STK681-332-E STK681-352-E www.onsemi.com Intelligent Power Module DC Brush Motor Driver Application Note Overview The STK681-332-E and STK681-352-E are IPM (Intelligent Power Module) for use in current control forward/reverse DC motor driver with brush. Features • • • • Allows forward, reverse, and brake operations in accordance with the external input signal. 12A peak startup output current and 12A peak brake output current. On-chip output short-circuits detection function. Connecting an external current detection resistor allows overcurrent detection and peak current control in the PWM operation mode. • 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. Applications • Office photocopiers, printers, etc. Selection Guide Parameter STK681-332-E STK681-352-E Operating supply voltage 1 VCC 10 to 38V 18 to 29V Operating supply voltage 2 VDD 5V±5% No need 5A 3.8A 12A 12A Output current (Tc=105°C) Brake current © Semiconductor Components Industries, LLC, 2014 November 2014 - Rev. 1 1 Publication Order Number : ANDSTK681332E352E/D STK681-332-E/352-E Application Note Package Dimensions STK681-332-E STK681-352-E unit : mm (typ) SIP19 24.2x14.4 CASE 127BA ISSUE O 24.2 (18.4) 4.5 14.4 11 14.4 (11) ( 2−R 1.47) 19 (3.5) 1 1 0.4 0.5 0.05 18×1=18 2 0.35 Recommend hole size for Lead Frame on PCB; 0.9 mm (max) 0.4 +0.2 0.05 0.5 +0.05 0.05 0.9 (0.814 to 0.570) Lead Frame www.onsemi.com 2 4 4.45 STK681-332-E/352-E Application Note Pin Assignment STK681-332-E 1 GND 2 GND 3 OUT2 4 N.C 5 OUT2 6 VCC 7 OUT1 8 VCC 9 OUT1 10 N.C 11 N.C 12 FAULT 13 S.GND 14 VDD 15 IN1 16 IN2 17 ENABLE 18 Vref 19 STK681-332 STK681-332 GND www.onsemi.com 3 STK681-332-E/352-E Application Note STK681-352-E 1 GND 2 GND 3 OUT2 4 N.C 5 OUT2 6 VCC 7 OUT1 8 VCC 9 OUT1 10 N.C 11 N.C 12 FAULT 13 S.GND 14 N.C 15 IN1 16 IN2 17 ENABLE 18 Vref 19 STK681-332 STK681-352 GND www.onsemi.com 4 STK681-332-E/352-E Application Note Block Diagram STK681-332-E 5 11 VCC OUT1 N.C 12 IN2 8 10 7 9 OUT2 4 6 F1 F2 F3 F4 17 IN1 16 ENABLE 18 GND 1 2 3 Output Short-circuit detection VDD(5V) 15 FAULT Latch 13 Overcurrent detection Vref 19 Overheat detection PWM (46kHz typ) Constant current control Setting voltage (0.48V typ) S.GND 14 www.onsemi.com 5 STK681-332-E/352-E Application Note STK681-352-E 5 VCC OUT1 N.C 12 11 15 IN2 8 10 7 9 OUT2 4 6 F1 F2 F3 F4 17 IN1 16 ENABLE 18 GND 1 VCC 2 3 Power supply for Logic Output Short-circuit detection VDD FAULT Latch 13 Overcurrent detection Vref 19 Overheat detection PWM (46kHz typ) Constant current control Setting voltage (0.48V typ) S.GND 14 www.onsemi.com 6 STK681-332-E/352-E Application Note Specifications Absolute Maximum Ratings at Tc=25°C Parameter Ratings Symbol Condition Maximum supply voltage 1 Maximum supply voltage 2 Input voltage VCC max VDD=0V VDD max No signal VIN max Output current1 Io1max Output current2 Io2max Logic input pins VDD=5.0V, DC current VDD=5.0V, Pulse current: 5ms Pulse current: 10ms VDD=5.0V, square wave current, operating time 15ms (single pulse, low side brake) Brake current Allowable power dissipation Operating substrate temperature Junction temperature Storage temperature IoBmax PdPKmax No heat sink Tc Metal surface temperature of the package STK681-332 STK681-352 52 38 unit V 0.3 to 6.0 V 0.3 to 6.0 V 8.5 6.4 A 12 - A - 8 A 12 12 A Tjmax Tstg 2.8 W 20 to +105 °C 150 40 to +125 °C °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Allowable Operating Ratings at Ta=25°C Parameter Operating supply voltage 1-1 Operating supply voltage 1-2 Operating supply voltage 2 Input voltage Symbol VCC-1 VCC-2 VDD Ratings Condition STK681-332 With signals applied(Tc=105°C) With signals applied(Tc=90°C) With signals applied 10 to 38 Io1 Output current 2 Io2 Brake current IoB unit V 18 to 29 10 to 42 VIN Output current 1 STK681-352 VDD=5.0V, DC current, Tc=80°C VDD=5.0V, DC current, Tc=105°C VDD=5.0V, square wave current, operating time 2ms, Low side brake, Tc=105°C V 5.0±5% - V 0 to VDD 0 to 5.5 V 6.1 4.6 A 5 3.8 A 12 12 A Refer to the graph for each conduction-period tolerance range for the output current and brake current. Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. www.onsemi.com 7 STK681-332-E/352-E Application Note Electrical Characteristics at Tc=25°C, VCC=24V, VDD=5.0V Parameter Symbol Conditions VDD supply current(STK681-332-E) Icco Forward or reverse operation VCC supply current(STK681-352-E) Icco ENABLE=GND, IN1=IN2=3.3V FET diode forward voltage (STK681-332-E) FET diode forward voltage (STK681-352-E) Output saturation voltage 1 (STK681-332-E) Output saturation voltage 1 (STK681-352-E) Vdf Vsat1 Ratings min unit typ max 6 9 mA 9.3 11 mA 0.75 1.4 V 0.76 1.4 V 65 100 mV 140 200 mV 50 85 mV 50 μA If=1A(RL=23Ω) RL=23Ω, F1, F2 Output saturation voltage 2 Vsat2 RL=23Ω, F3, F4 Output leak current IOL F1, F2, F3, and F4 OFF operation Input high voltage VIH IN1, IN2, ENABLE pins Input low voltage VIL IN1, IN2, ENABLE pins 2.5 V 0.8 V High level input current IILH (STK681-332-E) IN1, IN2, ENABLE pins, VIH=5V 50 75 μA High level input current IILH (STK681-352-E) IN1, IN2, ENABLE pins, VIH=3.3V 33 50 μA Low level input current IILL IN1, IN2, ENABLE pins, VIL=GND 10 μA Overcurrent detection voltage VOC Between pins Vref1 and S.P Internal PWM frequency fc 0.48 32 Overheat detection temperature TSD Design guarantee Notes : A fixed-voltage power supply must be used. 46 144 V 62 kHz °C Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. www.onsemi.com 8 STK681-332-E/352-E Application Note 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 STK681-332-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 confirms these values using an actual set. The Tc temperature should be checked in the center of the metal surface of the product package. Tc=25°C Tc=70°C Tc=80°C Tc=90°C Tc=105°C www.onsemi.com 9 STK681-332-E/352-E Application Note Tc=25°C Tc=70°C Tc=80°C Tc=90°C Tc=105°C www.onsemi.com 10 STK681-332-E/352-E Application Note 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 confirms these values using an actual set. The Tc temperature should be checked in the center of the metal surface of the product package. Tc=25°C Tc=70°C Tc=80°C Tc=90°C Tc=105°C www.onsemi.com 11 STK681-332-E/352-E Application Note Tc=25°C Tc=70°C Tc=80°C Tc=90°C Tc=105°C www.onsemi.com 12 STK681-332-E/352-E Application Note STK681-332-E Vdf-Io Output saturation voltage, Vsat1, Vsat2 - mV Output current Io A STK681-332-E Vsat1, Vsat2-Io Output current Io A www.onsemi.com 13 STK681-332-E/352-E Application Note FET diode forward voltage, Vdf - V STK681-352-E Vdf-Io Output current Io A Output saturation voltage, Vsat1, Vsat2 - mV STK681-352-E Vsat1, Vsat2-Io Output current Io A www.onsemi.com 14 STK681-332-E/352-E Application Note Pin Functions Pin Name Pin No. IN1 16 IN2 ENABLE FAULT 17 18 13 Pin Function Input pin for turning F2 and F4 ON and OFF 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 Equivalent circuit VDD 10kΩ Pin for turning F3 and F4 ON; At high level F31 and F42: ON ENABLE must be set Low when VDD is rising and falling. ENABLE must be set High to drive the motor. 100kΩ GND Monitor pin used when either of the output short-circuit detector, overcurrent detector, or overheat detector is activated. When the detector is activated, this pin is set low and all of F1, F2, F3 and F4 in the final stage are latched off. VDD GND OUT1 OUT2 8, 10 4, 6 This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. 8 10 7 9 4 6 F2 F1 This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2. F3 F4 1 2 3 GND VDD(5.0V) Vref GND S.GND Vcc VDD N.C 19 1, 2, 3 14 7, 9 15 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 resistor. The internal overcurrent detection level is 0.48V, so setting Vref < 2.0V is recommended. Power system ground Control system ground Motor system supply voltage Control system supply voltage N.C www.onsemi.com 15 19 GND STK681-332-E STK681-352-E STK681-332-E/352-E Application Note Description of operation Input pins <IN1: pin 16, IN2: pin 17, ENABLE: pin 18> 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 Input voltage 1.5V typ VILa VIHa Thus, the input voltage level must be considered as; VIH=2.5Vmin VIL=0.8Vmax <Vref: pin 19> To pins 1,2,3 VDD Vref/4.9 PWM control Pin 19 Amplifier VSS www.onsemi.com 16 To MOSFET STK681-332-E/352-E Application Note Reduced voltage detection STK681-332-E (1) VDD The internal control IC of the driver has a function that detects reduced voltage when VDD is supplied. This reduced voltage threshold level is set to 4V (typ.), and the MOSFET gate voltage specification is 5V ±5%. So, a current flow through the output when VDD is rising results in the power stress to the MOSFET due to insufficient gate voltage. To prevent this power stress, set ENABLE = Low when VDD < 4.75V, which is outside the normal operating supply voltage range of the MOSFET. Control IC power (VDD) rising edge 4Vtyp 3.8Vtyp Control IC power on reset ENABLE signal input VDD, ENABLE Signals Input Timing (2) VCC 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 = 8.8V(typ.). 8.8V VCC MOSFET off MOSFET off www.onsemi.com 17 STK681-332-E/352-E Application Note STK681-352-E 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. 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 (6.1A:STK681-332-E, 4.6A:STK681-352-E) 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 (6.1A:STK681-332-E, 4.6A:STK681-352-E) that occurs before overcurrent detection is activated. www.onsemi.com 18 STK681-332-E/352-E Application Note Application Circuit Example (STK681-332-E) STK681-332-E FAULT 13 VDD(5V) 15 IN1 16 IN2 17 ENBALE (DC or PWM) 18 C2 10μ / 50V 10 OUT1 8 12 N.C 11 N.C 6 5 19 CCW Motor CW OUT2 N.C 4 R2 C3 0.1μF VCC=24V 7 R1 Vref 9 C1 47μF to / 50V 3 2 14 1 GND Rs S.GND Application Circuit Example (STK681-352-E) STK681-352-E FAULT 13 5V or 3.3V 15 IN1 16 IN2 17 ENBALE (DC or PWM) 18 C2 10 10μ / 50V OUT1 8 12 N.C 11 N.C 6 5 19 CCW Motor CW OUT2 N.C 4 R2 C3 0.1μF VCC=24V 7 R1 Vref 9 C1 47μF to / 50V 3 2 1 14 S.GND www.onsemi.com 19 Rs GND STK681-332-E/352-E Application Note Motor Drive Conditions (H: High-level input; L: Low-Level Input) IN1 H L H IN2 L H H Forward (CW) H L Reverse (CCW) L H H H L L Stop Brake ENABLE L L L H PWM H PWM H PWM L or H Out1 VCC Floating Floating VCC VCC GND PWM(F3) GND L-PWM(F3) VCC Out2 Floating VCC Floating GND PWM(F4) VCC VCC GND L-PWM(F4) VCC Notes Turns the power supply OFF. ENABLE must be set Low when VDD is rising or falling. No input signal is needed that turns off the upper- and lower-side drive devices when switching the rotational direction. GND side MOSFET ON Vcc side MOSFET ON STK681-332 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. If VDD is turned off in the condition with the ENABLE pin set to high during motor rotation or PWM operation, the FAULT signal is output when VDD is falling, indicating error condition. For this reason, ENABLE must be set to low when VDD 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. STK681-352 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 Output current peak(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))×5.0V(or 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. www.onsemi.com 20 STK681-332-E/352-E Application Note Sample Timing Diagram IN1 IN2 ENABLE Out1 Out2 DC (CW PW DC (Stop) (CCW PW (Brake) 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 pin) shown in the internal block diagram or sample application circuit to a circuit pattern on the PCB. (4) 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. (In case of STK681-352-E, to restart the operation, turn on VCC again.) (5) 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. OUT1 or OUT2 Output Voltage VCC + Vdf GND Io peak (current setting value) F3 or F4 Drain Current 0A 23μs Io peak (current setting value) Motor Current 0A www.onsemi.com 21 STK681-332-E/352-E Application Note Delay time VCC=24V, VDD=5.0V, Load:8Ω + 5mH, IN1 or IN2:1kHz/50% STK681-332-E,352-E Turn-on delay time Turn-off delay time IN 5V/div 1μs/div OUT 10V/div ENABLE Turn-on delay (Low side MOSFET turn on) ENABLE Turn-off delay (Low side MOSFET turn off) ENABLE 5V/div 200ns/div OUT 10V/div www.onsemi.com 22 STK681-332-E/352-E Application Note Substrate Specifications (Substrate recommended for operation of STK681-332/352-E) Size: 100mm × 65mm × 1.6mm 1-layer board Material: Phenol Copper side (35μ) Allowable power dissipation, PdPK - W Allowable power dissipation (Reference value) Allowable power dissipation, PdPK (no heat sink) - Ambient temperature, Ta 3 2.5 2 1.5 1 0.5 0 0 20 40 60 80 100 120 Ambient temperature, Ta - °C If you need heat sink to STK681-332 and 352, mount heat sink with something such as clips. www.onsemi.com 23 STK681-332-E/352-E Application Note Evaluation board STK681-332-E (100.0mm x 65.0mm x 1.6mm, phenol 1-layer board) www.onsemi.com 24 STK681-332-E/352-E Application Note Evaluation board STK681-352-E (100.0mm x 65.0mm x 1.6mm, phenol 1-layer board) DC brush motor www.onsemi.com 25 STK681-332-E/352-E Application Note Bill of Materials for STK681-332/352-E Evaluation Board Designator Quantity Description Value Tolerance Footprint Manufacturer Manufacturer Part Number 50ME47CA Substitution Allowed YES Lead Free YES C1 1 47μF /50V 20% SUN ERECTRONICS C2 1 10μF /50V 20% C3 1 0.1μF /50 V R1 1 R2 1 R3, R4 2 R5 1 HIC 1 VCC Bypass Capacitor VDD Bypass Capacitor Vref stabilization Capacitor Resistor to set Vref Resistor to set Vref Output current detective resistor Pull-up Resistor IPM SUN ERECTRONICS 50ME10CA YES YES 10% Panasonic ECQV1H104JL2 YES YES 1% AKAHANE ERECTRONICS AKAHANE ERECTRONICS KOA RN14S****FK YES YES RN14S****FK YES YES BPR38CFR10J YES YES AKAHANE ERECTRONICS ON Semiconductor Mac-Eight RN14S103JK YES YES STK681-332 NO YES JP1, JP2 2 JR-4 YES YES JP2 1 Mac-Eight JR-4 YES YES TP1 to TP11 11 Mac-Eight ST-1-3 YES YES 1% 0.1Ω 5% 10 kΩ 5% Jumper for STK681-332 Jumper for STK681-352 Test Point Notes: R1 and R2 are used to Vref for current setting. Therefore their value do not mention on this table. Evaluation Circuit FAULT DC motor VDD(5V) R5 IN1 IN2 ENABLE OUT2 OUT1 + Vref C2 R1 R2 VCC C3 JP1 R3 + C1 JP2 GND(PG) 8 7 6 5 4 3 2 1 VCC OUT2 N.C OUT2 GND GND GND VCC OUT1 N.C N.C FAULT S.GND VDD IN1 IN2 ENABLE Vref 19 18 17 16 15 14 13 12 11 10 9 OUT1 R4 STK681-332-E(352-E) Notes: Open JP1 with STK681-352-E. www.onsemi.com 26 GND(SG) STK681-332-E/352-E Application Note Waveform example STK681-332(Current limit 5A setting) IN1 and IN2; 5V/div, Output current; 5A/div IN1 IN2 OUT2 Output current Positive direction is source current. Peak 8.5A FORWARD BRAKING STK681-332(Current limit 5A setting) IN1 5V/div, OUT2 20V/div, Output current; 5A/div IN1 OUT2 OUT2 Output current Positive direction is source current. Current limit active. Output is chopped. FORWARD Current control is slow decay. www.onsemi.com 27 STK681-332-E/352-E Application Note STK681-332 and 352 control MOSFET at Low side by constant-current PWM control system. Current control enters Slow decay mode. STK681-332 and 352 have ENABLE terminal built-in, which controls motor rotation. At the point of ENABLE=High, F3 or F4 at Low side turns on. STK681-332, 352(ENABLE: 20kHz) ENABLE ; 5V/div, OUT1 ; 20V/div, Output current; 0.5A/div ENABLE High duty 60% OUT1 Output current www.onsemi.com 28 STK681-332-E/352-E Application Note Evaluation Board Manual [Supply Voltage] VCC (10 to 38V: STK681-332-E): Power Supply for stepping motor VCC (10 to 29V: STK681-352-E): Power Supply for stepping motor Vref (0 to 2.0V): Const. Current Control for Reference Voltage VDD (5V) : Power Supply for internal logic IC [Operation Guide] 1. Motor Connection: Connect the motor to OUT1 and OUT2. 2. Initial Condition Setting: Set to signal condition IN1=H, IN2=H, and ENABLE=L. 3. Power Supply: <STK681-332-E> At first, supply DC voltage to VDD (5.0V), and VREF. Next, supply DC voltage to VCC. <STK681-352-E> At first, supply DC voltage to VDD (3.3V or 5.0V), and VREF. Next, supply DC voltage to VCC. 4. Set to Forward or Reverse signal condition with ENABLE=Low. Turn “High” ENABLE signal. Output current flows between OUT1 and OUT2. 5. Motor Operation [Setting the current limit using the Vref pin] Output current peak(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))×5.0V(or 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. www.onsemi.com 29 STK681-332-E/352-E Application Note Notes in design (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) Power connectors (STK681-332-E) If the motor power supply VCC is applied by mistake without connecting the GND part of the power connector when the product is operated, such as for test purposes, an overcurrent flows through the VCC decoupling capacitor, C1, to the parasitic diode between the VDD of the internal control IC and GND, and may damage the power supply pin block of the internal control IC. Always connect the GND pin before supplying VCC. 5V Reg. 15 8 Logic level Control Block 10 9 7 4 6 VDD F1 IN1 F2 IN2 VCC ENABLE 24V Reg. C1 F3 FAULT F4 Vref 1 14 S.GND 2 VSS 3 open Over-current path (4) 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 and 12 of this product are N.C pins. Do not connect any wiring to these pins. www.onsemi.com 30 STK681-332-E/352-E Application Note (5) 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. STK681-332-E 24V 5V Input Signals 15 7 9 16 17 IC1 Motor 1 18 15 7 9 16 Input Signals C1 for IC1 1 2 19 143 17 18 15 7 9 16 Motor 2 IC2 Input Signals C1 for IC2 1 2 19 143 17 18 Motor 3 IC3 C1 for IC3 1 2 19 143 GND GND Short Thick and short Thick STK681-352-E 24V 5V 79 Input Signals 16 17 IC1 18 1 2 19 143 Motor 1 16 Input Signals C1 for IC1 79 17 18 16 Motor 2 IC2 Input Signals C1 for IC2 1 2 19 143 79 Motor 3 17 18 IC3 1 2 19 143 C1 for IC3 GND GND Short Thick and short Thick www.onsemi.com 31 STK681-332-E/352-E Application Note ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf . SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. www.onsemi.com 32