Ordering number : ENA1773A LB11685VH Monolithic Digital IC 3-phase sensor less Motor driver http://onsemi.com Overview The LB11685VH 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 LB11685VH 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 • Motor lock protection detection output • Built-in thermal shut down circuit • Built-in current limiter circuit • Built-in motor lock protection circuit • FG output made by back EMF • 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 Ratings Unit 19 V -0.3 to VCC +0.3 V 1.2 A 1.4 W Topr -40 to 85 °C Tstg -55 to 150 °C 150 °C Junction temperature Tj max *1: The IO is a peak value of motor-current. Mounted on a board *2 *2: Specified board: 76.1mm × 114.3mm × 1.6mm, glass epoxy board. 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 71812 SY/61610 SY 20100604-S00002 No.A1773-1/7 LB11685VH 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 to 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 Design target *2 8.6 kHz CX charge / discharge current ICX VCO = 2.5V, CX = 1.6V CX hysteresis voltage ΔVCX 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 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 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.A1773-2/7 LB11685VH Package Dimensions unit : mm (typ) 3222A 0.5 5.6 7.6 15 14 1 2.0 0.2 (1.5) 1.7max 0.3 (0.7) 0.1 2.7 Allowable power dissipation, Pd max -- W 28 0.8 Pd max - Ta 2.0 15.0 Specified circuit board : 114.3 ×76.1 × 1.6mm3 glass epoxy board 1.5 1.40 1.0 0.73 0.5 0 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- C SANYO : HSOP28(275mil) Pin Assignment CX 1 28 (NC) C1 2 27 VCO C2 3 26 (NC) FC2 4 25 RD FC1 5 24 (NC) VOH 6 23 FG REG 7 22 SGND VCC 8 21 MCOM RF 9 20 PGND (NC) 10 19 (NC) (NC) 11 18 (NC) WOUT 12 17 (NC) (NC) 13 16 UOUT VOUT 14 15 (NC) No.A1773-3/7 LB11685VH Block Diagram 28 1 2 3 Soft Switching VCO Low Voltage Control 26 PLL 4 5 27 25 Torque Ripple Rejection & Current Limit FG 24 23 6 7 Motor Lock Detector 22 TSD Power On Reset + - Bandgap 8 Reference Voltage Start Up & Mask Timing 21 Output Switching Control 9 20 10 Distributor 19 11 Pre Drive 18 12 17 13 16 14 15 No.A1773-4/7 LB11685VH Pin Function Pin No. Pin name 16 UOUT 12 WOUT 14 VOUT 20 PGND Function Equivalent circuit Each output pin of three phases. Pin No.9 GND pin in the output part. This pin is connected to GND. The SGND pin is also Pin No.16,14,12 connected to GND 9 RF Pin to detect output current. By connecting a resistor between this pin and VCC, the Pin No.20 output current is detected as a voltage. The current limiter is operated by this voltage. 21 MCOM Motor coil midpoint input pin. The coil voltage waveform is detected based on this voltage. SGND SGND SGND VCC VCC Pin No.21 SGND 22 SGND SGND Ground pin (except the output part) This pin is connected to GND. The PGND pin is also connected to GND. 23 FG FG out made by back EMF pin. It synchronizes FG out with inverted V-phase. When don’t use this function, open this pin. 25 RD Pin No.23 No.25 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. 27 VCO PLL output pin and VCO input pin. To stabilize PLL output, connect a capacitor between this VREG pin and GND. VCC Pin No.27 VREG SGND VREG SGND 1 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.1 SGND SGND Continue to the next page. No.A1773-5/7 LB11685VH Continue from the former page. Pin No. Pin name Function 2 C1 Soft switching adjustment pin. 3 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.2 3 SGND SGND 4 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 GND. VCC Pin No.4 SGND SGND 5 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.5 GND. SGND SGND 6 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.6 SGND SGND 7 VREG DC voltage (3.3V) output pin. VCC Connect a capacitor between this pin and GND for VCC stabilization. Pin No.7 SGND SGND 19 VCC Pin to supply power-supply voltage. To curb the influence of ripple and noise. The voltage should be stabilized. No.A1773-6/7 LB11685VH Application Circuit Example * Each fixed number in the following FIG, is the referential value. VCC 1 28 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 VDD VDD FAN MOTOR ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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