Ordering number : ENA1441 Bi-CMOS LSI LV8804FV PC and Server Fan Motor Driver Overview The LV8804FV is a motor driver for PC and server fans. Feature • Direct PWM 3-phase sensorless motor driver Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit VCC maximum supply voltage VCC max 16 V VG maximum supply voltage VG max 21 V OUT pin maximum output current IOUT max 1.2 A SOFTST pin withstand voltage VSOFTST max 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 FG pin maximum output current IFG max 5 mA Allowable Power dissipation Pd max1 Independent IC 0.6 W Pd max2 Mounted on specified board * 1.3 W UO, VO, and WO pins Operating temperature Topr -40 to +85 °C Storage temperature Tstg -55 to +150 °C * Specified board: 76.1mm × 114.3mm × 1.6mm, glass epoxy board (single-layer) Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. 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. 42809 MS PC 20090330-S00014 No.A1441-1/9 LV8804FV 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 Ron (H+L) IO = 0.7A, VCC = 12V, VG = 17V 1.2 2 Ω on 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 0 3 V Motor drive off voltage input range VCTLOFF 3.5 VREG V VMINSP1 1 3 V VMINSP2 4 VREG V 4 VREG V 0 1 V 0.25 0.35 V 0.25 0.275 V Minimum speed setting pin Minimum speed setting voltage input range Minimum speed releasing voltage input range 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 output pin FG output pin low-level voltage VFG When IO is 2mA VRF Limit current set to 1A when RF is 0.25Ω. 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.A1441-2/9 LV8804FV Package Dimensions unit : mm (typ) 3360 Pd max -- Ta Allowable power dissipation, Pd max -- W 1.2 5.2 0.5 4.4 6.4 20 12 0.5 0.22 0.15 1.5 MAX (1.3) (0.35) 1.0 0.95 Thermal resistance evaluation board : 76.1×114.3×1.6mm3 glass epoxy Thermal resistance evaluation board 0.8 0.6 0.4 0.42 Independent IC 0.3 0.2 0.13 0 -30 -20 0 20 40 60 80 100 120 0.1 Ambient temperature,Ta -- °C SANYO : SSOP20J(225mil) Pin Assignment SOFTST 1 20 MINSP FG 2 19 CTL CT 3 18 F/R OSC 4 17 VREG GND 5 16 FIL LV8804FV VG 6 15 COMIN CP 7 14 COM CPC 8 13 VCC RF 9 12 UO WO 10 11 VO Top view No.A1441-3/9 LV8804FV Block Diagram VCC FG CT 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 GND UO VO WO COM RF SOFTST No.A1441-4/9 LV8804FV Pin Function Pin No. 1 Pin name SOFTST Function Equivalent circuit Soft start time setting. VREG The motor can be started smoothly by connecting a capacitor between this pin and ground. 500Ω 1 2 FG FG pulse output. This pin outputs a Hall 2 sensor system equivalent pulse signal. 3 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 capacitor between this pin and ground. 500Ω 3 4 OSC Motor startup frequency setting. A capacitor VREG must be connected between this pin and ground. The startup frequency is adjusted by controlling the charge/discharge current and 500Ω capacitance of the capacitor. 4 5 GND GND pin. 6 VG Charge pump step-up voltage output. 7 A capacitor must be connected between this pin and the VCC pin or ground. 7 CP 500Ω 8 VCC VREG Charge pump step-up pulse output pin. 6 A capacitor must be connected between this pin and the CPC pin (pin 14). 8 CPC Charge pump step-up pin. A capacitor must be connected between this pin and the CP pin (pin 13). 13 VCC Power supply for the IC and motor. 13 Capacitors must be connected between these pins and ground. 12 UO Output pins. Connect these pins to the U, V, 11 VO and W of the motor coil. 10 WO 9 RF 12 11 10 50kΩ 50kΩ 50kΩ 9 Output current detection pins. The drive current is detected by connecting a resistor between these pins and ground. Continued on next page. No.A1441-5/9 LV8804FV Continued from preceding page. Function COM Motor middle point connection. 15 COMIN Motor position detection comparator filter Equivalent circuit VG UO VO WO 50kΩ pin. A capacitor must be connected between this pin and the FIL pin (pin 16). 16 FIL Motor position detection comparator filter 50kΩ Pin name 14 50kΩ Pin No. 14 pin. A capacitor must be connected between this pin and the COMIN pin (pin 15). 15 17 VREG Regulator voltage (5V) output. 16 VCC A capacitor must be connected between these pins and ground. 17 VREG 18 F/R Motor rotation direction switching. A high-level input causes current to flow into VREG Reverse signal 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 turns the motor in the opposite direction. 15kΩ Forward/reverse switching signal 18 100kΩ Forward signal 19 CTL Motor control voltage input. VREG When the control voltage is higher than 3V (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 > 1V). When the control voltage becomes lower that 1V (1V > CTL voltage), the current limit set by the RF resistor is reached. 20 MINSP Minimum speed setting voltage input. The minimum speed of the motor can be set by resistor-dividing the regulator voltage and 500Ω 500Ω feeding the resultant voltage that is within the range of 1V to 3V (1 V < MINSP < 3V). 20 19 No.A1441-6/9 LV8804FV LV8804FV 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.A1441-7/9 LV8804FV Application Circuit Example *2 10µF/25V 0.1µF *9 VCC UO VO WO COM VG CP *9 0.1µF CPC VREG COMIN 47kΩ 1µF/10V 0.01µF *3 MINSP 47kΩ FIL *8 RFG= 10k to 100kΩ 22kΩ CTL 68kΩ 4,7kΩ FG 1µF 10kΩ F/R 27kΩ PWM 1µF *4 1µF *6 1000pF *7 CT SOFTST OSC GND *5 RF 0.25Ω *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. *3. COMIN and FIL pins These pins are used to connect the filter capacitor. The LV8804FV uses the back EMF signal generated when the motor is running to detect the information on the rotor position. The IC determines the timing at which the output block applies current to the motor based on the position information obtained here. Insert a filter capacitor (1,000pF to 10,000pF) between the COMIN pin and FIL pin to prevent any motor startup miss-operation 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. *4. CT pin This pin is used to connect the lock detection capacitor. The constant-current charging and constant-current discharging circuits incorporated 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. *5. 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 *6. 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 LV8804FV is switched to normal control. If the soft start function is not going to be used, connect the pin to the VREG pin. No.A1441-8/9 LV8804FV *7. 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 (recommended 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. *8. 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 must be short-circuited. *9. 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. *10. 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. 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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. 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 April, 2009. Specifications and information herein are subject to change without notice. PS No.A1441-9/9