Ordering number : ENA1929A STK681-352-E Thick-Film Hybrid IC Forward/Reverse Motor Driver Overview The STK681-352-E 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. • 8A peak startup output current and 12A peak brake output current. • On-chip output short-circuit detection function. • Reduced voltage detection function (15V) for a motor supply voltage. • Connecting an external current detection resistor allows overcurrent detection and peak current control in the PWMoperation mode. • Obviate the need to design for the dead time in order to turn off the upper- and lower drive devices when switchingbetween the forward and reverse operation mode. 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To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 70611HKPC 018-10-0042/30211HKPC No.A1929-1/14 STK681-352-E Specifications Absolute Maximum Ratings at Tc = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings unit VCC max 38 Input voltage VIN max Logic input pins Output current 1 IO1 max DC current Output current 2 IO2 max Output current 3 IO3 max Brake current Allowable power dissipation V -0.3 to +6.0 V 6.4 A Pulse current: 10ms 8 A Pulse current: 16μs 24 A IOB max VDD=5.0V, square wave current, operating time 15ms (single pulse, low side brake) 12 A PdPK max No heat sink 2.8 W Operating substrate temperature Tc Metal surface temperature of the package -20 to +105 °C Junction temperature Tj max 150 °C Storage temperature Tstg -40 to +125 °C Allowable Operating Ranges at Ta=25°C Parameter Symbol Operating supply voltage VCC Input voltage VIN Output current 1 IO1 Output current 2 Brake current Conditions Ratings With signals applied unit 18 to 29 V 0 to 5.5 V DC current, Tc=80°C 4.6 A IO2 DC current, Tc=105°C 3.8 A IOB Square wave current, operating time 2ms, 12 A Low side brake,Tc=105°C Refer to the graph for each conduction-period tolerance range for the output current and brake current. Electrical Characteristics at Tc=25°C, VCC=24V Parameter Symbol Conditions min typ max unit VCC supply current ICCO ENABLE=GND, IN1=IN2=3.3V 9.3 11 FET diode forward voltage Vdf If=1A (RL=23Ω) 0.76 1.4 V Output saturation voltage 1 Vsat1 RL=23Ω, F1, F2 140 200 mV Output saturation voltage 2 Vsat2 RL=23Ω, F3, F4 50 85 mV Output leak current IOL F1, F2, F3, and F4 OFF operation 50 μA Input high voltage VIH IN1, IN2, ENABLE pins Input low voltage VIL IN1, IN2, ENABLE pins High-level input current IILH IN1, IN2, ENABLE pins, VIH=3.3V Low-Level Input current IILL IN1, IN2, ENABLE pins, VIL=GND Overcurrent detection voltage VOC Between pins Vref1 and S.P Internal PWM frequency fc Overheat detection temperature TSD 2.5 V 33 0.8 V 50 μA 10 μA 0.48 32 Design guarantee mA 46 144 V 62 kHz °C Note: A fixed-voltage power supply must be used. No.A1929-2/14 STK681-352-E Package Dimensions unit:mm (typ) 24.2 (18.4) 4.5 14.4 11.0 14.4 (11.0) (R1.47) 19 (3.5) 1 1.0 0.4 0.5 2.0 18 1.0=18.0 4.0 4.45 Derating Curve of Motor Current, IO, vs. STK681-352-E Operating Board Temperature, Tc IO - Tc 7 DC Motor current, IO - A 6 PWM(VCC=24V) 5 4 3 2 1 0 0 10 20 30 40 50 60 70 80 90 100 110 Operating Substrate Temperature, Tc- °C (The maximum PWM frequency is 50kHz.) The PWM frequencies in the above graph indicate the ENABLE signal. The same PWM IO derating curves as those shown above will be obtained when the internal PWM frequency of the STK681-352-E is used. Increasing the VCC supply voltage narrows the IO derating curve range, so IO should be set in reference to the above graph. 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. The Tc temperature should be checked in the center of the metal surface of the product package. No.A1929-3/14 STK681-352-E STK681-352-E Allowable Brake Current Range (Low side: F3, F4=ON) IOB - t 13 Brake current, IOB - A 12 11 Tc=25°C 10 9 8 70°C 80°C 90°C 7 6 5 1.0 105°C 2 3 5 7 10 2 3 5 7 100 2 3 5 7 1000 Conduction time, t - ms STK681-352-E Allowable Brake Current Range (High side: F1, F2=ON) or Allowable Startup Current Range IO - t 9 Single-pulse current, IO - A 8 7 Tc=25°C 6 90°C 80°C 5 70°C 4 105°C 3 2 1.0 2 3 5 7 10 2 3 5 7 100 2 3 5 7 1000 Conduction time, t - ms No.A1929-4/14 STK681-352-E Internal Block Diagram 5 11 12 15 IN2 VCC OUT1 Unassigned pins 8 10 7 OUT2 9 4 6 F1 F2 F3 F4 17 IN1 16 ENABLE 18 GND 1 2 VCC 3 Power supply for Logic Output short-circuit detection VDD Overheat Detection FAULT Latch 13 Overcurrent Detection Vref 19 PWM (46kHz typ) Constantcurrent control Setting voltage (0.48V typ) S.GND 14 No.A1929-5/14 STK681-352-E Sample Application Circuit STK681-352-E 9 FAULT 13 3.3V N.C 15 IN1 16 IN2 17 ENABLE (DC or PWM) 10 OUT1 8 CCW 18 R1 12 N.C 11 N.C 4 R2 C1 47μF to /50V 3 C3 0.1μF CW N.C 5 19 Motor OUT2 6 Vref C2 10μF/50V VCC=24V 7 2 GND Rs 1 14 S.GND Motor Drive Conditions (H: High-level input; L: Low-Level Input) Stop IN1 IN2 ENABLE H L L Turns the power supply OFF. Remarks ENABLE must be set Low when VCC is rising or falling. L H L H H L Forward (CW) H L H Reverse (CCW) L H H Brake L L L or H VCC side Brake MOSFET ON H H H GND side Brake MOSFET ON No input signal is needed that turns off the upper- and lower-side drive devices when switching the rotational direction. * Output control is enabled by applying an external PWM signal to the ENABLE pin. The product can run at a minimum external PWM pulse width of 1μs. In the case when the high pulse width is less than 16μs, however, the IC may fail to detect a short-circuit condition when an output short-circuit occurs. FAULT signal is generated to indicate an error condition if VCC falls below the allowable operating range when the ENABLE pin is set to high during motor rotation or PWM operation. For this reason, ENABLE must be set to low when VCC is rising or falling. When both IN1 and IN2 are set low, the MOSFET on the VCC side is driven. To minimize the loss when stopped, set IN1 = IN2 = High and ENABLE = Low to turn off the gate signal to the VCC side MOSFETs. Setting the current limit using the Vref pin Peak output current (Iop) = (Vref ÷ 4.9) ÷ Rs “4.9” in the above formula indicates the portion of the Vref voltage that is divided using the circuit inside the control IC. Vref = (R2 ÷ (R1 + R2)) × 3.3V Rs is the external current detection resistance value of the HIC, and Vref ≤ 2.0V must be satisfied so that overcurrent detection is not triggered. No.A1929-6/14 STK681-352-E 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) Chopping operations based on F3 and F4 are used for current control. The timing given below is used for OUT1 or OUT2 voltage output and for F3 or F4 drain current. (3) Do not connect the N.C pins (5, 11, 12 and 15 pin) shown in the internal block diagram or sample application circuit to a circuit pattern on the PCB. OUT1 or OUT2 Output voltage VCC+Vdf GND IO peak (current setting value) F3 or F4 Drain current 0A 22μF IO peak (current setting value) Motor current 0A (4) Sample Timing Diagram IN1 IN2 ENABLE Stop Forward rotation Brake Reverse rotation Stop Forward rotation Brake Stop (5) If the current detection resistor, Rs, connected to pin1, pin2, and pin3 is short-circuited, the overcurrent detection circuit does not operate. If the output pin is short-circuited directly to VCC or connected directly to GND, an output short-circuit condition is detected and the output is latched in the off state. To restart the operation, turn on VDD again. (6) 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. No.A1929-7/14 STK681-352-E I/O Functions of Each Pin Pin Name Pin No. Function Input pin for turning F2 and F4 ON and OFF IN1 16 IN2 17 ENABLE 18 ENABLE must be set Low when VDD is rising and falling. ENABLE must be set High to drive the motor. FAULT 13 activated. When the detector is activated, this pin is set low and all of F1, F2, F3 and F4 in the final stage are OUT1 8, 10 OUT2 4, 6 At low level F2: ON and F4: OFF; at high level, F2: OFF and F4: ON Input pin for turning F1 and F3 ON and OFF At low level F1: ON and F3: OFF; at high level, F1: OFF and F3: ON Pin for turning F3 and F4 ON; At high level F3 and F4: ON Monitor pin used when either of the output short-circuit detector, overcurrent detector, or overheat detector is latched off. This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. This pin limits the peak current when motor startup. The current setting voltage, Vref, is set to the value of 4.9 times the voltage drop of the external current detection Vref 19 GND 1, 2, 3 Power system ground S.GND 14 Control system ground VCC 7, 9 Motor system supply voltage resistor. The internal overcurrent detection level is 0.48V, so setting Vref < 2.0V is recommended. No.A1929-8/14 STK681-352-E Technical Information 1. Configuration of each pins <Configuration of the IN1, IN2, and ENABLE input pins> Input pins: 16, 17, 18 pin 5V 10kΩ 100kΩ VSS The input pins of this driver all use Schmitt input. Typical specifications at Tc = 25°C are given below. Hysteresis voltage is 0.3V (VIHa-VILa). When rising When falling 1.8V typ 1.5V typ Input voltage VIHa VILa Input voltage specifications are as follows. VIH = 2.5V min VIL = 0.8V max <Configuration of the FAULT input pin> Output pin 5V Pin 13 VSS No.A1929-9/14 STK681-352-E <Configuration of the Vref input pin> To 1, 2, 3 pins VDD=5V Vref/4.9 Pin 19 PWM control To MOSFET gate Amplifier VSS [VCC Reduced voltage detection] The internal control IC of the driver has a function that detects reduced voltage when VCC is supplied, to prevent insufficient internal P-channel MOSFET gate voltage. The reduced voltage detection level is set to VCC = 15V (typ.). 15V VCC MOSFET off MOSFET off When VCC < 15V, an internal control voltage has not risen above the preset threshold level, so ENABLE must be set to low in order to turn off the MOSFET. No.A1929-10/14 STK681-352-E 2. Output short-circuit detection, Overcurrent Detection and Overheat Detection Each detection function operates using a latch system and turns output off. To restore output operation, turn the VDD power supply off and then on again to apply a power-on reset. [Output Short-circuit Detection, Overcurrent Detection] When the output pin is simply connected to the circuit GND or VCC, or when the output load is short-circuited, the output short circuit detector must be activated and turn the output off. Constant current PWM control can be performed by connecting a current detection resistor to pins 1, 2 and 3, and setting the Vref pin voltage to less than 2.0V. In addition, when this current detection resistor voltage exceeds 0.48V (typ.), the overcurrent detector is activated and shuts the output off. [Overheat Detection] Rather than directly detecting the temperature of the semiconductor device, overheat detection detects the temperature of the aluminum substrate (144°C typ). Within the allowed operating range of IO1 (4.6A) recommended in the specifications, if a heat sink attached for the purpose of reducing the operating substrate temperature, Tc, comes loose, the semiconductor can operate without breaking. However, we cannot guarantee operations without breaking in the case of operation other than those recommended, such as operations at a current exceeding IOH max (4.6A) that occurs before overcurrent detection is activated. 3. Mitigated Curve of Package Power Loss, PdPK, vs. Ambient Temperature, Ta Package power loss, PdPK, refers to the average internal power loss, PdAV, allowable without a heat sink. The figure below represents the allowable power loss, PdPK, vs. fluctuations in the ambient temperature, Ta. Power loss of up to 2.8W is allowable at Ta=25°C, and of up to 1.5W at Ta=60°C. Allowable power dissipation, PdPK (no heat sink) - Ambient temperature, Ta PdPK - Ta Allowable power dissipation, PdPK - W 3.0 2.5 2.0 1.5 1.0 0.5 0 0 20 40 60 80 100 120 Ambient Temperature, Ta- °C No.A1929-11/14 STK681-352-E 4. Data Vsat1, Vsat2 - IO Output saturation voltage, Vsat1, Vsat2 - mV 2600 Tc=25°C 2400 2200 2000 1800 1600 1400 1200 at 1 Vs 1000 ) °C 05 800 (1 at1 Vs C) (105° Vsat2 Vsat2 600 400 200 0 0 1 2 3 4 5 6 7 8 7 8 Output current, IO - A (DC) Vdf - IO 1.00 Tc=25°C Diode forward voltage, Vdf - V 0.95 gh (Hi Vdf 0.90 0.85 ) side 0.80 0.75 Vdf (L 0.70 ) ow side 0.65 0.60 0.55 0.50 0.45 0.40 0 1 2 3 4 5 6 Output current, IO - A (DC) No.A1929-12/14 STK681-352-E 5. Other Notes on Use In addition to the “Notes” indicated in the Sample Application Circuit, care should also be given to the following contents during use. (1) Allowable operating range Operation of this product assumes use within the allowable operating range. If a supply voltage or an input voltage outside the allowable operating range is applied, an overvoltage may damage the internal control IC or the MOSFET. If a voltage application mode that exceeds the allowable operating range is anticipated, connect a fuse or take other measures to cut off power supply to the product. (2) Input pins If the input pins are connected directly to the PC board connectors, electrostatic discharge or other overvoltage outside the specified range may be applied from the connectors and may damage the product. Current generated by this overvoltage can be suppressed to effectively prevent damage by inserting 100Ω to 1kΩ resistors in lines connected to the input pins. Take measures such as inserting resistors in lines connected to the input pins. (3) Input Signal Lines 1) Do not use an IC socket to mount the driver, and instead solder the driver directly to the PC board to minimize fluctuations in the GND potential due to the influence of the resistance component and inductance component of the GND pattern wiring. 2) To reduce noise due to electromagnetic induction to small signal lines, do not design small signal lines (sensor signals, 5V or 3.3V power supply signal lines) that run parallel near the motor output lines OUT1 and OUT2. 3) Pins 5, 11, 12 and 15 of this product are N.C pins. Do not connect any wiring to these pins. (4) When mounting multiple drivers on a single PC board When mounting multiple drivers on a single PC board, the GND design should mount a VCC decoupling capacitor, C1, for each driver to stabilize the GND potential of the other drivers. The key wiring points are as follows. 24V 3.3V 79 16 Input Signals 17 79 Motor 1 IC1 18 16 Input Signals C1 for IC1 1 2 19 143 17 79 Motor 2 IC2 18 16 Input Signals C1 for IC2 1 2 19 143 GND 17 Motor 3 IC3 18 C1 for IC3 1 2 19 143 GND Short Thick and short Thick No.A1929-13/14 STK681-352-E SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of July, 2011. Specifications and information herein are subject to change without notice. PS No.A1929-14/14