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?2005 fairchild semiconductor corporation www.fairchildsemi.com rev. 1.0.2 features ? green current mode pwm control ? low operating current: max 4ma ? burst mode operation ? internal high voltage start-up switch ? under voltage lockout (uvlo): 12v/8v ? latch protection & soft start function ? over voltage protection: 19v ? operating frequency up to 300khz ? max duty cycle: 95% typical applications ? off-line adapter applications ? auxiliary power supplies description the fan7601 is a green programmable frequency current mode pwm controller. it is specially designed for the off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load. the internal high voltage start-up switch and the burst mode reduce the power loss. the fan7601 includes some protections such as latch protection and over voltage protection. the latch protection can be used for over voltage protection and/or thermal protection and so on. and the soft start prevents the output voltage over shoot at start up. 8-sop 1 8-dip 1 10-ssop 1 internal block diagram * ( ) is 10-ssop pin number latch/ss delay circuit 1v enable + ? ? + ? + ? + ? + ? + ? fan7601 green current mode pwm controller
fan7601 2 pin assignments pin definitions *( ) is 10-ssop pin number pin number pin name pin function description 1 (1) vstr start-up 2 (3) cs/fb current sense and feedback 3 (4) latch/ss latch protection and soft start 4 (5) rt/ct oscillator timing 5 (6) gnd ground 6 (7) out gate drive output 7 (8) v cc ic power supply 8 (10) v ref voltage reference fan7601 1 2 6 5 8 7 yww 3 4 cs/fb rt/ct latch/ss vstr vref vcc out gnd 8-dip, 8-sop 10-ssop 7601 1 2 7 6 10 8 yww 4 5 cs/fb rt/ct latch/ss vstr vref vcc out gnd 3 nc 9 nc
fan7601 3 absolute maximum ratings (ta = 25 c, unless otherwise specified) characteristics symbol value unit supply voltage v cc 20 v input voltage cs/fb v cs/fb -0.3 to 20 v operating temperature t opr -25 to +125 c storage temperature t stg -55 to +150 c junction temperature tj 150 c output current i o 250 ma vstr input voltage vstr 500 v esd capability, hbm model (all pins except vcc and vstr) -2.0kv esd capability, machine model - 300 v thermal resistance, junction to air 8-dip r ja 100 c/w 8-sop 180 10-ssop 130
fan7601 4 electrical characteristics (t a = -25 c ~ 125 c, vcc = 14v, rt = 9.5k ? , ct = 2.2nf unless otherwise specified) note: 1. these parameters, although guaranteed, are not 100% tested in production. 2. it is recommended to connect 1m ? resistor between the latch/ss pin and gnd to prevent abnormal oper ation of the latch protection by noise coupling. characteristics symbol conditions min. typ. max. unit reference section reference output voltage v ref i o = 1ma 4.85 5.00 5.15 v line regulation ? v ref1 v cc = 10v ~ 18v - 10 20 mv load regulation ? v ref2 i o = 1ma ~ 10ma - 20 30 mv oscillator section initial accuracy f osc - 90 100 110 khz voltage stability st v v cc = 10v ~ 18v - 1.0 1.5 % amplitude v ocs v pin4 peak-to-peak -1.25- v pwm section cs/fb threshold voltage1 v cs/fb1 - 0.9 1.0 1.1 v maximum duty cycle d max ta = 25 c929598% minimum duty cycle d min ---0% burst mode section cs/fb threshold voltage2 (1) v cs/fb2 -0.770.971.17v cs/fb threshold voltage3 (1) v cs/fb3 - 0.7 0.9 1.1 v soft start section soft start current i ss v pin3 = gnd 9 12 15 a soft start limit voltage (2) v sl i ss = 1 a 1.2 1.5 1.8 v protection section latch voltage v latch - 2.25 2.5 2.75 v over voltage protection v ovp -181920v uvlo section start threshold voltage v th -111213v minimum operating voltage v tl -789v total current section operating supply current i op --34ma output section low output voltage v ol ta =25 c, i o = 100ma - 2 2.5 v high output voltage v oh ta =25 c, i o = -100ma 11.5 12 14 v rising time (1) t r ta =25 c, ci = 1nf - 45 150 ns falling time (1) t f ta =25 c, ci = 1nf - 35 150 ns start up section vstr start-up current i str v str = 30v, ta =25 c 0.5 1 1.5 ma
fan7601 5 typical performance characteristics -50 0 50 100 150 4.85 4.90 4.95 5.00 5.05 5.10 5.15 vref (v) junction temperature ( c) -50 0 50 100 150 2.0 2.2 2.4 2.6 2.8 3.0 supply current icc (ma) junction temperature ( c) -50 0 50 100 150 11.0 11.5 12.0 12.5 13.0 vcc start threshold vth (v) junction temperature ( c) -50 0 50 100 150 7.0 7.5 8.0 8.5 9.0 vcc stop threshold vtl (v) junction temperature ( c) -50 0 50 100 150 90 95 100 105 110 oscillator frequency fosc (khz) junction temperature ( c) -50 0 50 100 150 90 92 94 96 98 100 maximum duty cycle dmax (%) junction temperature ( c) figure 1. trimmed reference voltage figure 2. supply current figure 3. vcc start threshold voltage figure 4. vcc stop threshold voltage figure 5. oscill ator frequency figure 6. maximum duty cycle
fan7601 6 typical performance characteristics (continued) figure 8. oscillator low threshold voltage figure 9. output rising time figure 11. start-up current figure 7. oscillator high threshold voltage figure 12. over voltage protection level figure 10. output falling time -50 0 50 100 150 2.3 2.4 2.5 2.6 2.7 oscillator high threshold vrh (v) junction temperature ( c) -50 0 50 100 150 1.15 1.20 1.25 1.30 1.35 oscillator low threshold vrl (v) junction temperature ( c) -50 0 50 100 150 0 30 60 90 120 150 rising time tr (ns) junction temperature ( c) -50 0 50 100 150 0 30 60 90 120 150 falling time tf (ns) junction temperature ( c) -50 0 50 100 150 0.0 0.4 0.8 1.2 1.6 2.0 start up current istr (ma) junction temperature ( c) -50 0 50 100 150 18.0 18.4 18.8 19.2 19.6 20.0 over voltage protection vovp (v) junction temperature ( c)
fan7601 7 typical performance characteristics (continued) figure 14. soft start current figure 13. latch protection voltage figure 15. oscillator fr equency characteristic -50 0 50 100 150 2.2 2.3 2.4 2.5 2.6 2.7 2.8 latch protection vlatch (v) junction temperature ( c) -50 0 50 100 150 9 10 11 12 13 14 15 soft start current isoft (ua) junction temperature ( c) 0 1020304050 1 10 100 1000 ct= 680pf 820pf 1nf 2.2nf 3.3nf 4.7nf 8.2nf 10nf frequency (khz) rt (k ? )
fan7601 8 mechanical dimensions 8dip
fan7601 9 mechanical dimensions (unit: mm) (continued) package 8-sop 4.92 0.20 0.194 0.008 0.41 0.10 0.016 0.004 1.27 0.050 5.72 0.225 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 6.00 0.30 0.236 0.012 3.95 0.20 0.156 0.008 0.50 0.20 0.020 0.008 5.13 0.202 max #1 #4 #5 0~8 #8 0.56 0.022 () 1.80 0.071 max0.10 max0.004 max min + 0.10 -0.05 0.15 + 0.004 -0.002 0.006
fan7601 10 mechanical dimensions (unit: mm) (continued) package 10-ssop-225
fan7601 11 ordering information device package operating temp. fan7601n 8-dip -25 c ~ 125 c fan7601m 8-sop fan7601g 10-ssop
fan7601 4/11/05 0.0m 001 stock#dsxxxxxxxx ? 2005 fairchild semiconductor corporation life support policy fairchild?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain li fe, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others.
careers | sitema go datasheets, samples, buy technical information applications design center support company investors my f a home >> find products >> fan7601 green mode pwm control ic general description back to top features back to top applications contents ? general description ? features ? applications ? product status/pricing/packaging ? order samples ? application notes ? qualification support the fan7601 is a green programmable frequency current mode pwm controller. it is specially designed for the off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load. the internal high voltage start-up switch and the burst mode reduce the power loss. the fan7601 includes some protections such as latch protection and over voltage protecti on. the latch protection can be used for over voltage protection and/or thermal protection and so on. and the soft start prevents the output voltage over shoot at start up. z green current mode pwm control z low operating current: max 4ma z burst mode operation z internal high voltage start-up switch z under voltage lockout (uvlo): 12v/8v z latch protection & soft start function z over voltage protection: 19v z operating frequency up to 300khz z max duty cycle: 95% datasheet download this datasheet e - mail this datasheet this page print version related links request samples how to order products product change notices (pcns) support sales support quality and reliability design cente r pa g e 1 of 3 product folder - fairchild p/n fa n7601 - green mode pwm control ic 16-au g -2007 mhtml:file://c:\temp\FAN7601GX.mht
product status/pricing/packaging back to top application notes back to top back to top z off-line adapter applications z auxiliary power supplies product product status pb-free status pricing* package type leads packing method fan7601g full production $0.72 ssop 10 rail FAN7601GX full production $0.72 ssop 10 tape reel fan7601m full production $0.67 soic 8 rail fan7601mx full production $0.67 soic 8 tape reel fan7601n full production $0.67 dip 8 rail * fairchild 1,000 piece budgetary pricing ** a sample button will appear if the part is available through fa irchild's on-line samples program. if there is no sample butt on, please contact a fairchild distributo r to obtain samples indicates product with pb -free second-level interconne ct. for more information click here. a n - 4129: green current mode pwm controller fan7601 (357 k) jul 27, 2007 a n - 6014: an - 6014 green current mode pwm controller fan7602 (390 k) jul 27, 2007 pa g e 2 of 3 product folder - fairchild p/n fa n7601 - green mode pwm control ic 16-au g -2007 mhtml:file://c:\temp\FAN7601GX.mht
qualification support click on a product for detailed qualification data back to top product fan7601g FAN7601GX fan7601m fan7601mx fan7601n ? 2007 fairchild semiconductor products | design center | support | company news | investors | my fairchild | contact us | site index | privacy policy | site terms & conditions | standard terms & conditions o pa g e 3 of 3 product folder - fairchild p/n fa n7601 - green mode pwm control ic 16-au g -2007 mhtml:file://c:\temp\FAN7601GX.mht

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