Ordering number : ENA2020 LA6588MC Monolithic Linear IC 24V power supply, BTL output linear drive http://onsemi.com Single-phase Fan Motor IC Overview The LA6588MC is a Single-phase bipolar fan motor IC for 24V power supply. BTL output linear drive ensures highly-efficient, energy-saving, and silent drive while suppressing the ineffective current. Lock protection and lock signal circuit are incorporated, proving most suitable for consumer equipment power supply, OA equipment and car audio system, etc which require high reliability and low noise. Functions • Single-phase full-wave linear drive by BTL output (gain resistance 500 to 360k, 57dB) : No switching noise, which is most favorable for use in equipment requiring silent operation, such as consumer equipment power supply, car audio system, etc. • Operable at low voltage and over a wide operation voltage range (8 to 26.4V) • Low saturation output (Upper + lower saturation voltages: VOsat (total) = 1.1V typ, IO = 200mA) : High coil efficiency and small current drain. Small heat generation from IC itself • Lock protection and automatic return circuits incorporated • Lock protection signal output (L during rotation, H at stop, open collector output) • Output (Rotation detection output: Open collector output) • Hall bias incorporated (VHB = 1.5V) • Heat protection circuit :The heat protection circuit suppresses the drive current to prevent burn or damage of IC when the large current flows due to output short-circuit and the IC chip temperature exceeds 180°C. • Small package with high heat capacity (MFP10SK) Pin- compatible silent series (5V/12V/24V products) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC max 28 V Output current IOUT max 0.8 A Output withstand voltage VOUT max 28 V VRD/FG max 28 V IRD/FG max 5 mA Output withstand voltage of RD/FG output pin RD/FG output current HB output current IB max Allowable dissipation Pd max Mounted on a specified board. * 10 mA 800 mW Operating temperature Topr -30 to +90 °C Storage temperature Tstg -55 to +150 °C * Mounted on a specified board: 114.3×76.1×1.6 mm3, 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 30712 SY 20120127-S00002 No.A2020-1/4 LA6588MC Recommended Operating Conditions at Ta = -30 to +90°C Parameter Symbol Ratings Conditions min Unit typ max Supply voltage VCC 8 26.4 V Common-phase input voltage VICM 0 VCC–1.5 V range of Hall input Electrical Characteristics at Ta = 25°C, VCC = 24V, unless otherwise specified. Parameter Symbol Circuit Current Lock detection capacitor Ratings Conditions ICC1 During drive (CT = L) ICC2 During lock protection (CT = H) min typ 4.5 ICT1 Unit max 7 9.5 mA 2.5 4.5 6.5 mA 2.0 2.7 3.5 μA 0.15 0.23 0.30 μA 10 12 14 charge current Capacitor discharge current ICT2 Capacitor charge and RCT RCD = ICT1/ICT2 discharge current ratio CT charge voltage VCT1 1.55 1.7 1.8 V CT discharge voltage VCT2 0.65 0.75 0.85 V OUT output L saturation VOL IO = 200mA 0.2 0.3 V VOH IO = 200mA 0.9 1.2 V VHN Zero peak value (including offset and hysteresis) voltage OUT output H saturation voltage Hall input sensitivity 7 mV RD/FG output pin L voltage VRD/FG IRD/FG = 5mA 0.2 0.3 V RD/FG output pin leak current IRD/FG VRD/FG = 15V 1 3 μA 1.5 1.7 V VHB HB output voltage IHB = 5mA 1.3 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 During overheat protection -:Don’t care. No.A2020-2/4 LA6588MC Package Dimensions unit : mm (typ) 3420 5.0 0.5 4.4 6.2 Allowable power dissipation, Pd max -- W 10 1 2 1.0 0.15 0.35 0.05 (1.5) 1.55 0.8 MAX Pd max -- Ta 1.0 Mounted on specified board: 114.3×76.1×1.6mm3 glass epoxy board. 0.8 0.6 0.4 0.384 0.2 0 -30 0 30 60 90 Ambient temperature, Ta -- °C SANYO : MFP10SK(225mil) 120 MSG06804 Pin Assignment Block Diagram IN+ 1 10 RD HB 2 9 FG IN- 3 8 VCC CT 4 7 OUT2 OUT1 5 6 GND LA6588MC Top View VCC 1.5V REG AMP Power supply HB IN+ OUT1 H OUT2 IN- GND FG Control circuit Charge discharge RD Discharge pulse CT CT=0.47 to 1μF No.A2020-3/4 LA6588MC Application Circuit Examples Di *4 Cr VCC RD *1 R1 *2 H HB FG IN- OUT1 IN+ OUT2 HB *5 *3 H CT IN- GND IN+ *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: When taking Hall bias from VCC, carry out bias to VCC with resistor R1 as shown in the figure. Linear drive is achieved through voltage control of the coil by amplifying the Hall output. With large Hall element output, the start performance and efficiency are improved. Noise can be reduced further by adjusting the Hall element. *3: When the Hall bias is taken from the HB pin, constant-voltage bias is made with about 1.5V. Therefore, the Hall element can provide the 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). 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