View FP6116DR-G1_7776174.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

fp6116 340khz, 3a, asynchronous step-down regulator this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 1/14 general description the fp6116 is a buck switching regulator fo r wide operating voltage application fields. the fp6116 includes a high current p-mosfet, a high precision reference (0.8v) for comparing output voltage with a feedback amplifier, an internal soft st art timer and dead-time controller. the oscillator is for controlling the maximum duty cycle and pwm frequency. features ? precision feedback reference voltage: 0.8v (2%) ? wide supply voltage operating range: 3.6 to 23v ? low current consumption: 3ma ? internal fixed oscillator frequency: 340khz (typ.) ? internal soft-sta rt function (ss) ? built-in p-mosfet for 3a output loading ? over current protection ? package: sop-8l typical application circuit
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 2/14 function block diagram pin descriptions sop-8l 9fa-86l fp6116 name no. i / o description fb 1 i error amplifier inverting input en 2 i enable control ocset 3 i set switch output over current v cc 4 p ic power supply (pmos source) lx 5 o pmos high current output lx 6 o pmos high current output gnd 7 p ic ground gnd 8 p ic ground
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 3/14 marking information halogen free : halogen free product indicator lot numbe r : wafer lot number?s last two digits for example: 132386tb ? 86 internal id : internal identification code per-half month : production period indicated in half month time unit for example: january a (front half month), b (last half month) february c (front half month), d (last half month) y ea r : production year?s last digit
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 4/14 ordering information part number operating temperature package moq description FP6116DR-G1 -25c ~ +85c sop-8l 2500 ea tape & reel absolute maximum ratings parameter symbol conditions min. typ. max. unit power supply voltage v cc 23 v output source current 5 a error amplifier inverting input -0.3 1.2 v allowable power dissipation p d sop-8l t a +25 Q c 650 mw junction to ambient thermal resistance ja +110 c / w operating temperature -25 +85 c hbm (human body mode) 2 kv esd susceptibility mm (machine mode) 200 v storage temperature t s sop-8l -55 +125 c sop-8l lead temperature (soldering, 10 sec) +260 c ir re-flow soldering curve
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 5/14 recommended operating conditions parameter symbol conditions min. typ. max. unit supply voltage v cc 3.6 23 v operating temperature -25 85 c dc electrical characteristics (v cc =6v,t a = 25c, unless otherwise noted) parameter symbol conditions min. typ. max. unit reference feedback voltage v ref 0.784 0.8 0.816 v input regulation v ref / v ref v cc =3.6 v to 23 v 1 2 % feedback voltage change with temperature v ref / v ref t a =-25 c to +85 c 1 2 % oscillator section oscillation frequency f measured from lx pin waveform 340 khz short circuit or over current oscillation frequency f sc measured from lx pin waveform 50 khz frequency change with voltage f / v v cc =3.6v to 23v 5 % frequency change with temperature f / t t a = -25 c to +85 c 5 % idle period adjustment section maximum duty cycle t duty v fb =0.2v 80 % output section pmos switch current i lx -3 a v cc =4.5v 70 95 m pmos on resistance r ds (on) v cc =10v 50 60 m thermal shutdown section thermal shutdown temperature +150 c over current protection section ocset bias current i ocset 40 a total device section en pin input current i en v en =2.5v 20 a en pin on threshold v upper en pin upper 1.1 v en pin off threshold v low en pin low 0.85 v en pin hysteresis v hys 200 250 mv supply shutdown current i sd v en =0v 2 10 a supply average current i ave 3 6 ma
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 6/14 typical operating characteristics load regulation v in =12v 3.35 3.37 3.39 3.41 3.43 3.45 3.47 3.49 3.51 3.53 3.55 0 0.5 1 1.5 2 2.5 3 i out (a) v out (v) line regulation i out =200ma 3.418 3.42 3.422 3.424 3.426 3.428 3.43 3.432 3.434 3.436 3.438 0 5 10 15 20 v in (v) v out (v) supply current vs. v in 3.2 3.25 3.3 3.35 3.4 3.45 3.5 0 5 10 15 20 v in (v) supply current (ma) supply current vs. temperature 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 -40-200 20406080100 temperature ( ) supply current (ma) oscillator frequency vs. v in v out =3.3v i out =200ma 340 342 344 346 348 350 352 354 356 358 360 0 5 10 15 20 v in (v) oscillator frequency(khz ) current limit vs. v in 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 0 5 10 15 20 v in (v) current limit (a) rset=3k ocset resistance vs. current limit 2 2.5 3 3.5 4 4.5 2 2.5 3 3.5 4 4.5 5 ocset resistance (k ? ) current limit (a) current limit vs. temperature 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 -40-20 0 20406080100 temperature ( ) current limit (a) rset=3.9k
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 7/14 efficiency efficiecncy (v in =12v,l=22uh) 50 60 70 80 90 0 0.5 1 1.5 2 2.5 3 i out (a) efficiency (%) vout=3.3v vout=5v output ripple (v in =12v v out =3.3v i out = 3a) ch1 lx ch2 v out en on test (v in =12v v out =3.3v iout=3a) ch1 en ch2 lx ch3 v out ch4 i lx efficiency efficiecncy (v in =5v,l=22uh) 50 60 70 80 90 100 00.511.5 22.53 i out (a) efficiency (%) vout=3.3v vout=2.5v transient response (v in =12v v out =3.3v i out =0.1a to 3a) ch3 v out ch4 i lx power on test (v in =12v v out =3.3v i out =3a) ch1 v in ch2 lx ch3 v out ch4 i lx
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 8/14 function description voltage reference a 2.5v reference regulator suppl ies fp6116 internal circuits and uses a resistive divider to provide 0.8v precision reference voltage on t he non-inverting terminal of error amplifier. error amplifier the error amplifier compares a sample of t he dc-dc converter output voltage to the 0.8v (v ref ) reference and generates an error signal for the pwm comparator. output voltage of the dc-dc converter is setting by the resistor divide r with following expression (see fig. 1) ref 1 2 out v r r 1 v ? ? ? ? ? ? ? ? ? ? ? 1 0.8v 36k v out r 2 r 1 fp6116 error amplifier figure 1 error amplifier with feedback resistance divider the recommended resistor value is summarized below: v out (v ) r 1 (k ) r 2 (k ) 1.8 2.4k 3k 2.5 3.2k 6.8k 3.3 1.5k 4.7k 5 2k 10.5k
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 9/14 oscillator the fixed frequency is generated by an internal rc oscillator. its typical value is 340khz in normal operation and 50khz in short circuit condition. thermal protection when a heavy loading draws current from the regulat or, the chip temperature will rise. once the junction temperature exceeds 150 , fp6116 thermal protection function will be triggered and the lx output will be turned off. when junction temperature is lower, fp6116 starts again and enable lx pin output. over current protection the fp6116 uses cycle-by-cycle current limit to protect the internal power switch. during each switching cycle, a current limit comparator detects if the power switch current exceeds the external setting current or not. once over current occurs, chip will decrease the oscillator frequency to prevent from thermal issue. the current limit thre shold is setting by external resistor (r 3 ) which is connecting from v cc to ocset pin. an internal 40 a current sink which draws current from the resistor sets the voltage at pin ocset. please refer to the following formula for setting the current limit value: ? ? ? m 20 r i i 3 ocset ocp here, 20m is internal sense resistance. example: a 4 . 4 m 20 k 2 . 2 a 40 i ocp ? ? ? ?
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 10/14 application information input capacitor selection the input capacitor must be connected between the v cc and gnd pin of the fp6116 to maintain steady input voltage and filter out the pulsing input cu rrent. the voltage rating of input capacitor must be greater than maximum input voltage plus ripple voltage. in switch mode, the input current is discontinuous in a buck converter. the source current of the high-side mosfet is a square wave. to prevent large voltage transients, a low esr input capacitor sized for the maximum rms current must be used. the rms value of input capacitor current can be calculated by: ? ? ? ? ? ? ? ? ? ? ? in o in o o rms v v 1 v v i i max it can be seen that when v o is half of v in , c in is under the worst current stress. the worst current stress on c in is i o_max / 2. inductor selection the value of the inductor is selected based on the desired ripple current. large inductance gives low inductor ripple current and small inductance result in high ripple current. however, the larger value inductor usually has a larger physical size, higher series resistance, and lower saturation current. on the experience, the value is to allow the peak-to- peak ripple current in the inductor to be 10%~20% maximum load current. the inductance value can be calculated by: ?? in o o o in in o l o in v v i %) 20 ~ % 10 ( 2 f ) v v ( v v i f ) v v ( l ? ? ? ? ? ? ? ? the inductor ripple current can be calculated by: ? ? ? ? ? ? ? ? ? ? ? ? ? in o o l v v 1 l f v i choose an inductor that does not saturate u nder the worst-case load conditions, which is the load current plus half the peak-to-peak induct or ripple current, even at the highest operating temperature. the peak inductor current is: 2 i i i l o peak _ l ? ? ?
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 11/14 the inductors in different shape and style are av ailable from manufacturers. shielded inductors are small and radiate less emi issue. but they cost more than unshielded inductors. the choice depends on emi requirement, price and size . inductor value ( h) dimensions(mm) component supplier model 10 10.310.34.0 feng-jui tprh10d40-10r 10 10.110.13.0 sumida cdrh104r 15 10.310.34.0 feng-jui tprh10d40-15r output capacitor selection the output capacitor is required to maintain the dc output voltage. low esr capacitors are preferred to keep the output voltage ripple low. in a buck converter circuit, output ripple voltage is determined by inductor value, switching frequency, output capacitor value and esr. the output ripple is determined by: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? out c l o c f 8 1 esr i v out where f = operating frequency, c out = output capacitance and i l = ripple current in the inductor. for a fixed output voltage, the output ripple is highest at maximum input voltage since i l increases with input voltage. using ceramic input and output capacitors care must be taken when ceramic capacitors are used at the input and the output. when a ceramic capacitor is used at the input and the power is supplied by a wall adapter through long wires, a load step at the output can induce ringing at the input, v in . in best condition, this ringing can couple to the output and be mistaken as loop instability. in wo rst condition, a sudden inrush of current through the long wires can potentially generate a voltage spike at v in , which may large enough to damage the part. when choosing the input and output ceramic capacitors, choose the one with x5r or x7r dielectric formulations. these dielectrics have the best temperature and voltage characteristics of all the ceramics for a given value and size. pc board layout checklist 1. the power traces, consisting of t he gnd trace, the lx trace and the v in trace should be kept short, direct and wide. 2. place c in near v cc pin as closely as possible to maintain input voltage steady and filter out the pulsing input current.
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 12/14 3. the resistive divider r 1 and r 2 must be connected to fb pin dire ctly as closely as possible. 4. fb is a sensitive node. please keep it away from switching node lx. a good approach is to route the feedback trace on another layer and to have a ground plane between the top layer and the layer on which the feedback trace is routed. this reduces emi radiation on to the dc-dc converter?s own voltage feedback trace. 5. keep the gnd plates of c in and c out as close as possible. then connect this to the ground plane (if one is used) with several vias. this reduces ground plane noise by preventing the switching currents from circulating through the ground plane. it also reduces ground bounce at the fp6116 gnd pin by giving it a low impedance ground connection. suggested layout
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 13/14 typical application fp6116 basic dc-dc regulator circuits for example: the v in power supply is 12v and the v out is designed for 5.0v / 3a solution. the output voltage formula is: v 0 . 5 v 8 . 0 k 2 0.5k 1 1 v r r 1 v ref 1 2 out ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
fp6116 this datasheet contains new product informat ion. feeling technology reserves the ri ghts to modify the product specification wi thout notice. no liability is assumed as a result of t he use of this product. no rights under any patent accompany the sales of the product. website: http://www.feeling-tech.com.tw rev. 0.61 14/14 package outline sop-8l unit: mm note: 1. package dimensions are in compliance with jedec outline: ms-012 aa. 2. dimension ?d? does not include molding flash, protrusions or gate burrs. 3. dimension ?e? does not include inter-lead flash, or protrusions. symbols min. (mm) max. (mm) a 1.346 1.752 a1 0.101 0.254 a2 1.498 d 4.800 4.978 e 3.810 3.987 h 5.791 6.197 l 0.406 1.270 0 8

▲Up To Search▲

Price & Availability of FP6116DR-G1

	To Download FP6116DR-G1 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .