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AL1692-30B document number: ds39499 rev. 3 - 2 1 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product dimmable led driver description t he al1692- 30b is a high performance, high power factor , high efficiency, and high current precision buck-boost and flyba ck dimmable led driver for triac dimmable led lamp applications. the al1692- 30b topology provides an accurate output current over wide line and load regulation. the wide switching frequency operates at boundary conduction mode (bcm) to ease emi/emc design and testing, to meet the latest regulatory standards. the al1692- 30b led driver integrates a 500v/3a high voltage mosfet. it can cover 120vac triac dimmable applications with eliminating the external high voltage mosfet and varistor, whic h will reduce the system bom cost. t he al1692- 30b has the built-in thermal fold-back protection trigger point to automatically r educe output current. other protection features enhance le d lighting system 's safety and reliability. t he al1692- 30b dimming curve is compliant with the nema ssl6 standard. the al1692- 30b applies to a wide range of dimmers, including leading edge and trailing edge dimmer, to achieve deep dimming down to 1%. the al1692- 30b is available in so-7 package. features ? tight current sense tolerance : 3% ? low startup current: 100a typical ? low operation current: 2 10 a (switching frequency at 4khz) ? single winding inductor ? wide range of dimmer compatibility ? integration of 500v/3a mosfet ? nema ssl6 dimming curve compliant ? internal protections ? under voltage lockout (uvlo) ? leading-edge blanking (leb) ? cycle- by -cycle over current protection (ocp) ? output open/short protection (ovp/osp) ? thermal foldback protection (tfp) ? over-temperature protection (otp) ? so -7 package ? totally lead-free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3 ) pin assignments (top vie w) 12 3 4 7 6 5 gnd comp rt vcc cs d fb so -7 applications ? mains dimmable led lamps ? offline led power supply driver notes: 1. no purposely added lead. fully eu directive 2002/95/ec (ro hs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more informa tion about diodes incorporateds definitions of halogen - and antimony-free, "green" and lead-free. 3. halogen- and antimony- free "green products are defined as those which co ntain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds.
AL1692-30B document number: ds39499 rev. 3 - 2 2 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product typical application circuits + rt gnd u1 AL1692-30B c5 r1 ac input fr1 db1 c1 comp r3 vcc d c4 d1 l2 r7 r6 r5 c2 c3 d2 r4 r2 l1 3 5 4 7 1 2 c6 fb r8 r9 6 cs leds al1692- 30b buck-boost application circuit pin descriptions pin number p in name function 1 vcc power supply voltage 2 rt resistor set the systems maximum t on 3 comp compensation for current control 4 gnd ground 5 fb feedback for led open protection voltage 6 cs current sensing 7 d drain of the internal high voltage mosfet
AL1692-30B document number: ds39499 rev. 3 - 2 3 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional block diagram v cc management fault management uvlo off vcc clamp otp ovp v dd v ref stop t on _ max r s q t ons detection (zcd) vcc ovp v ref_ovp ovp d vcc cs gnd rt driver supply clamp 2 7 1 6 4 set t on _ max t on _ max - + comp g m v ref sample and hold - + 3 5 fb - + stop ocp 1.6v al1692- 30b block diagram
AL1692-30B document number: ds39499 rev. 3 - 2 4 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product absolute maximum ratings (@ t a = +25c, unless otherwise specified.) (note 4) symbol parame ter rating unit v cc power supply voltage 18 v v d voltage on drain pin 5 00 v i ds continuous drain current t c = +25c 3 a v cs voltage on cs pin -0.3 to 7 v v rt voltage on rt p in -0.3 to 7 v v fb voltage on fb pin -0.3 to 7 v t j operating junction temperature -40 to + 150 c t stg storage temperature -65 to + 150 c t lead lead temperature (soldering, 10 seconds) +260 c pd power dissipation (t a = +50c) (note 5) 0.8 w ? ja ? thermal resistance (junction to ambient) (note 5) 123 c/w ? jc ? thermal resistance (junction to case) (note 5) 19 c/w C esd (human body model) 2, 000 v notes: 4. stresses greater than those listed under absolute maximum rating s may cause perman ent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyo nd those indicated under recommended operating conditions is not imp lied. exposure to absolute maximum ratings for extended periods ma y affect device reliability. all voltages unless otherwise stated and measured with respect to gnd. 5. device mounted on 1"x1" fr-4 substrate pcb, 2oz copper, with minimum re commended pad layout. recommended operating conditions (@ t a = +25c, unless otherwise specified.) symbol parameter min max unit t a ambient temperature (note 6) - 40 + 105 c v cc operating v cc voltage 10 v cc_ clamp (min) v note: 6 . the device may operate normally at + 125 c ambient temperature under the condition not trigger tempera ture protection.
AL1692-30B document number: ds39499 rev. 3 - 2 5 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product electrical characteristics (@ t a = +25c, unless otherwise specified.) symbol parameter condition min typ. max unit uvlo v th (st) start up voltage C C 14.5 C v v opr(min) minimal operating voltage after turn on C 8 .5 C v v cc_clamp v cc clamp voltage i cc = 1ma 14 15.5 C v standby current i st start-up current v cc = v th (st) -0.5v, before start up C 1 00 C a i cc (opr) operating current switching frequency at 4khz C 210 C a source driver r ds(on) lv internal low voltage mosfet on - state resistance (note 7) C C 1 C ? high voltage and super-junction mosfet r ds(on)hv drain-source on-state resistance C C 3.2 3. 6 ? v ds drain-source breakdown voltage C 5 00 C C v i dss drain-source leakage c urrent C C C 1 a rt v rt_ref reference voltage of rt pin C C 0.5 C v current sense v cs_clamp cs clamp voltage C C 1 .6 C v v ref internal current loop control reference C 0.388 0.4 0.412 v t on_min minimum t on C C 550 C ns t on_max maximum t on r t = 51k ? , v comp = 4v C 5.4 C s t off_min minimum t off (note 7) C C 4 C s t off_max maximum t off C C 290 C s fb v fb feedback voltage C 3.7 3.95 4.18 v i fb feedback pin input leakage current v fb = 2v C 4 C a error amplifier g m g m t rans -conductance C C 25 C a/v i source amplifier source current v cs = 0v C 10 C a i sink amplifier sink current v cs =1.5v C 28 C a thermal foldback and over temperature protection (otp) t fold thermal foldback (note 7) C C + 145 C c C thermal shutdown (notes7&8) C C +1 60 C c notes: 7. these parameters, although guaranteed by design, ar e not tested in production. 8. the device will latch off when otp happens, recovered after power cy cle and the device won t operate normally at this temperature.
AL1692-30B document number: ds39499 rev. 3 - 2 6 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product performance characteristics (note 9) start-up voltage vs. ambient temperature minimum operating voltage vs. ambient temperature start-up current vs. ambient temperature operating current vs . ambient temperature vcc clamp voltage vs. ambient temperature feedback voltage vs. ambient temperature note: 9. these electrical characteristics are tested under dc condition. the a mbient temperature is equal to the junction temperature of the devic e. -40 -20 0 20 40 60 80 100 120 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 start-up voltage (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 minimal operating voltage (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 70 80 90 100 110 120 130 start-up current ( ? a) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 150 160 170 180 190 200 210 220 230 240 operating current ( ? a) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 9.0 10.5 12.0 13.5 15.0 16.5 18.0 19.5 vcc clamp voltage (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v fb_ovp (v) ambient temperature ( o c)
AL1692-30B document number: ds39499 rev. 3 - 2 7 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional description and application information operation the al1692- 30b is a single stage, single winding, high efficiency, and high power fa ctor dimmable led driver for triac dimmable led lamp applications. the al1692- 30b integrates a 500v/ 3a high voltage mos fet, and it can cover 120vac triac dimmable applications with eliminat ing external high voltage mosfet and varistor. the al1692- 30b adopts source-driver technique to decrease the system operating current. it uses a novel method to detect the t off time which results in the removal for the need of an auxiliary winding. t he al1692- 30b operates at boundary conduction mode (bcm) which can ease emi design and achieve high efficiency. high power factor (hpf) is achieved by using constant on-time mode. coupled with a closed loop of constant current control , the al1692- 30b achieves good line and load regulation. start-up and supply voltage before start-up, the v cc capacitor c4 is charged by the startup resistors (r2, r3) from the high voltage mains. w hen the start-up voltage is reached, the al1692- 30b starts switching. during normal operation, the v cc supply is provided by start-up resisters (r2, r3) and t he output voltage (v out ) rectified by one diode (d2). in this way the system ca n provide v cc supply at low dimming angle. t he al1692- 30b has an internal vcc clamp voltage (typical 15.5v), which is limited by one internal active z ener diode. when vcc voltage drops to below the v opr(min) , switching is stop . s o the device can operate normally when the voltage on v cc pin is between v opr(min ) and vcc clamp voltage. protections under voltage lockout (uvlo) when the voltage on the vcc pin drops to below v opr(min) , the ic stops switching . the ic can restart when the voltage on vcc exceeds t he startup voltage (v th(st) ). leading-edge blanking (leb) to prevent false detection of the peak current of the indu ctor, a blanking time following switch-on is designed. when th e internal switch turns on, a short current spike can occur because of the capacit ive discharge of the voltage over the drain and source. it is disregarded during the leb time (t on_min ). cycle- by -cycle over current protection (ocp) the al1692- 30b has a built-in peak current detector. it triggers when the voltage on cs pin reaches the peak level v cs_clamp . the r5 is connected to the cs pin to sense the current of the inductor . the maximum peak current (i peak(max )) of the inductor can be calculated as below: ? ? _ 5 cs clamp peak max v i r ? (1) the detection circuit is activated after the leb time. w hen the detection circuit sense the cs voltage is higher t han 1v, the ic will turn off the switching to limit the output current. i t automatically provides protection for the maximum led curr ent during operation. a propagation delay exists between over current detection and actual source-switc h off, so the actual peak current is a little higher than the ocp level set by the r5. over-voltage protection and output-open protection (ovp) the output voltage is sensed by the fb pin, which provides an over-voltage protection (ovp) function. when the output is open or large transient happens, the output voltage will exceed the rated value (r8, r 9) . when the voltage exceeds v fb , the over-voltage is triggered and the ic will discharge v cc . w hen the v cc is below the uvlo threshold voltage, ic will re start and the v cc capacitor is charged again by start- up resistance. if the over voltage condition still exists, the system will wor k in hiccup mode.
AL1692-30B document number: ds39499 rev. 3 - 2 8 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional description and application information (cont.) output-short protection (osp) when led is short ed , the device can not detect the t off time, and the device controls the system operation at 4k hz low frequency. thermal foldback protection (tfp) al1692- 30b has a thermal foldback protection (tfp) function and adopts self-adaptive control method, which can prevent the system breaking down caused by high temperature. the overheating temper ature is set at + 145 c typical, when the junction temperature of the ic is hi gher than + 145 c typical, the device will linearly decrease the internal reference voltage to decrease the output current . as a result of this feature, the device can control the system s output power at high ambient temperature , to control the quantity of heat of the system. this enh ances the safety of the system at high temperature. thermal foldback waveform is shown below: 100% 50% j u n c t i o n t e m p e r a t u r e / c t fold =145 o u t p u t c u r r e n t otp figure 1. thermal foldback waveform over-temperature protection (otp) the al1692- 30b ha s over temperature protection (otp) function . when the junction temperature reach to + 16 0 c typical, the ic will trigger an over-temperature protection , which causes the device to shut down and latch ed condition. once otp triggered, the system need to be re sumed after the system s ac source supply has been reset and power up. design parameters setting the current sense resistor r5 the al1692- 30b adopts boundary conduction mode, the output current is calculated as below , _ 0 11 2 off o mean peak on off delay t i i dt t t t ? ? ? ? ? ? ?? ? (2) where, i peak is the peak current of the inductance t on is the internal mosfet on time t off is the freewheel diode d1 conduction time t delay is typical 0.4s t he al1692- 30b is a closed loop constant current control with the relat ionship between output current and current sense voltag e follows this equation 0 1 r5 off ref peak on off delay t v i dt t t t ? ? ? ? ? ? ?? ? (3)
AL1692-30B document number: ds39499 rev. 3 - 2 9 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional description and application information (cont.) where, v ref is the internal reference, typical 0.4v. r5 is the current sense resistor so we can get the output current equation as below, _ 1 = 25 ref o mean v i r ? (4) inductance selection ( l2 ) in buck-boost structure, the peak current of the indu ctance can be calculated as below _ 0 _ 2 sin( ) 5 sin( ) 2 sin( ) ref peak in rms in rms v i v rd v vo ? ? ? ?? ? ? ? ?? ?? ? ? ? ? (5) where, v in_rms is the input voltage s rms value v o is the system output voltage t he al1692- 30b controls the system op erat ing at boundary conduction mode which results in its operating frequency not being constant. to set the minimum switching frequency f min at the crest of the minimum ac input. _ _ 2 2 2+ in rms o peak in rms o min vv l i v v f ? ? ?? (6) according to the f araday s law, the winding number of the inductance can be calculated by: 2 2 peak l em li n ab ? ? ? (7) where, a e is the core effective area. b m is the maximum magnetic flux density. t on_max setting i n order to get a good dimmer compatibility and a good dimming d epth, the device sets a t on_max by one external resistor r t (r6). and the t on_max time has the below equation: _ _ 3.3 0.33 10 6 ref on max rt ref c t v ua r ? ? ? ? (8) where v rt_ref is the internal rt pin 0.5v s reference. c ref is the internal 1.5pf capacitor.
AL1692-30B document number: ds39499 rev. 3 - 2 10 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional description and application information (cont.) dimming control the al1692- 30b is a closed loop control device; the dimming function is re alized by t on_max limited when dimmer is connected in . when the dimmer is at the largest conduction angle, the device stil l has the adjustability to control the output current constant before comp voltage is adjusted to the maximum 4v, so for most of the dimmer, t he output current is almost the same with the no dimme r condition at the largest conduction angle. if the conduction angle is decreased, the comp pin voltage will continue to increase quickly till to th e maximum level (typical 4 v) , the device will output t on_max to limit system s output current. the t on_max is set by rt pin connect ed with one resistor, so the dimming depth can be adjust ed by rt resistor (r6). before the al1692- 30b enters t on_max mode, it keeps the output current constant the same as no dimmer condition. when enter t on_max mode, we can get the following equation: __ _ () 2 i n rms on max peak dim v sin t i l ? ?? ? (9) from the buck-boost output current equation, we can ge t the output current when dimming: _ _ _ 0 _ 1 25 () 2 ( ) 11 2 2 ( ) ref on on max o in rms peak di m in rms o v if t t r i v sin i d else v sin v ? ? ? ? ? ? ? ?? ?? ? ? ? ? ?? ? ?? ? ? ( 10 ) where, ? is the dimmer conduction angle. c o n d u c t i o n a n g l e ( d e g ) o u t p u t c u r r e n t ( % ) 1 0 0 0 1 8 0 t o n < t o n _ m a x t o n = t o n _ m a x c r i t i c a l c o n d u c t i o n a n g l e ? 0 figure. 2 dimming curve
AL1692-30B document number: ds39499 rev. 3 - 2 11 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product functional description and application information (cont.) dimm er compatibility passive bleeder design the passive bleeder is designed to supply latching and holding cu rrent to eliminate dimmer misfire and flicker. db1 c1 l1 r1 fr1 l n c2 passive bleeder damping figure.3 led driver schematic with passive bleeder the passive bleeder includes a capacitor (c2, in hundreds of n f) to provide latching current. a resistor (r1) is necessa ry to dampen the current spike. because a large c2 will affect the pf, thd and effic iency, the value of the capacitor (c2) should be selected a ccordingly. generally, 100nf/400v to 330nf/400v is recommended. r1 is used to limit the latching current, if r1 is too large, the latching current is not enough and the triac dimmer will misfire causing led flick er . if r1 is too small, it will result in greater power dissipa tion. generally speaking , a 200? to 2k? resistor is selected for r1. passive damping design fr -1 is the damper for reducing the spike current caused by quick charging of c2 at firing. in general, fr -1 is selected from 20? to 100? for low line like 120v ac application, and 5 1? to 200? for high line like 230v ac application. ordering information 30: 3.0a al1692-x x x C 13 mosfet voltage current option b: 500v s7 : so-7 package packing tape & reel part number package code package 13 tape and reel quantity part number suffix AL1692-30Bs7- 13 s7 so -7 40 00/tape & reel - 13
AL1692-30B document number: ds39499 rev. 3 - 2 12 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product marking information so -7 1692 - zzz (top view) yy ww x g part number 1692-30b for 3.0a/500v logo 7 6 5 1 2 3 4 yy : year : 15,16,17~ ww : week : 01~52; 52 represents 52 and 53 week x : t~z for cat t=sunday x=thursday u=monday y=friday v=tuesday z=saturday w=wednesday g: green compound package outline dimensions (all dimensions in mm.) (1) package type: so-7 3.800(0.150) 4.000(0.157) 1.270(0.050) typ 4.700(0.185) 5.100(0.201) 0.330(0.013) 0.510(0.020) 0.150(0.006) 0.250(0.010) 0.080(0.003) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.450(0.017) 0.800(0.031) 8 0 5.800(0.228) 6.200(0.244) 2.54(0.100) typ 1.250(0.049) 1.500(0.059) note: eject hole, oriented hole and mold mark is optional. option 2 45 0.350(0.014) typ option 1
AL1692-30B document number: ds39499 rev. 3 - 2 13 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product suggested pad layout (1) package type: so-7 z g e1 e x y dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) e1 (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 2.540/0. 100
AL1692-30B document number: ds39499 rev. 3 - 2 14 of 14 www.diodes.com october 2017 ? diodes incorporated new product al 1692 - 30b new product important notice diodes incorporated makes no warranty of any kind, expres s or implied, with regards to this document, including, but not limited to, the implied warranties of me rchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, correction s or other changes without further notice to this document and any produ ct described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product des cribed herein; neither does diodes incorporated convey a ny license under its patent or trademark rights, nor the rights of others. any custom er or user of this document or products described her ein in such applications shall assume all risks of such use and will agree to hold diodes incorpo rated and all the companies whose products are represe nted on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any lia bility whatsoever in respect of any products purchased through unauthorized sales channel. should customers purchase or use diodes incorporated prod ucts for any unintended or unauthorized application, cus tomers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. pro duct names and markings noted herein may also be covered by one or more unite d states, international or foreign trademarks. this document is written in english but may be translated int o multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporat ed. life support diodes incorporated products are specifically not auth orized for use as critical components in life support dev ices or systems without the express written approval of the chief executive officer of diodes i ncorporated. as used herein: a. life support devices or systems are devices or sy stems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perfor m when properly used in accordance with instructions for u se provided in the labeling can be reasonably expected to result in signi ficant injury to the user. b. a critical component is any component in a life sup port device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect i ts safety or effectiveness. customers represent that they have all necessary exp ertise in the safety and regulatory ramifications of their lif e support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concern ing their products and any use of diodes incorporated products in such safety-criti cal, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorpo rated. further, customers must fully indemnify diodes incor porated and its representatives against any damages arising out of the u se of diodes incorporated products in such safety-critic al, life support devices or systems. copyright ? 20 17 , diodes incorporated www.diodes.com

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