LB11988HR-TLM-H

Ordering number : ENA0300A LB11988HR Monolithic Digital IC Fan Motor Driver http://onsemi.com Overview LB11988HR 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 0.8 W Independent IC Operating temperature Topr -40 to +85 °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 5 to 22 V VHALL Semiconductor Components Industries, LLC, 2013 May, 2013 Between Hall inputs ±30 to ±80 mVo-p 20812 SY 20120124-S00009//52506 MH IM B8-7845 No.A0300-1/6 LB11988HR 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 -6 Vb (HALL) Common-mode input voltage 3 μA 3 VCC-3 V 1.5 VCC-1.5 V 8 VIN, WIN Vcm1(HALL) VCC=VS=12V Vcm2(HALL) VCC=VS=5V 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) RL = 560Ω (Y), Rf = 0.5Ω, The voltage between lower side voltage setting each output and the corresponding Rf. FG amplifier Upper side output saturation Vsatu (SH) 11.8 V voltage Lower side output saturation Vsatd (SH) 0.3 V voltage Hysteresis Vhys TSD operating temperature T-TSD Design target value* 23 mV 170 °C Note * : Items shown to be design target values in the conditions column are not measured. Package Dimensions unit : mm (typ) 3233B HEAT SPREADER 15.2 (6.2) 0.65 7.9 10.5 15 (4.9) 28 1 14 0.8 0.25 2.7 2.45max 0.3 (2.25) 2.0 0.1 (0.8) SANYO : HSOP28H(375mil) No.A0300-2/6 LB11988HR Pd max - Ta Allowable power dissipation, Pd max - W 1.0 Independent IC 0.8 0.8 0.6 0.42 0.4 0.2 0 -40 0 -20 20 40 60 80 100 Ambient temperature, Ta - C 19 WIN- 18 WIN+ 17 VIN- 16 NC 15 NC NC 10 NC 11 UIN+ 12 UIN- 13 VIN+ 14 20 NC VCC 21 22 VS 23 RF 24 NC 25 NC 26 NC 28 VOUT 27 UOUT Pin Assignment 9 FC 8 7 NC FR GND 6 5 NC FGOUT 4 3 NC 2 NC WOUT 1 LB11988HR 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.A0300-3/6 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 LB11988HR Block Diagram Hall input synthesis block (linear matrix) No.A0300-4/6 LB11988HR 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.A0300-5/6 LB11988HR Pin Functions Pin No. Pin name 7 GND FRAME Note that the Rf pin will be at the lowest potential of the output transistors. 4 FGOUT 6 FR 9 FC 12, 13 18, 19 UIN+, UINVIN+, VINWIN+, WIN- 21 VCC 14, 17 Function Ground for circuits other than the output transistors. 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. 22 VS 23 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. 27 U-phase Hall output. 28 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. 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. SCILLC does not convey any license under its patent rights nor the rights of others. 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