40809 ms 20090323-s00009 no.a1433-1/4 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 LA6595T overview the LA6595T is a single-phase bipolar fan motor driver that achieves quite operation, power savings, silent operation and high efficiency that suppresses reac tive current through btl output linear dr ive. it provides lock protection and rotation detection circuits on chip, and is optimal for applica tions that require high reliability and low noise, such as notebook personal computers, power supplies in consumer electronic equipment, car audio, and cpu cooling systems. features ? btl output single-phase full-wave lin ear drive (gain resistor : 1 to 360k , 51db) ? supports low-voltage drive and features a wide usable voltage range (2.2 to 14.0v) ? low saturation output (high side + low side saturation voltage : v o sat (total) = 1.2v (typical), i o = 200ma) ? built-in lock protection and automatic return circuits ? built-in rd (rotation detection) output ? thermal protection circuit ? small-sized, high ther mal capacity package specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc max 15 v output current i out max 0.5 a output voltage v out max 15 v rd output pin output withstand voltage v rd max 15 v rd output current i rd max 10 ma allowable power dissipation pd max mounted on a specified board* 400 mw operating temperature topr -30 to +90 c storage temperature tstg -55 to +150 c * specified board : 114.3mm 76.1mm 1.6mm, glass epoxy board. orderin g numbe r : ena1433 monolithic linear ic btl drive single-phase full-wave fan motor driver 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.
LA6595T no.a1433-2/4 recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 2.2 to 14.0 v common-phase input voltage range of hall input v icm 0 to v cc -1.5 v electrical characteristics at ta = 25 c, v cc = 12v, unless otherwise specified. ratings parameter symbol conditions min typ max unit i cc 1 drive mode (ct = low) 36 9 ma circuit current i cc 2 lock protection mode (ct = high) 2.5 5 7.5 ma lock detection capacitor charge current i ct 1 0.9 1.2 1.5 a capacitor discharge current i ct 2 0.10 0.18 0.25 a capacitor charge/discharge current ratio r ct r cd = i ct 1/i ct 2 5 6.5 8 ct charge voltage v ct 1 1.3 1.5 1.7 v ct discharge voltage v ct 2 0.3 0.5 0.7 v out output low saturation voltage v ol i o = 200ma 0.25 0.45 v out output high saturation voltage v oh i o = 200ma 0.95 1.2 v hall input sensitivity vhn zero peak value (including offset and hysteresis) 7 15 mv rd output pin low-level voltage v rd i rd = 5ma 0.15 0.3 v rd output pin leakage current i rdl v rd = 15v 1 30 a package dimensions unit : mm (typ) 3245b sanyo : msop8(150mil) 3.0 1.1max 3.0 0.5 4.9 12 8 0.25 0.65 (0.53) (0.85) 0.125 0.08 -30 0 30 60 90 120 0 500 400 300 200 100 pd max -- ta ambient temperature, ta -- c allowable poswer dissipation, pd max -- mw specified board: 114.3 76.1 1.6mm 3 glass epoxy board. 192
LA6595T no.a1433-3/4 pin assignment 1 in + 2 in ? 3 ct 4 out1 5 6 7 8rd v cc out2 gnd top view LA6595T block diagram in + in ? ct out1 rd v cc out2 gnd h ct=0.47 to 1 f control circuit charge/discharge circuit discharge pulse truth table in ? in + ct out1 out2 rd mode high low high low low low high low low high low during rotation ? ? high off off off lock protection
LA6595T ps no.a1433-4/4 application circuit example in + in ? ct out1 rd v cc out2 gnd h cr di *1 r2 r2 *4 *2 *3 circuit board mounted cpmponents *1. if the diode di (which protects the ic destruction by reverse connection) is used, it is necessary to insert the capacitor cr and provide a regenerative cu rrent route. similarly, if there is no nearby capacitor on the fan power supply line, cr will also be necessary to improve reliability. *2. if the hall sensor bias is taken from v cc , a 1/2 v cc bias, as shown in the figure, must be used. linear drive is implemented by amplifying the hall sensor output and applying voltage control to the coil. if the hall effect sensor provides a strong output, the startup characteristics and efficiency will be good, then even quieter operation will be achieved by adjusting the hall effect sensor. *3. this pin must be left open if unused. *4. if the line from the hall sensor output to the hall sensor input of ic are long, noise may enter the system from that line. if that becomes a problem, insert a capacitor as shown in the figure. 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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