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product specification pc power supply supervisors sg6520 ? system general corp. - 1 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 features ? two 12v sense input pins: vs12 and vs12b ? over voltage protection (ovp) for 3.3v, 5v, and two 12v ? over current protection (ocp) for 3.3v, 5v, and two 12v ? under voltage protection (uvp) for 3.3v, 5v, and two 12v ? open drain output for pgo and fpo pins ? 300ms power good delay ? 300ms turn on delay for 3.3v, 5v and two 12v ? 2.8ms pson control to fpo turn-off delay ? 48ms pson control delay ? no lockup during the fast ac power on/off ? wide supply voltage range from 4.2v to 15v ? programmable over temperature protection(otp) description sg6520 is designed to provide the voltage, and current supervisor function, remote on/off (pson) function, power good (pgo) indicator function, and fault protection (fpo) function for switching power systems. for supervisor function, it provides the over voltage protection (ovp) for 3.3v, 5v and two 12v; over current protection (ocp) for 3.3v, 5v and two 12v; under voltage protection (uvp) for 3.3v, 5v and two 12v. when 3.3v, 5v or 12v voltage is decreasing to 2.3v, 3.5v and 9v respectively, the under voltage protection (uvp) function will be enabled. fpo will be set to high to turn off the pwm controller ic. the voltage difference across external current shunt is used for ocp functions. an external resistor can be used to adjust protection threshold. the power supply is turned on after 48ms delay time when pson signal is set from high to low. to turn off power supply, pson signal is set from low to high with the delay time 48ms. the pgi circuitry provides a power-down warning signal for pgo. when pgi input is lower than the internal 1.25v reference voltage, pgo signal is pulled low. typical application
product specification pc power supply supervisors sg6520 ? system general corp. - 2 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 marking information pin configuration ordering information part number pb-free package type sg6520dz 16 pin dip plastic sg6520sz (preliminary) 16 pin sop plastic pin descriptions pin no. pin name type description 1 pgi analog input power good input. for atx smps, it detects ac line voltage through the main transformer. 2 gnd supply ground. 3 fpo logic output fault protection output. output signal to control the primary pwm ic through an opto-coupler. when fpo is low, the pwm ic is enabled. 4 pson logic input remote on/off logic input from cpu or main-board. the power supply will be turned on/off after 48ms delay. 5 is12 analog input 12v over current protection sense input. for typical application, this pin is connected to the positive end of a current shunt through one resistor. when the voltage on is12 is higher than that of vs12 by 5mv, ocp will be enabled. 6 ri analog input reference setting. one external resistor ri connected between ri and gnd pin will determine a reference current, iref = 1.25/ri, for ocp programming. 7 is12b analog input 12v over current protection sense input. for typical application, this pin is connected to the positive end of a current shunt through one resistor. when the voltage on is12 is higher than that of vs12 by 5mv, ocp will be enabled. 8 vs12b analog input second 12v over/under-voltage control sense input. 9 otp analog input for over-temperature protection. 10 is5 analog input 5v over current protection sense input. 11 is33 analog input 3.3v over current protection sense input. 12 vs12 analog input 12v over/under-voltage control sense input. 13 vs33 analog input 3.3v over/under-voltage control sense input. 14 vs5 analog input 5v over/under-voltage control sense input. 15 vdd supply supply voltage. 4.2v ~ 15v. for atx smps, it is connected to 5v-standby and 12v through diodes respectively. 16 pgo logic output power good logic output, 0 or 1(open-drain). power good=1 means that the power supply i s good for operation. the power good delay is 300ms. sg6520 tp xxxxxxxxywwv t : d = dip, s = sop p: z = lead free null=regular package xxxxxxxx : wafer lot y : year; ww : week v : assembly location
product specification pc power supply supervisors sg6520 ? system general corp. - 3 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 block diagram
product specification pc power supply supervisors sg6520 ? system general corp. - 4 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 function table pgi pson uv protection 12v & oc protection ov protection fpo pgo pgi<1.25v l no no l l pgi<1.25v l no yes h l pgi<1.25v l yes no l l pgi<1.25v l yes yes h l pgi>1.25v l no no l h pgi>1.25v l no yes h l pgi>1.25v l yes no h l pgi>1.25v l yes yes h l x h x x h l x = don?t care fpo = l means: fault is not latched fpo = h means: fault is latched pgo = l means: fault pgo = h means: no fault
product specification pc power supply supervisors sg6520 ? system general corp. - 5 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 timing diagram pson on/off and 3.3v, 5v ovp function
product specification pc power supply supervisors sg6520 ? system general corp. - 6 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 12v ovp/uvp and ocp function
product specification pc power supply supervisors sg6520 ? system general corp. - 7 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 absolute maximum ratings symbol parameter value unit v dd dc supply voltage 16 v input voltage pson, vs33, vs5, pgi, is33, is5, otp -0.3 to 7 v v i input voltage vs12, vs12b, is12,is12b -0.3 to 15 v v out output voltage fpo, pgo 8 v t j operating junction temperature -40 to 125 t stg storage temperature range -55 to 150 t l lead temperature (wave soldering or ir, 10 seconds) 260 esd capability, hbm model 4.5 kv esd capability, machine model 200 v *all voltage values, except differential voltages, are given with respect to gnd pin. * stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. recommended operating conditions symbol parameter test conditions value unit v dd dc supply voltage 4.2 to 15 v t oper operating ambient temperature range -25 to +85 * for proper operation electrical characteristics (v dd =12v, t a =25 , unless noted) vdd section symbol parameter test conditions min. typ. max. unit i dd1 supply current pson = low 1.7 2.6 ma i dd2 supply current pson = high 1.0 1.5 ma t r supply voltage rising time 1 ms v st vdd start threshold voltage 4.2 v over voltage and over current protection symbol parameter test conditions min. typ. max. unit over voltage protection vs33 3.7 3.9 4.1 over voltage protection vs5 5.7 6.1 6.5 v ovp over voltage protection vs12, vs12b 13.2 13.8 14.4 v i ref ratio of current sense sink current to current sense setting pin (ri) source current ri = 30 ?, 0.1% resistor 7.6 8 8.4 v offset ocp comparator input offset voltage -5 5 mv i lkg leakage current (fpo) v(fpo) = 5v 5 ua v ol low level output voltage (fpo) isink 20ma 0.4 v t ovp ovp delay time 33 75 110 us t ocp ocp delay time 12.5 20 27.5 ms v ri ri pin voltage 1.237 1.25 1.262 v i ri output current ri 12.5 62.5 ua t st-ocp start-up ocp / uvp protection time from fpo low to fpo high pgi < 1.25v ,fpo=low 200 300 450 ms
product specification pc power supply supervisors sg6520 ? system general corp. - 8 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 under voltage protection and pgi, pgo symbol parameter test conditions min. typ. max. unit v pgi input threshold voltage pgi 1.225 1.25 1.275 v under voltage protection vs33 2.1 2.3 2.5 under voltage protection vs5 3.3 3.5 3.7 v uvp under voltage protection vs12, vs12b 8.5 9.0 9.5 v t ond under voltage turn-on delay time pgi > 1.25v 49 75 114 ms t uvp uvp delay time pgi > 1.25v 175 275 375 us i lkg-pgo leakage current (pgo) pgo = 5v 5 ua v ol-pgo low level output voltage (pgo) vdd = 12v isink 10ma 0.4 v t pg timing pg delay pgi to pgo 200 300 450 ms t nd noise deglitch time pgi to pgo 90 150 210 us pson control symbol parameter test conditions min. typ. max. unit i pson input pull-up current pson = 0v 120 ua v ih high-level input voltage 2 v v il low-level input voltage 0.8 v t pson timing pson to on/off on (pson low to fpo low) off (pson high to pgo low) 34 34 48 48 67 67 ms t psoff timing pgo low to fpo high 1.6 2.8 4.5 ms over temperature section symbol parameter test conditions min. typ. max. unit v th over temperature threshold 2.4 2.5 2.6 v v hyst hysteresis 0.18 0.23 v
product specification pc power supply supervisors sg6520 ? system general corp. - 9 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 typical characteristics s upply c urrent (i dd1 ) vs t e mpe rature 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) i dd1 (ma ) r a tio o f c urre nt s e ns e s ink c urre nt to r i p in source current (i ref ) vs t e mpe ra ture 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) i ref oc p c omparator input offset voltage (v offset ) vs temperature -3 -2 -1 0 1 2 3 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) v offset (mv ) oc p delay time (t ocp ) vs t e mpe ra ture 12 14 16 18 20 22 24 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) t ocp (ms ) ri pin voltage (v ri ) vs t emperature 1.20 1.22 1.24 1.26 1.28 1.30 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) v ri (v ) input threshold voltage (v pg i ) vs t e mpe ra ture 1.20 1.22 1.24 1.26 1.28 1.30 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature ( ) v pg i (v )
product specification pc power supply supervisors sg6520 ? system general corp. - 10 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 application note over current protection (ocp) the sg6520 provides over current protection for the 3.3v, 5v and two 12v rails. whenever an ocp condition occurs at any of the voltage rails, pgo will be low and fpo will be open. the internal ocp comparators have a very small offset voltage (5mv). the sink currents of is33, is5, is12 and is12b are 8 times the current at the ri pin. the current at the ri pin is v ri /ri. here is an example demonstrating how to set the over current protection. if i 1 *r1>(i ri *8)*r2, than ocp active. how to select r2 resistor: if r1 =5m , ri=30k, ocp protection level is 35a, than r2 = (i 1 *r1)/(i ri *8) = (35a*5m )/{(1.25v/30k)*8} = 525
product specification pc power supply supervisors sg6520 ? system general corp. - 11 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 package information 16 pins - dip(d) e b e a a2 e a1 l b1 8 1 d 16 9 e1 dimensions: millimete r inch symbol min. t yp .max.min.t yp .max. a 5.334 0.210 a1 0.381 0.015 a2 3.175 3.302 3.429 0.125 0.130 0.135 b 1.524 0.060 b1 0.457 0.018 d 18.669 19.177 19.685 0.735 0.755 0.775 e 7.620 0.300 e1 6.121 6.299 6.477 0.241 0.248 0.255 e 2.540 0.100 l 2.921 3.302 3.810 0.115 0.130 0.150 e b 8.509 9.017 9.525 0.335 0.355 0.375 0 7 15 0 7 15
product specification pc power supply supervisors sg6520 ? system general corp. - 12 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007 16 pins - sop(s) detail a detail a y 18 16 9 b e e h f c d a2 a1 a l dimension: millimete r inch symbol min. t yp .max.min.t yp .max. a 1.346 1.753 0.053 0.069 a1 0.101 0.254 0.004 0.010 a2 1.244 1.499 0.049 0.059 b 0.406 0.016 c 0.203 0.008 d 9.804 10.008 0.386 0.394 e 3.810 3.988 0.150 0.157 e 1.270 0.050 h 5.791 6.198 0.228 0.244 l 0.406 1.270 0.016 0.050 f 0.381x45 0.015x45 y 0.101 0.004 0 8 0 8
product specification pc power supply supervisors sg6520 ? system general corp. - 13 - www.sg.com.tw ? www.fairchildsemi.com version 1.0.1 (iao33.0041.b0) september 28, 2007

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