LA6585FA-BH

Ordering number : ENA2088 LA6585FA Monolithic Linear IC BTL Drive Single-Phase Full-Wave Fan Motor Driver http://onsemi.com Overview The LA6585FA is a single-phase bipolar fan motor driver that achieves quite operation, power savings, silent operation and high efficiency that suppresses reactive current through BTL output linear drive. It provides lock protection and rotation signal circuits on chip, and is optimal for applications that require high reliability and low noise, such as notebook personal computers, power supplies in consumer electronic equipment, car audio, and CPU cooling systems. Features • BTL output single-phase full-wave linear drive (gain resistor : 1 to 360kΩ, 51dB) • Supports low-voltage drive and features a wide usable voltage range (2.2 to 14.0V) • Low saturation output (high side + low side saturation voltage : Vosat (total) = 1.2V (typical), IO = 250mA) • Built-in lock protection and automatic return circuits • Built-in FG output • Built-in Hall sensor bias (VHB = 1.5V) • Thermal protection circuit • Small-sized, high thermal capacity package Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC max 15 V Output current IOUT max 0.5 A Output voltage VOUT max 15 V VFG max 15 V 10 mA 400 mW FG output pin oiutput withstand voltage FG output current Allowable power dissipation IFG max Pd max 1 When mounted on a circuit board * Operating temperature Topr -30 to +90 °C Storage temperature Tstg -55 to +150 °C *1 Specified circuit board : 114.3 × 76.1 × 1.6mm3, 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 70412 SY 20120619-S00001 No.A2088-1/4 LA6585FA Recommended 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 otherwise specified. Parameter Symbol Ratings Conditions min Circuit current Lock detection capacitor charge ICC1 Drive mode (CT = low) ICC2 Lock protection mode (CT = high) typ 6 9 mA 2.5 5 7.5 mA 0.9 1.2 1.5 μA 0.10 0.18 0.25 μA 5 6.5 8 1.3 1.5 1.7 3 ICT1 Unit max current Capacitor discharge current ICT2 Capacitor charge/discharge current RCT RCD = ICT1/ICT2 ratio CT charge voltage VCT1 CT discharge voltage VCT2 0.5 0.7 V OUT output low saturation voltage VOL IO = 200mA 0.25 0.45 V OUT output high saturation voltage VOH IO = 200mA 0.95 1.2 V Hall input sensitivity VHN 7 15 mV 0.3 Zero peak value (including offset and V hysteresis) FG output pin low-level voltage VFG IFG = 5mA 0.15 0.3 V FG output pin leakage current IFGL VFG = 15V 1 30 μA Package Dimensions unit : mm (typ) 3427 3.0 1 2 0.65 0.18 0.08 1.1 MAX 0.33 Allowable power dissipation, Pd max – mW 0.55 4.9 3.0 8 500 Pd max – Ta Specified circuit board : 114.3×76.1×1.6mm3 paper phenol 400 300 200 192 100 0 – 30 0 30 60 90 120 Ambient temperature, Ta – °C SANYO : Micro8 No.A2088-2/4 LA6585FA Truth Table IN− IN+ CT OUT1 OUT2 FG High Low Low High Low Low Low High Low High High − − Off Off − High Mode During rotation Lock protection Pin Assignment IN+ 1 8 FG IN- 2 7 VCC CT 3 6 OUT2 OUT1 4 5 GND Top view Application Circuit Example Di Cr *3 *1 VCC *FG R2 H IN- OUT1 IN+ OUT2 *2 R2 *4 CT GND On board element *1. If the diode Di (which protects the IC destruction by reverse connection) is used, it is necessary to insert the capacitor Cr and provide a regenerative current route. Similarly, if there is no nearby capacitor on the fan power supply line, Cr will also be necessary to improve reliability. *2. If the Hall sensor bias is taken from VCC, a 1/2 VCC bias, as shown in the figure, must be used. Linear drive is implemented by amplifying the Hall sensor output and applying voltage control to the coil. If the Hall effect sensor provides a strong output, the startup characteristics and efficiency will be good, then even quieter operation will be achieved by adjusting the Hall effect sensor. *3. This pin must be left open if unused. *4. If the line from the Hall sensor output to the Hall sensor input of IC are long, noise may enter the system from that line. If that becomes a problem, insert a capacitor as shown in the figure. No.A2088-3/4 LA6585FA Internal Equivalent Circuits VCC IN+ OUT1 H OUT2 IN- GND *FG Control circuit Charge/discharge Discharge pulse 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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