LA6584JA-AH

Ordering number : ENA2125 LA6584JA Monolithic Linear IC Single-phase Full-wave Driver For Fan Motor http://onsemi.com Overview The LA6584JA is Single-phase bipolar fan motor is put into silent driving by means of BTL output linear drive, offering high efficiency and power saving by suppressing the reactive current. Lock protection and rotation signal (FG, RD) circuits are built in, ensuring optimum application to small fans for notebook PC, consumer equipment power supply, car audio system, CPU cooler, etc. that require high reliability and low noise. Functions and Applications • Single-phase full-wave driver for fan motor Specitications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Output voltage VCC max 15 V Output current IOUT max 1.2 A Output withstand voltage VOUT max 15 V RD/FG output pin output VRD/FG max 15 V 5 mA 10 mA Withstand voltage RD/FG output current IRD/FG max HB output voltage IB max Allowable dissipation Pd max Operating temperature range Storage temperature range Mounted on a specified board* 0.8 W Topr -30 to +90 °C Tstg -55 to +150 °C * Mounted on a specified board (114.3mm × 76.1mm × 1.6mm, Glass epoxy) 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 O1012NKPC 20120305-S00001 No.A2125-1/5 LA6584JA Recommended Operating Range at Ta = 25°C Parameter Conditions Supply voltage VCC Common-phase input voltage VICM Conditions Ratings Unit 2.8 to 14.0 V 0 to VCC-1.5 V range of Hall input Electrical Characteristics at Ta = 25°C VCC = 12V, unless otherwise specified. Ratings Parameter Conditions Circuit current Conditions min typ Unit max ICC1 During drive (CT = L) 4 6 9 mA ICC2 During lock protection (CT = H) 2 4 6 mA ICT1 2.0 2.8 3.5 μA Capacitor discharge current ICT2 0.15 0.23 0.30 μA Capacitor charge and discharge RCT 9 12 15 - 1.6 1.7 1.8 V 0.6 Lock detection capacitor charge current RCD = ICT1/ICT2 current ratio CT charge voltage VCT1 CT discharge voltage VCT2 0.7 0.8 V OUT output L saturation voltage VOL IO = 200mA 0.2 0.3 V OUT output H saturation voltage VOH IO = 200mA 0.9 1.2 V Hall input sensitivity VHN Zero peak value 7 15 mV RD/FG output pin L voltage VRD/FG IRD/FG = 5mA 0.1 0.2 V RD/FG output pin leak current IRD/FGL VRD/FG = 15V 1 30 μA HB output L voltage VHBL IHB = 5mA 1.5 1.7 V (including offset and hysteresis) 1.3 Package Dimensions unit : mm (typ) 3179C Pd max -- Ta 6.5 0.5 6.4 11 4.4 20 1 10 0.65 0.15 0.22 1.5max (1.3) (0.33) Allowable power dissipation, Pd max -- W 1.0 Specified board: 114.3×76.1×1.6mm3 Material: Glass epoxy 0.8 0.6 0.4 0.38 0.2 0 --30 --20 0 20 40 60 80 90 100 0.1 Ambient temperature, Ta -- °C SANYO : SSOP20(225mil) No.A2125-2/5 LA6584JA Truth Table IN- IN+ CT OUT1 H L L H L H L - - OFF OFF - H OUT2 FG RD Mode L L L During rotation H H H Lock protection Pin Assignment FGND 1 20 FGND FGND 2 19 FGND FGND 3 18 FGND OUT2 4 17 OUT1 NC 5 16 NC LA6584JA VCC 6 15 CT NC 7 14 IN- FG 8 13 HB RD 9 12 IN+ NC 10 11 NC Top view No.A2125-3/5 LA6584JA Sample Application Circuit Di Cr *4 *1 VCC R2 FG HB H *2 RD OUT1 IN- HB OUT2 IN+ R1 R2 *5 CT GND *3 H IN- On board element IN+ *1 *2 *3 *4 *5 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. 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. 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.) Keep this open when not used. 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. No.A2125-4/5 LA6584JA Internal Equivalent Circuit VCC 1.5VRG HB H IN+ OUT1 OUT2 IN- GND FG Control Circuit Charge/discharge circuit RD Discharge pulse CT = 0.47 to 1µF 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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