SILICON TOUCH TECHNOLOGY INC

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1 Version : PRE.005 Issue Date : 2012/02/20 File Name Total Pages : 14 : SP-PS257-PRE.005.doc 4-Channel Secondary Monitoring IC with Fan Control 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: Fax:

2 General Description PS257 is designed for monitoring a switching power supply (S.P.S.), especially for desktop ATX system. It protects the S.P.S. and PC from over voltage, under voltage, over current, short circuit and over temperature status. It monitors dual +12V, 5V, 3.3V and -12V DC supply channels. PS257 also provides a FAN drive module with two control modes - "step control mode" and "OP-amp control mode". It adjusts the FAN speed according to the sensed temperature and generates "over-temperature protection" when the temperature is too high. It monitors the power-good-input signal (PGI) from SPS and generates power-good-output signal (PGO) to motherboard. Therefore it enables/disables protection according to the SPS status and provides a reliable power supply environment. Features Over-Voltage/Under-Voltage Protection (OVP & UVP) and lock out It monitors 3.3V, 5V, -12V and dual +12V. FPO/ goes to high and latch-up when one of these supply voltages exceeds their normal operation voltage range. Over Current Protection (OCP) and lock out It monitors 3.3V, 5V and dual +12V. FPO/ goes to high and latch-up when one of these supply currents exceeds their normal operation current range. PGO (Power Good Output) signal generation- It generates PGO to motherboard according to the power status. Over Temperature Protection (OTP) and lock out. FAN drive control with two modes: "step control mode" and "OPamp control mode" Wide power supply range (3.8V~16V) Fault-protection output with open drain output stage LED lighting-up when error occurs or remote-off Built-in delay/debounce for the following important timing features: 300mS power good output delay when remote-on 75ms delay for UV/OC protection when AC-on 38mS PSON/ control de-bounce 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 1

3 Block Diagram VS12A R1 R2 12 UV 12 OV delay 22uS S R Q 1MΩ FPO/ VS12B R3 R1 38mS De-bounce delay H : 4mS L : 4.5uS VCCI 1MΩ LED 12 UV R2 R3 12 OV VCCI 2KΩ 30KΩ VCC PSON/ VS5 R4 4.5V 90KΩ 5 UV R5 R6 5 OV delay H : 75mS L : 4.5uS PGI Selection 1.2V PGI VS33 R7 VCC VCC R8 3.3 UV GND 3.3 OV VCCI IS12A R9 Step Down to near 2.5V VCCI 12 OC 73uS De-bounce delay H : 300mS L : 4.5uS 1MΩ PGO IS12B IS5 IS33 Iref X 8 Step Down to near 2.5V Iref X 8 Step Down to near 2.5V Iref X 8 Step Down to near 2.5V Iref X 8 VCCI VCCI VCCI 12 OC 5 OC 3.3 OC delay 56uS delay H : 20mS L : 4.5uS Internal Power Band-Gap Reference 1.25V delay 56uS Power On Reset VCCI = 4V Clock Generator POR CLK -12 OV -12 UV OT -12 V block Fan block NVS12 VTL VTS FB FDRV 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 2

4 Pin Descriptions Pin No Pin No PIN NAME Descriptions (20 Pin) (24 Pin) 1 3 PGI Power good input signal pin 2 4 GND Ground 3 5 FPO/ Inverted fault protection output,open drain output stage 4 6 PSON/ Remote ON/OFF control input pin 5 7 NVS12-12V over/under voltage protection input pin 6 8 LED LED drive output 7 9 FDRV FAN drive output 8 10 FB FAN feedback voltage input 9 11 VTS Temperature sense voltage VTL Low temperature threshold voltage IS12B 12V(1) over current protection input pin VS12B 12V(2) over/under voltage protection input pin IS12A 12V(2) over current protection input pin VS12A 12V(1) over/under voltage protection input pin IS5 5.0V over current protection input pin VS5 5.0V over/under voltage protection input pin IS33 3.3V over current protection input pin VS33 3.3V over/under voltage protection input pin VCC Power supply PGO Power good output signal pin, open drain output stage 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 3

5 Absolute Maximum Ratings Parameter Rating Unit Storage Temperature (Tstg) -40 to +125 C Operating Temperature (Topr) -10 to +90 C Supply Voltage (VCC) VCC -0.3 to V VS12A,IS12A,VS12B,IS12B -0.3 to V VS5, IS5-0.3 to +9.0 V VS33, IS to +7.0 V Input Voltage Range (VI) PGI -0.3 to Vcc+0.3 V VTS,VTL -0.3 to VS12B+0.3 V PSON/ -0.3 to Vcc+0.3 V FB -0.3 to VS12B+0.3 V NVS to -16 V Output Voltage Range (VO) FPO,LED,PGO -0.3 to Vcc+0.3 V FDRV -0.3 to VS12B+0.3 V ESD Susceptibility (VESD) HBM > 2000 V MM > 200 V Electrical Characteristics, Vcc=12V, T a = 25 C. (unless otherwise specified) Power Supply Section Supply Voltage V Supply Current VPSON/ = 5V ma Power On Reset Threshold Voltage (VPOR) V Under Voltage Lockout (UVLO) V Over-Voltage Section Over-Voltage Threshold VS V VS V VS12A/B V NVS V 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 4

6 Electrical Characteristics (Continued) Under-Voltage Section Under-Voltage Threshold VS V VS V VS12A/B V NVS V PGI, Analog Input Threshold Voltage for start T d V Threshold Voltage for start T d V Threshold Voltage for mask OC,UV,PGO V PGO, Open Drain Digital Output Leakage Current (ILKG) VPGO=5V 5 ua Low Level Output Voltage (VOL) ISINK=10mA 0.3 V Over-Current Section Offset Voltage (VOV) mv Constant I sink Current (I sink ) ua FPO/, Open Drain Digital Output Leakage Current (ILKG) VFPO/=5V 5 ua Low Level Output Voltage (VOL) ISINK=20mA 0.45 V 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 5

7 Electrical Characteristics (Continued) LED, Open Drain Digital Output Leakage Current (ILKG) VLed=5V 5 ua Low Level Output Voltage (VOL) ISINK=10mA 0.3 V PSON/, Analog Input Threshold Voltage ( High ) 1.60 V Threshold Voltage ( Low ) 0.9 V VTS, Analog Input Input Current (IVTS) 1 μa Full Speed Voltage (VFULL-VTS),(VTH=1/2VS12B) OP Mode 6 V *1 Fan driver application FB, Analog Input FAN Output Mode Threshold Voltage 3 V FDRV, Analog output FAN driver sink current IF-SINK=1mA 5.5 V 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 6

8 Electrical Characteristics (Continued) Switching Characteristics, Vcc=12V, T a = 25 C. PGI to PGO Delay Time (Td1) ms Short Circuit Delay Time (Td2) PGI< 0.63V Disable UV/OC Protection PGI> 0.63V ms PGO to FPO/ Delay Time (Td3) ms Under Voltage Delay Time (Td4) us Over Current Delay Time (Td5) ms Over Voltage Delay Time (Td6) us Over Temperature Delay Time (Td7) us NVS12 Over/Under Voltage Delay Time (Td8) us PSON/ De-bounce Time (Tb1) ms PGO Noise De-glitch Time (Tb2) us 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 7

9 Electrical Characteristics (Continued) Fan driver application VS12B VS12B Step Mode (V FB <3V) VTS VTL VTS>VTL ½VS12B VTL > VTS>VTH 0V VTH>VTS FB FDRV VTS>VTL=> FDRV=VS12B VTL>VTS>VTH => FDRV=½VS12B VTH>VTS=> FDRV=0V #V TH =½VS12B VS12B OP Mode (V FB >3V) Min(VTL,VTS) - + FDRV FB V FB =Min(VS12B,VS12B-[Min(V TL,V TS )- V TH ]) #V TH =½VS12B Over Temperature Protection (OTP) OTP function 5.4 VTS 5. 4 (VTS< VS12B) 12 VS12B OT 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 8

10 Electrical Characteristics (Continued) <Typical switching power supply application > Switching Power Supply Secondary Side 5V Coil-out +3.3 V Coil-out +12V(A) Coil-out +12V(B) Coil-out -12V Coil-out Rs5 Rs33 Rs12A Rs12B Rsn12 5V DC-out 3.3 V DC-out 12V(A) DC-out 12V(B) DC-out -12 DC-out Zener or Res Roc5 Roc33 Roc12A Roc12B PSON/ 158k Rpgo +5V(SB) 1k R_led Cpgi Rpgi +12V(B) Coil-out Fan Control Application Circuit PGI GND FPO/ PSON/ NVS12 LED FDRV FB VTS VTL PGO VCC VS33 IS33 VS5 IS5 VS12A IS12A VS12B IS12B Cby PGO +5(SB) PS257 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 9

11 Package Specification ( 20-pin DIP ) Symbol Dimension in mm Dimension in inch A (MAX) (MAX) A (MIN) (MIN) A ± ± b (MAX) (MAX) b (MAX) (MAX) D (MAX) 1.04 (MAX) E (TYP) (TYP) E (MAX) (MAX) e (MAX) (MAX) eb ± ± L (MAX) (MAX) S (MAX) (MAX) θ 0 ~ 15 0 ~ 15 NOTE 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 10

12 Package Specification ( 20-pin SOP ) E H 0.020(inch) x45 D A b e A 1 L θ Dimension in mm Dimension in inch Symbol MIN. MAX. MIN. MAX. A A b 0.41BSC 0.016BSC e 1.27BSC 0.050BSC D H E L θ NOTE 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 11

13 Package Specification ( 24-pin SSOP ) D E E A C GAUGE PLANE A2 A b e SEATING PLANE L L1 A1 DETAIL A DIMENSIONS IN INCH DIMENSIONS IN MM SYMBOLS MIN. MAX. MIN. MAX. A A A b C D E E e BSC BSC L L BSC BSC Θ Channel Secondary Monitoring IC Version: PRE.005 PAGE 12

14 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. 4-Channel Secondary Monitoring IC Version: PRE.005 PAGE 13

FC122. Fan Speed Control IC. Version : A.002 Issue Date : 2009/07/17 File Name : SP-FC122-A.002.doc Total Pages: 10

FC122. Fan Speed Control IC. Version : A.002 Issue Date : 2009/07/17 File Name : SP-FC122-A.002.doc Total Pages: 10 Version : A.002 Issue Date : 2009/07/17 File Name : SP-FC122-A.002.doc Total Pages: 10 Fan Speed Control 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