Ordering number : ENA0377A LB11988V Monolithic Digital IC Fan Motor Driver http://onsemi.com Overview LB11988V is a motor driver IC optimal for driving the DC fan motors. Functions • Three-phase full-wave current linear drive • Built-in current limiter circuit • Built-in saturation prevention circuits in both the upper and lower sides of the output stage • Forward/backward rotation direction setting circuit built in • FG amplifier • Thermal shutdown circuit Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings Unit VCC max 24 V VS max 24 V Maximum output current IO max 1.3 A Allowable power dissipation Pd max 0.5 W Independent IC Operating temperature Topr -30 to +75 °C Storage temperature Tstg -55 to +150 °C 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. Allowable Operating Ratings at Ta = 25°C Parameter Supply voltage Hall input amplitude Symbol Conditions Ratings Unit VS 5 to 22 V VCC 7 to 22 V VHALL Semiconductor Components Industries, LLC, 2013 May, 2013 Between Hall inputs ±30 to ±80 mVo-p 20812 SY 20120124-S00010//D1306 TI IM B8-7391 No.A0377-1/6 LB11988V Electrical Characteristics at Ta = 25°C, VCC = 12V, VS = 12V Parameter Symbol Ratings Conditions min VCC current drain ICC typ Unit max RL = 560Ω (Y) 15 24 mA VOsat1 IO = 500mA, Rf = 0.5Ω, Sink + Source (Saturation prevention function included) 2.1 2.6 V VOsat2 IO = 1.0A, Rf = 0.5Ω, Sink + Source (Saturation prevention function included) 2.6 3.5 V 1.0 mA +6 mV Output Output saturation voltage Output leakage current IOleak Hall amplifier Input offset voltage Voff (HALL) Input bias current Vb (HALL) Common-mode input voltage -6 3 μA 3 VCC-3 V 8 VIN, WIN Vcm (HALL) 1 FR Threshold voltage VFRTH 4 Input bias current Ib (FR) -5 V μA Current limiter LIM pin current limit level ILIM Rf = 0.5Ω, With the Hall input logic states fixed 1 A 0.28 V (U, V, W = high, high, low) Saturation Saturation prevention circuit VOsat (DET) lower side voltage setting RL = 560Ω (Y), Rf = 0.5Ω, The voltage between each output and the corresponding Rf. FG amplifier Upper side output saturation voltage Vsatu (SH) Lower side output saturation voltage Vsatd (SH) Hysteresis 11.8 0.3 Vhys TSD operating temperature T-TSD V Design target value* V 23 mV 170 °C Note * : Items shown to be design target values in the conditions column are not measured. Package Dimensions unit : mm (typ) 3315 9.75 0.5 5.6 13 7.6 24 1 12 0.8 0.15 0.3 1.5MAX 0.1 (1.3) (0.48) SANYO : SSOP24J(275mil) No.A0377-2/6 LB11988V Pd max - Ta Allowable Power Dissipation,Pd max - W 0.6 Independent IC 0.5 0.4 0.30 0.3 0.2 0.1 0 -30 -10 10 30 50 70 90 Ambient Temperature, Ta - °C 16 WIN- 15 WIN+ 14 VIN- 13 NC FC 9 UIN+ 10 UIN- 11 VIN+ 12 17 NC 18 VCC 19 VS RF (PWR) 20 21 NC 22 NC 23 UOUT 24 VOUT Pin Assignment NC 8 NC 7 GND 6 FR 5 FGOUT 4 NC 3 NC 2 WOUT 1 LB11988V Top view Truth Table and Control Functions Note : The “H” state for FR is defined as a voltage of 8V or higher, and the Hall input Source→Sink 1 2 3 4 5 6 V→W W→V U→W W→U U→V V→U W→V V→W W→U U→W V→U U→V FR U V W H H L H H L L H L H L L H L “L” state for FR is defined as a voltage of 4V or lower. (When VCC = 12V.) Note : For the Hall inputs, the input high state is defined to be the state H where the (+) input is higher than the corresponding (-) input by L 0.01V or higher, and the input low state is defined to be the state H where the (+) input is lower than the corresponding (-) input by L 0.01V or higher. H L H L H H L H L H L Note : Since this drive technique is a 180° current application scheme, the phases other than the sink and the source phases will not turn off. L No.A0377-3/6 Forward/reverse switing Reference voltage - + TSD Current limiter + GND Feedback amplifier Differential distribution LIMREF Synthesized output logarithmic compression block Bandgap 1.2V - + - + - + FC Logarithmic conversion and differential distribution VCC FR WIN- WIN+ VIN- VIN+ UIN- UIN+ VCC VCC - + - + UIN- UIN+ - + + FG amplifier - + Schmitt amplifier - + Drive distribution circuit and lower side saturation prevention control Upper side saturation prevention control FGOUT VCC WOUT VOUT UOUT RF VS LB11988V Block Diagram Hall input synthesis block (linear matrix) No.A0377-4/6 LB11988V Equivalent Circuit Pin name UIN+ UINVIN+ VINWIN+ WIN- Equivalent circuit Input + Input 200Ω 200Ω 100μA UOUT VOUT VS VCC WOUT RF 150μA Output VS Lower side oversaturation prevention circuit input block 200Ω 30kΩ RF FR VCC 200μA FR 200Ω 1/2 VCC FC VCC 10kΩ FC FGOUT VCC VCC FGOUT No.A0377-5/6 LB11988V Pin Functions Pin No. Pin name 6 GND 3 FGOUT 5 FR 9 FC 10, 11 15, 16 UIN+, UINVIN+, VINWIN+, WIN- 18 VCC Function Ground for circuits other than the output transistors. Note that the Rf pin will be at the lowest potential of the output transistors. 12, 14 This is the FG amplifier output pin. Internally, it is a resistive load. (Pull up) Forward/reverse switching pin Corrects the frequency characteristics of the saturation prevention circuit loop and current limiter circuit. U-phase Hall input. Logic high refers to the state where IN+ > IN-. V-phase Hall input. Logic high refers to the state where IN+ > IN-. W-phase Hall input. Logic high refers to the state where IN+ > IN-. Power supply provided to all IC internal circuits other than the output block. This voltage must be stabilized so that ripple and noise do not enter the IC. 19 VS 5 RF Output block power supply Used for output current detection. The current limiter circuit operates using the resistor (Rf) connected between this pin and ground. Note that the lower side saturation prevention circuit operates according to the voltage that appears on this pin. Since the over-saturation level is set by this voltage, the level of the lower side saturation prevention circuit may be degraded in the large current region if the value of Rf is made extremely small. 23 U-phase Hall output. 24 UOUT VOUT 1 WOUT W-phase Hall output. V-phase Hall output. (These pins include internal spark killer diodes.) 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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