ts19601 700ma high voltage adjustable current regulator with enable control 1/8 version: b11 to - 252 - 5l (ppak) general description the ts19601 is a high voltage, low dropout current regulator of maximum output current up to 700ma. th e output current is decided by an external resistor, and the output sink current could be disabled via oe pin. ts19601 internally also build-in thermal protection to prev ent the chip over heat damage. features 0.5v v drop @ 700ma 700ma maximum output current output current controlled by external resistor 3s fast response output stage enable control output sustaining voltage up to 75v wide supply voltage range: 5~50v typical application circuit applications high power led driver rgb full color power led driver lcd monitor/tv led backlight driver led table lamp ordering information part no. package packing ts19601cp5 ro to-252-5l 2.5kpcs / 13 reel absolute maximum rating parameter symbol value unit input voltage v in 55 v output sustaining voltage v dsn 75 v output sink current i out 700 ma output enable voltage v e n 13.2 v operating junction temperature range t opr +150 oc storage temperature range t stg -55 ~ +150 oc thermal resistance junction to air ja 80 oc/w recommend operating conditions parameter symbol min typ max unit input voltage v in 5 -- 50 v output enable voltage v en -- -- 12 v output sink current t opr 100 -- 700 ma operating free-air temperature range t stg -40 -- +85 oc pin definition : 1. vin 2. iset 3. gnd 4. en 5. out
ts19601 700ma high voltage adjustable current regulator with enable control 2/8 version: b11 electrical specification ( v in =24v , t a =25 o c, unless otherwise specified.) parameter conditions min typ max unit output current v out =0.5v, r set =3k -- 200 -- ma v out =0.5v, r set =1.71k -- 350 -- v out =0.5v, r set =1k -- 600 -- output current deviation v out =0.5v, i out =350ma~600ma -- -- 5 % set current range 200 -- 1400 a minimum output current i set =200a -- 100 -- ma maximum output current i set =1400a -- 700 -- ma output dropout voltage i set =1000a (note 1) -- 0.35 -- v load regulation v out =0.5v to 3v, i out =350ma -- -- 3 ma/v line regulation v out =0.5v, i out =350ma, v in =5~50v -- 0.08 0.15 %/v enable low input voltage 0 -- 0.8 v enable high input voltage should lower than vin 2 - - 12 v enable low input current -20 -- +20 a enable high input current -5 -- +5 a output enable delay time en from low to high. v out =0.5v, i out =350ma, duty 50% -- 3 -- s output disable delay time en from high to low. v out =0.5v, i out =350ma, duty 50% -- 3 -- s supply current consumption -- -- 5 ma note 1 : output dropout voltage: duty 90% x i out @ v out =0.5v pin function description pin number pin name pin function 1 vin power supply pin 2 iset output current setting pin. connect a resistor from iset to gnd to set the led bias current. i set =1.2v/r set 3 gnd ground pin 4 en output stage enable control pin. high enable the ou tput pin. it can be left floating for normally on. 5 out output pin. sink current is decided by the current on r set connected to i set pin. i out =500 x i set =500 x 1.2v/r set
ts19601 700ma high voltage adjustable current regulator with enable control 3/8 version: b11 electrical characteristics curve figure 1. supply current vs. supply voltage figure 2. iset voltage vs. junction temperature figure 3. output current vs. supply voltage figure 4. output current vs. dropout voltage
ts19601 700ma high voltage adjustable current regulator with enable control 4/8 version: b11 application information ts19601 is a high voltage, low dropout current regu lator for maximum output current up to 700ma with o e pin control. the current could be linearly adjusted thr ough variable resister connected to iset pin, or by pwm control via oe pin. although the absolute maximum rating of out pin 75v, the dropout voltage between out pin a nd gnd pin should not be too large when current is sin king because of the thermal dissipation capability of the package. here are some of the typical application examples: dc voltage input any dc voltage level between 5v to 50v could be ado pted as power source vdd for typical application of ts19601 as long as vdd is larger than the total for ward voltage drop of the led string (at expecting c urrent) by 0.35v. if 50v ~ 60v voltage level is adopted as pow er source to positive end of the led string, one ze ner shunt regulator could be used to provide appropriate volt age to vdd pin.
ts19601 700ma high voltage adjustable current regulator with enable control 5/8 version: b11 application information (continue) led backlight solution ts19601 could coordinate with any type of dc-to-dc converter through feedback path to realized led bac klight module. the number of leds in the string is variabl e even with certain fixed power source since the ou tput voltage of the dc-to-dc converter could be modulated accord ing to feedback signal. ac voltage input ts19601 could work with any kind of well-known or w ell-developed switch-mode power supply system. simp ly cut off the internal feedback path of the power supply system and then feed the signal from ts19601 back t o the power supply system instead.
ts19601 700ma high voltage adjustable current regulator with enable control 6/8 version: b11 thermal consideration information the maximum power dissipation on current regulator p d(max) = v out(max) i out(nom) + v in(max) i dd v out(max) = the maximum voltage on output pin; i out(nom) = the nominal output current; i dd = the quiescent current the regulator consumes at i out(nom); v in(max) = the maximum input voltage. thermal consideration the ts19601 has internal power and thermal limiting circuitry designed to protect the device under ove rload conditions. however, maximum junction temperature r atings should not be exceeded under continuous norm al load conditions. the thermal protection circuit of ts196 01 prevents the device from damage due to excessive power dissipation. when the device junction temperature r ises to approximately 150c, the regulator will be turned off. when power consumption is over about 1000mw (to-252 package, at t a =70c), additional heat sink is required to control the junction temperature below 125c. the junction temperature is: t j = p d ( jt + cs + sa ) + t a p d : dissipated power. jt : thermal resistance from the junction to the mount ing tab of the package. for to-252 package, jt = 7.0c/w. cs : thermal resistance through the interface between the ic and the surface on which it is mounted. (typically, cs < 1.0c /w) sa : thermal resistance from the mounting surface to a mbient (thermal resistance of the heat sink). if pc board copper is going to be used as a heat si nk, below table can be used to determine the approp riate size of copper foil required. for multi-layered pcb, these layers can also be used as a heat sink. they can be connected with several through-hole vias. pcb ja oc/w 59 45 38 33 27 24 21 pcb heat sink size 500 1000 1500 2000 3000 4000 5000
ts19601 700ma high voltage adjustable current regulator with enable control 7/8 version: b11 to-252-5l mechanical drawing marking diagram y = year code m = month code ( a =jan, b =feb, c =mar, d =apl, e =may, f =jun, g =jul, h =aug, i =sep, j =oct, k =nov, l =dec) l = lot code to-252-5l dimension dim millimeters inches min max min max. a 6.350 6.730 0.250 0.265 b 9.080 10.440 0.357 0.411 c 0.460 0.640 0.018 0.025 d 1.27bsc 0.05bsc e 2.19 2.380 0.086 0.094 f 0.460 0.570 0.018 0.022 g 1.400 1.780 0.055 0.070 h 0.460 0.570 0.018 0.022 i 5.34 5.550 0.210 0.219 j 1.520 2.030 0.060 0.080
ts19601 700ma high voltage adjustable current regulator with enable control 8/8 version: b11 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 pa tent, copyright, or other intellectual property rig ht. 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.
|
