BW7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 1 features universal input voltage range from 90vac to 264vac transition-mode pfc operating built-in active power factor correction technique constant output current control led driver good line and load regulation open-led protection on dmg and vcc pin over-voltage protection on vcc pin short-led protection cycle by cycle over current protection on cs pin over-temperature protection gate driving voltage clamping sot26 package available applications led lighting down light tube lamp par lamp bulb order information description BW7383 is a non-isolation buck type control ic with active power factor correction function for led lighting application. the ic achieves high power factor and high efficiency by bcm mode. the line and load regulation of led current is about 2.5% because of particular control method. BW7383 also provides gate driving voltage clamping, vcc over voltage protection and system output open/short circuit protection to increase ic performance. pin configurations (top view) bw 7383 - kf r circuit type bw shipping: r: tape & reel kf: sot-26 com gnd cs dmg out vcc 1 2 3 4 6 5 sot-26
BW7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 2 pin descriptions pin name pin description com output pin of error amplifier. gnd ground return for all internal circuit. cs input current sense pin. out gate driver output. vcc power supply pin for all internal circuit. dmg zero current demagnetization sensing. typical application circuits figure 1
BW7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 3 absolute maximum ratings (note 1) parameter symbol range unit power supply pin v cc 40 v dmg voltage to gnd v dmg -0.3 to 40 v out voltage to gnd v out -0.3 to 40 v cs voltage to gnd v cs -0.3 to 5.5 v com voltage to gnd v com -0.3 to 5.5 v junction temperature range tj -40 to +150 c storage temperature range t stg -65 to +150 c lead temperature (soldering 10 sec) t lead 260 c power dissipation @t a =25 c p d 0.3 w thermal resistance junction to ambient (note 2) ja 220 c/w thermal resistance junction to case jc 106.6 c/w esd rating (human body mode) (note 3) v esd 2 kv recommended operating conditions (note4) parameter symbol operation conditions unit power supply pin v cc 34.5 v dmg voltage to gnd v dmg -0.3 to 11.2 v out voltage to gnd v out -0.3 to 19 v cs voltage to gnd v cs -0.3 to 5 v com voltage to gnd v com -0.3 to 5 v operating junction temperature range t j -40 to +125 c operating ambient temperature range t opa -40 to +85 c note 1: stresses listed as the above absolute maximum ratings may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. note 2: thermal resistance is specified with the component mounted on a low effective thermal conductivity test board in free air at t a =25 c. note 3: devices are esd sensitive. handing precaution recommended. note 4: the device is not guaranteed to function outside its operating conditions.
bw 7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 4 block diagram figure 2
bw 7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 5 electrical characteristics t a = 25c, unless otherwise specified. parameter symb ol condition min typ max unit turn-on voltage v cc_on 17.4 1 8.4 19.4 v turn-off voltage v cc_off 9.3 9.8 10.3 v quiescent current 1 i q1 vcc=17v, at vcc_off -- 30 50 ua quiescent current 2 i q2 start up at 4.5 khz -- 600 800 ua operation supply current i cc -- 2 .5 3.0 ma protection vcc voltage protection v ovpa 31.2 3 2.8 34.5 v output voltage protection v ovps 9.8 10.5 11.2 v cs limit voltage v ocp 1.15 1 .25 1.35 v short circuit protection(note 5) v o_str -- 2 -- v oscillator start up timer t str -- 2 20 -- us gm amplifier reference voltage v ref 195 200 205 mv transconductance g m -- 1 08 -- ua /v source current i comp_sou -- 20 -- ua driver dropout voltage v oh v cc =33v, i o = 10ma -- 1.2 1.5 v v ol v cc =33v, i o = -10ma -- 0.12 -- v rising time t rise v cc =20v, c o =1nf -- 40 -- ns falling time t fail v cc =20v, c o =1nf -- 80 -- ns output clamp voltage v o_clamp -- - - 19 v leading edge blanking time leb t -- 0 .5 -- ns otp (note 6) otp trip point -- 150 -- otp release point -- 115 -- otp threshold hysteresis -- 35 -- note 5: guaranteed by design. note 6: auto recovery type.
bw 7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 6 application information 1. function description the bw 7383 is a constant current buck c ont roller with pfc function for led lighting applications. the controller is bcm operation with constant on time based regulator design to achieve high power factor performance. the bw 7383 is built-in functions of vcc over v ol tage protection, open led protection, short led protection, over temperature protection, primary side current limit, and gate clamp within. the bw 7383 sense output current from cs pin t o g e t the output current information. by the system close loop feedback. the avarge output current can express as below. rs i out = 2. pin detail 2-1 . com this is the output of the gm amplifier . con nect with a suitable rc network to ground. 2-2. gnd gnd is the reference node of internal circuit. 2-3. cs mosfet current signal sensing for led cons tant current control and current limit setting function s cs(limit) r 1.25 i = 2- 4. out gat e drive for external mosfet switch and is built-in gate clamp function. 2-5. vcc power supply for the controller during normal oper ation. the controller will start up when vcc reaches 18.4v (typical) and will shut-down when vcc voltage is below 9.8v (typical). a decoupling capacitor should be connected between the vcc and gnd pin as close as possible. the bw 7383 perform vcc over voltage p ro t ection though vcc pin. once vcc pin exceed in 32.8v, bw 7383 turns off and latch out the m os fet switcher until vcc under v cc_off . 2-6. dmg the dmg pin can sense output information to depa rt from start up voltage(v o_str ) and protection volt age(v ovps ). besides, the internal resistance of dmg pin is 1.6mohm. when dmg sense voltage under v o_str , the circ uit will work on short circuit protection,and the system switching frequency f str =1/tstr. when dmg sense voltage over v ovps , the circ uit will work on over voltage protection, it will latch out off until vcc under v cc_off .
bw 7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 7 ovp protection (by dmg) //1.6m r //1.6m) rr v v dgm 2 dgm2 dgm1 ovp s dmg_ovp ? + = ov p protection (by vcc) zd1a vv v ovp vcc_ovp + = short circuit protection //1.6m r //1.6m) rr v v dgm 2 dgm2 dgm1 st ro shorto ? b b + =
bw 7383 6 pin non-isolation buck current control ic with high pfc for led lighting rev 1.1 jan. 2014 8 package outline dimensions
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