PS224A Version Issue Date File Name Total Pages : A.001 : 2006/12/26 : SP-PS224A-A.001.doc : 10 4-Channel Secondary Monitoring IC 新竹市科學園區展業一路 9 號 7 樓之 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 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A PS224A 4-Channel Secondary Monitoring IC General Description PS224A is specially designed for switching power supply system. Four important functions of PS224A are the followings: over-voltage protection, over-current protection, under-voltage protection and power good signal generating. OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors 3.3V, 5V and dual 12V to protect our power supply and PC, FPO/ 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 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 Version：A.001 4-Channel Secondary Monitoring IC -1- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Block Diagram VS12A 159KΩ FPO/ delay 12 UV S Q 5KΩ Vref 14uS R 1MΩ 12 OV 16KΩ Vref delay 38mS De-bounce H : 4mS L : 4.5uS VS12B 159KΩ 12 UV 5KΩ Vref 16KΩ Vref VCC 30KΩ 12 OV VCCI 2KΩ PSON/ 1.25V 4.5V 90KΩ VS5 64.5KΩ 5 UV 6KΩ Vref delay 1 0 5 OV H : 75mS L : 4.5uS 19.5KΩ Vref 1.25V PGI 0.63V R Q S VS33 51KΩ 1.25V 3.3 UV 10KΩ Vref VCCI 3.3 OV 29KΩ Vref 1MΩ PGO delay VCCI IS12A Step Down to near 2.5V 73uS De-bounce 12 OC Iref X 8 H : 300mS L : 4.5uS delay delay 3mS 3mS Pext VCCI IS12B 1.25V Step Down to near 2.5V 12 OC delay Power On Reset Iref X 8 Step Down to near 2.5V Constant Current Source Iref 5 OC Internal Power Iref X 8 VCCI = 4V VCC VCCI IS33 Step Down to near 2.5V RI H : 20mS L : 4.5uS VCCI IS5 POR 3.3 OC Band-Gap Reference Vref 1.25V Clock Generator CLK VCC GND Iref X 8 Version：A.001 4-Channel Secondary Monitoring IC -2- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Timing Chart Vcc PSON/ FPO/ PGI VS12A VS12B VS5 VS33 Pext IS12A IS12B IS5 IS33 PGO Td1 Tb1 Td3 Td2 AC turn on VPGI UVP/OVP/OCP Pext protect PSON/ turn on PSON/ turn off PSON/ turn on AC turn off 1.25V 1.25V 0.63V Td1 Td2 OVP OVP/UVP/OCP/Pext OVP Version：A.001 4-Channel Secondary Monitoring IC -3- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Pin Descriptions Pin No 1 PIN NAME PGI Descriptions 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 current protection input pin 6 RI Current sense setting 7 IS12B 12V(2) over current 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 Parameter Storage Temperature Rating Unit (Tstg) -40 to +125 °C Operating Temperature (Topr) -30 to +90 °C VCC -0.5 to +16.0 V VS12A, VS12B, IS12A,IS12B -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 PSON/, Pext -0.5 to Vcc+0.5 V FPO/ -0.5 to Vcc+0.5 V PGO -0.5 to Vcc+0.5 V RI 12.5 to 62.5 uA PSON/, PGO > 5000 V FPOB, VS12A, VS12B > 2000 V PGI, IS12A,IS12B, VS5 > 3000 V Others > 4000 V Supply Voltage Input Voltage Range (VCC) (VI) Output Voltage Range (VO) Output Current for RI (IRI) ESD Susceptibility* (VESD) * Human Body Model (HBM). Version：A.001 4-Channel Secondary Monitoring IC -4- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Electrical Characteristics, Vcc=12V, Ta = 25°C. (unless otherwise specified) Power Supply Section Parameter Conditions Supply Voltage MIN 3.8 Supply Current Power On Reset Hysteresis (VHYST) MAX Unit 5.0 16.0 V 4.5 5.0 mA 3.2 3.4 3.6 V -0.15 -0.3 -0.45 V VPSON/ = 5V Power On Reset Threshold Voltage (VPOR) TYP 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 VS12A/B 13.5 14.0 14.2 V Over-Voltage Threshold 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 VS12A/B 10.3 10.8 11.0 V Under-Voltage Threshold Over-Current Section Parameter Offset Voltage Conditions MIN TYP VS33, VS5 -5 0 3 mV VS12A/B -5 0 1 mV 1.20 1.25 1.30 MIN TYP MAX Constant Current Generator Voltage (VRI) MAX Unit V PGI, Analog Input Parameter Conditions Unit Threshold Voltage for start Td1 1.16 1.25 1.33 V Threshold Voltage for start Td2 0.60 0.63 0.75 V Threshold Voltage for mask OC,UV 1.16 1.25 1.33 V +/-50 +/-80 mV +/-20 Hysteresis (VHYST)* * All of the comparator for PGI input in block diagram. Version：A.001 4-Channel Secondary Monitoring IC -5- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Electrical Characteristics (Continued) PGO, Open Drain Digital Output Parameter Conditions Leakage Current (ILKG) VPGO=5V Low Level Output Voltage (VOL) ISINK=10mA MIN TYP MAX Unit 5 uA 0.3 V FPO/, Open Drain Digital Output Parameter Conditions Leakage Current (ILKG) VFPO/=5V Low Level Output Voltage (VOL) ISINK=20mA MIN TYP MAX Unit 5 uA 0.3 V PSON/, Analog Input Parameter Conditions MIN TYP MAX Threshold Voltage 1.16 1.25 1.33 Hysteresis (VHYST) 20 50 80 Unit V mV External Protection Detect Section Parameter Conditions Threshold(VTH) MIN TYP MAX Unit 1.20 1.25 1.30 V -20 Hysteresis (VHYST) -50 -80 mV Switching Characteristics, Vcc=12V, Ta = 25°C. Parameter Conditions MIN TYP MAX Unit PGI to PGO Delay Time (Td1) 200 300 400 mS Short Circuit Delay Time (Td2) 49 75 100 mS PGO to FPO/ Delay Time (Td3) 2 4 6 mS Under Voltage Delay Time (Td4) 2.6 3 3.6 mS Over Current Delay Time (Td5) 13 20 27 mS Over Voltage Delay Time (Td6) 9 14 19 uS Pext Delay Time (Td7) 2.6 3 3.6 mS PSON/ De-bounce Time (Tb1) 24 38 52 mS PGO Noise De-glitch Time (Tb2) 47 73 100 uS Version：A.001 4-Channel Secondary Monitoring IC -6- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Application Typical 4 rails SPS S.P.S. Secondary Side RS5 +5V Output RS33 +3.3V Coil +3.3V Output R S12A +12VA Coil +12VA Output R S12B +12VBCoil +12VB Output VDET ROC5 ROC33 R OC12A R OC12B RPGO 4.7K R PGI-1 CPGI-1 1K 1 PGI PGO 16 2 GND Vcc 15 +5V SB 3 FPO/ PSON 4 PSON/ VS5 14 IS5 10 PEXT 9 Pext C12A-1 0.1 uF C PGO 0.1 uF Cby RI RPGI-2 CPGI-2 C PS ON 0.1 uF C12B-1 0.1 uF IS12B 8 VS12B 0.1 uF IS33 11 C 5-1 VS12A 12 0.1 uF IS12A VS33 13 6 RI 7 +5V SB C 33-1 5 PGO C 12A-2 0.1 uF C 12B-2 0.1 uF Notes: 1. Zener diode or resistor or both of them can be used in component X. 2. The bypass capacitor Cby suggests to be 0.1uF~ 10uF and layout nearby pin VCC. 3. The recommend sense values of RS12(1), RS12(2), RS5 and RS33 are ≥ 0.002Ω. 4. Over-Current Protection design example: V 1.25 (1) I ref = 20 μA , RI = RI = = 62.5 K (Ω ) I RI 20μ (2) RS5=0.002 Ω , ΔV5V = 0.002 × I +5V = ROC 5 × 8 × I ref (3) If +5V OCP trip point is 20A, ROC 5 = 0.002 × 20 = 250(Ω ) 8 × 20 μ Version：A.001 4-Channel Secondary Monitoring IC -7- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A Package Specification ( 16-pin DIP ) E1 E eB θ° D A2 A Seating Plane A1 b1 e b 0 S 5 10 0.0 Symbol Dimension in mm Min Normal A A1 Max Normal 0.130 1.5 1.6 0.055 0.059 0.063 b1 0.38 0.48 0.58 0.015 0.019 0.023 D 18.67 19.20 19.69 0.735 0.756 0.775 E 7.37 7.62 7.87 0.290 0.300 0.310 E1 6.05 6.30 6.55 0.238 0.248 0.258 e 2.19 2.54 2.89 0.086 0.100 0.114 EB 7.32 8.40 9.53 0.288 0.331 0.375 L 2.54 2.92 3.81 0.100 0.115 0.150 1.80 0 1.0 inch 0.210 1.4 θ° mm Max b S 25 0.015 3.30 A2 20 NOTE Dimension in inch 5.33 0.38 15 0.5 Min L 7 0.074 15 0 7 15 Version：A.001 4-Channel Secondary Monitoring IC -8- 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. PS224A The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipment, communications devices and so on. Hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. Misusing those products may directly or indirectly endanger human life, or cause injury and property loss. Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage of the products mentioned above. Anyone who 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 officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation. Silicon Touch Technology, Inc. reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. Version：A.001 4-Channel Secondary Monitoring IC -9-