Ordering number : ENA1772 Monolithic Digital IC LB11685AV 3-phase sensor less Motor driver Overview The LB11685AV is a three-phase full-wave current-linear-drive motor driver IC. It adopts a sensor less control system without the use of a Hall Effect device. For quieter operation, the LB11685AV features a current soft switching circuit and be optimal for driving the cooling fan motors used in refrigerators, etc. Functions • Three-phase full-wave linear drive (Hall sensor-less method ) • Built-in three-phase output voltage control circuit • Built-in current limiter circuit • Built-in motor lock protection circuit • Motor lock protection detection output • FG output made by back EMF • Built-in thermal shut down circuit • Beat lock prevention circuit Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions VCC max Input applied voltage VIN max Maximum output current IO max *1 Allowable power dissipation Pd max Operating temperature Storage temperature Junction temperature Tj max Ratings Unit 19 V -0.3 to VCC +0.3 V 1.2 A 1.05 W Topr -40 to 85 °C Tstg -55 to 150 °C 150 °C Mounted on a board *2 *1: The IO is a peak value of motor-current. *2: Specified board: 76.1mm × 114.3mm × 1.6mm, glass epoxy board. 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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. 61610 SY 20100604-S00001 No.A1772-1/7 LB11685AV Recommended Operating Conditions at Ta = 25°C Parameter Symbol Recommended Supply voltage VCC Operating supply voltage VCC op Conditions Ratings Unit 12.0 V 4.5 or 18.0 V Electrical Characteristics at Ta = 25°C, VCC = 5.0V Parameter Symbol Ratings Conditions min Supply current ICC FC1 = FC2 = 0V Internal regulate voltage VREG Output voltage (source) VOSOUR IO = 0.8A *3 Output voltage (sink) VOSINK IO = 0.8A *3 Current limiter VOLIM MCOM pin VINCOM typ 5 3.0 Unit max 10 20 mA 3.3 3.6 V 1.3 1.7 V 0.5 1.3 V 0.300 0.332 V 0 VCC - 2 V 0.268 common-input voltage range ICOM+ MCOM = 7V 30 80 μA ICOM- MCOM = 7V 30 80 μA RTCOM RTCOM = ICOM+ / ICOM- 0.6 1.4 VCO input bias current IVCO VCO = 2.3V VCO oscillation minimum fVCOmin VCO = 2.1V, CX = 0.015μF Design target *2 930 Hz fVCOmax VCO = 2.7V, CX = 0.015μF 8.6 kHz MCOM pin Source current for hysteresis MCOM pin Sink current for hysteresis MCOM pin hysteresis current ratio frequency VCO oscillation maximum frequency 0.2 μA Design target *2 CX charge / discharge current ICX CX hysteresis voltage ΔVCX VCO = 2.5V, CX = 1.6V C1 (C2) charge current IC1(2)+ VCO = 2.5V, C1(2) = 1.3V C1 (C2) discharge current IC1(2)- VCO = 2.5V, C1(2) = 1.3V 12 C1 (C2) charge / discharge RTC1(2) RTC1(2) = IC1(2)+ / IC1(2)- 0.8 μA 70 100 140 0.35 0.55 0.75 12 20 28 μA 20 28 μA 1.0 1.2 current ratio C1/C2 charge current ratio RTCCHG RTCCHG = IC1+ / IC2+ 0.8 1.0 1.2 C1/C2 discharge current ratio RTCDIS RTCDIS = IC1- / IC2- 0.8 1.0 1.2 C1 (C2) cramp voltage width VCW1(2) 1.0 1.3 1.6 V V FG output low level voltage VFGL IFG = 3mA 0.5 RD output low level voltage VRDL IRD = 3mA 0.5 Thermal shut down operating TTSD Junction temperature ΔTTSD Junction temperature temperature *1 Thermal shut down hysteresis 150 v 180 °C 15 °C Design target *2 temperature *1 Design target *2 *1: The thermal shut down circuit is built-in for protection from damage of IC. But its operation is out of Topr. Design thermal calculation at normal operation. *2: Design target value and no measurement is made. *3: The IO is a peak value of motor-current. No.A1772-2/7 LB11685AV Package Dimensions unit : mm (typ) 3315 Pd max - Ta 0.5 5.6 13 7.6 24 1 12 0.8 0.15 0.3 1.5MAX (1.3) (0.48) Allowable power dissipation, Pd max -- W 1.5 9.75 Specified circuit board : 114.3 ×76.1× 1.6mm3 glass epoxy board 1.05 1.0 0.55 0.5 -20 0 20 40 60 80 100 Ambient temperature, Ta -- C 0.1 0 -40 SANYO : SSOP24J(275mil) Pin Assignment UOUT 1 24 VOUT (NC) 2 23 WOUT (NC) 3 22 (NC) PGND 4 21 (NC) MCOM 5 20 RF (NC) 6 19 VCC SGND 7 18 REG FG 8 17 VOH RD 9 16 FC1 (NC) 10 15 FC2 VCO 11 14 C2 CX 12 13 C1 No.A1772-3/7 LB11685AV Block Diagram 1 24 2 23 3 22 Pre Drive Distributor 4 21 Output Switching Control 5 Start Up & Mask Timing 6 Reference Voltage 20 Bandgap 19 + 7 Power On Reset 18 TSD 8 Motor Lock Detector 9 FG 17 Torque Ripple Rejection & Current Limit 10 15 PLL Low Voltage Control 14 11 VCO 12 16 Soft Switching 13 No.A1772-4/7 LB11685AV Pin Function Pin No. Pin name 1 UOUT 23 WOUT 24 VOUT 4 PGND Function Equivalent circuit Each output pin of three phases. Pin No.20 GND pin in the output part. This pin is connected to GND. The SGND pin is also Pin No.1,23,24 connected to GND 20 RF Pin to detect output current. By connecting a resistor between this pin and VCC, the Pin No.4 output current is detected as a voltage. The current limiter is operated by this voltage. 5 MCOM Motor coil midpoint input pin. The coil voltage waveform is detected based on this voltage. SGND SGND SGND VCC VCC Pin No.5 SGND 7 SGND SGND Ground pin (except the output part) This pin is connected to GND. The PGND pin is also connected to GND. 8 FG FG out made by back EMF pin. It synchronizes FG out with inverted V-phase. Pin No.8 No.9 When don’t use this function, open this pin. 9 RD Motor lock protection detection output pin. SGND Output with L during rotation of motor. SGND Open during lock protection of motor (High-impedance). When don’t use this function, open this pin. 11 VCO PLL output pin and VCO input pin. To stabilize PLL output, connect a capacitor between this VREG pin and GND. VCC Pin No.11 VREG SGND VREG SGND 12 CX VCO oscillation output pin. Operation frequency range and minimum frequency are VREG determined by the capacity of the capacitor connected to this pin. VCC Pin No.12 SGND SGND Continue to the next page. No.A1772-5/7 LB11685AV Continue from the former page. Pin No. Pin name Function 13 C1 Soft switching adjustment pin. 14 C2 The triangular wave from is form formed by connecting a Equivalent circuit capacitor with this pin. VCC And, the switching of three-phase output is adjusted by the slope. Pin No.13 14 SGND SGND 15 FC2 Frequency characteristic correction pin 2. VREG To suppress the oscillation of control system closed loop of sink-side, connect a capacitor between this pin and VCC GND. Pin No.15 SGND SGND 16 FC1 Frequency characteristic correction pin 1. VCC To suppress the oscillation of control system closed loop of source-side, connect a capacitor between this pin and Pin No.16 GND. SGND SGND 17 VOH Three-phase output high level output pin. VCC To stabilize the output voltage of this pin, connect a capacitor between this pin and the VCC pin. VCC Pin No.17 SGND SGND 18 VREG DC voltage (3.3V) output pin. VCC Connect a capacitor between this pin and GND for VCC stabilization. Pin No.18 SGND SGND 19 VCC Pin to supply power-supply voltage. To curb the influence of ripple and noise. The voltage should be stabilized. No.A1772-6/7 LB11685AV Application Circuit Example * Each fixed number in the following FIG, is the referential value. FAN MOTOR 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC 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. 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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 June, 2010. Specifications and information herein are subject to change without notice. PS No.A1772-7/7