PS222S Version Issue Date File Name Total Pages : A.001 : 2003/09/04 : SP-PS222S-A.001.doc : 13 3-Channel Secondary Monitoring IC With Over-Current Protection And an Additional 12V OCP Channel 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. Fax：886-3-5645626 Tel：886-3-5645656 PS222S PS222S 3-Channel Secondary Monitoring IC With Over-Current Protection And an Additional 12V OCP Channel General Description PS222S is specially designed for switching power supply system. Four important functions of PS222S are the following: 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 12V to protect our power supply. FPO/ goes to high when one of these supply voltages exceeds their normal operation voltage range. OCP (Over Current Protection) monitors IS33, IS5, IS12 input current sense. Composed of “Iref“ and “protection current range resistor”, 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 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 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 73uS 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.001 -1- PS222S Block Diagram Vcc / VSx FPO/ 73uS De-bounce VS12 155KΩ Ω VCCI 9KΩ Ω S Q R 1MΩ Ω 12 UV Vref delay VCCI 12 OV 16KΩ Ω H : 4mS L : 4.5uS Vref VCC 30KΩ Ω 2KΩ Ω VCCI PSON/ 38mS De-bounce VS5 1.25V 58KΩ Ω 90KΩ Ω 4.5V VCCI 5 UV 13.5KΩ Ω Vref VCCI 5 OV VCCI delay 18.5KΩ Ω Vref 1 0 H : 75mS L : 4.5uS 1.13V VCCI PGI VS33 0.63V R 38.5KΩ Ω VCCI VCCI Q S 3.3 UV 1.25V 23.5KΩ Ω Vref VCCI 3.3 OV 28KΩ Ω VCCI Vref 1MΩ Ω PGO VCCI ISX delay Vcc OC Step Down to near 2.5V 73uS De-bounce H : 300mS L : 4.5uS Iref X 8 VCCI IS12 12 OC Step Down to near 2.5V delay Iref X 8 Power On Reset VCCI IS5 5 OC Step Down to near 2.5V POR RI H : 20mS L : 4.5uS Internal Power Iref X 8 Constant Current Source Iref VCCI = 4V VCCI IS33 Step Down to near 2.5V 3.3 OC Band-Gap Reference Vref 1.25V Clock Generator CLK GND Iref X 8 3-Channel Secondary Monitoring IC Version：A.001 -2- PS222S Timing Chart Vcc PSON/ FPO/ PGI VSx VS12 VS5 VS33 ISx IS12 IS5 IS33 PGO Td1 Tb1 Td3 Td2 AC turn on VPGI UVP/OVP/OCP protect PSON/ turn on PSON/ turn off PSON/ turn on AC turn off 1.25V 1.13V 0.63V Td1 Td2 OVP 3-Channel Secondary Monitoring IC OVP/UVP/OCP OVP Version：A.001 -3- PS222S 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 current protection input pin 6 RI Current sense setting 7 ISx 12V(2) over current 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 Storage Temperature Rating Unit (Tstg) -40 to +125 °C Operating Temperature (Topr) -30 to +90 °C 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 PSON/ -0.5 to Vcc+0.5 V FPO/ -0.5 to +16.0 V PGO -0.5 to Vcc+0.5 V 12.5 to 62.5 uA PSON/, PGO > 5000 V FPOB, VS12 > 2000 V PGI, IS12, 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) RI * Human Body Model (HBM). 3-Channel Secondary Monitoring IC Version：A.001 -4- PS222S Electrical Characteristics, Vcc=12V, Ta = Full range. (unless otherwise specified) Power Supply Section Parameter Conditions Supply Voltage MIN 4.2 Supply Current TYP Power On Reset Hysteresis (VHYST) Unit 5.0 16.0 2 3 3.2 3.4 3.6 V -0.15 -0.3 -0.45 V VPSON/ = 5V Power On Reset Threshold Voltage (VPOR) MAX V mA 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 VS12 13.1 13.8 14.5 V Over-Voltage Threshold Under-Voltage Section Parameter Conditions Under-Voltage Threshold MIN TYP MAX Unit VS33 2.0 2.2 2.4 V VS5 3.3 3.5 3.7 V VS12 8.5 9.0 9.5 V Over-Current Section Parameter Offset Voltage (OCP Comparator) Conditions MIN TYP MAX Unit VSx, ISx -5 -2 1 mV VS33, IS33 -5 -2 1 mV VS5, IS5 -5 -2 1 mV VS12, IS12 -5 -2 1 mV 1.20 1.25 1.30 Constant Current Generator Voltage (VRI) 3-Channel Secondary Monitoring IC Version：A.001 V -5- PS222S Electrical Characteristics (Continued) PSON/, Analog Input Parameter Conditions MIN TYP MAX Threshold Voltage 1.16 1.25 1.33 Hysteresis (VHYST) 20 50 80 Unit V mV PGI, Analog Input Parameter Conditions MIN TYP MAX 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 1.05 1.13 1.21 V Hysteresis (VHYST)* -20 -50 -80 mV * All of the comparator for PGI input in block diagram. 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=10mA MIN TYP MAX Unit 5 uA 0.3 V Switching Characteristics, Vcc=12V, Ta = Full range. 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 Over Current Delay Time (Td4) 13 20 27 mS PSON/ De-bounce Time (Tb1) 24 38 52 mS FPO/ Noise De-glitch Time (Tb2) 47 73 100 uS PGO Noise De-glitch Time (Tb3) 47 73 100 uS 3-Channel Secondary Monitoring IC Version：A.001 -6- PS222S Application Typical 4 rails SPS (Dual 12V OCP) S.P.S. Secondary Side RS5 +5V Output RS33 +3.3V Coil +3.3V Output RS12(1) +12V(1) Coil +12V(2) Coil ROC5 ROC33 ROC12(1) ROC12(2) ROS or +12V(2) Output DV DI 5.6K = +12V(1) Output RS12(2) RPGO 4.7K +5VSB 1 PGI PGO 14 PGO 2 GND VSx 13 +5VSB 3 FPO/ VS5 12 1K PSON 4 PSON/ VS33 11 5 IS12 VS12 10 7 ISx IS5 8 0.1 uF IS33 9 0.1 uF 6 RI Cby RI RPGI CPGI CPSON PS222S 0.1 uF 0.1 uF 3-Channel Secondary Monitoring IC Version：A.001 -7- PS222S Application (Continued) Typical 3 rails SPS (Single 12V OCP) S.P.S. Secondary Side RS5 +3.3V Coil +3.3V Output RS12 +12V Coil +12V Output ROC5 ROC33 ROC12 = +5V Output RS33 or RPGO 4.7K +5VSB 1 PGI PGO 14 PGO 2 GND VSx 13 +5VSB 3 FPO/ VS5 12 1K PSON 4 PSON/ VS33 11 5 IS12 VS12 10 7 ISx IS5 8 0.1 uF IS33 9 0.1 uF 6 RI Cby RI RPGI CPGI CPSON 3-Channel Secondary Monitoring IC PS222S 0.1 uF Version：A.001 -8- PS222S 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 20 µ (2) RS5=0.002 Ω , ∆V5V = 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 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. PS222S uses single 12VOCP protection function: As “Typical 3 rails SPS” application circuit, the pin7(ISx) must be connected a resistor(Resistance>10kΩ) to GND or floating. 3-Channel Secondary Monitoring IC Version：A.001 -9- PS222S Package Specification ( 14-pin DIP ) E1 E eB θ° D A2 A Seating Plane A1 b1 b 0 e S 5 10 0.0 Symbol Dimension in mm (MAX) Dimension in inch A 5.330 A1 0.380 (MIN) 0.015 (MIN) A2 3.300 ± 0.130 0.130 ± 0.005 (TYP) b 1.520 (TYP) 0.060 0.460 (TYP) 0.018 (TYP) D 19.400 ± 0.200 0.764 ± 0.008 E 7.620 (TYP) 0.300 (TYP) E1 6.350 ± 0.130 0.250 ± 0.005 e 2.540 (TYP) 0.100 (TYP) eB 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° 20 25 mm 1.0 inch NOTE (MAX) b1 θ° 15 0.5 0.210 L 0° ~ 15° 3-Channel Secondary Monitoring IC Version：A.001 -10- PS222S Package Specification (Continued) ( 14-pin SOP ) E H h x 45° D A C A1 B θ e L Seating Plane 0 5 0.0 Dimension in mm Symbol MIN. 0.2 Dimension in inch MAX. MIN. MAX. A 1.35 1.75 0.0532 0.0688 A1 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 10 1.27BSC mm 0.4 inch NOTE 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 θ 0° 8° 0° 8° 3-Channel Secondary Monitoring IC Version：A.001 -11- PS222S 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. 3-Channel Secondary Monitoring IC Version：A.001 -12-