TS19704 single-stage primary-side control with high pfc led driver 1/7 version: c12 sop - 8 description the TS19704 is a primary-side control ic, high effi ciency and simpler design with active power factor correction especially for led lighting applications. the ic ac hieves high power factor and low thd operation by discontinuous conduction mode (dcm) and constant on time. precise constant current control regulates a bout 3% accurate versus changes in input voltage and ou tput voltage. TS19704 also provides gate driving vo ltage clamping, vcc overvoltage protection and system out put open/short circuit protection to increase devic e performance. features primary-side feedback control universal input voltage from 90vac ~ 264vac built-in active power factor correction constant output current control dcm constant on-time topology good line and load regulation open-led protection on dmg pin over-voltage protection on vcc pin short-led protection cycle by cycle over current protection on cs pin over-temperature protection programmable switching frequency by rt pin gate driving voltage clamping application led down light led tube led par lamp led bulb ordering information part no. package packing TS19704cs rlg sop-8 2.5kpcs / 13 reel note: g denote for halogen free product application circuit pin definition : 1. rt 8. vint 2. dmg 7. comp 3. vcc 6. gnd 4. out 5. cs
TS19704 single-stage primary-side control with high pfc led driver 2/7 version: c12 absolute maximum rating (ta = 25 o c unless otherwise noted) parameter symbol range unit power supply pin v dd 40 v dmg voltage to gnd v dmg -0.3 to 40 v out voltage to gnd v out -0.3 to 40 v rt voltage to gnd v rt -0.3 to 5 v cs voltage to gnd v cs -0.3 to 5 v com voltage to gnd v com -0.3 to 5 v vint voltage to gnd v vint -0.3 to 5 v operating junction temperature rang t j -40 to + 125 c operating ambient temperature rang t opa -40 to +85 c storage temperature rang t stg -65 to +150 c lead temperature (soldering 5 sec) t lead 260 c power dissipation @ta=25 c p d 0.4 w thermal resistance junction to ambient ja 160 c/w esd rating (human body mode) v esd 2 kv electrical characteristics (v cc =15 , t a =25 , unless otherwise specified.) parameter symbol condition min typ max unit turn-on voltage v cc_on 17.2 18.2 19.2 v turn-off voltage v cc_off 9.5 10 10.5 v quiescent current i q -- 25 35 ua normal current consumption i cc -- 1 2 ma protection vcc voltage protection v ovpa 31 32 33 v output voltage protection v ovps 10 10.5 11 v cs limit voltage v ocph 1.2 1.25 1.3 v cs limit voltage(short circuit) v ocpl 0.3 0.33 0.36 v oscillator start up timer t str r rt =50kohm -- 240 -- us switch timer(with jitter) t s r rt =50kohm -- 24 -- us multiply multiply gain k p -- 12.5 -- v error amplifier transconductance g m 84 120 156 umho reference voltage v ref 2.475 2.5 2.525 v maximum sink current i com_sink -- 55 -- ua maximum source current i com_sour -- 55 -- ua
TS19704 single-stage primary-side control with high pfc led driver 3/7 version: c12 electrical characteristics (v cc =15 , t a =25 , unless otherwise specified.) parameter symbol condition min typ max unit driver rising time t rise v cc =20v, c o =0.1nf -- 100 -- ns falling time t fail v cc =20v, c o =0.1nf -- 40 -- ns output clamp voltage v o_clamp -- -- 16.5 v note 1: stresses listed as the above absolute maximum rati ngs may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyo nd 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 te st board in free air at ta=25c. note 3: trise and tfail are guarantee by design. note 4: devices are esd sensitive. handing precaution reco mmended. note 5: the device is not guaranteed to function outside i ts operating conditions. function block pin description pin no. name function 1 rt frequency setting. 2 dmg zero current demagnetization sensing. 3 vcc power supply pin for all internal circuit. 4 out power mos output pin. 5 cs input current sense pin. 6 gnd ground return for all internal circuitry. 7 com output pin of error amplifier. 8 vint integration output current signal pin.
TS19704 single-stage primary-side control with high pfc led driver 4/7 version: c12 application information function description the TS19704 is a constant current flyback controlle r with primary side control and pfc function for le d lighting applications. which controller is dcm operation wit h constant on time based regulator design. in other to achieve high power factor and good emi performance. this co ntrol algorithm fix i cs_pk in wide range variation of line voltage. we can design transformer critically by i cs(limit) function. the TS19704 are built-in functions of vc c over voltage protection, open led protection, short led protection, over temperature protection, and primar y side current limit, and gate clamp within. the TS19704 sense switch current from cs voltage mu ltiplier by tdis to provide the integral result(vint). the avarge vint is finally 2.5v(vref) by the system close loop feed back. the avarge output current can express as below. s p s p o_avg r k 2 2.5 n n i = pin detail description rt switch timer(ts) and start up timer(tstr) setup tst r = 10ts: 2250 r t t s)s( = m 225 r t t s) str( = m dmg the output voltage is reflected by the auxiliary wi nding(naux) voltage of flyback transformer, the dmg pin can sense output information to depart from start up vo ltage(v o_str ) and protection voltage(v o_ovp ). when dmg sense voltage under vo_str, the circuit wi ll work on short circuit protection, fstr=1/tstr, v cs _pk=0.35v, when dmg sense voltage over v o_ovp , the circuit will work on over voltage protection, it will latch out off until v cc under v cc _ off . 2 2 1 a s o_str r r r 3 n n v + = 2 2 1 ovps a s o_ovp r r r v n n v + =
TS19704 single-stage primary-side control with high pfc led driver 5/7 version: c12 pin detail description (continue) vcc power supply for the controller during normal opera tion. the controller will start up when v cc reaches 18v (typical) and will shut-down when v cc voltage is below 9.5v (typical). a decoupling capa citor should be connected between the v cc and gnd pin as close as possible. the TS19704 perf orm v cc over voltage protection though v cc pin. once v cc pin exceed in 32v, TS19704 turns off and latch out the mosfet switcher until v cc under v cc _o ff . out gate drive for external mosfet switch. gate clamp f unction within. cs mosfet current signal sensing for multiply(k p ) s cs(limit) r 1.25 i = gnd gnd is the reference node of internal circuit. com this is the output of the gm amplifier . connect with a suitable rc network to ground. vint the vint pin connect with a suitable capacitor to ground. it sav ed the integral result of the vcs multiplier by tdis,
TS19704 single-stage primary-side control with high pfc led driver 6/7 version: c12 sot-8 mechanical drawing unit: millimeters marking diagram y = year code m = month code for halogen free product ( o =jan, p =feb, q =mar, r =apl, s =may, t =jun, u =jul, v =aug, w =sep, x =oct, y =nov, z =dec) l = lot code
TS19704 single-stage primary-side control with high pfc led driver 7/7 version: c12 notice specifications of the products displayed herein are subject to change without notice. tsc or anyone on its behalf, assumes no responsibility or liability for any erro rs or inaccuracies. information contained herein is intended to provide a product description only. no license, express or implied, to any intellectual property rights is granted by this document. except as provided in tscs terms and co nditions of sale for such products, tsc assumes no liability wh atsoever, and disclaims any express or implied warr anty, relating to sale and/or use of tsc products includi ng liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, cop yright, or other intellectual property right. the products shown herein are not designed for use in medical, life-saving, or life-sustaining applica tions. customers using or selling these products for use i n such applications do so at their own risk and agr ee to fully indemnify tsc for any damages resulting from such i mproper use or sale.
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