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PS224 version : a.004 issue date : 2005/08/19 file name : sp-PS224-a.004.doc total pages : 11 4-channel secondary monitoring ic free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 1 - PS224 PS224 4-channel secondary monitoring ic general description PS224 is specially designed for switchi ng power supply system. four important functions of PS224 are the followings: over-vol tage protection, over-current protection, under-voltage protection and power good signal generating. ovp/uvp (over-voltage/under-voltage prot ection) monitors 3.3v, 5v and dual 12v to protect our power supply and pc, fp o/ goes to high when one of these supply voltages exceeds their normal operation voltage range. ocp (over current protection) monitors is33, is5, is12a, is12b input current sense. an adjustable over-current condition composed of iref and ?protection current range resistor? helps users design ocp easily. an additional protection input pin provides the flexibility for design protection circuit. power good signal generating notifies personal computer when power supply is ready or power supply is going to shutdown, therefore it can provide a reliable power supply environment. features ? over/under-voltage protection and lock out ? over-current protection and lock out ? additional protection input ? fault protection output with open drain output stage ? open drain power good output si gnal for power good input ? built-in 300ms power good delay ? ac on 75ms delay for uv/oc protection ? 38ms pson/ control de-bounce ? wide power supply range (3.8v~16v) ? special care for ac power off free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 2 - PS224 block diagram v s33 51k 10k 29k v re f v re f 3.3 ov 3.3 uv v s5 64.5k 6k 19.5k v re f v re f 5 ov 5 uv v s12b 159k 5k 16k v re f v re f 12 ov 12 uv band-gap reference power on reset clock generator 38ms de-bounce constant current source i ref fpo/ pgi pgo ri gnd por v ref clk 73us de-bounce h : 300ms l : 4.5us delay 1m 1 0 s q r h : 75ms l : 4.5us delay 0.63v 1.25v vcci 1.25v s q r 1m h : 4ms l : 4.5us delay v s12 a 12 ov 12 uv 159k 5k 16k v re f v re f 1.25v pext internal power vcci = 4v pson/ vcc 30k 1.25v vcci 90k 4.5v 2k h : 20ms l : 4.5us delay is5 is12 a i ref x 8 12 oc vcci step down to near 2.5v is12b i ref x 8 12 oc vcci step down to near 2.5v i ref x 8 5 oc vcci step down to near 2.5v is33 i ref x 8 3.3 oc vcci step down to near 2.5v 1.25v 1ms delay vcc v cc 1ms delay 14us delay free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 3 - PS224 timing chart v pgi t d2 t d1 1.25v 0.63v 1.25v ovp ovp/uvp/ocp/pext ovp t d1 t b1 t d3 t d2 fpo/ pson/ pgi vcc pgo uvp/ovp/ocp pext protect pson/ turn on ac turn on pson/ turn off pson/ turn on ac turn off is12a vs12b is12b vs5 is5 vs12a vs33 is33 pext free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 4 - PS224 pin descriptions pin no pin name descri p tions 1 pgi power good input signal pin 2 gnd ground 3 fpo/ inverted fault protection output ,open drain output stage 4 pson/ remote on/off control input pin 5 is12a 12v(1) over curr ent protection input pin 6 ri current sense setting 7 is12b 12v(2) over curr ent protection input pin 8 vs12b 12v(2) over/under voltage protection input pin 9 pext external protection detect input pin 10 is5 5.0v over current protection input pin 11 is33 3.3v over current protection input pin 12 vs12a 12v(1) over/under voltage protection input pin 13 vs33 3.3v over/under voltage protection input pin 14 vs5 5.0v over/under voltage protection input pin 15 vcc power supply 16 pgo power good output signal pin , open drain output stage absolute maximum ratings paramete r ratin g unit s torage temperature (t stg ) -40 to +125 c o perating temperature (t opr ) -30 to +90 c s upply voltage (v cc ) vcc -0.5 to +16.0 v isx, vs12, is12 -0.5 to +16.0 v vs5, is5 -0.5 to +9.0 v vs33, is33 -0.5 to +7.0 v pgi -0.5 to +16.0 v input voltage range (v i ) pson/, pext -0.5 to vcc+0.5 v fpo/ -0.5 to +16.0 v o utput voltage range (v o ) pgo -0.5 to vcc+0.5 v o ut p ut current for ri ( i ri ) ri 12.5 to 62.5 u a pson/, pgo > 5000 v fpob, vs12 > 2000 v pgi, is12, vs5 > 3000 v esd susceptibility* (v esd ) others > 4000 v * human body model (hbm). free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 5 - PS224 electrical characteristics , vcc=12v, t a = full range. (unless otherwise specified) power supply section parameter conditions min typ max unit su pp l y volta g e 3.8 5.0 16.0 v su pp l y current v pson/ = 5v 4.5 5.0 m a power on reset threshold volta g e ( v por ) 3.2 3.4 3.6 v power on reset h y steresis ( v hyst ) -0.15 -0.3 -0.45 v over-voltage section parameter conditions min typ max unit vs33 3.8 3.9 4.0 v vs5 5.6 5.8 6.0 v over-voltage threshold vs12 a /b 13.5 14.0 14.2 v under-voltage section parameter conditions min typ max unit vs33 2.8 2.9 3.0 v vs5 4.2 4.4 4.6 v under-voltage threshold vs12 a /b 10.3 10.8 11.0 v over-current section parameter conditions min typ max unit vs33 / vs5 -5 0 3 mv offset voltage (ocp comparator) vs12 a /b -5 0 1 mv constant current generator volta g e ( v ri ) 1.20 1.25 1.30 v pgi, analog input parameter conditions min typ max unit threshold volta g e for start t d1 1.16 1.25 1.33 v threshold volta g e for start t d2 0.60 0.63 0.75 v threshold volta g e for mask oc,uv 1.16 1.25 1.33 v h y steresis ( v hyst ) * -20 -50 -80 mv * all of the comparator for pgi input in block diagram. free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 6 - PS224 electrical characteristics (continued) pgo, open drain digital output parameter conditions min typ max unit leaka g e current ( i lkg ) v pgo =5v 5 u a low level out p ut volta g e ( v ol ) i sink =10m a 0.3 v fpo/, open drain digital output parameter conditions min typ max unit leaka g e current ( i lkg ) v fpo/ =5v 5 u a low level out p ut volta g e ( v ol ) i sink =20m a 0.3 v pson/, analog input parameter conditions min typ max unit threshold volta g e 1.16 1.25 1.33 v h y steresis ( v hyst ) 20 50 80 mv external protection detect section parameter conditions min typ max unit threshold(v th ) 1.20 1.25 1.30 v h y steresis ( v hyst ) -20 -50 -80 mv switching characteristics , vcc=12v, t a = full range. parameter conditions min typ max unit pgi to pgo dela y time ( t d1 ) 200 300 400 ms short circuit dela y t ime ( t d2 ) 49 75 100 ms pgo to fpo/ dela y time ( t d3 ) 24 6 ms under volta g e dela y time ( t d4 ) 0.6 1 1.4 ms over current dela y t ime ( t d5 ) 13 20 27 ms over volta g e dela y time ( t d6 ) 9 14 19 us pext dela y time ( t d7 ) 0.6 1 1.4 ms pson/ de-bounce time ( t b1 ) 24 38 52 ms pgo noise de- g litch t ime ( t b2 ) 47 73 100 us free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 7 - PS224 application typical 4 rails sps notes: 1. zener diode or resist or or both of t hem can be used in component x. 2. the bypass capacitor c by suggests to be 0.1uf~ 10uf and layout nearby pin vcc. 3. the recommend sense values of r s12(1) , r s12(2) , r s5 and r s33 are 0.002 . 4. over-current protection design example: (1) a i ref 20 = , () = = = k i v r ri ri i 5 . 62 20 25 . 1 (2) r s5 =0.002 , ref oc v v i r i v = = + 8 002 . 0 5 5 5 (3) if +5v ocp trip point is 20a, () = = 250 20 8 20 002 . 0 5 oc r r oc12(2) r oc5 r oc33 r oc12(1) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 pgi pson/ ri is12b vs12b is12a fpo/ gnd pgo vs33 is33 is5 pext vs12a vs5 vcc PS224 r i r pgi c pgi 1k c by +5v sb pgo pson +5v sb = or s.p.s. secondary side r s5 +5v output r s12(2) +12v (2) output +12v (2) coil r s12(1) +12v (1) output +12v (1) coil r s33 +3.3v output +3.3v coil r pgo 4.7k pext free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 8 - PS224 package specification e 1 e b 1 a 1 e a s a 2 ? 0.0 0.5 1.0 inch 0 10 25 mm 15 5 20 ( 16-pin dip ) l seating plane b e b dimension in mm symbol dimension in inch a 5.330 (max) 0.210 (max) a 1 0.380 (min) 0.015 (min) a 2 3.300 0.130 0.130 0.005 b 1.520 (typ) 0.060 (typ) b 1 0.460 (typ) 0.018 (typ) d 19.180 0.200 0.755 0.008 e 7.620 (typ) 0.300 (typ) e 1 6.350 0.130 0.250 0.005 e 2.540 (typ) 0.100 (typ) e b 9.000 0.500 0.355 0.020 l 9.020 0.500 0.130 0.020 s 1.800 (typ) 0.074 (typ) ? 0 ~ 15 0 ~ 15 note d free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 9 - PS224 package specification dimension in mm symbol dimension in inch min. max. min. max. c l 0.0 0.2 0.4 inch 0 10 mm 5 ( 16-pin sop ) a 1.35 1.75 0.0532 0.0688 a 1 0.10 0.25 0.0040 0.0098 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.0075 0.0098 e 1.27bsc 0.050bsc d 9.80 10.00 0.3859 0.3937 h 5.80 6.20 0.2284 0.2440 e 3.80 4.00 0.1497 0.1574 l 0.40 1.27 0.016 0.050 h 0.25 0.50 0.0099 0.0196 0 8 0 8 note d e h a 1 a seating plane b e h x 45 free datasheet http://www.datasheetlist.com/
c???? silicon touch technology inc. 4-channel secondary monitoring ic version a.004 - 10 - PS224 the products listed herein are designed for or dinary electronic applications, such as electrical appliances, audio-visual equipm ent, communications devices and so on. hence, it is advisable that the devices should not be us ed in medical instruments, surgical implants, aerospace machi nery, nuclear power control systems, disaster/crime-prevention equipment and the like. misusing those products may directly or indirectly endanger human lif e, or cause injury and property loss. silicon touch technology, inc. will not take any responsibilities regarding the misusage of the products m entioned above. anyone w ho purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. silicon touch technology, inc. and its distributors and all their office rs and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such in tention and manipulation. silicon touch technology, inc. reserve the ri ght to make changes to their products or to discontinue any product or service withou t notice, and advise customers to obtain the latest version of relevant informati on to verify, before placing orders, that information being relied on is current and complete. free datasheet http://www.datasheetlist.com/

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