LV8860V Bi-CMOS IC Single-Phase FAN Motor Driver Application Note http://onsemi.com Overview LV8860V is a driver IC used for single-phase fan motor. High-efficiency and low-noise are realized by reducing reactive power using Silent PWM. The operating range of LV8860V is wide. LV8860V also corresponds to 24V. Therefore, it is optimal for office automation equipment and factory automation equipment. Function Single-phase full wave operation by Silent PWM drive Speed is controllable by PWM input Hall bias output pin Integrated Quick Start Circuit FG (rotation detection)/ RD (lock detection) output pin (open drain output) Integrated current limiter circuit (limit at Io=450mA with RL=0.5Ω connection, limit value is determined based on Rf.) Integrated lock protector circuit and automatic recovery circuit Integrated thermal shut-down (TSD) circuit Typical Applications Cooling fan for office automation equipment and factory automation equipment and projector. Pin Assignment Package Dimensions (Top view) Recommendation Soldering Footprint Caution: The package dimension is a reference value, which is not a guaranteed value Reference Symbol eE e b3 I1 Semiconductor Components Industries, LLC, 2013 December, 2013 (Unit: mm) SSOP30(225mil) 5.80 0.65 0.32 1.00 1/27 LV8860V Application Note Block Diagram 2/27 LV8860V Application Note Specifications Absolute maximum rating at Ta=25C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 36 V OUT pin output current IOUT max 0.7 A RD/FG output pin withstand VRD/FG max 36 V RD/FG output maximum current IRD/FG max 10 mA IRGL max 5 mA IHB max 10 mA VPWM max 6 V 0.8 W RGL output maximum current HB output maximum current PWM input pin withstand Allowable power dissipation Pd max *On a specified board Operating temperature Topr -40 to +95 °C Storage temperature Tstg -55 to +150 °C *Specified board: 114.3mm×76.1mm×1.6mm, fiberglass epoxy printed circuit board Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. 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. Recommended Operating Conditions at Ta 25C Symbol Operating supply voltage range VCC op1 Recommended supply voltage range 7 34 V VCC op2 Boot guarantee supply voltage range 6 34 V VICM 0.3 VRGL-2.0 V SSW pin input voltage range SSW 1 3.0 V Input PWM frequency range PWMF 20 50 kHz Hall input common phase input Conditions Ratings Parameter min typ Unit max voltage range 3/27 LV8860V Application Note Electrical Characteristics at Ta=25°C, VCC=24V Parameter Circuit consumption current Symbol Ratings Conditions min typ Unit max ICC Active 2.2 3.5 mA ICCo Stand-by 1.7 2.7 mA RGL pin output voltage VRGL 4.7 5.0 5.3 V RGH pin output voltage VRGH VCC-4.3 VCC-4.8 VCC-5.3 V 1.16 1.25 1.28 V 1.4 2.0 Ω 1.0 uA 225 250 mV 1.0 V HB pin output voltage VHB IHB=5mA Output ON resistance Ron Io=0.3A, upper and lower ON resistance Hall input bias current IHIN Current limiter VRF PWM pin input Low level PWM pin input High level PWM input minimum pulse width RD/FG output pin Low voltage FG output leakage current FG comparator hysteresis width Output ON time in Lock-detection VPWML 0 VPWMH 2.5 TPWM IRD/FG=3mA IRDL/FGL VRD/FG=24V ∆VHYS including offset TACT TDET Output ON/OFF ratio in Lock-detection TRTO Thermal shutdown hysteresis width VRGL 2 VRD/FG Output OFF time in Lock-detection Thermal shutdown operating temperature 200 TRTO=TDET/TACT V uSec 0.22 0.30 V 10 uA ±5 ±12 ±18 mV 0.74 0.95 1.16 Sec 7.0 9.0 11.0 Sec 7.5 9.0 11.0 TSD *Design guarantee 180 °C ∆TSD *Design guarantee 40 °C * Design guarantee value and no measurement were performed. 4/27 2.5 5 2 4.8 VRGL (V) ICC (mA) LV8860V Application Note 1.5 1 4.6 4.4 VCC = 24V 4.2 0.5 ICC_active 0 6 12 ICC_stand‐by 18 24 IRGL = 5mA 4 ‐40 30 VCC (V) Figure 1 Curcuit consumption current vs Supply voltage 40 60 80 VCC = 24V 1.5 IHB = 5mA 1.3 Ron (Ω) VHB (V) 20 2 1.4 1.2 1.1 1 VCC = 24V 0.5 OUT1P+OUT2N 0 1 ‐40 ‐20 0 20 40 60 80 0.1 Temperature (℃) Figure 3 HB pin output voltage vs Temperature 0.2 0.3 OUT2P+OUT1N 0.4 0.5 0.6 0.7 Iout (A) Figure 4 Output on resistance vs Output current 700 2 IIN1, IIN2 (nA) 1.5 1 0.5 OUT1P+OUT2N 0 ‐40 ‐20 0 20 OUT2P+OUT1N 40 60 600 VCC = 24V 500 VIN = 0.3V 400 300 200 100 IIN1 IIN2 0 ‐40 80 ‐20 0 20 40 60 80 Temperature (℃) Figure 6 Hall input vias current vs Temperature Temperature (℃) Figure 5 Output on resistance vs Temperature 2 0.3 1.8 0.28 1.6 0.26 VRF (V) VPWM threshold (V) 0 Temperature (℃) Figure 2 RGL pin output voltage vs Temperature 1.5 Ron (Ω) ‐20 1.4 1.2 0.24 0.22 1 0.2 ‐40 ‐20 0 20 40 60 80 Temperature (℃) Figure 7 PWM input threshold voltage vs Temperature ‐40 ‐20 0 20 40 60 80 Temperature (℃) Figure 8 Current limitter voltage vs Temperature 5/27 140 140 120 120 VINp-pt (mV) VINp-p (mV) LV8860V Application Note 100 80 60 40 100 80 60 40 20 20 0 0 1 1.5 2 2.5 ‐40 3 1.5 30 1.2 25 ⊿VHYS (mV) VFGsat, VRDsat (V) Figure 9 Voltage difference of IN1 and IN2 making Soft‐SW width vs SSW voltage 0.6 0.3 VFG VRD 0 ‐20 0 VSSW=2V 20 40 VSSW=3V 60 80 Temperature (℃) Figure 10 Voltage difference of IN1 and IN2 making Soft‐SW width vs Temperature VSSW (V) 0.9 VSSW=1V 20 15 10 5 0 ‐40 ‐20 0 20 40 60 80 Temperature (℃) Figure 11 RD/FG output pin low voltage vs Temperature ‐40 ‐20 0 20 40 60 80 Temperature (℃) Figure 12 FG comparator hysteresis width vs Temperature 6/27 LV8860V Application Note Pin Functions *On circuit board, Pin No. Pin name 1 OUT1 means VCC , means RGL. Description Equivalent circuit Output pin for motor driver The motor coil is connected between OUT1 (pin1) and OUT2 (16pin). 16 OUT2 2 NC NC pin 3 NC NC pin 4 VCC Power supply pin VCC voltage is impressed. The operation voltage range is from 7.0 to 34.0(V). The capacitor is connected to GND pin (14pin) for stabilization. 5 RGH Regulator voltage output pin for the upper output Tr driver The capacitor is connected to VCC pin (3pin) for stabilization. 6 PWM Input pin for PWM control The PWM signal is supplied for speed control. *OPEN: pull up to High * When input is High output is High When input is Low output is Low 7 FG FG(rotation detection) pulse output pin The resistor is connected to VCC pin (3pin) for detection signal. 8 RD RD(lock detection) signal output pin *During rotation output is Low During lock output is High The resistor is connected to VCC pin (3pin) for detection signal. Continued on next page. 7/27 LV8860V Application Note Continued from preceding page. Pin No. Pin name 9 IN1 Description Equivalent circuit Hall input + pin Hall input - pin The Hall device outputs are connected. If hall signal is affected by noise, the capacitor should be connected 11 IN2 between IN1 pin (9pin) and IN2 pin (11pin). 10 HB Hall bias output pin The voltage supply pin of Hall device is connected. 12 RGL Regulator voltage output pin for internal circuit and lower output Tr driver The capacitor is connected to GND pin (14pin) for stabilization. 13 SSW Voltage input pin for control between soft switches The resistor is connected to for RGL or GND pin (14pin) for adjusting soft switch width. *OPEN: pin voltage is 2V *Soft switch zone is changed by connecting a resistance to RGL or GND to adjust pin voltage. 14 GND 15 RF Ground pin Resistive connection pin for current limiter The resistor is connected to GND (14pin) for detection of current value. 8/27 LV8860V Application Note Operational Description 1. Operation Overview LV8860V is a driver with single phase full wave drive mode which outputs the voltage to a coil based on the position signal from a Hall device. By supplying power, the IC is turned on. As a result, the output voltage is impressed to the coil. FG signal is outputted according to phase switch of the coil, and RD signal is output when a motor is locked. LV8860V incorporates speed control function with direct PWM input method. The output mode is switched according to the signal input into a PWM pin and speed control is performed. When PWM input duty is 100% (DC input) or PWM pin is open, a fan rotates at full speed. Rotation speed is controllable because when a duty signal is input to PWM input, coil is energized by the same duty. When PWM input duty is 0% or the PWM pin is shorted to GND, IC is set to standby mode, where power supply to coil is stopped and a fan stops. Fig.13 Operation Waveform 9/27 LV8860V Application Note Input-Output Logic Operating state Rotation - drive mode Rotation – regeneration mode Stand-by mode Lock protector IN1 IN2 H L H L H L L - H - H L L H PWM H L L - OUT1 OUT2 FG RD H L L L H L L OFF L L L L L L L OFF OFF OFF L L OFF L L OFF L OFF OFF OFF Example Wave Form (VCC = 24, □80 single phase fan motor is used) Explanation of each wave VIN1, VIN2: input signal from Hall device VOUT1: output signal from OUT1 pin (1pin) VOUT2: output signal from OUT2 pin (16pin) VFG: output signal from FG pin (7pin), FG pin is pulled up with VCC pin IOUT: Coil Current VIN1 200mV/div VIN2 200mV/div VOUT1 20V/div VOUT2 20V/div VOUT1 20V/div VOUT2 20V/div VFG 20V/div IOUT 0.2A/div Fig.14OperationWaveform 10/27 LV8860V Application Note 1-1. Full-Speed drive When PWM pin is open or input PWM signal duty is 100%, the output of LV8860V is considered “full speed drive”. LV8860V has adopted a new soft-switching method, with which output waveform before and after the phase switch is obtained as shown in the following figure, where the duty changes gradually. LV8860V Full‐Speed 5ms/div LV8860V Full‐Speed 200us/div VOUT1 VOUT2 VOUT1 VOUT2 VFG VFG IOUT IOUT Fig.15Waveformoffullspeeddrive 11/27 LV8860V Application Note 1-2. Speed control by PWM input The rotation speed is controllable by PWM input into PWM pin (No.6pin). /PWM input voltage is “Low” => Drive OFF PWM input voltage is “High” => Drive ON /When PWM pin is open, IC drives Duty = 100%. /Input PWM frequency range is 20kHz – 50kHz, and Input PWM amplitude is 0V – 5V. Input PWM signal LV8860V Full‐Speed 5ms/div LV8860V Speed‐Control 5ms/div VOUT1 VOUT2 VOUT1 VOUT2 VFG VFG IOUT IOUT LV8860V Speed‐Control 20us/div VOUT1 VOUT2 VFG IOUT Fig.16Waveformofspeed‐controldrive 12/27 LV8860V Application Note 1-2-Appendix1. Description of synchronous rectification The synchronous rectification is one method for current regeneration in PWM speed control, which realizes high efficiency and low heat generation compared to the conventional diode rectification. The following figure explains operation of the output when synchronous rectification is performed. The alphabet at the left lower of each figure corresponds to figure 16 of the previous section. 1) When 2 transistors, Tr 1P and Tr2N are ON, coil current flows through the coil. At that time, output voltages are OUT1: Vcc – Vsat1P OUT2: 0V + I × Rf + Vsat2N 2) When PWM signal turns to Low, Tr 1P turns OFF to prevent penetration current. Coil current flows through the parasite Diode of Tr1N. At that time, output voltages are OUT1: 0V – VF (negative potential) OUT2: 0V + Vsat2N Returns to A 3) Next, Tr1N turns ON, Coil current flows through the Tr1N, coil, and Tr2N. (This method is “synchronous rectification”) At that time, output voltages are OUT1: 0V – Vsat1N (negative potential) OUT2: 0V + Vsat2N 4) When PWM signal turns to High, Tr1N turns OFF. Coil current flows through the parasite Diode of Tr1N. At that time, output voltages are OUT1: 0V – VF (negative potential) OUT2: 0V + Vsat2N 13/27 LV8860V Application Note 1-2-Appendix2.Merit of synchronous rectification compared to the conventional diode rectification. In this case, output voltages are OUT1: 0V – Vsat1N (negative potential) OUT2: 0V + Vsat2N In this case, output voltages are OUT1: 0V – VF (negative potential) OUT2: 0V + Vsat2N When the ON resistance of the transistor used for regeneration (Tr1N) is low and Vsat1N (Tr1N * regenerated current) is lower than VF of the diode used for diode regeneration, the power dissipation for regeneration is small. Hence, efficiency becomes high and low heat generation is realized. Example: Compare the power dissipation in Tr1N during regeneration where Iout = 0.3A, Ron = 0.5Ω, VF = 0.7V: Synchronous rectification Ptr1n = Iout × Vosat1N = 0.3 × (0.3 × 0.5) = 0.045(W) Diode regeneration Ptr1n = Iout × VF = 0.3 × 0.7 = 0.21(W) Heat generation of synchronous rectification is about 20% of that of diode regeneration at Tr1N. 14/27 LV8860V Application Note 1-3. Stand-by mode When PWM input duty is 0% or PWM pin is connected to GND, the IC runs stand-by mode. The low signal detection time of stand-by mode is about 400us. In stand-by mode, motor is stopped. The motor starts rotation again as soon as PWM-High signal is detected. Fig.17OperationWaveformofStand‐bymode 15/27 LV8860V Application Note 2. Switching method Outline LV8860V has silent PWM drive new switching method which realizes high efficiency and silent drive. The characteristic waveform in silent PWM mode at phase switch is shown in figure 18. Compared to the conventional switching method, current switch is smooth; therefore, the operation is silent and efficient. The soft switch width before and after phase change is adjustable. As the following figure18 shows, by adjusting soft switch width, current change is optimized. As a result, we can get the following merits. 1. Small kickback waveform 2. Silent drive 3. Higher driving efficiency soft switch width (Duty change area) High Low High DUTY VOUT1 VOUT2 IOUT = 0A IOUT Fig.18WaveformofOUTPUT1/2 withsilentPWMdriveatphasechange Comparison of silent PWM soft switching with conventional switching method VOUT1 VOUT1 VOUT2 VOUT2 IOUT IOUT VOUT1 VOUT1 VOUT2 VOUT2 IOUT IOUT Fig.19 OperationWaveform Upper;conventionalswitchingmethod Lower:PWMsoftswitching(LV8860V) 16/27 LV8860V Application Note 2-1 How to set soft-switch pin The width of soft switch before and after switching is controlled by SSW (No.13pin) voltage. Timing of current changes at phase change is controllable by adjusting soft-switch width. This way, reactive current is reduced and motor is driven efficiently. Fig.20Howtochangesoft‐switchwidth The width of soft-switch before and after switching is controlled by SSW. Therefore, it is adjustable by connecting an external resistance to SSW. Adjustable voltage range is between 1V and 3V. Input SSW voltage range is 1V to 3V. When SSW voltage is High, soft-switch width is wide. When SSW voltage is Low, soft-switch width is narrow. *The evaluation board is open. < Configuration of SSW Voltage > A. *Without adjustment (SSW is open * this is a reference width of soft switch) with IC’s internal resistance: VSSW = 5 × 60k / (90k + 60k) = 2V B. *To widen width of soft switch (connect Rw (resistance) between RGL and SSW.) VSSW = 5 × 60k / {60k + 1 / (1/Rw + 1/90k)} (ex.) Connect Rw = 75kΩ VSSW = 5 × 60k / {60k + 1 / (1/75k + 1/90k)} = 2.97V C. *To narrow soft switch width (connect Rn (resistance) between SSW and GND.) VSSW = 5 × [{1 / (1/Rn + 1/60k)} / {90k + 1 / (1/Rn + 1/60k)}] (ex.) Connect Rn = 39kΩ VSSW = 5 × [{1 / (1/39k + 1/60k)} / {90k + 1 / (1/39k + 1/60k)}] = 1.04V 17/27 LV8860V Application Note 2-2. Effect of soft switching width adjustment LV8860V Full‐Speed 5ms/div LV8860V Full‐Speed 200us/div VOUT1 VOUT2 VOUT1 VOUT2 VFG VFG IOUT IOUT * Because the output current at phase switch is smooth, the operation is efficient. If current switch is not smooth when SSW pin is open, connect a resistor to SSW pin to adjust SSW voltage for an optimum current waveform. Example: If the direction of coil current has not been changed at phase switch VSSW = 2V VSSW = 3V LV8860V Full‐Speed 100us/div VOUT waveform has kickback LV8860V Full‐Speed 100us/div VOUT1 VOUT2 VOUT1 VOUT2 VFG VFG IOUT IOUT VOUT waveform has no kickback Fig.21Efficiencyofadjustingsoft‐switchwidth 18/27 LV8860V Application Note 2-3. Reference amplitude of input signal The width of soft switch in LV8860V is controlled by input signal, IN1/IN2. The external SSW voltage (VSSW) adjusts the difference of input voltage (VINp-p) that creates width of soft switch. The range of SSW input voltage is between 1V and 3V. Referential difference of input signal amplitude in VSSW range: *When VSSW = 1V (min), VINp-p = 30 mV --> make sure to input Hall signal with amplitude difference greater than 30mV. *When VSSW = 2V (open), VINp-p = 90 mV --> make sure to input Hall signal with amplitude difference greater than 90mV. *When VSSW = 3V (max), VINp-p = 150 mV --> make sure to input Hall signal with amplitude difference greater than 150mV. When input signal amplitude is greater than VINp-p (as shown in Fig. A below) Width of soft switch is defined as shown in Fig. A. When input signal amplitude is less than VINp-p. (as shown in Fig. B below). Since input signal is within the range of VINp-p in all rotations, the entire zone is the soft switch zone. Consequently, IC does not operate properly. For such reason, make sure to input Hall signal with enough amplitude difference to SSW setting value so that IC operates properly. Fig.22Reference amplitude of input signal 19/27 LV8860V Application Note 3. Protective Function Outline 3-1. Current limiter *The current limiter is activated when the current detection resistor voltage exceeds 225mV between RF (No.15pin) and GND (No.14pin). When the current limiter is active, LV8860V turns to current regeneration mode and consumes the redundant current; hence, coil current does not flow any higher than the set value. After operating current regeneration for twice the inner clock (typ20us at normal temperature), LV8860V returns to normal operation mode. The waveform during current limiter operation is as follows. Only the Rf resistor value has been changed. <Calculating equation> Iolim = Vlim / Rf Iolim: setting limiter value Vlim: setup voltage (TYP 225mV) Rf: resistance value between RF and GND Where Rf=0.5Ω, current limiter is activated at Iolim=450mA (Iolim = 225mV / 0.5Ω = 450mA). VOUT1 VOUT2 Limiter Line VFG ICC 0.1A/div Rf=0.5Ω,Iolim=225m/0.5=450(mA) *CurrentLimiterisnotoperating VOUT1 VOUT2 VOUT1 VOUT2 VFG VFG ICC 0.1A/div ICC 0.1A/div Limiter Line Rf=1Ω,Iolim=225m/1=225(mA) *CurrentLimiterisoperating VOUT1 VOUT2 Limiter Line VOUT1 VOUT2 VFG VFG ICC 0.1A/div ICC 0.1A/div Rf=2Ω,Iolim=225m/2=112.5(mA) *CurrentLimiterisoperating Fig.23CurrentLimiteroperationwaveform 20/27 LV8860V Application Note 3-2. Lock protector circuit and automatic recovery circuit This IC incorporates lock protector circuit and automatic recovery circuit. If a motor is locked, lock protector function is turned on to prevent motor from destruction. The lock protector repeats conduction mode for approximately 0.95sec and non-conduction mode for approximately 9.0sec at normal temperature. If the lock protector is active during conduction, the IC is set to non-conduction mode again. The above operations are repeated until lock protector is cancelled. When the lock protector is active, RD signal level is High. Fig.24 Lockprotector operationwaveform 3-3. Thermal shutdown function This IC includes thermal shutdown circuit. The thermal shutdown circuit is incorporated and the output is turned off when junction temperature Tj exceeds 180C. As the temperature falls by hysteresis, the output turned on again (automatic restoration). The thermal shutdown circuit does not guarantee the protection of the final product because it operates when the temperature exceed the junction temperature of Tjmax = 150C. Thermal shutdown temperature = 180C (typ) 21/27 LV8860V Application Note Application Circuit Example Figure 25. Sample Application Circuit *1 *2 *3 *4 *5 *6 *7 When diode Di is used to prevent destruction of IC from reverse connection, make sure to implement capacitor Cr to secure regenerative current route. If kickback at a phase change is greater, insert zener diode between GND and VCC or implement the larger capacitor between GND and VCC mentioned in *1. Make sure to implement enough capacitance 0.1uF or greater between RGH pin and VCC pin for stable performance. Make sure to implement enough capacitance 0.1uF or higher between RGL pin and GND pin for stable performance. FG pin and RD pin are open drain output. Keep the pins open when unused. The current limiter is activated when the current detection resistor voltage exceeds 225mV between RF and GND. Where RL=0.5Ω, current limiter is activated at Io=450mA. Setting is made using Rf resistance. Hall element outputs stable hall signal with good temperature characteristic when it is biased with constant voltage from HB pin. If you wish to alleviate heating of IC, do not use HB pin. When you do not use this Pin (Pin HB), pull down with resistor of around 10kΩ (recommended). 22/27 LV8860V Application Note Evaluation Board Manual 1. Evaluation Board circuit diagram Bill of Materials for LV8860V Evaluation Board Designator Qty IC1 1 C1 1 C2,C3 2 R1 Description Motor Driver VM Bypass capacitor Value Tol Footprint Manufacturer Manufacturer Part Number Substitution Allowed Lead Free SSOP16 (225mil) ON Semiconductor LV8860V No Yes GRM21BR 71H105KA Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 1µF ±10% 0805 Murata capacitor 0.1uF ±10% 1608 Murata 1 resistor 1Ω ±5% 0603 KOA R2,R3 2 resistor 10kΩ ±5% 1608 KOA TP1-TP12 8 Test points MAC8 GRM188B3 1H104KA9 2 RK73B1JT TD1R0J RK73B1JT 103 ST-1-3 23/27 LV8860V Application Note Evaluation Board PCB Design 45mm 45mm 45mm (Top side) (Back side) Allowable power dissipation Allowable Power dissipation , Pdmax (W) Specified circuit board: 45mm x 45mm x 1.6mm, glass epoxy 2-layer board 2.0 1.70 1.5 1.15 1.0 0.61 0.54 0.41 0.5 0.0 ‐40 0 40 80 120 Ambient temperature , Ta (℃ ) 24/27 LV8860V Application Note 2. Motor drive 1. Connect a motor to OUT1, OUT2, IN1, IN2, HB and GND. 2. Connect the motor power supply to VCC, and connect the GND line to GND. 3. Connect the PWM signal supply to PWM if speed control is needed. 4. Drive motor to supply voltage to VCC. 5. Motor speed is controllable by adjusting duty of PWM signal. 25/27 LV8860V Application Note Caution for layout Power supply connection terminal [VCC] VCC is the only power supply. The regulator voltage RGL (typ 5V) is the internally generated control power supply. Make sure that supply voltage does not exceed the absolute maximum rating under no circumstance. Noncompliance can ve the cause of IC destruction and degradation. Caution is required for VCC supply voltage because this IC performs switching. The bypass capacitor of the VCC power supply should be close to the IC as much as possible to stabilize voltage. Also if you intend to use large current or back EMF is high, please augment enough capacitance. GND terminal [GND] GND terminal is 0V, hence pattern layout should be in low impedance. Since high current flows into GND, GND terminal should be connected independently. Internal power supply regulator terminal [RGL, RGH] RGL is the control power supply for logic. (typ 5V). RGH is the gate voltage power supply for output Pch-Tr (typ VCC-4.5V). When VCC is energized, the voltage is impressed to RGL and RGH. Connect a capacitor to RGL and RGH respectively to stabilize internal power supply. (Recommended value: 0.1uF or higher) PWM signal input terminal [PWM] PWM signal input could be the cause of noise. Hence, caution is required for pattern layout. OUT terminal [OUT1, OUT2] During PWM operation, VOUT terminal could be the cause of noise. Hence, caution is required for pattern layout. Since motor current flows into OUT terminals, they should be connected at low impedance. Output voltage may boost due to back EMF. Make sure that the voltage does not exceed the absolute MAX ratings under no circumstance. Noncompliance can be the cause of IC destruction and degradation. Current sense resistor connection terminal [RF] Since motor current flows from RF to GND line, it should be connected independently at low impedance. NC terminal NC terminal is not connected to the internal circuit of the IC. Use NC terminal to keep the layout for power supply line and GND line as fat and short as possible 26/27 LV8860V Application Note ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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. 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