Ordering number : ENA2078 LB1960MC Monolithic Digital IC For Fan Motor http://onsemi.com 2-phase Half-Wave Driver Overview The LB1960MC is a 2-phase half-wave driver for fan motor. The LB1960MC is a compact package. Low external parts count, easy wiring, and small PCB area allow use also with miniature fan motors. Functions • Dual power supply voltage design (5/12V) and wide voltage handling range. (3V also supported for rotation functions only) • Constant-voltage Hall bias power supply (1.3V across HB to GND) assures stable Hall output over entire temperature and power supply voltage range. External limiting resistor not required. • Built-in Hall amplifier with hysteresis (supports core without commutating pole). • Built-in lockup protection and automatic recovery circuits (External capacitor for rotation detection need only be 0.1μF, allowing compact, cost-saving design). • Built-in output transistor with output withstand voltage 24V (max)/output current 500mA (average), 1A (peak). • Built-in thermal protection circuit. Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 18 V Maximum output current IOUT ave 500 mA 1000 mA IOUT peak Maximum output voltage t ≤ 1ms VOUT max Internal V Maximum HB output current IH max Allowable power dissipation Pd max Operating temperature Topr -30 to +85 °C Storage temperature Tstg -55 to +150 °C Mounted on a specified board * 10 mA 750 mW * Specified board: 114.3mm × 76.1mm × 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 70412 SY 20120417-S00001 No.A2078-1/4 LB1960MC Allowable Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Recommended supply voltage VCC 3.6 to 17 V Common mode input voltage range VCOM 0.2 to HB V Electrical Characteristics at Ta = 25°C, VCC = 12V Parameter Symbol Ratings Conditions min Circuit current ICC CT capacitor charge current ICT1 VCT = 0.2V Capacitor discharge current ICT2 VCT = 8V Capacitor charge/discharge current RCT RCT = ICT1/ICT2 typ In drive mode (CT = L) Unit max 2.3 In lockup protection mode (CT = H) 4 mA 3 5 mA 0.8 1.2 2.0 μA 0.16 0.24 0.4 μA 4.0 5.0 7.0 ratio CT charge voltage VCT1 6.8 7.2 7.6 V CT discharge voltage VCT2 1.4 1.6 1.8 V 22.5 23.5 24.5 V 1.0 1.3 V 6 12 mV Output limiter withstand voltage VOLM IO = 1mA Output saturation voltage VOsat IO = 50mA Hall input sensitivity VHN Including offset and hysteresis HB output H voltage VHBH RH = 350Ω 1.1 1.3 1.5 V Thermal protection trigger TSD Assured design target * 180 180 210 °C temperature * Assured design target: Target value, not measured individually. Package Dimensions unit : mm (typ) 3424 4.9 8 0.2 Allowable power dissipation, Pd max -- mW 0.835 0.375 6.0 3.9 0.42 1.75 MAX 1.27 2 Specified board: 114.3×76.1×1.6mm3 glass epoxy board. 800 600 400 390 200 0 -30 0.175 1 Pd max -- Ta 1000 0 30 60 90 120 Ambient temperature, Ta -- °C SANYO : SOIC8 No.A2078-2/4 LB1960MC Pin Assignment LB1960MC IN+ 1 HB+ 2 IN− 3 8 VCC 7 CT 6 OUT2 5 GND OUT1 4 Top view Block Diagram VCC HB+ IN+ H IN− L1 Thermal protection circuit 8 Constant voltage output circuit 2 1 4 L2 OUT1 Control Block 3 6 OUT2 Constant current source CT 7 C1 0.1 to 1μF 5 GND Truth Table IN- IN+ H L L H - - CT L H OUT1 OUT2 L H H L OFF OFF Mode Rotating Lock-up protection activated No.A2078-3/4 LB1960MC Application Circuit Example 5/12V power supply (3.8 to 18V) VCC HB+ RH OUT1 H IN+ IN− OUT2 CT 0.1μF GND On-board parts Precautions • If CT pin is connected to GND, the lockup protection and restart functions are disabled. • In a circuit configuration as shown above, a power supply/GND reverse connection will cause a current to flow as follows: GND → OUT → coil → power supply. The value of this current is limited by the coil resistance. If it is less than 500mA, the IC will not be destroyed. If required, insert a diode between VCC and the coil. 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. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.A2078-4/4