Ordering number : EN8318 Monolithic Digital IC LB11660FV Single-Phase Full-Wave Fan Motor Driver Overview The LB11660FV is a single-phase bipolar drive half-predriver motor driver that can easily implement a direct PWM driver motor driver circuit with excellent efficiency. The LB11660FV is particularly well suited for the miniature fans used in servers. Features • Single-phase full-wave drive (15V, 1.5A transistors are built in) Half predriver with integrated high side transistor • Built-in variable speed function controlled by an external input The LB11660FV can implement quiet, low-vibration variable speed control using externally clocked high side transistor direct PWM drive. • Minimum speed setting pin • Current limiter circuit (The limit value is determined by Rf; IO = 1A when RF = 0.5Ω) • Built-in kickback absorption circuit • Soft switching circuit makes low current consumption, low loss, and low noise drive possible at phase switching • Built-in HB • Built-in lock protection and automatic recovery circuits (built-in on/off ratio switching circuit controlled by the supply voltage) • FG (speed detection) output • Built-in thermal protection circuit (design guarantee) 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. 41107 TI PC B8-8730 No.8318-1/8 LB11660FV Specifications Absolute Maximum Ratings at Ta = 25°C Parameter VCC maximum supply voltage Symbol Ratings Unit 20 V VM max 20 V VM maximum supply voltage OUT pin maximum output Conditions VCC max Rf ≥ 0.39Ω IOUT max 1.5 current A OUT pin output voltage 1 VOUT max 1 OUT pin output voltage 2 VOUT max 2 PRE pin maximum source IPSO max 30 mA IPSI max -7 mA PRE pin output voltage VP max 20 V HB maximum output current HB max 10 mA VTH input pin voltage VTH max 7 V FG output pin voltage VFG max 18 V FG output current IFG max 10 mA Allowable power dissipation Pd max 20 T ≤ 0.4μs 26.5 V V current PRE pin maximum sink current Operating temperature Topr Storage temperature Tstg *1 Specified circuit board : 114.3 × 76.1 × 1.6mm3, When mounted on a circuit board *1 *2 0.8 W -30 to +90 °C -55 to +150 °C glass epoxy. *2: Tj max is 150°C. This device must be used under conditions such that the chip temperature does not exceed Tj = 150°C during operation. Recommended Operating Conditions at Ta = 25°C Parameter Symbol VCC supply voltage VCC VM supply voltage Conditions Ratings Unit 4 to 15 V VM 3 to 15 V Current limiter operation range ILIM 0.6 to 1.2 V VTH input level voltage range VTH 0 to 6 V Hall sensor input common-mode VICM 0.2 to 3 V input voltage range Electrical Characteristics Unless otherwise specified Ta = 25°C, VCC = 12V Parameter Symbol Ratings Conditions min typ Unit max Circuit current ICC1 Drive mode 9 12 HB voltage VHB IHB = 5mA 1.05 1.25 1.40 V 6VREG = 5mA 5.80 6 6.20 V 3.4 3.6 3.8 V 6VREG voltage CT pin high-level voltage V6VREG VCTH mA CT pin low-level voltage VCTL 1.4 1.6 1.8 V ICT pin charge current 1 ICTC1 VCC = 12V 1.7 2.2 2.7 μA ICT pin charge current 2 ICTC2 VCC = 6V 1.3 1.8 2.3 μA ICT pin discharge current 1 ICTD1 VCC = 12V 0.11 0.15 0.19 μA ICT pin discharge current 2 ICTD2 VCC = 6V 0.34 0.44 0.54 ICT charge/discharge current RCT1 VCC = 12V 12 15 18 Times RCT2 VCC = 6V 3 4 5 Times VRCT 6 6.6 7.3 V IBVTH -2 -1 0 μA 0.6 0.8 V μA ratio 1 ICT charge/discharge current ratio 2 ICT charge/discharge ratio threshold voltage VTH bias current OUT output high saturation VOH IO = 200mA, RL = 1Ω voltage Continued on next page. No.8318-2/8 LB11660FV Continued from preceding page. Parameter Symbol Ratings Conditions min PRE output low saturation Unit typ max VPL IO = 5mA 0.2 0.4 V VPH IO = -20mA 0.9 1.2 V VRf VCC - VM voltage PRE output high saturation voltage Current limiter 450 500 550 mV VPWMH 2.2 2.5 2.8 V VPWML 0.4 0.5 0.7 V PWM external C charge current IPWM1 -23 -18 -14 μA PWM external C discharge IPWM2 18 24 30 μA PWM output pin high-level voltage PWM output pin low-level voltage current PWM oscillator frequency FPWM Hall sensor input sensitivity C = 200pF VHN 19 Zero peak value (including offset and 23 27 kHz 15 25 mV 0.2 0.3 V 30 μA 210 °C hysteresis) FG output pin low-level voltage VFG/RD IFG/RD = 5mA FG output pin leakage current IFGL/IRDL VFG/RD = 7V Thermal protection circuit THD Design target value*3 150 180 *3: This is a design guarantee and is not tested in individual units. The thermal protection circuit is included to prevent any thermal damage to the IC. Since this would imply operation outside the IC's guaranteed temperature range, the application thermal design must be such that the thermal protection circuit will not operate if the fan is operating constantly. Package Dimensions Pin Assignment unit : mm (typ) 3178B 5.2 16 OUT1 OUT2 2 15 PRE1 PRE2 3 14 GND 13 6VREG VTH 5 12 CT RMI 6 11 IN- CPWM 7 10 HB FG 8 9 IN+ 6.4 9 VCC 4 0.5 4.4 16 VM 1 1 8 0.65 (0.33) LB11660FV 0.15 0.1 (1.3) 1.5max 0.22 Top view SANYO : SSOP16(225mil) Truth Table IN- IN+ High Low Low High High Low Low High High Low Low High VTH Low CPWM CT High Low High - Low - High OUT1 OUT2 PRE1 PRE2 FG High Off Low High Low Off High High Low Off Mode During rotation − drive Off Off Low High Low During rotation − Off Off High Low Off regeneration Off Off Low High Low Off Off High Low Off Lock protection CPWM – High is the state where CPWM > VTH, and CPWM– Low is the state where CPWM < VTH. No.8318-3/8 LB11660FV Application Circuit Example 1 Rf *4 *2 VCC CM = 4.7μF or more VM HB H IN*5 *7 IN+ FG 6VREG R3 OUT2 *9 RMI OUT1 R4 *3 Control valtage PRE1 VTH PRE2 CPWM CP = 200pF *f = 23kHz CP = 100pF *f = 46kHz *6 *1 CT CT = 0.47 to 1μF GND *1. Power supply and ground lines The IC ground is the control current power supply system ground, and the external n-channel transistor ground is the motor power supply system ground. These two systems should be formed from separate lines and the control system external components should be connected to the IC ground. *2. Regeneration power supply stabilization capacitor Use a 4.7µF/25V capacitor at least for CM, which is the power supply stabilization capacitor for both PWM drive and kickback absorption. The capacitor CM must be connected to prevent destruction of the IC when power is applied or removed. *3. Speed Control (1) Control voltage The PWM duty is determined by comparing the VTH pin voltage with the PWM oscillator waveform. When the VTH voltage falls, the on duty increases and when the VTH voltage falls below the PWM output low level, the duty will go to 100%. (2) Thermistor For thermistor applications, normally the 6VREG level will be resistor divided and the divided level input to the VTH pin. The PWM duty is changed by changes in the VTH pin voltage due to changes in temperature. *4. Current limiter setting The current limiter circuit operates if the voltage across the resistor between VCC and the VM pin exceeds 0.5V. Since the current limiter circuit applies limitation at a current determined by IO = VRf/Rf (where VRf = 0.5V (typical), Rf: resistance of the current detection resistor), the current limiter will operate at IO = 1A when Rf = 0.5Ω. The resistor RF must be connected in the circuit and it must have a value such that the circuit operates within the recommended current limiter operating range. No.8318-4/8 LB11660FV *5. Hall sensor input Lines that are as short as possible must be used to prevent noise from entering the system. The Hall sensor input circuit consists of a comparator with hysteresis (20mV). We recommend that the Hall sensor input level be at least three times this hysteresis, i.e. at least 60mVp-p. *6. PWM oscillator frequency setting capacitor The PWM oscillator oscillates at f = 23kHz when CP is 200pF and at f = 46kHz when CP is 100pF, and this frequency becomes the PWM reference frequency. Note that the PWM frequency is given approximately by the following equation. f [kHz] ≈ (4.6×106) ÷C [pF] *7. FG output This is an open collector output, and a rotation count detection function can be implemented using this FG output, which corresponds to the phase switching. This pin must be left open if unused. *8. HB pin This pin provides a Hall effect sensor bias constant-voltage output of 1.25V. *9. RMI pin This pin is the speed control minimum speed setting. The minimum output duty is set by R3 and R4. Leave R4 open to have the motor stop when the duty is 0%. Rotation Control Timing Chart Duty 100% PWM duty(%) Minimum output duty Duty 0% RMI VPWML VPWMH VTH(V) Minimum speed setting rotation PWM control variable speed mode Full speed mode VTH voltage 2.5V RMI voltage CPWM 0.5V 0V ON On duty OFF No.8318-5/8 LB11660FV Application Circuit Example 2 SANYO mounting circuit board (Component values are provided for reference purposes) D1 R1 C1 VCC R5 VM HB IN- H IN+ FG 6VREG C2 R3 OUT2 RMI OUT1 R4 Q1 R2 Control voltage PRE1 VTH Q2 C3 PRE2 (C6) CPWM (C7) C4 CT C5 GND Parts List D1 : SBM30-03-Tr (SANYO) Q1, 2 : CPH3418 (SANYO) R1 : 0.51Ω size 3225 R2 : 15kΩ size 1608 R3 : 39kΩ size 1608 R4 : 20kΩ size 1608 R5 : 2.2Ω size 1608 C1 : 4.7μF/25V size 3216 C2 : 2.2μF size 1608 C3 : 2.2μF size 1608 C4 : 220pF size 1005 C5 : 0.47μF size 1608 C6, 7 : No connection No.8318-6/8 LB11660FV Application Circuit Example 3 No minimum speed setting, thermistor input used RL VCC CM=4.7μF or more *8 H VM HB IN- *5 IN+ FG 6VREG R3 OUT2 RMI OUT1 RTU PRE1 VTH TH CP = 200pF *f = 23kHz CP = 100pF *f = 43kHz PRE2 CPWM CT CT = 0.47 to 1μF GND No.8318-7/8 LB11660FV Internal Equivalent Circuit Diagram FG Thermal protection circuit VCC VM Constant voltage Delay circuit 6VREG OUT2 HB HALL Control circuit 1.25V OUT1 M IN+ Delay circuit Predriver Predriver INAmplifier with hysteresis Charge/discharge circuit GND CT RMI PRE1 PRE2 Oscillator circuit VTH CPWM 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, 2007. Specifications and information herein are subject to change without notice. PS No.8318-8/8