? 1.24v series voltage rerference with 10ma output current and 1% precision ? two operational amplifiers with ored output and 1mhz gain bandwidth product ? built-in current generator with enable/disable function ? 4.5 to 32v supply voltage range ? so8 and dip8 packages description the FTSM101A integrated circuit incorporates a high stability series band gap voltage reference, two ored operational amplifiers and a cur- rent source. this ic compares the dc voltage and the current level a the output of a switching power supply to an internal reference. it provides a feedback through an optocoupler to the pwm controller ic in the primary side. the controlled current generator can be used to modify the level of cur- rent limitation by offsetting the information coming from the current sen- sing resistor. applications this circuit is designed to be used in battery chargers with a constant voltage and a limited output current. it can be used in every types of application requiring a precision voltage regulation and current limitation. other applications include voltage supervisors, over voltage pin connections (top view) protection order code package part number temperature range n d kgm101ai -40oc, +105oc ? ? n = dual in line package (dip) d = small outline package (so) ? also available in tape & reel (dt) 1 3 4 2 8 6 5 7 + - + - vref n dip8 plastic package d so-8 plastic micropackage ordering number: FTSM101An plastic package FTSM101Ad plastic micropackage FTSM101A voltage and current controller
absolute maximum ratings symbol parameter value unit vcc dc supply voltage 1) 36 v i out output current 2) 20 ma p d power dissipation 200 mw v in input voltage 3) -0.3, vcc ? 1.5 v i out input current 1 ma t stg storage temperature -40 to +125 oc tj maximum junction temperature 150 oc 1. all voltages values, except differential volt age are with respect to network ground terminal. 2. the voltage reference is not prot ected against permanent short circuit 3. the magnitude of input voltages must never exceed -0.3v or vcc ? 1.5v. operating conditions symbol parameter value unit vcc supply voltage 4.5 to 32 v t oper operating free air temperature range t max to t min electrical characteristics t amb = 25oc, vcc = 15v (unless otherwise specified) operational amplifier symbol parameter min typ max unit i cc total supply current v cc = 1.5v 2 ma v i input voltage range 0 vcc-1.5v v v io input offset voltage 25oc t min d t amb d t max -5 -7 1 5 7 mv i ib input bias current @ v in = 1.2v on pin and v in = 0v on pin 5 25oc t min d t amb d t max -700 -1000 -300 0 0 na i sink output sink current, vol = 2.5v 25oc t min d t amb d t max 8 15 ma a vo large signal voltage gain r l = 2k : t min d t amb d t max 15 v/m v svr supply voltage rejection ratio t min d t amb d t max 65 90 db cmr common mode rejection ratio t min d t amb d t max 80 db gbp gain bandwith product v cc = 15v, f = 100khz v in = 10mv, r l = 2k : ,
electrical characteristics t amb = 25 oc, v cc = 15v ( unless otherwise specified) voltage reference kgm101a kgm101ac kgm101ai symbol parameter min typ max min typ max unit v ref reference voltage i out = 1ma, t amb =25oc 1.227 1.24 1.252 1.227 1.24 1.252 v kvt temperature stability t min d t amb d t max 30 100 35 120 ppm/oc r eglo load regulation 1 i out 10ma 5 15 5 15 mv r egli line regulation 5 v in 32v 3.5 10 3.5 10 mv current generator kgm101a kgm101c/ac kgm101i/ai symbol parameter min typ max min typ max unit i o current source 1.4 1.4 ma k cgt temperature stability t min d t amb d t max 500 600 ppm/oc c glir line regulation 4.5 v cc 32v 0.003 0.03 0.003 0.03 ma v csen voltage at the enable pin to have i o = 1.4ma t min d t amb d t max 0.6 0.6 v v csdis voltage at the enable pin to have i o = 0ma t min d t amb d t max 2 2 v i csen input current on the c sen pin t min d t amb d t max 30 30 p a i csleak leakage current v cs = 2v t min d t amb d t max 0.5 2 0.5 2 p a f t sm 101 a v ol t age and c urre nt co ntr oll er
1 vref gnd vrin csen crref crin vref 4 7 2 3 5 - + - + 8 +vcc 6 output FTSM101A voltage and current controller
08 01 05 04 02 03 07 06 06 04 01 11 09 14 13 12 10 08 07 05 03 02 08 01 05 04 02 03 07 06 06 04 01 11 09 14 13 12 10 08 07 05 03 02 08 01 05 04 02 03 07 06 06 04 01 11 09 14 13 12 10 08 07 05 03 02 bonding diagram of 08 01 05 04 02 03 07 06 06 04 01 11 09 14 13 12 10 08 07 05 03 02 bonding diagram of ftstm101a f t sm 101 a v ol t age and c urre nt co ntr oll er
06 04 01 11 09 y=0,0 x=0,0 x y 14 13 12 10 08 07 05 03 02 1.70 mm 1.65 mm pad size 01, 03 ? 05, 08 -11 for bonding pad size 02, 06, 07, 12 - 14 not for bonding pads location of FTSM101A f t sm 101 a v ol t age and c urre nt co ntr oll er
die size o r=1.70 mm, m r= 1.65 mm coordinates of pads coordinates left bottom, mkm pad size, mkm no of pad o m 01 136 1417 100x100 02 132 1003 70x70 03 136 744 100x100 04 136 481 100x100 05 136 117 100x100 06 302 144 70x70 07 564 144 70x70 08 1487 171 100x100 09 1467 826 100x100 10 1467 1222 100x100 11 1467 1398 100x100 12 633 1441 70x70 13 478 1441 70x70 14 326 1441 70x70 description name no of pad pin type function v ref 01 01 output voltage referenc e output 1.24v, 10ma max. do not short circuit v rin 10 07 input voltage r egulation loop input c rin 08 05 input current limitation loop inpu t, connected to the sense resistor c rref 04 03 input current limi tation reference input c sen 03 02 input current source enable input. this current source can be used to offset the voltage measurement on the sense resistor and therefore to modify the charge current. the current source enabled when the input voltage on pin 2 is lower than 0.8v output 09 06 output output pin common to t he voltage regulation and cu rrent limitation loops. this output can drive the prim ary side (led) of an optocoupler v cc 11 08 input power supply input (4.5 to 32v dc) gnd 05 04 input ground f t sm 101 a v ol t age and c urre nt co ntr oll er
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