Ordering number : ENA2028 LA6581MC Monolithic Linear IC Fan Motor Driver BTL Driver Single-Phase Full-Wave http://onsemi.com Overview The LA6581MC is a low-saturation BTL output linear driving motor driver for single-phase bipolar fan motors. It features quite, low power, high efficiency drive that suppresses reactive current. It is optimal for use in applications that require miniaturization and low noise, such as CPU cooling fan motors and 5 to 12V electronic game products. Functions • Single-phase full-wave linear drive with BTL output (gain resistance 500Ω to 284kΩ, 55dB) : Suitable for the equipment requiring silent operation, such as game equipment, CPU cooler, etc. because of its freedom from switching noise. • Low-voltage operation possible, with wide operable voltage range (3 to 16V) • Low saturation output (Upper + lower saturation voltage : VOsat (total) = 0.3V typ, IO = 100mA) : High coil efficiency with low current drain. IC itself does not generate much heat. • High impedance of Hall input pin • FG output (rotation speed detection output : open collector output) • Heat protection circuit : When the large current flows because of output short-circuit, raising the IC chip temperature above 180°C, the heat protection circuit suppresses the drive current, preventing IC burn and breakdown. Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Supply voltage VCC max OUT output current IOUT1 max IOUT2 max Conditions T<200ms Ratings Unit 18 V 0.40 A 0.50 A V OUT output withstand voltage VOUT max 18 FG output withstand VFG max 18 V FG output current IFG max 5 mA Allowable power dissipation Pd max Mounted on a specified board *1 750 mW Operating temperature Topr *2 Storage temperature Tstg -30 to +100 °C -55 to +150 °C *1: Specified board: 114.3mm × 76.1mm ×1.6mm, glass epoxy board *2: Tj = 150°C max must not be exceeded. 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 42512 SY 20120222-S00005 No.A2028-1/4 LA6581MC Recommended Operating Conditions at Ta = 25°C Parameter Symbol Supply voltage VCC Common-phase input voltage range of VICM Conditions Ratings Unit 2.2 to 16 V 0.3 to VCC-1.5 V Hall input Electrical Characteristics at Ta = 25°C, VCC = 12.0V, unless especially specified. Parameter Symbol Ratings Conditions min Unit Typ Max Circuit Current ICC IN- = 5.8V, IN+ = 6.0V, RL = ∞ 14 19 mA OUT output low voltage VOL IO = 100mA 0.1 0.2 V OUT output high voltage VOH IO = 100mA 0.1 0.2 V Hall bias voltage VHB RH = 360Ω +91Ω 1.85 1.95 2.05 V 52 55 58 dB -10 -2 +10 μA 0.2 0.3 V 30 μA 180 200 °C Hall amplifier gain Vg Hall amplifier input current VINR FG output low voltage VFG IFG = 3mA FG output leakage current IFGL VFG = 7V Thermal protection circuit Th * Design guarantee 150 *: These values are design guarantee values, and are not tested. Truth Table IN- IN+ OUT1 H L H L L L H L H Off - - Off Off - OUT2 FG mode During rotation During overheat protection Package Dimensions unit : mm (typ) 3424 4.9 0.2 Allowable power dissipation, Pd max -- mW 0.835 0.375 6.0 3.9 0.42 1.75 MAX 1.27 2 Spesified board: 114.3×76.1×1.6mm3 glass epoxy board. 800 750 600 400 300 200 0 -30 0.175 1 Pd max -- Ta 1000 8 0 30 60 90 120 Ambient temperature, Ta -- C SANYO : SOIC8 No.A2028-2/4 LA6581MC Pin Assignment IN+ 1 8 FG 7 VCC HB 2 LA6581MC 6 OUT2 3 5 GND OUT1 4 Top view Block Diagram VCC FG 2.0VRG HB IN+ H OUT1 OUT2 IN- GND Timing Chart Hall Signal OUTPUT Coil Current FG Pulse No.A2028-3/4 LA6581MC Application Circuit Example Di Cr *4 VCC *1 R2 LA6581MC *2 HB FG HB H *3 H OUT1 IN+ IN+ OUT2 *5 R2 GND R1 Elements in substrate *1 : When Di to prevent breakdown in case of reverse connection is used, it is necessary to insert a capacitor Cr to secure the regenerative current route. Similarly, Cr is necessary to enhance the reliability when there is no capacitor near the fan power line. *2 : To obtain Hall bias from VCC, carry out 1/2 × VCC bias as shown in the figure. Linear driving is made through voltage control of the coil by amplifying the Hall output. When the Hall element output is large, the startup performance and efficiency are improved. Adjustment of the Hall element can reduce the noise further. *3 : When the Hall bias is taken from the HB pin, constant-voltage bias is made with about 2.0V. Therefore, the Hall element can provide the output satisfactory in temperature characteristics. Adjustment of the Hall output amplitude is made with R1. (When VCC = 12V, the step *2 above proves advantageous for IC heat generation.) *4 : Keep this open when not used. *5 : When the wiring from the Hall output to IC Hall input is long, noise may be carried through the wiring. 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Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. No.A2028-4/4