Ordering number : ENA2044 LA6587FA Monolithic Linear IC Fan Motor Driver http://onsemi.com BTL Driver Single-Phase Full-Wave Overview The LA6587FA is single-phase bipolar fan motor is driven, through BTL output linear drive, at high efficiency, low power, and low sound by suppressing the reactive power. Lock protection, rotary signal (FG, 1/2FG) circuits are incorporated, which is optimum for the notebook PC, consumer equipment power supply, car audio system, CPU cooler, etc. that require high reliability and low noise. Functions • Single-phase full-wave linear drive by BTL output (gain resistance 1kΩ-360kΩ, 51dB) : No switching noise, which is optimum for equipment requiring silence, such as consumer equipment power supply, car audio system, etc. • Low-voltage operation possible, with wide operating voltage range (2.2 to 14.0V) • Low saturation output (Upper + lower saturation voltage : VOsat (total) = 1.1Vtyp, IO = 100mA) : High coil efficiency with low current drain. Additionally, IC itself generates only small heat. • Built-in lock protection and automatic reset circuits • Built-in FG & 1/2FG outputs • Built-in Hall bias (VHB = 1.5V) • Thermal protection circuit : When the large current flows due to output short-circuit and the IC chip temperature exceeds 180°C, this protective circuit suppresses the drive current to prevent burn and damage to IC. • Extra-small package (Micro10) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Output voltage Allowable power dissipation Symbol Conditions VCC max Pd max Mounted on a specified board* Ratings Unit 15 V 400 mW Output current IOUT max 0.6 A Output withstand voltage VOUT max 15 V RD/FG output pin output VRD/FG max 15 V IRD/FG max 10 mA withstand voltage RD/FG output current HB output current 10 mA Operating temperature IB max Topr -30 to +90 °C Storage temperature Tstg -55 to +150 °C * Mounted on a specified board : 20mm×10mm×0.8mm3, paper phenol 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 20120323-S00011 No.A2044-1/5 LA6587FA Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC 2.2 to 14.0 V Common-phase input voltage VICM 0 to VCC-1.5 V range of Hall input Electrical Characteristics at Ta = 25°C, VCC = 12V, unless especially specified. Ratings Parameter Symbol Conditions Unit min Circuit Current Lock detection capacitor charge ICC1 During drive (CT = L) ICC2 During lock protection (CT = H) typ 4 ICT1 max 6 8 mA 3 4.5 6 mA 0.9 1.2 1.5 μA 0.11 0.18 0.25 μA 5 6.5 8 - current Capacitor discharge current ICT2 Capacitor charge and discharge RCT RCD = ICT1/ICT2 current ratio CT charge voltage VCT1 1.3 1.5 1.6 V CT discharge voltage VCT2 0.3 0.5 0.6 V OUT output L saturation voltage VOL IO = 200mA 0.25 0.45 V OUT output H saturation voltage VOH IO = 200mA 1.0 1.2 V Hall input sensitivity VHN Zero peak value 7 15 mV FG/1/2FG output pin L voltage VFG IFG = 5mA 0.15 0.3 V FG/1/2FG output pin leak current IFGL VFG = 15V 1 30 μA (including offset and hysteresis) Truth Table IN- IN+ CT OUT1 OUT2 FG 1/2FG Mode H L L H L L * During rotation L H L H H - - H off off - - During overheat protection * 1/2FG provides the output equivalent to the divided FG output. No.A2044-2/5 LA6587FA Package Dimensions unit : mm (typ) 3428 3.0 Pd max -- Ta 0.5 Allowable power dissipation, Pd max -- W 0.55 4.9 3.0 10 1 2 0.5 0.16 1.03 0.25 Specified board : 20mm×10mm×0.8mm3 paper phenol 0.4 0.3 0.2 0.1 0 -30 0.1 0.192 -10 10 30 50 70 90 110 Ambient temperature, Ta -- C SANYO : Micro10 Pin Assignment IN+ 1/2FG HB FG IN- LA6587FA VCC OUT2 CT GND OUT1 (Top view) No.A2044-3/5 LA6587FA Block Diagram VCC AMP power supply 1.5VRG HB IN+ H OUT1 OUT2 IN- GND FG 1/2FG Control circuit Charge discharge Discharge pulse CT = 0.47 to 1μF No.A2044-4/5 LA6587FA Sample Application Circuit Di Cr *4 VCC *1 1/2FG R1 FG HB *2 H IN- OUT1 IN+ OUT2 HB *6 *5 CT *3 GND H IN- IN+ On board element *1 : When the breakdown protective DI at reverse connection is to be used, it is necessary to insert the capacitor Cr to secure the regenerative current route. Similarly, Cr must be provided to enhance the reliability when there is no capacitor near the fan power line. *2 : To obtain Hall bias from VCC, carry out 1VCC 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 : To obtain Hall bias from the HB pin, carry out constant-voltage bias at about 1.5V, which enables the Hall element to generate the stable Hall output satisfactory in temperature characteristics. *4 : Keep this open when not using. *5 : When the wiring from the Hall output to IC Hall input is long, noise may be carried through the wiring. In this case, insert the capacitor as shown in the figure. 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. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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