance range for the output current and brake current. Electrical Characteristics at Tc = 25°C, VCC1 = 24V, VCC2 = 5.0V Parameter Symbol VCC2 supply current Conditions ICCO min typ max unit Forward or reverse operation 1.7 4 If=1A (RL=23Ω) 1.0 1.6 V mA FET diode forward voltage Vdf Output saturation voltage 1 Vsat1 RL=23Ω, TR1, TR2 0.80 1.1 V Output saturation voltage 2 Vsat2 RL=23Ω, F1, F2+current detection resistance 0.34 0.48 V 50 μA Output leak current IOL TR1, TR2, F1, and F2 OFF operation Input high voltage 1 VIH1 IN1, IN2 pins 4.0 Input high voltage 2 VIH2 INH pin 2.5 Input low voltage VIL IN1, IN2, INH pins Input current 1 IIH1 IN1, IN2 pins, VIH1=5V 0.10 Input current 2 IIH2 INH pin, VIH2=5V 0.30 Current set ting voltage Vref1 Between pins Vref1 and S.P V V 0.6 V 0.20 0.40 mA 0.60 1.2 mA 0.29 V Note: A fixed-voltage power supply must be used. Package Dimensions unit:mm (typ) 29.2 25.6 (20.47) 4.5 11.0 14.5 19 (3.5) 1 14.5 (R1.7) 7.2 14.4 (5.0) (5.0) (12.9) 2.0 1.0 (5.6) 0.52 18 1.0=18.0 4.2 0.4 8.2 (20.4) No. A0760-2/10 STK681-300 Derating Curve of Motor Current, IO, vs. STK681-300 Operating Board Temperature, Tc IO - Tc 3.5 Motor current, IO - A 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50 60 70 80 90 100 Operating Substrate Temperature, Tc- °C 110 ITF02506 The range of DC operating current lies within the above derating curve in the VCC1 allowable operating range. The above motor current IO is valid within the chopping operating range of VCC1=28V or lower. The above operating substrate temperature, Tc, is measured immediately when the motor is started. Since Tc fluctuates due to the ambient temperature, Ta, the motor current value, and continuous or intermittent operations of the motor current, always confirm this values using an actual set. STK681-300 Allowable Brake Current Range IOB - t 6 Brake Current, IOB - A 5 Tc=25°C 4 90°C 80°C 3 2 70°C 105°C 1 0 1.0 2 3 5 7 10 2 3 5 7 100 Conduction Time, t - ms 2 3 5 7 1000 ITF02507 No. A0760-3/10 STK681-300 Internal Block Diagram NC 11 NC VCC1 OUT1 OUT2 VCC1 NC 10 9 8 6 7 5 TR1 TR2 F1 F2 NC 4 IN1 12 13 IN2 15 VCC2 82kΩ Vref1a 16 Current control INH 14 RSI 19 Overheating current control 5.1kΩ Rs 0.10Ω RSO 3 1 GND 2 S.P Vref1b 18 17 Vref2 ITF02477 Sample Application Circuit STK681-300 VCC2=5V 15 7 IN1 12 9 IN2 13 INH 14 8 Vref2 17 6 C2 10μF/50V VCC1=24V OUT1 + CCW Motor OUT2 CW Vref1a 16 Vref1b 18 4 NC RSO 3 5 NC RSI 19 10 NC + C1 at least 47μF/50V 11 NC 2 1 GND S.P ITF02476 No. A0760-4/10 STK681-300 Motor Drive Conditions (H: High-level input; L: Low-Level Input) IN1 IN2 INH Stop 1 (standby) H H H or L Stop 2 (supply power turned off by input during H H H H L H L H H H L L Reverse (CCW) L H L Brake L L L or H motor rotation) Forward (CW) Remarks When motor is not rotating Stop signal that is applied when the motor is running and used to turn off power. No input signal is needed that turns off the upper- and lower-side drive devices when switching the rotational direction. GND side MOSFET ON * IN1=IN2=H and INH=L are prohibited during motor rotation. Notes (1) Be sure to set the capacitance of the power supply bypass capacitor, C1, so that the ripple current of the capacitor, which varies as motor current increases, falls within the allowed range. (2) Although the Vref2 pin is kept open, if connected to the GND or S.P pin, the overheating current control circuit ceases to function. (3) Fixed current chopping operations based on TR1 and TR2 are used for current control. The timing given below is used for OUT1 or OUT2 voltage output and for TR1 or TR2 collector current. OUT1 or OUT2 Output voltage VCC1-Vsat1 GND IO peak (current setting value) TR1 or TR2 Collector current 50μs Motor current 0A IO peak (current setting value) 0A (4) Do not connect the N.C pins shown in the internal block diagram or sample application circuit to a circuit pattern on the PCB. (5) This IC is not designed for use in an H-bridge driver for power supplies because the I/O response time of its GND side driving device, required when switching the motor rotational direction, is several scores of microseconds. It should be used only for DC motor drivers. No. A0760-5/10 STK681-300 (6) Sample Timing Diagram IN1 IN2 INH Forward rotation Stop 1 Brake Reverse rotation Brake Forward rotation Stop 2 Forward rotation Reverse rotation Stop 1 Stop 2 IN1 IN2 INH Forward rotation Stop 1 Brake Reverse rotation Reverse rotation Stop 1 Brake (7) Smoke Emission Precautions: There is a possibility of smoke emission if the hybrid IC is subjected to physical or electrical damage as the result of being used without compliance with the specifications. I/O Functions of Each Pin Pin Name Pin No. IN1 12 Function Input pin for turning TR1 and F1 ON and OFF At high level, TR1: ON and F1: OFF; at low level TR1: OFF and F1: ON IN2 13 Input pin for turning TR2 and F2 ON and OFF At high level, TR2: ON and F2: OFF; at low level, TR2: OFF and F2: ON INH 14 Pin for turning TR1 and TR2 OFF; At high level TR1 and TR2: OFF This pin is usually low or open. OUT1 8 This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. OUT2 6 This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. Vref1a 16 This pin is used for current setting for constant-current operation performed with the Vrefa and Vrefb pins Vref1b 18 connected A voltage of 0.29V at Tc=25°C results for Vref1. 0.29V is set by connecting 82kΩ and 5.1kΩ in series. Current detection resistance is Rs=0.10Ω. Set using IO peak=Vref1÷Rs. Vref2 17 Be sure to usually leave this pin open. S.P 2 Vref1 voltage can be lowered by connecting a resistor between the Vref1 and S.P pins. RSO 3 The overheating control circuit can be made to stop operating by connecting this pin to the GND or S.P pin. This pin is used to monitor the voltage across the current sensing resistor, Rs. Must be connected to the RSI pin. RSI 19 This pin is connected to the RSO pin and serves as an input to the circuit that compares the input with Vref1. No. A0760-6/10 STK681-300 Technical Information (1) Substrate temperature rise , ΔTc (no heat sink) - Internal average power dissipation, PdAV ΔTc - PdAV Substrate temperature rise, ΔTc - °C 80 70 60 50 40 30 20 10 0 0.5 0 1.0 1.5 2.0 2.5 3.0 Hybrid IC internal average power dissipation, PdAV - W 3.5 ITF02508 (2) Internal average power dissipation, Pd, in the DC current-motor current, IO, characteristics (typ values for Pd) Pd - IO VCC1=24V VCC2=5.0V 7 6 5 5° C 4 3 Tc =1 0 Internal average power dissipation, Pd - W 8 2 °C 25 1 0 0.5 0 1.0 1.5 2.0 2.5 3.0 Motor current, IO - A 3.5 ITF02509 (3) Overheating current control characteristics IO - Tc 3.5 Load 2Ω+5mH Average current, IO - A 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50 60 70 80 90 100 110 120 Operating substrate temperature, Tc- °C ITF02510 Overheating current control functions to prevent driver failure if a motor lock malfunction occurs. No. A0760-7/10 STK681-300 (4) Derating curve of the package power dissipation, PdPK, against the ambient temperature, Ta PdPK - Ta Allowable power dissipation, PdPK - W 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 20 40 60 80 100 120 Ambient temperature, Ta - °C ITF02511 The package power dissipation, PdPK, refers to the internal average power dissipation, Pd, permissible if used without a heat sink Vdf - If 1.4 Vsat1, Vsat2 - IO 1.6 VCC1=24V, VCC2=5.0V, Tc=25°C Tc=25°C T 1.4 ) , F2 (F1 f d V 1.2 Vsat1, Vsat2 - V 1.0 Vdf - V 1, TR 0.8 0.6 1.0 Vsat1 0.8 at2 f( Vd Vs 1.2 R2) 0.6 0.4 0.4 0.2 0.2 0 0 0 1 2 3 4 If - A 5 0 8pin-GND voltage, VOUT - V 2.0 Vsat1 - V 2A 1.5 2.9A 1.0 0.5 3 4 5 ITF02513 VOUT - VIH1 25 VCC1=24V, VCC2=5.0V, Tc=25°C, OUT1-OUT2, Pin load=1kΩ, 14pin=Low IO=1A 0 2.5 2 IO - A Vsat1 - VIH1 2.5 1 ITF02512 20 15 10 5 0 3.0 3.5 4.0 VIH1 - V 4.5 5.0 ITF02514 0 1 2 3 12pin-GND voltage, VIH1 - V 4 5 ITF02515 No. A0760-8/10 STK681-300 VOUT - VIH2 IIH1 - VIH1 250 VCC1=24V, VCC2=5.0V, Tc=25°C, OUT1-OUT2, Pin load=1kΩ, 12pin=High 20 VCC1=24V, VCC2=5.0V, Tc=25°C 200 15 IIH1 - μA 8pin-GND voltage, VOUT - V 25 10 5 150 100 50 0 0 1 0 2 3 4 5 14pin-GND voltage, VIH2 - V 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 ITF02517 TR1, TR2 - A.S.O 100 7 5 VCC1=24V, VCC2=5.0V, Tc=25°C 600 1.0 12, 13pin-GND voltage, VIH1 - V IIH2 - VIH2 700 0.5 ITF02516 Tc=25°C, Tj=150°C, Single pulse 3 2 IC - A 10m s 10 0m s 1s 3 2 200 1.0 7 5 100 3 μs 300 0 10 400 10 7 5 s 1m IIH2 - μA 500 2 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 14pin-GND voltage, VIH2 - V ID - A 100 7 5 3 2 5.0 ITF02518 0.1 1.0 2 3 5 7 10 -Vce - V 2 3 5 7 100 ITF02519 F1, F2 - A.S.O Tc=25°C, Tj=150°C, Single pulse 100 μs 10 7 5 3 2 1ms 10m s 100 ms 1s 1.0 7 5 3 2 0.1 7 5 3 2 0.01 1.0 2 3 5 7 10 VDS - V 2 3 5 7 100 ITF02520 No. A0760-9/10 STK681-300 Input Pin Configurations IN1, IN2 INH 14 12 or 13 1 1 ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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