unisonic technologies co., ltd uac33092 linear integrated circuit www.unisonic.com.tw 1 of 9 copyright ? 2011 unisonic technologies co., ltd qw-r121-003,c alternator voltage regulator ? description the uac33092 is specifically designed for voltage regulation and load response control (lrc) of di ode rectified alternator charging systems, as commonly found in automotive applications. in maintaining system voltage, the uac33092 monitors and compares the system battery voltage to an externally programmed set point value and pulse width modulates an n?channel mosfet transistor to control the average alternator field current. ? feature *forced load response control (lrc) with heavy load transitions at low rpm *capable of regulating voltage to 0.1 v @ 25 *operating frequency selectable with one external resistor *< 0.1 v variation over speed range of 2000 to 10,000 rpm *< 0.4 v variation over 10% to 95% of maximum alternator output *maintains regulation with external loads as low as 1.0 a *load dump protection of lamp, field control devices, and loads *duty cycle limit protection *provides high side mosfet control of a ground referenced field winding *controlled mosfet and flyback diode recovery characteristics for minimum rfi *optional 2.5 or 10 sec. lrc rate control (osc. freq. = 280 khz) *undervoltage, overvoltage and phas e fault (broken belt) detection sop-24 sop-20 ? ordering information ordering number lead free halogen free package packing uac33092l-s20-r uac33092g-s20-r sop-20 tape reel uac33092l-s20-t uac33092g-s20-t sop-20 tube uac33092l-s24-r uac33092g-s24-r sop-24 tape reel UAC33092L-S24-T uac33092g-s24-t sop-24 tube
uac33092 linear integrated circuit unisonic technologies co., ltd 2 of 9 www.unisonic.com.tw qw-r101-017,c ? pin configurations 20-pin package 12 11 9 10 2 1 20 19 18 17 16 15 14 13 5 6 7 8 4 3 oscillator adjust remote sense filter buffer lamp base lamp collector phase v ref0 oscillator gnd gnd gate source undervoltage v ref gnd rate supply regulation vcc3 vcc1 nc 24-pin package 14 13 11 12 16 15 9 10 2 1 24 23 22 21 20 19 18 17 5 6 7 8 4 3 oscillator adjust remote sense filter buffer lamp base lamp collector phase v ref0 oscillator gnd nc gnd nc nc nc gate source undervoltage v ref gnd rate supply regulation vcc3 vcc1 nc
uac33092 linear integrated circuit unisonic technologies co., ltd 3 of 9 www.unisonic.com.tw qw-r101-017,c ? pin description 20-pin package 24-pin package pin no. pin name description 1 1 fb this pin provides a filtered result of t he sense input (if the sense input is used) or the supply regulation input (if the sense input is not used). 2 2 sense the sense input is a remote, low current battery voltage reference input used to give an accurate representation of the true battery voltage. this input is also used to monitor overvoltage or load dump conditions. 3 3 lamp collector and power-up/do wn this pin connects to the collector of t he transistor (q2) used to drive the fault lamp. it is also used to sense a closed ignition switch (voltage sense) which then turns power on to the ic. 4 4 lamp base the lamp base pin provides base current to the fault lamp drive transistor (q2). 5 5 ground grounded to provide a ground return for the fault lamp control logic circuit. 6, 15 6,15 ground ic ground reference pins. 7 7 oscillator adjust a resistor to ground on this pin adjus ts the internal oscillator frequency. 8 8 v ref0 this is a test point for the 1.1v to 1.4v reference voltage. it has a zero temperature coefficient. the reference is used internally for phase signal and undervoltage detection. 9 9 oscillator test point for checking t he operation of the internal oscillator. 10 10 phase the phase input detects the existence of a magnetic field rotating within the alternator. 11 11 rate the rate pin is used to select a slow mode (floating) or fast mode (ground) load response control recovery rate. 12 12 supply regulation the voltage on the supply regulation pin is used as a representation of the alternator output voltage. this input also used to monitor overvoltage or load dump conditions. 13 13 v cc3 positive supply for the internal charge pump. 14 14 v cc1 positive supply for the entire ic except for the charge pump. 15,6 15,6 ground ground reference for the ic. 16 16,17,18, 19,20 n/c no connection. 17 21 gate controls the gate of the mosf et used to energize the field winding. 18 22 source field winding control mosfet source reference. 19 23 undervoltage if the voltage at this pin goes below 1.0 v, the fault lamp is guaranteed to turn on. the ic will continue to function, but with limited performance. 20 24 v ref test point for the 1.7 v to 2.3 v band gap reference voltage. this voltage has a negative temperature coeffici ent of approximately ?11 mv/ note: pins 8, 9, 20(20 pin package) and 24(24 pi n package) are test points only.
uac33092 linear integrated circuit unisonic technologies co., ltd 4 of 9 www.unisonic.com.tw qw-r101-017,c ? block diagram
uac33092 linear integrated circuit unisonic technologies co., ltd 5 of 9 www.unisonic.com.tw qw-r101-017,c ? absolute maximum ratings parameter symbol ratings unit power supply voltage load dump transient voltage (note 1) negative voltage (note 2) vbat +vmax ?vmin 24 40 -2.5 v sop-20 867 mw power dissipation (ta = 125 ) sop-24 p d 1000 mw operating junction temperature t j +150 c operating ambient temperature t opr -40 ~ +125 c storage temperature t stg -45 ~ +150 c note: 1. 125 ms wide square wave pulse. 2. maximum time = 2 minutes. 3. absolute maximum ratings are those val ues beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? electrical characteristics (ta=25 c, unless otherwise specified) parameter symbol test conditions min typ max unit dc characteristics regulation voltage (determined by external resistor divider) vreg 14.85 v regulation voltage temperature coefficient tc -13 -11 -9.0 mv/ suggested battery voltage operating range vbat 11.5 14.85 16.5 v power up/down threshold voltage (pin 3) vpwr 0.5 1.2 2.0 v i q1 vbat = 12.8 v, ignition off, ta = 25 1.3 2.0 ma standby current i q2 vbat = 12.8 v, ignition off, -40 t Q a Q 125 3.0 ma zero temperature coefficient reference voltage, (pin 8) v ref0 1.1 1.25 1.4 v band gap reference voltage [pin 20 (24**)] v ref 1.7 2.0 2.3 v band gap reference temperature coefficient tc -13 -11 -9.0 mv/ sense loss threshold (pin 2) sloss (th) 0.6 1.0 v phase detection threshold voltage (pin 10) p th 1.0 1.25 1.5 v phase rotation detection frequency (pin 10) p pot 36 hz undervoltage threshold [pin 19 (23**)] v uv 1.0 1.25 1.5 v overvoltage threshold (pin 2, or pin 12 if pin 2 is not used) v ov 1.09(v ref ) 1.12(v ref ) 1.16(v ref ) v load dump threshold (pin 2, or pin 12 if pin 2 is not used) v ld 1.33(v ref ) 1.4(v r ef ) 1.48(v ref ) v
uac33092 linear integrated circuit unisonic technologies co., ltd 6 of 9 www.unisonic.com.tw qw-r101-017,c ? electrical characteristics(cont.) parameter symbol test conditions min typ max unit switching characteristics fundamental regulation output frequency, [pin 17 (21**)] f clock oscillator frequency divided by 4096 68 hz suggested clock oscillator frequency range, (pin 9) fosc determined by ex ternal resistor, r t 205 280 350 khz duty cycle [pin 17 (21**)] at start?up during overvoltage condition start dc ov dc 27 3.5 29 4.7 31 5.5 % low/high rpm transition frequency (pin 10) lrc freq 247 273 309 hz lrcs low rpm mode (lrcfreq < 247 hz), pin 11 = open (slow rat) 8.5 9.5 10.5 lrcf low rpm mode (lrcfreq < 247 hz), pin 11 = grounded (fast rate) 34 38 42 lrc duty cycle increase rate lrch high rpm mode (lrcfreq > 309 hz), pin 11 = don?t care (lrc mode is disabled) 409 455 501 %/sec note: ** for 24-pin package.
uac33092 linear integrated circuit unisonic technologies co., ltd 7 of 9 www.unisonic.com.tw qw-r101-017,c ? application circuit l o s t s e n s e c i r c u i t s i g n a l c o m b i n e r a n d s w i t c h l o w p a s s f i l t e r c o u n t e r b a n d g a p r e f e r e n c e p o w e r s u p p l y o u t p u t c o n t r o l l a m p c o n t r o l l o g i c c h a r g e p u m p p o w e r u p / d o w n c i r c u i t o s c i l l a t o r c o n t r o l l o g i c d i v i d e b y ( 1 / 1 2 / 4 8 ) c o u n t e r ( 2 8 ) d a c u p / d o w n c o u n t e r ( 2 4 ) p r e s c a l e r ( 2 4 ) u a c 3 0 9 2 1 f b 1 9 u v 2 0 v r e f 8 v r e f 0 v c c 1 1 4 v c c 3 1 3 1 7 g a t e 1 8 s o u r c e 3 l a m p c o l l . 4 l a m p b a s e 5 g n d 6 g n d 1 5 1 1 r a t e 9 o s c i l l a t o r 7 o s c . a d j u s t 1 0 p h a s e 1 2 s u p p l y r e g ( l o c a l ) 2 s e n s e < r e m o t e > b u f f x 1 + - + - + - + - + - b i a s u n d e r v o l t a g e l o a d d u m p o v e r v o l t a g e r e g u l a t e 1 2 4 8 r t r 2 r 1 1 2 . 5 k r 3 8 6 k 2 8 k 2 8 k 4 5 k n o t e s : r 1 = r 2 = 3 . 0 k t o 5 . 0 k r 3 = 1 0 k t o 1 5 k r t = 5 0 k t o 1 0 0 k 2 . 5 s e c 1 0 s e c 2 5 0 1 . 0 k s e n s e p h a s e b + s u p p l y m t b 3 6 n 0 6 e ( q 1 ) 2 0 k 2 . 0 k 2 . 0 k b s p 5 2 t 1 ( q 2 ) 1 0 m b 8 5 0 g r o u n d b a t t e r y a l t e r n a t e s t a t o r c o n f i g u r a t i o n s t a t o r 5 0 0 l a m p l g n i t i o n f i e l d f b 2 3 * * 2 4 * * 2 1 * * 2 2 * * ** for 24-pin package. +
uac33092 linear integrated circuit unisonic technologies co., ltd 8 of 9 www.unisonic.com.tw qw-r101-017,c ? typical characteristics i(tot) ma 0.3 -55 0.2 0.4 0.5 50 100 125 standby current vs. temperature ambient temperature, ta (c) standby current, i sb ( ma) 75 0.6 -25 0 25 0.7 0.8 i sb =current from vcc supply vcc=12.8v ( see figure 1) vc 1 =0.5v ( lgnition off) v pin2 =v pin12 =1.5v v pin10 =v pin11 =v pin19 ( 23** ) =0v 1.1 -55 1.0 1.2 1.5 50 100 125 turn-on voltage vs. temperature ambient temperature, ta (c) turn-on voltage, v on ( v) 75 1.6 -25 0 25 1.7 1.8 v on =voltage at pin 3 vcc=12.8v ( see figure 1) v pin2 =v pin12 =1.5v v pin10 =v pin11 =v pin19 ( 23** ) =0v 1.4 1.3 i(tot) ma -55 1.8 1.9 2.0 50 100 125 ambient temperature, ta ( c) reference voltage, v ref ( v) 75 2.1 -25 0 25 2.2 v ref =voltage at pin 20 ( 24** ) vcc=12.8v ( see figure 1) vc 1 =0.5v ( lgnition off) v pin2 =v pin12 =1.5v v pin10 =v pin11 =v pin19 ( 23** ) =0v reference voltage vs. temperature 1.21 -55 1.20 1.22 1.23 50 100 125 0tc reference voltage vs. temperature ambient temperature, ta (c) tc reference voltage, v ref0 ( v) 75 1.24 -25 0 25 1.25 1.26 v ref0 =voltage at pin 8 vcc=12.8v ( see figure 1) vc 2 =6.0v ( s1 colsed) v pin2 =v pin12 =1.5v v pin10 =v pin11 =v pin19 ( 23**) =0v 70 200 60 80 280 320 340 oscillator frequency vs. timing resistor frequency, f (khz) resistance, r t (k ) 300 100 220 240 260 110 90 360 vcc=14.8v (see figure 1) vc 2 =6.0v (s1 closed) 1.94 0 1.93 1.95 1.96 40 60 70 input voltage vs. output duty cycle duty cycle, dc (%) input voltage, v in (v) 50 2.5 10 20 30 2.0 3.0 90 100 80 vin=voltage at pin 2 or 12 duty cycle taken at pin 17(21**) vcc=14.8v (see figure 1) vc2=6.0v (s1 closed) v pin10 =1.5v@>309hz v pin11 =0v, v pin19(23**) =1.5v load dump protection r=resistance from pin 7 to ground f=frequency at pin 9 v pin2 =vp in10 =v pin12 =v pin19(23**) =1.5v vp in11 =0v note: ** for 24-pin package.
uac33092 linear integrated circuit unisonic technologies co., ltd 9 of 9 www.unisonic.com.tw qw-r101-017,c ? typical test circuit lost sense circuit signal combiner and switch low pass filter counter bandgap reference power supply output control lamp control logic charge pump power up/down circuit oscillator control logic divide by (1/12/48) counter (2 8 ) dac up/down counter (2 4 ) prescaler (2 4 ) uac3092 1 fb 23** uv 20 v ref 8 v ref0 vcc1 14 vcc3 13 17 gate 18 sourc e 3 lamp coll. 4 lamp base 5 gnd 6 gnd 15 11 rate 9 oscillator output 7 10 phase 12 supply reg (local) 2 sense (remote) buff x1 + - + - + - + - + - bias undervoltage load dump overvoltage regulate 12 4 8 rt 2.0k s1 vc1 vc2 2.0k 250 1.0k vcc figure 1. note: ** for 24-pin package 19 24** 21** 22** + utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expec ted to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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