Ordering number : ENA1407A LV8804V Bi-CMOS LSI PC and Server http://onsemi.com Fan Motor Driver Overview The LV8804V is a motor driver for PC and server fans. Feature • Direct PWM three-phsae sensorless motor driver Specifications Absolute Maximum Ratings at Ta = 25°C Parameter VCC maximum supply voltage Symbol Conditions VCC max VG maximum supply voltage VG max OUT pin maximum output current IOUT max SOFTST pin withstand voltage VSOFTST max Ratings Unit 16 UO, VO, and WO pins V 21 V 1.2 A 6 V FR pin withstand voltage VFR max 6 V CTL pin withstand voltage VCTL max 6 V MINSP pin withstand voltage VMINSP max 6 V FG output pin withstand voltage VFG max 16 V 5 mA FG pin maximum output current IFG max 1/2FG output pin withstand voltage V1/2FG max 16 V 1/2FG pin maximum output current I1/2FG max 5 mA RD output pin withstand voltage VRD max 16 V RD pin maximum output current IRD max 5 mA Allowable Power dissipation 1 Pd max1 Independent IC 0.6 W Allowable Power dissipation 2 Pd max2 Mounted on designated board * 1.3 W Operating temperature Topr -30 to +95 °C Storage temperature Tstg -55 to +150 °C * : When mounted on the designated 76.1mm × 114.3mm × 1.6mm, glass epoxy board (single-layer) 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. Semiconductor Components Industries, LLC, 2013 May, 2013 N0211 SY 20111019-S00004/31109 MS PC 20090114-S00008 No.A1407-1/10 LV8804V Allowable Operating Conditions at Ta = 25°C Parameter Symbol VCC supply voltage VCC SOFTST input voltage range FR input voltage range Conditions Ratings Unit 6 to 15 V VSOFTST 0 to VREG V VFR 0 to VREG V CTL input voltage range VCTL 0 to VREG V MINSP input voltage range VMINSP 0 to VREG V Electrical Characteristics at Ta = 25°C, VCC = 12V, unless otherwise specified Parameter Symbol Ratings Conditions min Circuit current 1 typ Unit max ICC1 3 VVG 17 4 mA Charge pump block Charge pump output voltage V Regulator block 5V regulator voltage VVREG 4.75 5 5.25 V Output on resistance High-side output transistor on resistance Ron (H) IO = 0.7A, VG = 17V 0.6 1.0 Ω Low-side output transistor on resistance Ron (L) IO = 0.7A, VCC = 12V 0.6 1.0 Ω Sum of high-/low-side output transistor on Ron (H+L) IO = 0.7A, VCC = 12V, VG = 17V 1.2 2 Ω resistance Startup oscillator (OSC) pin OSC pin charge current IOSCC -2.5 μA OSC pin discharge current IOSCD 2.5 μA Control voltage input (CTL) pin Motor drive on voltage input range VCTLON Motor drive off voltage input range VCTLOFF 0 3 V 3.5 VREG V Minimum speed setting pin Minimum speed setting voltage input range VMINSP1 1 3 V Minimum speed releasing voltage input range VMINSP2 4 VREG V 4 VREG V 0 1 V Forward/reverse switching pin High-level input voltage range VFRH Order of current application : UOUT→VOUT→WOUT Low-level input voltage range VFRL Order of current application : UOUT→WOUT→VOUT FG, 1/2FG, and RD output pins FG output pin low-level voltage VFG When IO is 2mA 0.25 0.35 V 1/2FG output pin low-level voltage V1/2FG When IO is 2mA 0.25 0.35 V RD output pin low-level voltage VRD When IO is 2mA 0.25 0.35 V VRF Limit current set to 1A when RF is 0.25Ω. 0.25 0.275 V Current limiter circuit Limiter voltage 0.225 Constraint protection circuit CT pin high-level voltage VCTH 2.25 2.8 2.95 V CT pin low-level voltage VCTL 0.43 0.5 0.65 V CT pin charge current ICTC -2.9 -2.5 -2.2 μA CT pin discharge current ICTD 0.23 0.25 0.32 μA ICT charge/discharge ratio RCT 7 10 13 Soft start circuit Soft start releasing voltage VSOFTST 2.5 V SOFTST pin charge current ISOFTST 0.6 μA Thermal protection circuit Thermal protection circuit operating TSD Design target * 150 180 210 °C temperature * : Design target value and no measurement is made. The thermal protection circuit is incorporated to protect the IC from burnout or thermal destruction. Since it operates outside the IC's guaranteed operating range, the customer's thermal design should be performed so that the thermal protection circuit will not be activated when the fan is running under normal operating conditions. No.A1407-2/10 LV8804V Package Dimensions unit : mm (typ) 3361 SIDE VIEW TOP VIEW BOTTOM VIEW 15.0 36 (3.5) 0.5 5.6 7.6 (4.0) 1 2 0.3 0.8 0.2 0.1 (1.5) SIDE VIEW 1.7 MAX (0.7) SANYO : SSOP36J(275mil) Pin Assignment Pd max – Ta COMIN 1 36 COM FIL 2 35 VCC VREG 3 34 VCC VREG 4 33 VCC NC 5 32 VCC NC 6 31 NC F/R 7 30 UO CTL 8 29 VO MINSP 9 Allowable power dissipation, Pd max – W 1.5 Thermal resistance evaluation board 1.30 Thermal resistance evaluation board : 76.1 × 114.3 × 1.6mm3 glass epoxy 1.0 Independent IC 0.60 0.57 0.5 0.26 0 – 30 – 20 0 20 40 60 80 100 120 Ambient temperature, Ta – °C 28 WO LV8804V SOFTST 10 27 RF FG 11 26 RF 1/2FG 12 25 NC NC 13 24 RF RD 14 23 SUB_GND NC 15 22 CPC CT 16 21 CP OSC 17 20 VG GND 18 19 GND Top view No.A1407-3/10 LV8804V Block Diagram 1/2FG FG CT RD FG RD CTOSC VREF VG CPO CP CHARGE PUMP CTL CTLAMP CTL VREG REFOSC VREG VREG MINSP SENSORLESS LOGIC OSC F/R START OSC PRI DRIVE FIL VCC COMIN SELECTOR COM CURR LIM SUB_GND GND UO VO WO COM RF SOFTST No.A1407-4/10 LV8804V Pin Function Pin No. Pin name Function 36 COM Motor middle point connection. 1 COMIN Motor position detection comparator filter Equivalent circuit VG pin. A capacitor must be connected between this pin and the FIL pin (pin 2). 2 FIL 36 Motor position detection comparator filter pin. A capacitor must be connected between this pin and the COMIN pin (pin 5). 1 3 VREG 4 Regulator voltage (5V) output. 2 VCC A capacitor must be connected between these pins and ground. 3 4 VREF 5, 6, NC 13, 15, No connection. These pins are not connected with the internal parts. 25, 31 7 F/R Motor rotation direction switching. A VREG Reverse signal high-level input causes current to flow into the motor in the order of U, V, and W and a low-level input in the order of U, W, and V. Changing the order of current application 7 15kΩ Forward/reverse switching signal turns the motor in the opposite direction. 100kΩ Forward signal 8 CTL Motor control voltage input. VREG When the control voltage is higher than 3 V (3V < CTL voltage), the motor stops. The motor speed is controlled by varying the control voltage within the range of 3V to 1V (3V > CTL voltage > 1 V). When the control voltage becomes lower that 1V (1 V > CTL voltage), the current limit set by the RF resistor is reached. 9 MINSP Minimum speed setting voltage input. The minimum speed of the motor can be set by resistor-dividing the regulator voltage and feeding the resultant voltage that is within the range of 1V to 3V (1 V < MINSP < 3V). 500Ω 500Ω 9 10 SOFTST Soft start time setting. The motor can be started smoothly by 8 VREG connecting a capacitor between this pin and ground. 500Ω 10 Continued on next page. No.A1407-5/10 LV8804V Continued from preceding page. Pin No. 11 Pin name FG Function Equivalent circuit FG pulse output. This pin outputs a Hall 11 12 14 sensor system equivalent pulse signal. 12 1/2FG FG pulse output. This pin outputs 1/2 Hall sensor system equivalent pulse signal. 14 RD Motor lockup detection output. Output is fixed high when motor is locked up. 16 CT Motor lockup detection time setting. VREG When the motor lockup condition is detected, the protection time period before the protection circuit is activated is set by connecting a cacacitor between this pin and ground. 500Ω 16 17 OSC Motor startup frequency setting. A capacitor must be connected between this pin and VREG ground. The startup frequency is adjusted by controlling the charge/discharge current and 500Ω capacitance of the capacitor. 17 18, 19 20 GND GND pin. VG Charge pump step-up voltage output. 500Ω 21 A capacitor must be connected between this pin and the VCC pin or ground. 21 CP Charge pump step-up pulse output pin. 22 VCC VREG 20 A capacitor must be connected between this pin and the CPC pin (pin 22). 22 CPC Charge pump step-up pin. A capacitor must be connected between this pin and the CP pin (pin 21). 23 32, 33, SUB_GND GND pin. VCC Power supply for the IC and motor. 34, 35 32 33 Capacitors must be connected between 34 35 these pins and ground. 30 UO Output pins. Connect these pins to the U, V, 29 VO and W of the motor coil. 28 WO 24, 26, RF 27 Output current detection pins. The drive current is detected by connecting a resistor between these pins and ground. 28 29 30 24 26 27 No.A1407-6/10 LV8804V LV8804V Functional Description 1 Control Characteristics IRF When RF = 0.25Ω The gradient and limit current are determined by the resistance of the RF pin. 1A Minimum speed This minimum speed is determined by the MINSP pin voltage. 0.5A VCTL 0V 1V 2V 3V 4V The current flowing to the motor and the control characteristics are determined by adjusting the resistance of the RF resistor. By connecting a resistor with a resistance of 0.25Ω between the RF pin and GND, the limit current is set at a motor current of 1A, and the control characteristics shown in the diagram above are achieved. By increasing the RF resistance, the limit current is reduced; conversely, by reducing the RF resistance, the limit current is increased. Since IO max. is 1.2A, the RF resistance must be set in such a way that the current flowing to the motor does not exceed this maximum value. By varying the CTL voltage between 1V and 3V, the current flowing to the output is limited. PWM control is exercised within the voltage range above (1V to 3V) to control the motor speed. When the CTL voltage is less than 1V, the current limiter value determined by the RF resistance is reached, and the motor speed is limited. When the CTL voltage is greater than 3V, PWM is reduced to 0%, and the motor stops. (However, the motor does not stop if the minimum speed has been set.) The minimum speed can be set by resistor-dividing the REG voltage (5V) to create a voltage of 1V to 3V, and inputting this voltage to the MINSP pin. If the minimum speed is not going to be set, the MINSP pin and CTL pin (pin 8) must be short-circuited. 2. Timing at Startup (soft start) VCC pin CTL pin Stop Soft start SOFTS pin Stop Full speed The gradient changes in accordance with the capacitance of the SOFTST pin. (The higher the capacitance, the steeper the gradient.) Full speed No.A1407-7/10 LV8804V Application Circuit Example *3 VCC UO VG VO CP WO COM CPC COMIN VREG *11 MINSP FIL *9 *13 *12 CTL FG FG *13 1/2FG 1/2FG *13 RD FR PWM RD CT SOFTST OSC *8 1000pF RF GND SUB GND *1 *1. Power supply and GND wiring The GND is connected to the control circuit power supply system. *2. Power-side power stabilization capacitor For the power-side power stabilization capacitor, use a capacitor of 10μF or more. Connect the capacitor between VCC and GND with a thick and along the shortest possible route. The VCC pins (pins 32, 33, 34, and 35) must be short-circuited on the print pattern. The GND pins (pins 18 and 19) and the SUB_GND pin (pin 23) must be short-circuited on the print pattern. LV8804V uses synchronous rectification for high efficiency drive. Synchronous rectification is effective for heat reduction and higher efficiency. However, it may increase supply voltage. If the supply voltage shall increase, make sure that it does not exceed the maximum ratings by inserting a zener diode between power supply and GND. *3. Reverse connection protection diode This diode protects reverse connection. Insert a diode between power supply and VCC pin to protect the IC from destruction due to reverse connection. Connection of this diode is not necessary required. *4. COMIN and FIL pins These pins are used to connect the filter capacitor. The LV8804 uses the back EMF signal generated when the motor is running to detect the information on the rotor position. The IC dertermines the timing at which the output block applies current to the motor based on the position information obtained here. Insert a filter capacitor with a capacitance ranging from 1,000pF to 10,000pF (reference value) between the COMIN pin and FIL pin to prevent any motor startup missoperation that is caused by noise. However, care must be taken since an excessively high capacitance will give rise to deterioration in efficiency and delays in the output power-on timing while the motor is running at high speed. Furthermore, connect the capacitor between the COMIN pin and FIL pin as close as possible in order to avoid the effects of noise from other sources. No.A1407-8/10 LV8804V *5. CT pin This pin is used to connect the lock detection capacitor. The constant-current charging and constant-current discharging circuits inporporated causes locking when the pin voltage reaches 2.5V, and releasing the lock protection when it drops to 0.5V. This pin must be connected to the GND when it is not going to be used. *6. RF pins These pins are used to set the current limit. When the pin voltage exceeds 0.25V, the current is limited, and regeneration mode is established. In the application circuit, this voltage is set in such a way that the current limit will be established at 1A. The calculation formula is given below. RF resistance = 0.25V/target current limit value All the RF pins (pins 24, 26 and 27) must be short-circuited on the print pattern. *7. SOFTST pin This pin is used to set the soft start. By connecting a capacitor between this pin and GND, the motor speed can be increased gradually. When the pin voltage exceeds 2.5V, the soft start is released, and the LV8804V is switched to normal control. If the soft start function is not going to be used, connect the pin to the VREG pin. *8. OSC pin This pin is used to connect the capacitor for setting the startup frequency. A capacitor with a capacitance ranging from about 500pF to 2,200pF (reference value) must be connected between this pin and GND. The OSC pin determines the motor startup frequency, so be sure to connect a capacitor to it. <How to select the capacitance> Select a capacitance value that will result in the shortest possible startup time for achieving the target speed and produce minimal variations in the startup time. If the capacitance is too high, variations in the startup time will increase; conversely, if it is too low, the motor may idle. The optimum OSC constant depends on the motor characteristics and startup current, so be sure to recheck them when the type of motor used or circuit specifications are changed. *9. MINSP pin This pin is used to input the voltage to set the minimum speed. The minimum speed can be set by resistor-dividing the VREG voltage (5V) to create a voltage of 1 to 3V, and inputting this voltage to the MINSP pin. If the minimum speed is not going to be set, the MINSP pin and CTL pin (pin 8) must be short-circuited. *10. VG, CP, and CPC pins These pins are used to connect the capacitors to generate the pre-drive voltage and stabilize the pre-drive power supply. Be sure to connect these capacitors in order to generate the drive voltage for the high-side (upper) output DMOS transistor. *11. VREG pins These are the control system power supply pin and regulator output pin, which create the power supply of the control unit. Be sure to connect a capacitor between this pin and GND in order to stabilize control system operation. Since these pins are used to supply current for control and generate the charge pump voltage, connect a capacitor with a capacitance that is higher than that of the capacitor connected to the charge pump. Both the VREG pins (pins 3 and 4) must be short-circuited on the print pattern. *12. CTL Change by the Slew Rate of 0.5V/ms or more and use the voltage of the CTL pin. The current might return to the power supply when using it below the above-mentioned Slew Rate and IC be destroyed. *13. Pin protection resistor It is recommended that resistors higher than 1kΩ are connected serially to protect pins against misconnection such as GND open and reverse connection. No.A1407-9/10 LV8804V 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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