? semiconductor components industries, llc, 2005 september, 2005 ? rev. 12 1 publication order number: cs3341/d cs3341, cs3351, cs387 alternator voltage regulator darlington driver the cs3341/3351/387 integral alternator regulator integrated circuit provides the voltage regulation for automotive, 3?phase alternators. it drives an external power darlington for control of the alternator field current. in the event of a charge fault, a lamp output pin is provided to drive an external darlington transistor capable of switching on a fault indicator lamp. an overvoltage or no stator signal condition activates the lamp output. the cs3341 and cs3351 are available in soic?14 packages. the cs387 is available as a flip chip. for fet driver applications use the cs3361. use of the cs3341, cs3351 or cs387 with external fets may result in oscillations. features ? drives npn darlington ? short circuit protection ? 80 v load dump ? temperature compensated regulation voltage ? shorted field protection duty cycle, self clearing ? pb?free packages are available* maximum ratings rating value unit storage temperature range, t s ?55 to +165 c junction temperature range ?40 to 150 c continuous supply 27 v i cc load dump 400 ma lead temperature soldering: reflow: (smd styles only) (note 1) 230 peak c maximum ratings are those values beyond which device damage can occur. maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. if these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. 60 second maximum above 183 c. *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. cs33x1 = specific device code x 4 or 5 a = assembly location wl = wafer lot y = year ww = work week g = pb?free package soic?14 d suffix case 751a ign nc nc nc stator lamp sense osc 114 v cc nc nc gnd sc dd 1 14 pin connections soic?14 marking diagram v cc sense stator ign gnd nc osc lamp dd sc flip chip, bump side up http://onsemi.com cs33x1g awlyww 1 14 see detailed ordering and shipping information in the package dimensions section on page 4 of this data sheet. ordering information
cs3341, cs3351, cs387 http://onsemi.com 2 figure 1. block diagram ign sense lamp v cc v sup gnd stator enable delay lamp indicator s r q r stator timer v hv v reg + ? enable series regulator load dump detection and protection v sup rs flop set dominate power up stator osc device driver sc note: cs3341/cs387 disconnected cs3351 connected osc + ? + regulator comparator high voltage comparator +
cs3341, cs3351, cs387 http://onsemi.com 3 electrical characteristics (?40 c < t a < 125 c, ?40 c < t j < 150 c, 9.0 v v cc 17 v; unless otherwise specified.) characteristic test conditions min typ max unit supply supply current enabled ? ? 12 25 ma supply current disabled ? ? ? 50 a driver stage output high current v dd = 1.2 v ?10 ?6.0 ?4.0 ma output low voltage i ol = 25 a ? ? 0.35 v minimum on time ? 200 ? ? s minimum duty cycle ? ? 6.0 10 % short circuit duty cycle ? 1.0 ? 5.0 % field switch turn on rise time ? 30 ? 90 s field switch turn on fall time ? 30 ? 90 s stator input high voltage ? 10 ? ? v input low voltage ? ? ? 6.0 v stator time out high to low 6.0 100 600 ms stator power?up input high cs3351 only 10 ? ? v stator power?up input low cs3351 only ? ? 6.0 v lamp output high current v lamp @ 3.0 v ? ? 50 a output low voltage i lamp @ 30 ma ? ? 0.35 v ignition input high voltage i cc > 1.0 ma 1.8 ? ? v input low voltage i cc < 100 a ? ? 0.5 v oscillator oscillator frequency c osc = 0.22 f 65 ? 325 hz rise time/fall time c osc = 0.22 f ? 17 ? ? oscillator high threshold c osc = 0.22 f ? ? 6.0 v battery sense input current ? ?10 ? +10 a regulation voltage @25 c, r 1 = 100 k , r 2 = 50 k 13.5 ? 16 v proportional control ? 0.050 ? 0.400 v high voltage threshold ratio v high voltage @ lampon v regulation @ 50%duty cycle 1.083 ? 1.190 ? high voltage hysteresis ? 0.020 ? 0.600 v
cs3341, cs3351, cs387 http://onsemi.com 4 package pin description package pin # pin symbol function soic?14 flip chip 1 1 driver output driver for external power switch?darlington 2 2 gnd ground 3, 6, 7, 9, 13 3 nc no connection 4 4 osc timing capacitor for oscillator 5 5 lamp base driver for lamp driver indicates no stator signal or overvoltage condition 8 6 ign switched ignition powerup 10 7 stator stator signal input for stator timer (cs3351 also powerup) 11 8 sense battery sense voltage regulator comparator input and protection 12 9 v cc supply for ic 14 10 sc short circuit sensing ordering information device package shipping ? cs3341yd14 soic?14 55 units/rail CS3341YD14G soic?14 (pb?free) 55 units/rail cs3341ydr14 soic?14 2500 tape & reel cs3341ydr14g soic?14 (pb?free) 2500 tape & reel cs3351yd14 soic?14 55 units/rail cs3351yd14g soic?14 (pb?free) 55 units/rail cs3351ydr14 soic?14 2500 tape & reel cs3351ydr14g soic?14 (pb?free) 2500 tape & reel cs387h flip chip contact sales ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
cs3341, cs3351, cs387 http://onsemi.com 5 typical performance characteristics figure 2. battery voltage vs. temperature ( c) over process variation 15.5 15 14.5 14 13.5 13 ?40 ?20 0 20 40 60 80 100 120 temperature ( c) battery voltage applications information the cs3341 and cs3351 ic?s are designed for use in an alternator charging system. the circuit is also available in flip?chip form as the cs387. in a standard alternator design (figure 3), the rotor carries the field winding. an alternator rotor usually has several n and s poles. the magnetic field for the rotor is produced by forcing current through a field or rotor winding. the stator windings are formed into a number of coils spaced around a cylindrical core. the number of coils equals the number of pairs of n and s poles on the rotor. the alternating current in the stator windings is rectified by the diodes and applied to the regulator. by controlling the amount of field current, the magnetic field strength is controlled and hence the output voltage of the alternator. referring to figure 7, a typical application diagram, the oscillator frequency is set by an external capacitor connected between osc and ground. the sawtooth waveform ramps between 1.0 v and 3.0 v and provides the timing for the system. for the circuit shown the oscillator frequency is approximately 140 hz. the alternator voltage is sensed at terminal a via the resistor divider network r1/r2 on the sense pin of the ic. the voltage at the sense pin determines the duty cycle for the regulator. the voltage is adjusted by potentiometer r2. a relatively low voltage on the sense pin causes a long duty cycle that increases the field current. a high voltage results in a short duty cycle. the ignition terminal (i) switches power to the ic through the v cc pin. in the cs3351 the stator pin senses the voltage from the stator. this will keep the device powered while the voltage is high, and it also senses a stopped engine condition and drives the lamp pin high after the stator timeout expires. the lamp pin also goes high when an overvoltage condition is detected on the sense pin. this causes the darlington lamp drive transistor to switch on and pull current through the lamp. if the system voltage continues to increase, the field and lamp output turn off as in an overvoltage or load dump condition. the sc or short circuit pin monitors the field voltage. if the drive output and the sc voltage are simultaneously high for a predetermined period, a short circuit condition is assumed and the output is disabled. the regulator is forced to a minimum short circuit duty cycle. figure 3. iar system block diagram batt ignition switch regulator a gnd i s field field winding stator winding lamp indicator
cs3341, cs3351, cs387 http://onsemi.com 6 regulation waveforms the cs3341/3351/387 utilizes proportion control to maintain regulation. waveforms depicting operation are shown in figures 4, 5 and 6, where v bat/n is the divided down voltage present on the sense pin using r1 and r2 (figure 7). a sawtooth waveform is generated internally. the amplitude of this waveform is listed in the electric parameter section as proportion control. the oscillator voltage is summed with v bat/n , and compared with the internal voltage regulator (v reg ) in the regulation comparator which controls the field through the output ?device driver.? figure 4 shows typical steady?state operation. a 50% duty cycle is maintained. figure 5 shows the effect of a drop in voltage on (v bat/n + v osc ). notice the duty cycle increase to the field drive. figure 6 shows the effect of an increase in voltage (above the regulation voltage) on (v bat/n + v osc ) . notice the decrease in field drive. ?? ?? ?? ?? ?? ?? figure 4. 50% duty cycle, steady state figure 5. > 50% duty cycle, increased load figure 6. < 50% duty cycle , decreased load v reg v bat/n + v osc v reg v reg v bat/n + v osc field driver on field driver on field driver on v bat/n + v osc figure 7. typical application diagram d1 c3 battery 2n6284 power darlington power ground r4 18 k c1 0.1 f r2 50 k 0.047 f c4 0.022 f r6 20 k r9 2.4 k gnd driver sc stator stator rectifier s a f i field lamp indicator r10 510 ignition switch r7 mpsa13 or cs299 *note: c2 optional for reduced jitter. lamp v cc sense osc ign *c2 10 f r1 100 k r5 10 k r3 250 10 mr2502 mr2502 mr2502
cs3341, cs3351, cs387 http://onsemi.com 7 488 m 506 m 510 m 762 m 742 m 1.96 mm 506 m 506 m 594 m 605 m 1000 m 2.07 mm figure 8. flip chip dimensions and solder bump locations, bump side up
cs3341, cs3351, cs387 http://onsemi.com 8 package dimensions soic?14 d suffix case 751a?03 issue g ?a? ?b? g p 7 pl 14 8 7 1 m 0.25 (0.010) b m s b m 0.25 (0.010) a s t ?t? f r x 45 seating plane d 14 pl k c j m notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. dim min max min max inches millimeters a 8.55 8.75 0.337 0.344 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 bsc 0.050 bsc j 0.19 0.25 0.008 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.228 0.244 r 0.25 0.50 0.010 0.019 package thermal data parameter soic?14 unit r jc typical 30 c/w r ja typical 125 c/w on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y 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 wi thout 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 application s 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. scillc products are not designed, intended, or authorized 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 application in which the failure of the scillc product could create a sit uation 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 of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800?282?9855 toll free usa/canada japan : on semiconductor, japan customer focus center 2?9?1 kamimeguro, meguro?ku, tokyo, japan 153?0051 phone : 81?3?5773?3850 cs3341/d literature fulfillment : literature distribution center for on semiconductor p.o. box 61312, phoenix, arizona 85082?1312 usa phone : 480?829?7710 or 800?344?3860 toll free usa/canada fax : 480?829?7709 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : http://onsemi.com order literature : http://www.onsemi.com/litorder for additional information, please contact your local sales representative.
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