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PS231S version : a.002 issue date : 2009/06/30 file name : sp-PS231S-a.002.doc total pages : 11 5-channel secondary monitoring ic ?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
PS231S 5-channel secondary monitoring ic version a.002 page 1 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. PS231S 5-channel secondary monitoring ic general description PS231S is specially designed for switchi ng power supply system. four important functions of PS231S are the followings: 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 triple 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, is12c 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 signal 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
PS231S 5-channel secondary monitoring ic version a.002 page 2 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. block diagram vs33 38.5k 23.5k 28k v re f v re f 3.3 ov 3.3 uv vs5 58k 13.5k 18.5k v re f v re f 5 ov 5 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 1.13v s q r 1m h : 4ms l : 4.5us delay 2.6v pext internal power vcci = 4v pson/ vcc 30k 1.25v vcci 90k 4.5v 2k h : 20ms l : 4.5us delay is5 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 vcc 73us delay ov uv 155k 9k 16k v re f v re f oc vcci i ref x 8 step down to near 2.5v vs is vs12b vs12a vs12c is12b is12a is12c vs 12 uv 12 ov 12 oc
PS231S 5-channel secondary monitoring ic version a.002 page 3 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. timing chart v pgi t d2 t d1 1.25v 0.63v 1.13v 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 is12b vs12c is12c vs5 is5 vs12b vs33 is33 pext is12a vs12a
PS231S 5-channel secondary monitoring ic version a.002 page 4 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. 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 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 vs12c 12v(3) over/under voltage protection input pin 10 is12c 12v(3) over curr ent protection input pin 11 pext external protection detect input pin 12 is5 5.0v over current protection input pin 13 is33 3.3v over current protection input pin 14 vs12a 12v(1) over/under voltage protection input pin 15 vs33 3.3v over/under voltage protection input pin 16 vs5 5.0v over/under voltage protection input pin 17 vcc power supply 18 pgo power good output signal pin , open drain output stage absolute maximum ratings parameter rating 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 vs12(a,b,c), is12(a,b,c) -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 utput current for ri (i ri ) ri 12.5 to 62.5 ua
PS231S 5-channel secondary monitoring ic version a.002 page 5 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. electrical characteristics , vcc=12v, t a = 25 . (unless otherwise specified) power supply section parameter conditions min typ max unit supply voltage 3.8 5.0 16.0 v supply current v pson/ = 5v 4.5 5.0 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 3.7 3.9 4.1 v vs5 5.7 6.1 6.5 v over-voltage threshold vs12a/b/c 13.1 13.8 14.5 v under-voltage section parameter conditions min typ max unit vs33 2.0 2.2 2.4 v vs5 3.3 3.5 3.7 v under-voltage threshold vs12a/b/c 8.5 9.0 9.5 v 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.
PS231S 5-channel secondary monitoring ic version a.002 page 6 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. electrical characteristics (continued) 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 =10ma 0.3 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 =20ma 0.4 v 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 external protection detect section parameter conditions min typ max unit threshold(v th ) 2.5 2.6 2.7 v hysteresis (v hyst ) 20 50 80 mv switching characteristics , vcc=12v, t a = 25 . parameter conditions min typ max unit pgi to pgo delay time (t d1 ) 200 300 480 ms short circuit delay time (t d2 ) 49 75 114 ms pgo to fpo/ delay time (t d3 ) 2 4 6 ms under voltage delay time (t d4 ) 0.6 1 1.4 ms over current delay time (t d5 ) 13 20 27 ms over voltage delay time (t d6 ) 47 73 110 us pext delay time (t d7 ) 24 38 52 ms pson/ de-bounce time (t b1 ) 24 38 52 ms pgo noise de-glitch time (t b2 ) 47 73 110 us
PS231S 5-channel secondary monitoring ic version a.002 page 7 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. application typical 5 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) 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 pgi pson/ ri is12b vs12b is12a fpo/ gnd pgo vs33 is33 is5 pext vs12a vs5 vcc PS231S 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 10 9 vs12c is12c r s12(3) +12v (3) output +12v (3) coil r oc12(3)
PS231S 5-channel secondary monitoring ic version a.002 page 8 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. package specification e 1 e b 1 a 1 e a a 2 ? 0.0 0.5 1.0 inch 0 10 25 mm 15 5 20 ( 18-pin dip ) l seating plane b e b d dimension in mm symbol dimension in inch note a 1 0.381 0.015 a 2 3.175 3.302 3.429 0.125 0.130 0.135 b 1 0.457 0.018 d 22.352 22.860 23.368 0.880 0.900 0.920 e 1 6.223 6.350 6.477 0.245 0.250 0.255 e 2.540 0.100 l 2.921 3.302 3.810 0.115 0.130 0.150 a 5.334 0.210 e 7.620 0.300 e b 8.509 9.017 9.525 0.335 0.355 0.375 b 1.524 0.060 ? 0 7 15 0 7 15 min normal max min normal max
PS231S 5-channel secondary monitoring ic version a.002 page 9 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. d e h a 1 a l 0.0 0.2 0.4 inch 0 10 mm 5 ( 18-pin sop ) b e 0.020 x 45 dimension in mm symbol dimension in inch note a 1 0.102 0.305 0.004 0.012 d 11.354 11.760 0.447 0.463 e 1.270 0.050 l 0.406 1.270 0.016 0.050 a 2.362 2.642 0.093 0.104 e 7.391 7.595 0.291 0.299 h 10.008 10.643 0.394 0.419 b 0.406 0.016 ? 0 8 0 8 min normal max min normal max package specification
PS231S 5-channel secondary monitoring ic version a.002 page 10 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. 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 used in medical instruments, surgical implants, aerospace machi nery, nuclear power control systems, disaster/crime-prevention equipment and t he 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 offi cers 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.

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