Ordering number : ENA2205 LV8850GA Bi-CMOS IC Three-Phase sensorless FAN Motor Pre-Driver http://onsemi.com Overview LV8850GA is a pre-driver IC which is three-phase, sensorless and drives with PWM. LV8850GA drives without a hole sensor, which is suitable for driving high-current motor which requires high reliability and long life. Function • VCC+7V charge pump booster circuit for output drive • Integrated Synchronous Rectifier circuit (Selected by SYNSEL pin) • PWM or DC input signal is selectable (Selected by CTLSW pin) • Adjustable PWM frequency (By the external capacitor at DC input mode) • Integrated Current Limit circuit (highly accurate detection by using sensing (RFGND) pin for monitoring) • Integrated Forward / Reverse rotation switch circuit (Selected by F/R pin) • Integrated Lock Protection circuit with auto-recovery • Output Lock Protection signal (RD pin) / Output 1-hole FG signal (FG pin) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum Supply voltage VCC max VCC pin 18 V Maximum VG voltage VG max VG pin 23 V Maximum RD/FG pin voltage VFG max RD, FG pin 18 V Maximum RD/FG pin current IFG max RD, FG pin 5 mA Maximum Output pin voltage1 VO max1 UH, VH, WH pin 23 V Maximum Output pin voltage2 VO max2 UL, VL, WL pin 6 V Maximum Output pin current IO max UH, VH, WH, UL, VL, WL pin 30 mA Maximum Input pin voltage VL max SOSC, LIM, VCTL, PWMOSC, CSDOSC 6 V Maximum VREG pin current IVREG max VREG pin 5 mA Allowable power dissipation2 Pd max Mounted on a board. *1 Operating temperature Topr – 40 to 95 deg. Storage temperature Tstg – 55 to 150 deg. Junction temperature Tj max 150 deg. 1.2 W *1: Specified board: 76.1mm x 114.3mm x 1.6mm, glass epoxy board 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. ORDERING INFORMATION See detailed ordering and shipping information on page 13 of this data sheet. Semiconductor Components Industries, LLC, 2013 July, 2013 72413NK 20130626-S00001 No.A2205-1/14 LV8850GA Recommended Operating Conditions at Ta = 25°C Parameter Symbol Operating voltage VCC VCC pin Operating supply voltage VCCOP VCC pin *2 VG pin voltage range VG VG pin (VCC+7V) *3 Pin voltage range Input PWM frequency range typ Unit max 12 V 4 SOFTST, CTLSW, SYNSEL, F/R pin IO *4 min SOSC, LIM, VCTL, PWMOSC, CSDOSC VL Output current range Ratings Conditions UL, VL, WL, UH, VH, WH pin f(PWM) 16 V 21 V 0 VREG V 0 25 mA 20 60 kHz *2: When the voltage of VCC is reduced, the speed might not be controllable properly depending on settings. *3: For VG pin, be applied either VCC+7V or 21V, whichever is lower. *4: Make sure to adjust it according to External-FETs and types of Motor and maximum rotation speed. Electrical Characteristics at Ta = 25°C, VCC = 12V Parameter Supply current Symbol ICC Conditions DC input mode, PWM=100% Ratings Min typ Unit max 7 10 13 mA 8 10 12 MHz 3.6 4.0 Internal oscillation circuit Oscillation frequency f(MOSC) Constant voltage output (VREG pin) *5 Output voltage1 VVREG Load fluctuation ΔVREG Io = -5 to 0 mA 4.2 V 100 mV Charge pump output (VG pin) *6 Output voltage VVG Vcc+7 V Output block On-resister of Upper-Tr in H-side On-resister of Lower-Tr in H-side On-resister of Upper-Tr in L-side On-resister of Lower-Tr in L-side RONHH Io=-10mA 25 40 Ω RONHL Io=10mA 40 60 Ω RONLH Io=-10mA 40 60 Ω RONLL Io=10mA 25 40 Ω VCTL amplifier (VCTL pin) at DC input mode (CTLSW pin=High) Input bias current IB (CTL) Gain G (CTL) –1 1 0.57 uA V/V 0% duty input voltage VIN1 (CTL) 3.0 3.2 3.4 V Max duty input voltage VIN2 (CTL) 1.35 1.55 1.75 V VREG – 1 VREG V 0 1 V VREG – 1 VREG V 0 1 V During direct PWM input (VCTL pin) at PWM input mode (CTLSW pin=Low) High level input voltage VIH (PWM) Out transistor ON Low level input voltage VIL (PWM) Output transistor OFF Input mode select pin (CTLSW pin) High level input voltage VIH(CTLSW) DC input mode Low level input voltage VIL(CTLSW) PWM input mode Internal PWM oscillator (PWMOSC pin) High level output voltage VOH (PWM) 2.7 3.0 3.3 V Low level output voltage VOL (PWM) 1.75 2.0 2.25 V Charge/ discharge current I (PWM) ±30 ±45 ±60 uA 2.5V Forward / Reverse switch (F/R pin) *7 High level input voltage VIH (FR) Energization: UOUT -> VOUT -> WOUT VREG – 1 VREG V Low level input voltage VIL (FR) Energization: UOUT -> WOUT -> VOUT 0 1 V Continue to the next page No.A2205-2/14 LV8850GA Continue from the former page Parameter Symbol Conditions Ratings Min typ Unit max Synchronous rectification switch (SYNSEL pin) *11 High level input voltage VIH (SYN) Synchronous rectification control is disabled VREG – 1 VREG V Low level input voltage VIL (SYN) Synchronous rectification control is enabled 0 1 V 0.3 V 600 Hz 0.23 V V FG, RD output (FG pin, RD pin) *8 Low level output voltage Maximum FG frequency *9 VFG FG, RD pin. Io = 2mA f (FG) *10 VRF RF = 0.2 ohm, limit current: 1.05A Current limiter circuit (RF pin) Limiter voltage 0.18 0.21 Lock protection (CSDOSC pin) High level output input VOH (CSD) 1.7 1.9 2.1 Low level output input VOL (CSD) 0.25 0.40 0.55 V Charge current IC (CSD) – 4.5 – 3.5 – 2.5 uA Discharge current ID (CSD) 0.25 0.35 0.45 Ratio of charge and discharge RI (CSD) 8 10 12 uA uA/uA Internal Start-Up oscillator (SOSC pin) High level output input VOH (SOSC) 0.9 1.1 1.3 V Low level output input VOL (SOSC) 0.45 0.60 0.75 V Charge/ discharge current I (SOSC) ±3.5 ±5 ±6.5 uA 0.9 1.2 1.45 V 0.35 0.50 0.65 uA SOFT start (SOFTS pin) SOFT start cancel voltage VIH(STS) SOFTS charge current I(STS) Overheat protection circuit (thermal shutdown) Operating temperature TSDON Design guarantee *10 160 deg. Hysteresis temperature ΔTSD Design guarantee *10 20 deg. *5: For VREG pin, it can be used for only internal and setting of this IC, not for power supply. *6: For VG pin, be applied either VCC+7V or 21V, whichever is lower. And it can not be for power supply. *7: Do not switch R/F pin during motor rotation. This may damage the IC and the motor. *8: For FG, RD output pins, it is recommended to connect pull-up resistor between the pins and power supply of the controller. *9: Be limited by External-FETs and types of Motor. *10: Design guarantee: Signifies target value in design. These parameters are not tested in an independent IC. *11: For heat reduction and higher efficiency, this IC uses synchronous rectification by setting the “SYSNSEL”-pin. However, it may increase supply voltage under usage conditions: * When output duty is reduced rapidly. * PWM input frequency is low. And other. The above behavior depends on inserting a diode for protection against reverse connection, a bypass capacitor value between power supply and GND and FAN motor. Please confirm it enough. If the supply voltage shall increase, make sure that it does not exceed the maximum ratings with the following measures: *Select an optimal capacitor between power supply and GND. *Insert a zener diode between power supply and GND. No.A2205-3/14 LV8850GA Package Dimensions unit : mm (typ) 3253B 9.75 0.5 5.6 7.6 19 36 1 0.18 18 0.15 0.08 (1.0) (0.63) 1.2max (0.5) TSSOP36(275mil) 2.5 Specified circuit board: glass epoxy board 2.0 1.5 1.20 1.0 0.53 0.5 0 - 40 -20 0 20 40 60 80 100 No.A2205-4/14 3 7 COM CIN FIL 4 RD 5 6 TGND TGND2 SOSC 36 VREG 500Ω 36 1 2 Pin name 500Ω Pin No. 9 VCTL VG 1 1kΩ VG 17 18 CPC1 CPC2 16 15 VCC CP1 14 13 12 VREG SGND SOFTST 11 8 LIM CDSOSC 7 SOSC 10 6 TGND2 PWMOSC 5 TGND 3 FG 4 2 FIL RD 1 CIN 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 CP2 VG CTLSW SYNSEL F/R RFGND RF PGND WL WH VL VH UL UH WOUT VOUT UOUT COM LV8850GA Pin Assignment Equivalent Circuit Equivalent Circuit 2 VG 1kΩ 6kΩ 3 FG 25Ω 4 VREG 25Ω 7 Continue to the next page No.A2205-5/14 LV8850GA Continue from the former page Pin No. Equivalent Circuit Pin name 9 VREG 8 LIM VCTL 500Ω 8 9 500Ω 1kΩ 10 VREG 10 200Ω PWMOSC 11 VREG 11 200Ω 500Ω CSDOSC VREG 12 SOFTST 13 SGND 12 500Ω VCC 25Ω 14 VREG 54k Ω 14 100Ω 26kΩ 15 VCC Continue to the next page No.A2205-6/14 LV8850GA Continue from the former page Pin No. Equivalent Circuit Pin name 16 16 17 18 19 20 CP1 CPC1 CPC2 CP2 VG 17 18 19 20 VREG VCC SGND VREG 21 22 23 100kΩ 21 CTLSW SYNSEL F/R 22 1kΩ 23 VREG VCC 24 25 RFGND RF 10kΩ 5kΩ 24 25 26 PGND VREG 27 29 31 27 WL VL UL 25Ω 29 51kΩ 31 VG 28 30 32 28 WH VH UH 25Ω 15Ω 30 51kΩ 32 VG 6kΩ 33 33 34 35 WOUT VOUT UOUT 6kΩ 34 35 6kΩ No.A2205-7/14 LV8850GA Pin Functions Pin No. Pin name 1 CIN 2 FIL 3 FG 4 RD 5 6 TGND TGND2 7 SOSC 8 LIM 9 VCTL 10 PWMOSC 11 CSDOSC 12 SOFTST 13 SGND 14 VREG 15 VCC 16 CP1 17 CPC1 18 CPC2 19 CP2 20 VG 21 CTLSW 22 SYNSEL 23 F/R Function Filter pin for motor position detection comparator. Make sure to connect a capacitor between FIL (PIN2) and CIN. Filter pin for motor position detection comparator. Make sure to connect a capacitor between CIN (PIN1) and FIL. FG pulse output. Outputs pulse equivalent to 1 hole. Synchronizes with U-phase. Motor lock detection output. Outputs high level voltage when the motor is locked. Auto-recovery lock protection circuit. Test pin. Connect to SGND. Setting pin for motor startup frequency. Make sure to connect a capacitor between SOSC and GND. Adjusts startup frequency according to charge/discharge current and the capacitor. Voltage input for setting the lowest speed during DC control signal input mode. By dividing the regulator voltage with resistance and inputting the voltage (1 < LIM < 3V), you can set the lowest speed for the motor. Motor control voltage input. VCTL functions as DC control signal input pin and PWM control input signal input pin. CTLSW (PIN21) switches between DC input and PWM input. Reference frequency setting for PWM switching. Make sure to connect a capacitor between PWMOSC and GND. You can set a carrier frequency for PWM switching during DC control signal input mode by adjusting the capacitor. Setting pin for motor lock detection time. Make sure to connect a capacitor between CSDOSC and GND. You can set time to start lock protection operation by adjusting the capacitor. Setting pin for soft start time. By connecting a capacitor between SOFTS and GND, you can start up the motor smoothly. GND for the IC. Regulator voltage output (4V). Make sure to connect a capacitor between VREG and GND. You cannot supply power outside the IC. Supply for the IC. Make sure to connect a capacitor between VCC and GND. Charge pump: pulse output for the 1st stage booster. Make sure to connect a capacitor between CP1 and CPC1 (17PIN). Charge pump: a pin for the 1st stage booster. Make sure to connect a capacitor between CPC1 and CP1 (PIN16). Charge pump: a pin for the 2nd stage booster. Make sure to connect a capacitor between CPC2 and CP2 (PIN19). Charge pump: pulse output for the 2nd stage booster. Make sure to connect a capacitor between CP2 and CPC2 (PIN18). Charge pump: output for booster voltage. Make sure to connect a capacitor between VG and GND. Switching pin for control input signal. CTLSW= “High”: DC control signal input mode CTLSW=”Low”, PWM control signal input mode Configuration should be performed according to control method. Switching pin for synchronous rectification operation. SYNSEL=”High”: Stop SYNSEL=”Low”: Enable Switching pin for motor rotation direction. The order of energization to the motor is as follows: "High" input: U→V→W "Low" input: U→W→V By changing the order, rotation direction is switched. Do not switch operation while the motor is driving. Continue to the next page No.A2205-8/14 LV8850GA Continue from the former page Pin No. Pin name 24 RFGND 25 RF 26 27 29 31 28 30 32 33 34 35 36 PGND WL VL UL WH VH UH WOUT VOUT UOUT COM Function GND for RF sensing for drive current detection. By connecting RFGND to RF (PIN25), drive current is detected with high precision. RF sensing for drive current detection. By connecting RF to RFGND, drive current is detected. GND for the IC. Low-side pre-driver outputs. Make sure to connect Nch-Tr gate for motor drive to each pin. They outputs drive signal for the sink. High-side pre-driver outputs. Make sure to connect Nch-Tr gate for motor drive to each pin. They outputs drive signal for the source. Detection pin for motor back EMF voltage. Make sure to connect them to each phase of U,V,W of the motor. Connection pin for motor midpoint. No.A2205-9/14 LV8850GA Block Diagram CIN 1 COM 36 FIL 2 UOUT 35 FG 3 VOUT 34 RD 4 WOUT 33 TGND 5 RD Waveform Synthesis FG TGND2 6 SOSC 7 UL 31 VH 30 START OSC Main OSC LIM 8 VCTL 9 PWMOSC 10 CDSOSC 11 SOFTST 12 CTLSW PWM input DC input Selector PWM OSC CSD OSC VCC 15 CP1 16 SENSORLES S LOGIC PRE DRIVER VL 29 WH 28 WL 27 PGND 26 TSD RF 25 Soft Start RFGND 24 SGND 13 VREG 14 UH 32 VREG F/R 23 CHARGE PUMP SYNSEL 22 CTLSW 21 CPC1 17 VG 20 CPC2 18 CP2 19 No.A2205-10/14 LV8850GA Application Circuit Example * Each fixed number in the following FIG. is the referential value. Make sure to adjust it according to External-FETs and types of Motor. C1 CIN 1 COM 36 FIL 2 UOUT 35 *12 FG 3 VOUT 34 *14 *12 RD 4 WOUT 33 *14 TGND 5 UH 32 *14 TGND2 6 UL 31 SOSC 7 VH 30 LIM 8 VL 29 *4 *11 R2 *11 R1 *8 C3 R8 R7 D2 VCTL *12 9 R5 PWMOSC *16 10 C2 CDSOSC *7 11 C4 SOFTST *6 12 C5 SGND 13 C8 VREG *10 14 *17 C9 *3 C10 D1 *17 *9 C7 *2 R10 C21 C15 R11 C16 C13 R12 WH 28 *18 C22 C17 R13 C18 WL 27 PGND 26 R14 RF 25 C19 C23 RFGND 24 R15 F/R 23 VCC 15 SYNSEL 22 CP1 16 CTLSW 21 CPC1 17 VG 20 CPC2 18 CP2 19 C20 FET R9 R16 C14 *5 *1C C11 *9 C6 *9 C12 *1E *1A *1B C1 C2 C3 C4 C5 C6 C7 C12 C8 C9 C10 C11 R1 R2 R3 R4 R5 R7 R8 1000pF 470pF 1000pF 2.2uF 2.2uF 0.15uF 0.15uF 0.47uF 0.47uF 10uF 0.1uF 47uF 100 Ω 100 Ω 100k Ω 100k Ω 100 Ω 100k Ω 100k Ω D1 D2 DSE010 DSP10 *1D B-EMF detection filter PWM oscillator Start-Up oscillator Lock-detection time Soft Start time Charge pump Charge pump Charge pump VREG VREG VCC VCC RD FG RD FG Input signal LIM LIM C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C13 470pF 220pF 220pF 220pF 220pF 220pF 220pF 0.1uF 0.1uF 0.1uF 33uF R9 R10 R11 R12 R13 R14 R15 R16 FET 510 Ω 330 Ω 510 Ω 330 Ω 510 Ω 330 Ω 510 Ω 0.2 Ω NTMD5836 RF filter FET FET FET FET FET FET FET FET FET VM RF filter FET, gate resistor FET, gate resistor FET, gate resistor FET, gate resistor FET, gate resistor FET, gate resistor RF resistor Nch / Nch A value of these circuit fixed number is one example. Make sure to adjust it according to External-FETs and types of Motor. No.A2205-11/14 LV8850GA *1A, *1B, *1C, *1D, *1E .<GND line> GND is classified as follows: SGND, PGND RFGND and MGND. SGND (*1A) : Small-signal (VREG4, TGND, TGND2, PWMOSC, SYNSEL, CTLSW, SGND, VCTL, LIM, SOFTS, F/R, CSDOSC, SOSC) MGND (*1B) : Middle-signal (PGND) PGND (*1D) : Power-signal (GND-side of RF-resistor, GND-side of bypass-capacitor for a Motor) RFGND (*1C) : Sensing-signal (RFGND) When design a PCB layout, SGND(*1A), MGND(*1B) and PGND(*1D) should be connected at a single GND with a capacitor (power supply stabilizer capacitor(*1E)) between VCC and GND. Power supply and GND should be connected as wide and short as possible. RFGND should be connected near the resistance which should be lined separately from the other GND line. *2.<Power supply stabilizer capacitor for power stabilization> Power supply stabilization capacitor(C11) should be 10uF or higher. *3.<Noise rejection capacitor> Noise rejection capacitor(C10) should be connected as short as possible. *4.<CIN, FIL pin> Connection pin for filter capacitor. LV8850 detects rotor position using back-EMF (electromotive force) which is generated during rotation of the motor. Based on the information, energization timing for output pins are defined. Problems in startup due to noise can be improved by connecting a filter capacitor (C1) between CIN and FIL. If the capacitance is too high, energization timing of the output during high-speed rotation is delayed and efficiency is degraded. Make sure to connect capacitor between COMIN and FIL as short as possible to reject noise. *5.<RF pin> Setting pin for current limiter. When pin voltage is higher than 0.21V, current is limited and recirculation mode is set. In the example of application circuit, current limiter is set at 1A. RF resistance (R16) is calculated as follows: RF resistance = 0.21V/ desired current limit value. If detection precision of current limit is low due to noise, make sure to insert a filter (R9, C14) between RF and RFGND. *6.<SOFTST pin> Setting pin for soft start. Motor rotation count increases gradually by connecting a capacitor (C5) between SOFTST pin and SGND. The period of Soft-Start is calculated approximately as follows: Period of Soft-Start ≈ Capacitor value / 380 × 10-9 ex) In the case of Capacitor value = 2.2uF, Then Period of Soft-Start ≈ 5.8s *7.<CSDOSC pin> Capacitor connection pin for lock detection. It integrates constant current charger, constant current discharger circuit. Lock protection time can be modified by connecting capacitor (C4) between CSDOSC and SGND. When it isn’t used, then make sure to connect to SGND. The Period of Start-Up and Lock is calculated approximately as follows: Period of Start-Up ≈ Capacitor value * 0.43 × 106 Period of Lock ≈ Capacitor value * 4.29 × 106 ex) In the case of Capacitor value = 2.2uF, Then Period of Start-Up ≈ 0.9s Period of Lock ≈ 9.4s *8.<SOSC pin> Capacitor connection pin for setting startup frequency. Make sure to connect a capacitor (C3) between SOSC and SGND. The capacitor is required for SOSC pin to define frequency to start up motor. Also make sure to confirm constant when you change motors or circuit specification because optimum value changes according to startup condition. The Frequency of SOSC is calculated approximately as follows: Frequency of SOSC ≈ 5 × 10-6 / Capacitor value ex) In the case of Capacitor value = 1000pF, Then Frequency of SOSC ≈ 5kHz No.A2205-12/14 LV8850GA *9<VG,CP1,CPC1,CP2,CPC2 pin> Capacitor connection pin for pre-drive voltage generation and pre-drive power supply stabilizer. Make sure to connect capacitor to the pins because they generate voltage to drive upper output DMOS transistor. The layout should be as wide and short as possible. *10.<VREG pin> Power supply pin for the internal control block. Regulator output pin to generate power supply for the control circuit. Make sure to connect capacitor (C8, C9) between VREG and SGND to stabilize operation of the control block. Make sure to connect the capacitor with greater capacitance than the one connected to the charge pump because it is used for power supply to the control block and to generate charge pump voltage. *11.<FG/RD pin> Since FG, RD output are open-drain, it is recommended to connect pull-up resistance between FG and RD and the power supply for the controller. *12.<Noise rejection resistor> Make sure to implement resistance (R1, R2, R5) for protection because the line is easily influenced by noise. *14.<UOUT,VOUT,WOUT,COM pin> Back EMF detection pins. Make sure to line the pins as short as possible without crossing with the other lines. *15.<VCTL pin> Make sure not to open. *16.<PWMOSC pin> Capacitor connection pin for setting PWM frequency. When it is the “DC control signal input mode”, make sure to connect a capacitor (C2) between PWMOSC and SGND as short as possible. When it is the “PWM control signal input mode”, make sure to be open. Also make sure to confirm constant when you change motors or circuit specification because optimum value changes according to motor rotation speed. The Frequency of PWM is calculated approximately as follows: Frequency of PWM ≈ 23 × 10-6 / Capacitor value ex) In the case of Capacitor value = 470pF, Then Frequency of PWM ≈ 49kHz *17.<Separation of power supply> Make sure to insert a diode to prevent the inverted-current from a motor. *18.<Protection of VM (power supply for a motor)> When the motor power supply voltage (VM) abnormally rises by environment to use, please insert a Zener diode between a motor power supply and motor GND. ORDERING INFORMATION Device LV8850GA-AH Package TSSOP36 (275mil) (Pb-Free / Halogen Free) Shipping (Qty / Packing) 1000 / Tape & Reel No.A2205-13/14 LV8850GA ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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