31412 sy 20120127-s00003 no.a2023-1/5 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 LB11861MC overview the LB11861MC is a single-phase bipolar drive motor driver that easily implements direct pwm motor drive systems with excellent efficiency. the LB11861MC is optimal for fa n motor drive in personal computer power supply systems and cpu cooling fan systems. features ? single-phase full-wave drive (16v, 1.2a transistors are built in) ? external pwm control pin inco rporated (f=16k to 50khz) external pwm signal duty control to enable sp eed control to stop, medium speed, and full speed slow-decay regeneration to enable low power c onsumption and high-efficiency rotation control ? soft switching circuit incorporated soft-sw circuit achieving small loss, low noise, and low vibration at a time of phase shift ? built-in regenerative diode (di) ; only requires a minimal number of external components. ? built-in lock protection and automatic recovery circuits ? fg (speed detection) outputs incorporated ? built-in thermal shutdown circuit. monolithic digital ic single-phase full-wave fan motor driver orderin g numbe r : ena2023
LB11861MC no.a2023-2/5 specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit v cc maximum output voltage v cc max 18 v out pin maximum output current i out max 1.2 a out pin output voltage v out max 18 v pwm-in input pin voltage vpwm-in max v cc v fg output pin output voltage vfg max 18 v fg output current ifg max 10 ma allowable power dissipation pd max when mounted on a circuit board *1 0.8 w operating temperature topr -30 to +90 c storage temperature tstg -55 to +150 c *1 specified circuit board : 114.3 76.1 1.6mm 3 , glass epoxy. caution 1) absolute maximum ratings represent the va lue which cannot be exceeded for any length of time. caution 2) even when the device is used within the range of abso lute maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reliability of th e ic may be degraded. please contact us for the further detai ls. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit v cc supply voltage v cc 4.5 to 16 v vpwm-in input h voltage range vpwm-in-h 2.5 to v cc v vpwm-in input l voltage range vpwm-in-l 0 to 1 v hall sensor input common-mode input voltage range vicm 0.2 to 3 v electrical characteristics unless otherwise specified ta = 25 c, v cc = 12v ratings parameter symbol conditions min typ max unit i cc 1 drive mode 15 24.5 29 ma circuit current i cc 2 lock protection mode 6 11 16 a ct pin high-level voltage vcth 3.45 3.6 3.75 v ct pin low-level voltage vctl 1.4 1.55 1.7 v ict charge current ict1 1.7 2.2 2.8 a ict discharge current ict2 0.17 0.22 0.28 a ict charge/discharge current ratio rct 8 10 11.5 out output low saturation voltage v ol i o = 200ma 0.2 0.3 v out output high saturation voltage v oh i o = 200ma 0.9 1.1 v hall sensor input sensitivity vhn zero peak value (including offset and hysteresis) 10 20 mv pwm-in input current ipin pwm-in=0v -10 a rd/fg output pin low-level voltage v rdl/fgl ird/fg = 5ma 0.2 0.3 v rd/fg output pin leakage current irdl/fgl vrd/fg = 7v 30 a heat protection circuit thd (*2) design target 180 c (*2) the standard is a design target value and measurement with the single piece has not been made. stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
LB11861MC no.a2023-3/5 package dimensions unit : mm (typ) 3420 truth table pwm-in in- in+ ct out1 out2 fg mode high low high low low high low high low high off during rotation ? drive high low off low low low low high low low off off during rotation ? regeneration - high low high off low - low high high off high off lock protection pin assignment v cc : common power supply for mo tor and control systems pgnd: motor system gnd sgnd: control system gnd sanyo : mfp10sk(225mil) 1 10 2 0.8 max 1.55 1.0 0.35 5.0 0.15 6.2 (1.5) 0.05 4.4 0.5 LB11861MC pgnd out2 v cc pwm-in fg out1 sgnd ct in- in+ mfp-10sk(top view) 0 0.8 0.4 0.2 0.6 1.0 90 50 70 10 30 110 0.38 ambient temperature, ta ?c allowable power dissipation, pd max ?w pd max ? ta specified circuit board : 114.3 76.1 1.6mm 3 glass epoxy board
LB11861MC no.a2023-4/5 block diagram application circuit example *1. power supply and ground lines p-gnd is connected to the motor power supply system and s-gnd is connected to the control circuit power supply system. these two systems should be formed from se parate lines and the control system exte rnal components shoul d be connected to s-gnd. *2. regeneration power supply stabilization capacitor the capacitor cm provides power supply stabilization for both pwm drive and kickback absorption. a capacitor with a value of over 1 to 10f is used for cm. insert the zenor diode for kic kback protection between vcc and gnd. since this ic adopts a technique in which switching is performed by the high side transi stor and regeneration is handled by the low side transistor, t he pattern connecti ng cm to vm and p-gnd must be as wide and as short as possible. *3. pwm-in pin this is for speed control with the external pwm signal. with dr iving at the input of ?h? and re generation (slow-decay) at the input of ?l?, high efficiency ro tation control can be made. rp=10k is the current limiting resistor for protection. though the input signal frequency range is 0 to 50 khz, 16 k to 50 kh z is recommended. rotation can be stopped by inputting ?l?. v cc fg hall in+ in- sgnd ct pwm-in pgnd out1 out2 m thermal protection circuit constant voltage control circuit charge/discharge circuit amplifier with hysteresis delay circuit delay circuit v cc in- in+ pwm-in ct fg out1 out2 pgnd sgnd h *2 *3 *4 *5 *1 ct=0.47 to 1uf pwm control signal f=16k to 50khz
LB11861MC ps no.a2023-5/5 *4. hall sensor input lines that are as short as possible must be used to prevent noise from entering the system. th e hall sensor input circuit cons ists of a comparator with hysteresis (20mv). we recommend that the hall se nsor input level be at least th ree times this hysteresis, i.e . at least 60mvp-p. *5. fg output this is an open collector output, and a rotation count det ection function can be implemented using this fg output, which corresponds to the phase switching. this pin must be left open if unused. 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 mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l 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 techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner.
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