31412 sy 20120127-s00004 no.a2024-1/7 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 LB1862MC overview single-phase full-wave drive design and a compact package make these ics optimal for small fans (especially cpu cooling fans). low switching noise and effec tive motor drive are further advantages. functions ? support for 5v/12v dual power supply voltage ? built-in regenerative circuit allows us e of reverse connection protection diode ? built-in hall amplifier with hysteresis (s upports core without auxiliary electrode) ? built-in lockup protection and automatic recovery circuits ? latch-type lockup detection output (rd) is low during rotation and high during stop ? hall bias pin and start/stop pin allow reduced current drain in standby mode ? built-in thermal protection circuit specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 17 v maximum output current i out max 0.5 a maximum output withstand voltage v out max 17 v rd maximum output withstand voltage v rd max 17 v rd maximum output current i rd max 5ma hb maximum output current i b max 10 ma st maximum input voltage v st max 15 v allowable power dissipation pd max mounted on a specified board * 850 mw operating temperature topr -30 to +90 c storage temperature tstg -55 to +150 c * specified board: 114.3mm 76.2mm 1.5mm, glass epoxy board. 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. monolithic digital ic for fan motor single-phase full-wave driver orderin g numbe r : ena2024 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.
LB1862MC no.a2024-2/7 allowable operating conditions at ta = 25 c parameter symbol conditions ratings unit power supply voltage v cc 3.8 to 16.8 v st input high level voltage st h 3 to 14 v st input low level voltage st l -0.3 to +0.4 v hall input common mode voltage v icm 0.2 to v cc -1.5 v electrical characteristics at ta = 25 c, v cc = 5v ratings parameter symbol conditions min typ max unit in drive mode (ct = ?l?, st = ?l?) 6.5 9.1 ma in lockup protection mode (ct = ?h?, st = ?l?) 2.2 3.1 ma current drain i cc in standby mode (st = ?h?) 110 150 a lockup detection capacitor charge current i ct 1 1.9 2.8 3.7 a capacitor discharge current i ct 2 0.32 0.46 0.60 a capacitor charge/discharge current ratio r ct r ct = i ct 1/i ct 2 5.0 6.0 7.0 ct charge voltage v ct 1 2.55 2.75 2.95 v ct discharge voltage v ct 2 1.6 1.8 2.0 v output low level voltage v ol i o = 200ma 0.2 0.3 v output high level voltage v oh i o = 200ma 3.9 4.1 v hall input sensitivity v hn zero peak value (including offset and hysteresis) 7 15 mv rd output pin low voltage v rd i rd = 5ma 0.1 0.3 v rd output pin leakage current i rd l v rd = 15v 30 a hb output low voltage v hbl i hb = 5ma 1.0 1.3 v st pin input current i st v st = 5v 75 100 a package dimensions unit : mm (typ) 3420 pd max -- ta -20 0 20 40 60 80 100 0 1 0.8 0.6 0.4 0.2 0.85 0.41 90 -30 ambient temperature, ta -- c allowable power dissipation, pd max -- mw specified board: 114.3 76.2 1.5mm 3 glass epoxy board. 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
LB1862MC no.a2024-3/7 pin assignment 1 2 in + 3 ct 4 out1 5 gnd 8st 7v cc 6 out2 10 9 rd hb top view LB1862MC block diagram start/stop st gnd out1 out2 rd m ct v cc in + hb hall charge / discharge circuit delay circuit delay circuit control circuit thermal protection circuit discharge pulse hysteresis amplifier truth table st in- in+ ct out1 out2 rd hb mode h - - - off off off off standby h l h l l h l l h l l rotating l - - h off off off l lockup protection activated latch-type rd output is low during rotation and high during stop.
LB1862MC no.a2024-4/7 startup v cc out ct rd fg power-on lockup protection/automatic recovery output off output off out rd fg ct locked output on released start/stop st out rd fg output off
LB1862MC no.a2024-5/7 design reference (1) v cc pin power supply pin for control block and motor drive. accepts a wide operation voltage range from 3.8 to 16.8 v, for 5v/12v dual po wer supply support. (2) out1, out2 pins single-phase coil output pins. bipolar drive output with upper side inverted and lower si de single output. built-in regenerative circuit regenerates kickback current between lower side npn outputs when a diode is used for protection against reverse connection. (3) in ? , in + pins hall input signal pins the hall signal is amplified into a square wave by the hall amplifier with hysteresis char acteristics of 3.5mv (typ.). the hall input signal amplitude should be 70mv or more. (4) ct pin this pin serves for connecting a capacitor between ct and gnd. the capacitor determines the characteristics of the built-in lockup protection circuit for preventing coil burnout in the case of motor restraint. once normal motor load is re stored, the automatic recovery circuit resets itself. changing the capacitance alters the lockup detection time. when a 0.47 mf capacitor is connected between ct and gnd lockup detection time : approx. 0.5s lockup protection time/automatic recovery time : approx. 0.16s (output on) approx. 1s (output off) when not using lockup protection function, this pin should be connected to ground. (5) rd pin open-collector output pin that is low during rotation and off when lockup is detected. the output is a latch type which stays off also when the automatic recovery circuit has restored drive mode unless the rotation actually resumes. (6) st pin and hb pin st pin : when input to this pin is high, motor drive is stopped (out is high impedance). at this time, rd output indicates lockup protection mode off. hb pin : hall bias switching pin. at st pin high input, hall bias is switched to reduce current drain in fan standby mode. if not used, both pins should be open. (7) thermal protection circuit when internal temperature tj of ic reaches 180 c, output current limiter is activ ated to protect against damage.
LB1862MC no.a2024-6/7 application circuit example 1 2 9 8 3 6 4 10 7 5 in + hb st ct out2 out1 rd (fg) v cc gnd LB1862MC h c2 in ? = l in + = l ct = h st = h 12 8 10 6 4 2 0 02 6 4 8 10 16 18 14 12 22 20 v cc = 5v 500 400 300 200 100 0 02 6 4 8 10 16 18 14 12 20 300 400 200 100 0 0.5 0.4 0.3 0.2 0.1 0 300 500 400 200 100 0 1.0 0.8 0.6 0.4 0.2 0 i cc -- v cc i in -- v in v o(sat)l -- i o v o(sat)h -- i o v cc = 3.8v ta = 25 c v cc = 3.8v ta = 25 c power supply voltage, v cc -- v current drain, i cc -- ma input voltage, v in -- v input current, i in -- a output current, i o -- a output current, i o -- a lower side output saturation voltage, v o(sat)l -- v upper side output saturation voltage, v o(sat)h -- v
LB1862MC ps no.a2024-7/7 1.0 0.8 0.6 0.4 0.2 0 024 8 614 12 10 hb rd v rd ,v hb -- i rd ,i hb v cc = 3.8v ta = 25 c i rd , i hb -- ma v rd , v hb -- v 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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