Ordering number : EN6202A LB1868 Monolithic Digital IC 2-phase Brushless http://onsemi.com Fan Motor Driver Overview The LB1868 is a 2-phase unipolar brushless motor driver. With only a few peripheral parts, lockup protection and automatic recovery can be implemented. The IC can be configured for 12V or 24V operation and a wide range of variations, from Low speed to H-High speed and from 60cm to 120cm square using the same PCB. This makes it easy to design highly reliable fan motor installations. Features • Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification) Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener diode connected across Z1 − VCC pins: support for fans with large drive current • External resistor allows configuration for 12V or 24V • Direct Hall element connection possible (built-in Hall amplifier with hysteresis supports core without auxiliary electrode) • Built-in output transistor with 1.0A output current (strengthened negative-current support for core without auxiliary electrode) • Built-in rotation detection function: Low during rotation and High during stop • Built-in lockup protection with automatic recovery • Built-in thermal shutdown Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions t ≤ 20ms Ratings Unit Maximum input current ICC max 200 Maximum applied output voltage VOUT max Maximum output current IOUT max 1.0 A Maximum current flowing into RD pin IRD max 10 mA Maximum RD applied voltage VRD max 30 V Allowable power dissipation Pd max 1.1 W Operating temperature Topr -30 to +95 °C Storage temperature Tstg -55 to +150 °C Internal mA V 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 31109 MS 20080725-S00003 / 83100RM(KI) No.6202-1/5 LB1868 Allowable Operating Ranges at Ta = 25°C Parameter Symbol Input current range ICC Common mode input voltage range VICM Conditions Ratings Unit 6.0 to 50 mA 0.2 to VIN-1.5 V Electrical Characteristics at Ta = 25°C, ICC = 10mA Parameter Symbol Ratings Conditions min Output limiter withstand voltage VOLM1 Output saturation voltage Z1, Z2 open 54 VOLM2 Z1, Z2 short 31 VOsat1 IO = 0.5A VOsat2 IO = 1.0A VIN ICC = 7.0mA Hall input sensitivity (at zero peak) VHN Including offset and hysteresis RD output saturation voltage VRDsat IRD = 5mA CT drain current IC1 C = GND 2.7 CT discharge current IC2 C = VIN Comp input threshold voltage VTH1 VTH2 VIN voltage Thermal protection operating Unit typ max 57 60 V 33 35 V 0.95 1.2 V 1.15 1.5 V 6.7 7.0 V 20 mV 0.1 0.3 V 3.8 4.9 μA 0.19 0.30 0.41 μA 0.77 0.8VIN 0.83 V 0.42 0.45VIN 0.48 V 6.4 TSD Design target value * 180 °C ΔTSD Design target value * 40 °C temperature Thermal protection circuit hysteresis * Design target value, Do not measurement. Package Dimensions unit : mm (typ) 3098D Pd max -- Ta 9.14 7.62 6 1 5 (3.0) 3.2 3.9 MAX 0.95 0.25 6.4 10 Allowable power dissipation, Pd max -- W 1.2 1.1 1.0 0.8 0.6 0.48 0.4 0.2 0 -30 -20 20 40 60 80 95 100 Ambient temperature, Ta -- °C 0.51 MIN (1.01) 0 1.78 0.48 SANYO : DIP10S(300mil) No.6202-2/5 LB1868 Pin Assignment 10 VIN IN+ 2 9 RD LB1868 IN− 1 CT 3 OUT1 4 8 Z2 7 Z1 GND 5 6 OUT2 Top view Pin Function Pin No. Pin name Function 1 IN− Hall input + pin. Hysteresis amplifier 2 IN+ Hall input − pin. Hysteresis amplifier 3 CT Lockup protection time setting capacitor pin (0.47 to 4.7μF). 4 OUT1 Output 1 pin. 6 OUT2 Output 2 pin. 5 GND GND pin. 7 Z1 External Zener diode pin (external Zener diode to be connected between power supply and Z1). 8 Z2 Kickback absorption voltage alteration pin (shorted to Z1: 12V operation). 9 RD Lockup detection pin (latch type). 10 VIN Regulated power supply input pin (limiting resistor to be inserted between power supply and VIN). Truth Table IN+ IN− CT OUT1 OUT2 RD H L L H L L L H L L H L H L H H H H L H H H H H * RD is a latch type output No.6202-3/5 LB1868 Block Diagram VIN VCC L1 Thermal shutdown R1 L2 OUT1 R2 IN+ H IN− Control block Z1 Constant current source Z2 OUT2 CT RD C1 GND 0.47 to 10μF Application Circuit Example (1) 12V supply voltage VCC 12V 330Ω 10 VIN 2kΩ 9 RD 8 Z2 7 Z1 6 OUT2 OUT1 4 GND LB1868 IN− 1 H IN+ 2 CT 3 5 0.47μF No.6202-4/5 LB1868 (2) 24V supply voltage VCC 24V 1.2kΩ 10 VIN 2kΩ 9 RD 8 Z2 7 Z1 6 OUT2 OUT1 4 GND LB1868 IN− 1 IN+ 2 CT 3 H 5 0.47μF (3) High-Power Fan (120mm-HH-Speed) VCC 12V (24V) 330Ω (1.2kΩ) 10 VIN 2kΩ VZ=12V (24V) 9 RD 8 Z2 7 Z1 6 OUT2 OUT1 4 GND LB1868 IN− 1 H IN+ 2 CT 3 5 0.47μF ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.6202-5/5