View LV5026MC_5751832.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

51012 sy/42512 sy 20120323-s00003 no.a2042-1/16 specifications of any and all sanyo semiconductor co.,ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' s products or equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. the products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appli ances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliab ility and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the intended use. if there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. LV5026MC overview LV5026MC is a high voltage led drive controller which drives led current up to 3a with external mosfet. LV5026MC is realized very simple led circuits with a fe w external parts. it corresponds to various wide dimming controls including the triac dimming control. note) this LV5026MC is designed or developed for general use or consumer appliance. therefore, it is not permitted to use for automotive, communication, office equipment, industrial equipment. functions ? high voltage led controller ? short protection circuit ? various dimming control ? selectable reference voltage -triac & analog input & pwm input -internal 0.605v & external input voltage ? soft start function ? low noise switching system/skip frequency function ? built-in triac stabilized function - 5 stages skip mode frequency ? built-in circuit of detection of overvoltage of cs pin. - soft driving ? selectable switching frequency [50khz or 70khz, open: 50khz] specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum input voltage v in max (note1) -0.3 to 42 v ref_out, ref_in, rt, cs, pwm_d, acs -0.3 to 7 v out1 pin v out _abs -0.3 to 42 v out2 pin v out 2_abs -0.3 to 42 v allowable power dissipation pd max with specified board* 1.0 w continued on next page. bi-cmos ic led driver ic orderin g numbe r : ena2042a
LV5026MC no.a2042-2/16 continued from preceding page. parameter symbol conditions ratings unit junction temperature tj 150 c operating junction temperature topj (note2) -30 to +125 c storage temperature tstg -40 to +150 c *1 specified board: 58.0mm 54.0mm 1.6mm (glass epoxy board) note1) absolute maximum ratings represent the val ues which cannot be exceeded for any length of time. note2) even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high te mperature, high current, high voltage, or drastic temperature change, the reliability of the ic may be degraded. please contact us for the further details. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit input voltage v in 8.5 to 24 v * note : supply the stabilized voltage. electrical characteristics at ta = 25 c, v in = 12v, unless otherwise specified. parameter symbol conditions ratings unit min typ max reference voltage block built-in reference voltage vref 0.585 0.605 0.625 v vref v in line regulation vref_ln v in = 8.5 to 24v 0.5 % reference output voltage refout i refout = 0.5ma 3.0 v - maximum load refout_max 0.5 ma - equivalent output impedance refout_ro 10 under voltage lockout operation start input voltage uvloon 8 9 10 v operation stop input voltage uvlooff 6.3 7.3 8.3 v hysteresis voltage uvloh 1.7 v oscillation frequency fosc1 rt =open 40 50 60 khz fosc2 rt = ref_out 55 70 85 khz fosc1 switch voltage v osc 1 2 5 v fosc2 switch voltage v osc 2 0.5 v maximum on duty maxduty 93 % comparator input offset voltage (between cs and vref) v io _vr 1 10 mv input offset voltage (between cs and refin) v io _ri 1 10 mv input current i io sc 160 na i io ref 80 na cs pin max voltage vom 1 v malfunction prevention mask time tmsk 150 ns pwm_d circuit off voltage v off 2 5 v on voltage v on 0 0.6 v thermal protection circuit thermal shutdown temperature tsd *design guarantee 165 c thermal shutdown hysteresis tsd *design guarantee 30 c drive circuit out sink current i o i 500 1000 ma out source current i o o 120 ma minimum on time tmin 200 300 ns continued on next page.
LV5026MC no.a2042-3/16 continued from preceding page. parameter symbol conditions ratings unit min typ max triac stabilization circuit threshold of out2 v acs out2 = high [less than right record] 2.8 3.0 3.2 v out2 sink current i o 2i v in = 12v, out2 = 6v 0.6 ma out2 source current i o 2o v in = 12v, out2 = 6v 0.6 ma v cc current uvlo mode v in current i cc off v in < uvloon 80 120 a normal mode v in current i cc on v in > uvloon, out = open 0.8 ma v in over voltage protection circuit v in over voltage protection voltage v in ovp 24 27 30 v v in current at ovp i in ovp v in = 30v 0.7 1.0 1.5 ma cs terminal abnormal sensing circuit abnormal sensing voltage csocp 1.9 v *: design guarantee (value guaranteed by design and not tested before shipment) package dimensions unit : mm (typ) 3426a pin assignment sanyo : soic10 4.9 3.9 6.0 6 10 5 1 0.835 0.21 0.37 0.41 1.0 0.175 1.5 1.75 max pd max -- ta 0 0.2 0.4 0.6 0.8 1.2 --30 0 30 60 150 90 120 1.0 allowable power dispation, pd max - w ambient temperature, ta - c spesified board: 58.0 54.0 1.6mm 3 glass epoxy board LV5026MC (top view) 1 rt 2 ref_out 3 ref_in 4 cs 5 pwm_d 10 acs 9 out2 8v in 7 out 6 gnd
LV5026MC no.a2042-4/16 block diagram sample application circuit non isolation isolation built-in regulator reference voltage current limit comparater out gnd pwm_d ac_voltage sense comparater short protection circuit tsd oscilator uvlo ovp control logic s r q 3.0v 0.61v rt acs ref_in cs + - + - - out2 ref_out v in d3 c2 - + f1 ac input r2 r3 r1 l out2 v cc u1 8 LV5026MC ref_out 4 7 10 ref_in acs 9 2 3 5 1 out cs pwm_d rt gnd q1 6 d3 d7 c2 f1 d1 l1 ac input r2 r3 r1 q1 nd np ns c13 led 9pcs rd0306 out2 v cc u1 8 6 LV5026MC ref_out 4 7 10 ref_in acs 9 2 3 5 1 out cs pwm_d rt gnd - +
LV5026MC no.a2042-5/16 pin functions pin no. pin name pin function equivalent circuit 1 rt switching frequency selection pin. l or open : 50khz switching, h: 70 khz switching. in case of 70khz,connect rt pin to refout pin. on time vref-out (3v typ) rt gnd 1k 2 ref_out built-in 3v regulate out pin. if this function isn?t used , please connect to nothing. v in vref-out (3v typ) gnd 3 ref_in external led current limit setting pin. if less than vref (0.61v) voltage is in put, peak current value is used at the input voltage. if more than ref_in voltage is input, it is done at vref voltage. if this function isn?t used, please connect nothing. v in ref_in cs gnd 4 cs led current sensing in. if this terminal voltage exceeds vref (or ref_in), external fet is off. and if the voltage of the terminal exceeds 1.9v, LV5026MC turns to latch-off mod v in ref_in cs gnd 5 pwm_d pwm dimming pin.l or open: normal operation, h: stop operation. v in 200k 700k pwm_d gnd 6 gnd gnd pin. v in out gnd 7 out driving the external fet gate pin. 8 v in power supply pin. operation : v in > uvloon stop: v in < uvlooff switching stop : v in > v in ovp 9 out2 this pin drive the fet which is stabilized the triac dimming application. if acs is less than 3v, out2 turn high voltage. if this function isn?t us ed, please connect nothing. 1k v in out2 gnd 10 acs acs pin senses ac voltage. if this function isn?t used, please connect gnd. v in acs gnd
LV5026MC no.a2042-6/16 led current and inductande setting ? relation ship beween ref_in and cs pin voltage(power factor crrection(pfc)) the output current value is the average of the current value that flows during one cycle. the current value that flows into coil is a triangular wave shown in the figure below. make sure to set ipk so that (average of current value at one cycle) is equal to (led current value).ipk is set by the relationship between ref_in voltage and rcs voltage. this relationship make power factor correction (pfc).therefore, it is available to make led current a sine curve. ? setting zener voltage vzd depend on led voltage (vf). choose zener diode around vf (led voltage).when vac voltage is lower than vf, led operation is not normal. using zener diode prevents incorrect operating during vac voltage lower than vf. in detail, refer to [led current and inductance setting] in case of ref_in pin open, this error amplifier negative input(-) is under control of internal vref voltage (0.605vtyp). ipk = ( vac-vzd ) r2 r1+r2 rcs led current and inductance setting it is available to use both no-isolation and isolation applications. (for non-isolation application) the output current value is the average of the current value that flows during one cycle. the current value that flows into coil is a triangular wave shown in the figure below. make sure to set il_pk so that (average of current value at one cycle) is equal to (led current value). ipk: peak inductor current vf: led forward voltage drop vac: effective value, r.m.s value vref: built-in reference voltage (0.605v) vref_in: ref_in voltage (6 pin) rs: external sense resistor vzd: zener diode voltage (ref_in pin) reset ref_in clk q cs vref (0.605v typ) rcs a blockdiagram in outline + - - out l r1 r2 vzd fet current fet vac ref_in fet current t on off to ff to n vref (0.605v typ) reset ref_in clk q cs vref (0.605v typ) rcs a blockdiagram in outline + - - out vac l led r1 r2 vzd inductor current inductor current fet vac t on off ipk ipk = (vac-vf)/l t_c = vf/l t_d il = vac/l t t_c t_d fet_on fet_off t (1cycle) il = vf/l t ref_in vref (0.605v typ)/built-in reference iled slope is proportion to vac voltage (ref pin voltage)
LV5026MC no.a2042-7/16 given that the period when current flows into coil is dutyi = t _ c+t _ d t ipk 1 2 ( duty t )/ t = iled ipk 2 iled dutyi (1) since ipk vref _ in rcs rcs vfef _ in ipk = dutyi vfef _ in 2 iled (2) since formula for led current is different between on period and off period as shown above, ipk vac-v ? l t_c = v ? l t_d (3) since t_c + t_d = dutyi t , t_c = dutyi t - t_d (4) based on the result of (3) and (4), t_d = dutyi t vac-v ? vac (5) to obtain l from the equation (1), (3), (5), l v ? dutyi 2 iled dutyi t = vac - v ? vac = v ? 2 iled 1 ? osc vac - v ? vac ( dutyi ) 2 (6) since led and inductor are connected in serial in non-isol ation mode, led current flows only when ac voltage exceed vf. given that the ratio of inductor current to ac input is dutyac. dutyac = 90 - arcsin ( v ? 2 vrms ) 90 since the period when the inductor cu rrent flows are limited by dutyac, the formula (6) is represented as follows: l = v ? 2 iled 1 ? osc vac - v ? v in ( dutyi ) 2 90 - arcsin ( v ? 2 vrms ) 90 (7) ipk: peak inductor current vf: led forward voltage drop vac: effective value(r.m.s value) vref: built-in reference voltage (0.605v) vref_in: ref_in voltage (6 pin) rs: external sense resistor vzd: zener diode voltage (ref_in pin) 2 2 vrms vf vac (ac voltage, r.m.s) inductor current arcsin (vf/ 2vrms) arcsin ( 2vrms/ 2vrms) =90 (deg) arcsin (vf/ 2vrms)
LV5026MC no.a2042-8/16 (for isolation circuit) using the circuit diagram below, the wave form of th e current that flows to np and ns is as follows. current waveform flows to primary side and secondary. [inductance lp of primary side and sense resistor rs] if a peak current flow to transformer is represented as ipk_p, the power (pin) charged to the transformer on primary side can be represented as: pin = 1 2 lp ( ipk_p ) 2 ? osc (11) ipk_p = vac lp ton_p (12) lp = vac 2 ton _ p 2 ? osc 2 pin = vac 2 don _ p 2 2 pin ? osc (13) ( don_p = ton _ p t = ton_p ? osc ), to substitute the following to the formula below, . . . = pout pin (14) lp = vac 2 ton _ p 2 ? osc 2 pout = vac 2 don 2 2 pout ? osc (15) reset ref_in clk q cs vref (0.605v typ) + - - out vac lp (np) ls (ns) rcs r1 a blockdiagram in outline r2 vzd ip vac t t ipk_p = vac/lp to n _ p ipk_s = vf/ls to n _ s iout (ton_s) on off fet ref_in vref (0.605v)typ (primary side current) primary side secondary side is ipk_p ipk_s (secondary side current) ip (primary side) is (secondary side current) ip slope is proportion to vac voltage (ref pin voltage) t(1cycle) fet_off fet_on (ton_p) is = vf/ls to n _ s ip = vac/lp to n _ p
LV5026MC no.a2042-9/16 sense resistor is obtained as follows. rs = vref _ in ipk_p = vref _ in lp vac ton_p = vref _ in lp vac don_p t (16) [inductance ls of secondary side] since output current iout is the average value of current flows to transformer of secondary side iout = ipk_s ton _ s t 1 2 = ipk _ s don _ s 2 ( don_s = ton _ s t = ton_s ? osc ) (17) ipk_s = vout ls ton_s = vout ls = don _ s ? osc (18) ls = vout t don _ s 2 2 iout = vout don _ s 2 2 iout ? osc = vout 2 don _ s 2 2 pout ? osc (19) calculation of the ratio of transformer coil on primary side and secondary side since ratio and inductance of transformer coil is ns np = ls lp (20) substituted equations (15), (19) for (20) np ns = vac vout don _ p don_s (21) calculation of transformer coil on primary side and secondary side n = vac 10 8 2 b ae ? osc (22) b: variation range of core flux density [gauss] ae: core section area [cm 2 ] to use al (l value at 100t), n = l al 10 2 (23) l: inductance [ h] al: l value at 100t [uh/n 2 ] lg (air gap) is obtained as follows: lg = r 0 n 2 a e 10 2 l (24) r: relative magnetic permeability, r = 1 0: vacuum magnetic permeability 0 = 4 *10 -7 n: turn count [t] ae: core section area [m 2 ] l: inductance [h]
LV5026MC no.a2042-10/16 bleeder current cuircuit for triac dimmer 1. operating voltage setting acs pin voltage set operating voltage at out2. acs pin threshold volage is 3v typ. out2 operating voltage is set by r1 and r2. r1 and r2 is determined below. acs = vac r 2 r 1+ r 2 2. bleeder current setting rd set hold current at triac dimmer. bleeder current is set at rd depending on triac dimmer. a blockdiagram in outline a blockdiagram in outline acs vacs (3v typ) + - out2 rd r2 r1 vac voltage is low, out2 is high voltage triac dimmer, off bleeder circuit, on (out2; high) vacs (3v typ) min on min on on on on on on off off off vac acs out2 out
LV5026MC no.a2042-11/16 description of operation protection function tilte outline monitor point note 1 uvlo under voltage lock out v cc voltage 2 ocp over current protection cs voltage available fet current 3 ovp over voltage protection v cc voltage 4 otp (tsd) over temperature protection (thermal shut down) pn junction temperature 1. uvlo (under voltage lock out) if v in voltage is 7.3v or lower, then uvlo operates and th e ic stops. when uvlo operat es, the power supply current of the ic is about 80 a or lower. if v in voltage is 9v or higher, then the ic starts switching operation. 2. uvlo (under voltage lock out) the cs pin sense the current through the mos fet switch and the primary side of the tran sformer. this provides an additional level of protection in the event of a fault. if the voltage of the cs pin exceeds vcsocp (1.9v typ) ( a ), the iternal comparator will detect the event and turn of f the mosfet. the peak switch current is calculated io (peak) [a] = vsocp [v]/rsense [ ] the v cc pin is pulled down to fixed level, keeping the contro ller lached off.the lach reset occurs when the user disconnects led from vac and lets the v cc falls below the v cc reset voltage, uvlooff (7.3v typ)( b ). then v cc rise uvloon (9v typ) ( c ), restart the switching. v in voltage v cc voltage time uvloon (9v typ) uvlooff (7.3v typ) on a b on off outputstage v in voltage cs voltage time time csocp (1.9v typ) uvloon (9v typ) uvloff (7.3v typ) ac b on on off outputstage
LV5026MC no.a2042-12/16 3. ovp (over voltage protection) if the voltage of v in pin is higher than the internal reference voltage v in ovp (27v typ), switching operation is stopped. the stopping operation is kept until the voltage of v in is lower than 7.3v. if the voltage of v in pin is higher than 9v, the switching operation is restated. 4. tsd (thermal shut down protection) the thermal shutdown function works when the junction temperature of ic is 165 c (typ) ( a ), and the ic switching stops. the ic starts switching operation again when the junction temperature is 135 c typ ( b ) or lower. skip frequency function LV5026MC contains the skip frequency function for reduction of the peak value of conduction noise. this function changes the frequency as follows. switching frequency is changed as follows. 0.9 1.1 1.05 1 0.95 0.9 1.1 it?s repeated by this loop. v in voltage operation start ovp reset ovp time time 9v typ 7.3v typ 27v typ on c a b on off outputstage time time tsd (design target) 165 c 135 c a b on on off outputstage tj (junction tmperature) uvlo unlocked v in out 45k 45k 50k 55k 52.5k 47.5k skip frequency function
LV5026MC no.a2042-13/16 pwm dimmer function led current can be adjusted according to duty of pwm pu lse input to pwm dimmer pin. pwm pulse is high (2v to 5v) then switching operation stops, and led current stops fl owing. pwm pulse is low (und er 0.6v), then switching operation stop is released, and it returns to normal operation. an outline of pwm_d pin led current vs pwm_d duty (outline) pwm_d threshold voltage, 1.5v (typ). (note) at pwm_d pin, input voltage is, 2v avove - output off 0.6v below - output on led current max 0 0 [%] 100 [%] pwm_d duty (high side) [%] a c pwm_d out (fet gate) out (fet gate) fet current (cs voltage) pwm_d h l pwm_d h l outputage on off
LV5026MC no.a2042-14/16 vref ? ta 0.58 0.59 0.6 0.61 0.62 0.63 2.8 2.9 3 3.1 3.2 --50 50 0 100 0 50 100 0 50 100 0 50 100 0 50 100 0 50 100 0 50 100 0 50 100 150 150 ambient temperature, ta -- c refout ? ta reference output voltage, refout -- v --50 ambient temperature, ta -- c uvloon, uvlooff ? ta operation start input voltage,operation stop input voltage, uvloon, uvlooff -- v 5 6 7 8 9 10 --50 150 ambient temperature, ta -- c uvloh ? ta hysteresis voltage, uvloh -- v 0 0.5 1 1.5 2 2.5 3 --50 150 ambient temperature, ta -- c built-in reference voltage, vref -- v ambient temperature, ta -- c fosc1 ? ta frequency, fosc1 -- khz 40 45 50 55 60 --50 150 ambient temperature, ta -- c fosc2 ? ta frequency, fosc2 -- khz 60 65 70 75 80 --50 150 ambient temperature, ta -- c v io _vr ? ta input offset voltage, v io _vr -- v --0.005 --0.003 --0.001 0.001 0.003 0.005 --50 150 ambient temperature, ta -- c v off , v on ? ta off voltage, on voltage, v off ,v on -- % 1 1.2 1.4 1.6 1.8 2 --50 150 v in = 12v uvlooff uvloon iref_out = 0.5ma v in = 12v v in = 24v v in = 8.5v v in = 24v v in = 8.5v v in = 12v v in = 24v v in = 8.5v
LV5026MC no.a2042-15/16 i o o ? ta 0 0.05 0.1 0.15 0.2 0 500 1000 1500 2000 --50 50 0 100 1 2 3 0 50 100 0 50 100 0 50 100 0 50 100 0 50 100 150 4 output voltage, v o -- v i o i ? v o out sink current, i o i -- ma 0 ambient temperature, ta -- c v acs ? ta threshold of out2, v acs -- v 2.8 2.9 3 3.1 3.2 --50 150 ambient temperature, ta -- c i o 2i ? ta out2 sink current, i o 2i -- ma 0 0.5 1 1.5 2 --50 150 ambient temperature, ta -- c out source current, i o o -- a ambient temperature, ta -- c i o 2o ? ta out2 source current, i o 2o -- ma 0 0.5 1 1.5 2 --50 150 ambient temperature, ta -- c i cc off ? ta uvlo mode v in current, i cc off -- a 0 50 100 150 200 --50 150 ambient temperature, ta -- c i cc on ? ta normal mode v in current, i cc on -- ma 0 0.5 1 1.5 2 --50 150 v in = 12v v in = 24v v in = 8.5v ta = 150 c ta = -40 c ta = 125 c ta = 80 c ta = 25 c ta = 0 c
LV5026MC ps no.a2042-16/16 sanyo semiconductor co.,ltd. assumes no responsib ility 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 sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-quality high-reliab ility pr oducts, however, any and all semiconductor products fail or malfunction with some probab ility. it is possible that these pr obab ilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equip ment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor co.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of may, 2 012. specifications and info rmation herein are subject to change without notice. v in ovp ? ta 25 26 27 28 29 30 0 0.5 1 1.5 2.5 2 3 --50 50 0 100 0 50 100 150 150 ambient temperature, ta -- c csocp ? ta abnormal sensing voltage, csocp -- v --50 ambient temperature, ta -- c v in over voltage protection voltage, v in ovp -- v

▲Up To Search▲

Price & Availability of LV5026MC

	To Download LV5026MC Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .