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| Ordering number : ENA1441 Bi-CMOS LSI LV8804FV Overview PC and Server Fan Motor Driver 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 = 25C Parameter VCC maximum supply voltage VG maximum supply voltage OUT pin maximum output current SOFTST pin withstand voltage FR pin withstand voltage CTL pin withstand voltage MINSP pin withstand voltage FG output pin withstand voltage FG pin maximum output current Allowable Power dissipation Symbol VCC max VG max IOUT max VSOFTST max VFR max VCTL max VMINSP max VFG max IFG max Pd max1 Pd max2 Operating temperature Storage temperature Topr Tstg Independent IC Mounted on specified board * UO, VO, and WO pins Conditions Ratings 16 21 1.2 6 6 6 6 16 5 0.6 1.3 -40 to +85 -55 to +150 Unit V V A V V V V V mA W W C C * Specified board: 76.1mm x 114.3mm x 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 = 25C Parameter VCC supply voltage SOFTST input voltage range FR input voltage range CTL input voltage range MINSP input voltage range Symbol VCC VSOFTST VFR VCTL VMINSP Conditions Ratings 6 to 15 0 to VREG 0 to VREG 0 to VREG 0 to VREG Unit V V V V V Electrical Characteristics at Ta = 25C, VCC = 12V, unless otherwise specified Parameter Circuit current 1 Charge pump block Charge pump output voltage Regulator block 5V regulator voltage Output on resistance High-side output transistor on resistance Low-side output transistor on resistance Sum of high-/low-side output transistor on resistance Startup oscillator (OSC) pin OSC pin charge current OSC pin discharge current Control voltage input (CTL) pin Motor drive on voltage input range Motor drive off voltage input range 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 Low-level input voltage range FG output pin FG output pin low-level voltage Current limiter circuit Limiter voltage Constraint protection circuit CT pin high-level voltage CT pin low-level voltage CT pin charge current CT pin discharge current ICT charge/discharge ratio Soft start circuit Soft start releasing voltage SOFTST pin charge current Thermal protection circuit Thermal protection circuit operating 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. TSD Design target * 150 180 210 C VSOFTST ISOFTST 2.5 0.6 V A VCTH VCTL ICTC ICTD RCT 2.25 0.43 -2.9 0.23 7 2.8 0.5 -2.5 0.25 10 2.95 0.65 -2.2 0.32 13 V V A A VRF Limit current set to 1A when RF is 0.25. 0.225 0.25 0.275 V VFG When IO is 2mA 0.25 0.35 V VFRH VFRL Order of current application : UOUTVOUTWOUT Order of current application : UOUTWOUTVOUT 0 1 V 4 VREG V VMINSP2 4 VREG V VMINSP1 1 3 V VCTLON VCTLOFF 0 3.5 3 VREG V V IOSCC IOSCD -2.5 2.5 A A Ron (H) Ron (L) Ron (H+L) IO = 0.7A, VG = 17V IO = 0.7A, VCC = 12V IO = 0.7A, VCC = 12V, VG = 17V 0.6 0.6 1.2 1.0 1.0 2 VVREG 4.75 5 5.25 V VVG 17 V Symbol ICC1 Conditions min Ratings typ 3 max 4 mA Unit No.A1441-2/9 LV8804FV Package Dimensions unit : mm (typ) 3360 1.2 Pd max -- Ta Thermal resistance evaluation board Thermal resistance evaluation board : 76.1x114.3x1.6mm3 glass epoxy 5.2 20 Allowable power dissipation, Pd max -- W 1.0 0.95 0.8 4.4 6.4 12 0.5 (0.35) 1.5 MAX (1.3) 0.5 0.6 0.22 0.15 0.4 0.3 0.2 0.42 Independent IC 0.13 0 -30 -20 0 20 40 60 80 100 120 SANYO : SSOP20J(225mil) Pin Assignment SOFTST 1 FG 2 CT 3 OSC 4 GND 5 20 MINSP 19 CTL 18 F/R 17 VREG 16 FIL 0.1 Ambient temperature,Ta -- C LV8804FV VG 6 CP 7 CPC 8 RF 9 WO 10 Top view 15 COMIN 14 COM 13 VCC 12 UO 11 VO No.A1441-3/9 LV8804FV Block Diagram VCC FG CT VG CPO CP FG VREF CTL CTL VREG MINSP CTLAMP RD CTOSC CHARGE PUMP REFOSC VREG SENSORLESS LOGIC VREG F/R OSC START OSC PRI DRIVE FIL VCC COMIN SELECTOR COM UO VO WO COM CURR LIM RF GND SOFTST No.A1441-4/9 LV8804FV Pin Function Pin No. 1 Pin name SOFTST Function Soft start time setting. The motor can be started smoothly by connecting a capacitor between this pin and ground. VREG Equivalent circuit 500 1 2 FG FG pulse output. This pin outputs a Hall sensor system equivalent pulse signal. 2 3 CT Motor lockup detection time setting. 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. VREG 500 3 4 OSC Motor startup frequency setting. A capacitor must be connected between this pin and ground. The startup frequency is adjusted by controlling the charge/discharge current and capacitance of the capacitor. 500 VREG 4 500 5 6 GND VG GND pin. Charge pump step-up voltage output. A capacitor must be connected between this pin and the VCC pin or ground. VREG 7 VCC 8 6 7 CP Charge pump step-up pulse output pin. 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. Capacitors must be connected between these pins and ground. 13 12 11 10 9 UO VO WO Output pins. Connect these pins to the U, V, and W of the motor coil. 12 50k 11 50k 10 50k 9 RF 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. Pin No. 14 15 Pin name COM COMIN Function Motor middle point connection. Motor position detection comparator filter pin. A capacitor must be connected between this pin and the FIL pin (pin 16). 16 FIL Motor position detection comparator filter pin. A capacitor must be connected between this pin and the COMIN pin (pin 15). VG UO VO WO 50k 50k 50k Equivalent circuit 14 15 17 VREG Regulator voltage (5V) output. A capacitor must be connected between these pins and ground. VCC 16 17 VREG 18 F/R Motor rotation direction switching. A 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 turns the motor in the opposite direction. VREG Reverse signal 15k 18 100k Forward/reverse switching signal Forward signal 19 CTL Motor control voltage input. 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. VREG 20 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). 500 500 20 19 No.A1441-6/9 LV8804FV LV8804FV Functional Description 1. Control Characteristics IRF When RF = 0.25 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 0.25 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 Full speed The gradient changes in accordance with the capacitance of the SOFTST pin. (The higher the capacitance, the steeper the gradient.) Soft start SOFTS pin Stop Full speed No.A1441-7/9 LV8804FV Application Circuit Example *2 10F/25V 0.1F *9 VCC VG UO VO WO COM COMIN 0.01F *3 *9 0.1F CP CPC VREG 1F/10V 47k MINSP 47k 22k 68k 4,7k 10k 27k 1F *8 FIL FG RFG= 10k to 100k CTL F/R PWM CT SOFTST OSC GND *1 *5 1F *4 1F *6 1000pF *7 RF 0.25 *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 10F 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. SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. 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 |
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