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PS222L version : a.002 issue date : 2005/01/05 file name : sp-PS222L-a.002.doc total pages : 13 3-channel secondary monitoring ic with over-current protection and an additional 12v ocp channel ?W@^?I? 9 ? 7 ? 1 silicon touch technology inc . 9-7f-1, prosperity road i, science based industrial park, hsin-chu, taiwan 300, r.o.c. tel 886-3-5645656 fax 886-3-5645626
3-channel secondary monitoring ic version a.002 - 1 - PS222L PS222L 3-channel secondary monitoring ic with over-current protection and an additional 12v ocp channel general description PS222L is specially designed for switchi ng power supply system. four important functions of PS222L are the following: over-v oltage protection, over-current protection, under-voltage protection and power good signal generating. ovp/uvp (over-voltage/under-voltage protec tion) monitors 3.3v, 5v and 12v to protect our power supply. fpo/ goes to high when one of these supply voltages exceeds their normal oper ation voltage range. ocp (over current protection) monitors is33, is5, is12 input current sense. composed of ?i ref ? and ?protection current range resist or?, an adjustable over-current condition helps users design ocp easily. an additional ocp channel helps users monitor another 12v rail output current. power good signal generating can notify pers onal 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 ? fault protection output with open drain output stage ? open drain power good output signal for power good input ? built-in 300ms power good delay ? ac on 75ms delay for uv/oc protection ? 38ms pson/ control de-bounce ? 14us de-bounce for noise immunity ? wide power supply range (4.2v~16v) ? special care for ac power off
3-channel secondary monitoring ic version a.002 - 2 - PS222L block diagram h : 20ms l : 4.5us delay vcc / vsx vs12 vs5 vs33 isx is12 is5 is33 3.3 ov 3.3 uv 5 ov 5 uv 12 ov 12 uv 14us de-bounce band-gap reference power on reset clock generator 73us de-bounce h : 300ms l : 4.5us delay 38ms de-bounce constant current source i ref s q r fpo/ pson/ pgi pgo ri gnd por v ref clk 1m 1m 1 0 s q r 1.25v h : 75ms l : 4.5us delay h : 4ms l : 4.5us delay 159k 5k 16k v re f v re f vcci vcci 64.5k 6k 19.5k v re f v re f vcci vcci 51k 10k 29k v re f v re f vcci vcci i ref x 8 vcc oc vcci i ref x 8 12 oc vcci i ref x 8 5 oc vcci i ref x 8 3.3 oc vcci internal power vcci = 4v 1.13v vcci 0.63v vcci 1.25v vcci vcc vcci 30k 1.25v vcci step down to near 2.5v step down to near 2.5v step down to near 2.5v step down to near 2.5v 90k 4.5v 2k
3-channel secondary monitoring ic version a.002 - 3 - PS222L timing chart t d1 t b1 t d3 t d2 fpo/ pson/ pgi vcc isx vs12 is12 vs5 is5 vsx vs33 is33 pgo uvp/ovp/ocp protect pson/ turn on ac turn on pson/ turn off pson/ turn on ac turn off v pgi t d2 t d1 1.25v 0.63v 1.13v ovp ovp/uvp/ocp ovp
3-channel secondary monitoring ic version a.002 - 4 - PS222L pin descriptions pin no pin name descriptions 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 is12 12v(1) over curr ent protection input pin 6 ri current sense setting 7 isx 12v(2) over curr ent protection input pin 8 is5 5.0v over current protection input pin 9 is33 3.3v over current protection input pin 10 vs12 12v(1) over/under voltage protection input pin 11 vs33 3.3v over/under voltage protection input pin 12 vs5 5.0v over/under voltage protection input pin 13 vcc / vsx power supply 14 pgo power good output signal pin , open drain output stage absolute maximum ratings parameter rating unit storage temperature (t stg ) -40 to +125 c operating temperature (t opr ) -30 to +90 c supply voltage (v cc ) vcc/vsx -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/ -0.5 to vcc+0.5 v fpo/ -0.5 to +16.0 v output voltage range (v o ) pgo -0.5 to vcc+0.5 v output current for ri (i ri ) ri 12.5 to 62.5 ua pson/, pgo > 5000 v fpob, vs12 > 2000 v pgi, is12, vs5 > 3000 v esd susceptibility* (v esd ) others > 4000 v * human body model (hbm).
3-channel secondary monitoring ic version a.002 - 5 - PS222L electrical characteristics , vcc=12v, t a = full range. (unless otherwise specified) power supply section parameter conditions min typ max unit supply voltage 4.2 5.0 16.0 v supply current v pson/ = 5v 2 3 ma power on reset threshold voltage (v por ) 3.2 3.4 3.6 v power on reset hysteresis (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 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 10.3 10.8 11.0 v over-current section parameter conditions min typ max unit vsx, isx -5 -2 1 mv vs33, is33 -5 -2 3 mv vs5, is5 -5 -2 3 mv offset voltage (ocp comparator) vs12, is12 -5 -2 1 mv constant current generator voltage (v ri ) 1.20 1.25 1.30 v
3-channel secondary monitoring ic version a.002 - 6 - PS222L electrical characteristics (continued) pson/, analog input parameter conditions min typ max unit threshold voltage 1.16 1.25 1.33 v hysteresis (v hyst ) 20 50 80 mv pgi, analog input parameter conditions min typ max unit threshold voltage for start t d1 1.16 1.25 1.33 v threshold voltage for start t d2 0.60 0.63 0.75 v threshold voltage for mask oc,uv 1.05 1.13 1.21 v hysteresis (v hyst )* -20 -50 -80 mv * all of the comparator for pgi input in block diagram. pgo, open drain digital output parameter conditions min typ max unit leakage current (i lkg ) v pgo =5v 5 ua low level output voltage (v ol ) i sink =5ma 0.4 v fpo/, open drain digital output parameter conditions min typ max unit leakage current (i lkg ) v fpo/ =5v 5 ua low level output voltage (v ol ) i sink =10ma 0.3 v switching characteristics , vcc=12v, t a = full range. parameter conditions min typ max unit pgi to pgo delay time (t d1 ) 200 300 400 ms short circuit delay time (t d2 ) 49 75 100 ms pgo to fpo/ delay time (t d3 ) 2 4 6 ms over current delay time (t d4 ) 13 20 27 ms pson/ de-bounce time (t b1 ) 24 38 52 ms fpo/ noise de-glitch time (t b2 ) 9 14 19 us pgo noise de-glitch time (t b3 ) 47 73 100 us
3-channel secondary monitoring ic version a.002 - 7 - PS222L application typical 4 rails sps (dual 12v ocp) d v r oc12(2) r oc5 r oc33 r oc12(1) r i r pgi c pgi 1k +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 c pson d i r os 5.6k 14 13 12 11 10 8 1 2 3 4 5 6 7 pgi pson/ ri isx is12 fpo/ gnd pgo vs33 is33 is5 vs12 vs5 vsx PS222L 9 c by 0.1 uf 0.1 uf 0.1 uf 0.1 uf
3-channel secondary monitoring ic version a.002 - 8 - PS222L application (continued) typical 3 rails sps (single 12v ocp) r oc5 r oc33 r oc12 r i r pgi c pgi 1k +5v sb pgo pson +5v sb = or s.p.s. secondary side r s5 +5v output r s12 +12v output +12v coil r s33 +3.3v output +3.3v coil r pgo 4.7k c pson 14 13 12 11 10 8 1 2 3 4 5 6 7 pgi pson/ ri isx is12 fpo/ gnd pgo vs33 is33 is5 vs12 vs5 vsx PS222L 9 c by 0.1 uf 0.1 uf 0.1 uf
3-channel secondary monitoring ic version a.002 - 9 - PS222L 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 5. gnd path: (1) the gnd path width is wider as far as it could. (2) the better grounding ability has better performance at surge test. 6. PS222L uses single 12vocp protection function: as ?typical 3 rails sps? application ci rcuit, the pin7(isx) must be connected a resistor(resistance>10k ) to gnd or floating.
3-channel secondary monitoring ic version a.002 - 10 - PS222L package specification d 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 ( 14-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 19.400 0.200 0.764 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
3-channel secondary monitoring ic version a.002 - 11 - PS222L package specification (continued) dimension in mm symbol dimension in inch min. max. min. max. d e h a 1 a c l 0.0 0.2 0.4 inch 0 10 mm 5 ( 14-pin sop ) seating plane a 1.35 1.75 0.0532 0.0688 a 1 0.1 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 8.55 8.75 0.3367 0.3444 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 b e h x 45
3-channel secondary monitoring ic version a.002 - 12 - PS222L the products listed herein are designed for or dinary electronic applications, such as electrical appliances, audio-visual equi pment, communications devices and so on. hence, it is advisable that the devices should not be used 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 without notice, and advise cu stomers to obtain the latest version of relevant informati on to verify, before placing orders, that information being relied on is current and complete.

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