SC6105 SILAN | Alldatasheet
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HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 1 of 9 VOLTAGE MODE PWM POWER SUPPLY WITH BUILTIN SUPERVISOR, PROTECTION AND REGULATION
DESCRIPTION
The SC6105 is a switching mode power supply controller for computers. It can regulator the output voltages by providing PWM signals to drive a transform er. It mo nitors and protects the 3.3V/±5V/±12V outputs. Two internal TL431 shunt regulators provide stable reference voltage for 3.3V and 5Vstandby regulator. Remote ON/OFF control, power good circuitry, over voltage and under voltage protection circuitry and over power protection circuitry is implemented.
FEATURES
- Over voltage protection for 3.3V/5V/12V * Under voltage protection for 3.3V/±5V/±12V * Over power protection * Short circuit protection * ACinput under voltage protection * Power good circuitry * PSON for remote controller * Delay time for PSON or PG signals * Two shunt regulators for 3.3V and 5Vstandby * soft start and maximum 93% duty cycle DIP203002.54
APPLICATIONS
- Switching mode power supply for computers.
ORDERING INFORMATION
SC6105B DIP203002.54
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 2 of 9 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATING Characteristics Symbol Rating Unit Supply Voltage(pin20) VCC 12 V Regulator Output At FB1, FB2 Pins VFB 16 V Output Current At PG, FB1, FB2 Pins IOUT 30 mA Power Dissipation(Tamb=25°C) PD 1.5 W Power Dissipation(Tamb=90°C) PD 0.5 W Thermal Resistance, JunctionToAir RșJA 82.5 °C/W Operating Temperature Range Ta mb 30 ~ +125 °C Storage Temperature Range Tstg 55~+155 °C ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VCC=5V, Ta mb=25°C) Characteristics Symbol Test condition Min. Typ. Max. Unit Supply Voltage VCC All function is normal. 4.5 5.0 7.0 V Supply Current ICC PG High 5 10 mA OverVoltage Protection 3.3V VOVP1 3.9 4.1 4.3 V OverVoltage Protection 5V VOVP2 5.8 6.1 6.5 V OverVoltage Protection 12V VOVP3 13.9 14.5 14.9 V UnderVoltage Protection 3.3V VUVP1 2.0 2.6 2.8 V (To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 3 of 9 (Continued) Characteristics Symbol Test condition Min. Typ. Max. Unit UnderVoltage Protection 5V VUVP2 3.0 3.6 3.9 V UnderVoltage Protection 12V VUVP3 6.0 7.2 8.0 V UnderVoltage Sense 3.3V For PG Low VUVS1 2.5 2.8 3.0 V UnderVoltage Sense 5V For PG Low VUVS2 4.0 4.3 4.5 V UnderVoltage Sense 12V For PG Low VUVS3 9.4 10.1 10.4 V Negative Voltage Protection: Voltage Level VNVP 2.0 2.1 2.2 V Negative Voltage Protection: Source Current INVP R I = 75KΩ 57 64 72 ȝA Timing For OverVoltage Protection tOVP R I = 75KΩ 0.5 0.7 1.3 ms Timing For UnderVoltage Protection tUVP R I = 75KΩ 0.9 2.4 3.8 ms Timing For UnderVoltage Sense for PG Low tUVS R I = 75KΩ 0.5 1.2 1.9 ms Timing for OverPowerProtection tOPP R I = 75KΩ 4.0 7.0 10.0 ms Timing for Negative Voltage Protection tNVP RI = 75K Ω 4.0 7.0 10.0 ms Reference Voltage VREF I FB = 0.5mA, Ta mb = 25°C 2.475 2.5 2.525 V Line Regulation REGLIFB 4 < VFB < 16V 1 MV/V Shunt Regulator (FB1,VREF1, FB2,VREF2) Output Sinking Current Capability IOUTFB VFB > 2V 10 mA Timing for PG Delay tPG RI = 75KΩ 200 300 400 ms UVAC Voltage Sense for PG VUVAC 0.65 0.7 0.75 V PG Good Output Rising Time tR CL = 100pF 1 us PG Good Falling Time tF CL = 100pF 300 ns Power Good Output Saturation Level VOL2 I PG = 5mA 0.5 V Power Good Power Good Leakage Current Collector ION2 V PG = 5V 1 ȝA PSON Input Threshold Level VPSON 1 1.4 2.0 V Remote Input Driving Current IPSON 0.5 mA Timing PSON to On/Off On Off (PSoff) tPSON(ON) tPSON(OFF) RI = 75kΩ 20 ms Remote On/Off Timing PG low to Power Off tPSOFF R I = 75kΩ 2 4.8 6.5 ms (To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 4 of 9 (Continued) Characteristics Symbol Test condition Min. Typ. Max. Unit Reference Voltage V2.5 2.45 2.5 2.55 V Input Bias Current IIB 0.1 ȝA OpenLoop Voltage Gain AVOL 50 60 dB Unity Gain Bandwidth BW 0.3 1 MHz Error Amplifier Power Supply Rejection Ratio PSRR 50 dB Oscillator PWM Frequency FOSC R I = 75kΩ 60 65 70 kHz Charge Current ISS RI = 75kΩ 4.0 5.7 7.0 ȝA SoftStart Duty Cycle DC 85 93 % Output Voltage Low VOL Io = 5mA 0.5 V Output Voltage High VOH V12 = 12V 4 VP WM Output Output Impedance of VOH RO 1.5 3.3 kΩ PIN CONFIGURATIONS PIN DESCRIPTIONS Pin No. Pin Name Description 1 PSON Remote On/Off logic input for CPU or controller. Turn on/off the PWM Output. 2 V33 3.3V overvoltage/undervoltage control sense input. 3 V5 5V overvoltage/undervoltage control sense input. 4 OPP Overpower sense input. 5 UVAC AC fail detection. 6 NVP The protection input for negative output. 7 V12 12V overvoltage/undervoltage control sense input. (To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 5 of 9 (Continued) Pin No. Pin Name Description
8 OP2
The totempole output drivers of pushpull PWM. The maximum duty cycle on an output (OP1 or OP2) is 46%. 9 OP1 The totempole output drivers of pushpull PWM. 10 PG Power Good logic output, 0 or 1 (opencollector). PG=1 means that the power is good for operation. 11 FB2 Output for second converter regulation loop. 12 VREF2 Reference comparison input for second converter regulation loop. 2.5V. 13 VREF1 Reference comparison input for first converter regulation loop. 2.5V. 14 FB1 Output for first converter regulation loop. 15 GND Ground. 16 COMP Error amplifier output and the input of the PW M comparator. 17 IN The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference voltage. 18 SS The softstart. It is settable through external capacitor. The current source output at this pin is 5.7uA and the voltage is clamped at 2.5V. 19 RI Connected to external resistor for the reference setting. 20 VCC Supply voltage. It is connected to 5Vstandby. FUNCTION DESCRIPTION SC6105 have functions below:AC Powerdown Detection, Over Power Protection (OPP), Negative Voltage Protection, Overvoltage and undervoltage protection, Powerdown warning for power good signal, Power good signal and powerfail lockup, Remote on/off control, Complete pulse width modulation (PWM) control circuitry, Onchip oscillator, Programmable SoftStart and so on. TIMING DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 6 of 9 TYPICAL APPLICATION CIRCUIT Note:The circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test .
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 7 of 9 DETAIL APPLICATION CIRCUIT
HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.4 2008.04.17 Http://www.silan.com.cn Page 8 of 9 PACKAGE OUTLINE DIP203002.54 UNIT: mm 6.60±0.25 7.62TYP 0.25±0.10 4.36MAX3.00MIN HANDLING MOS DEVICES: Electrostatic charges can exist in many things. All of our MOS devices are internally protected against electrostatic discharge but they can be damaged if the following precautions are not taken:
- Persons at a work bench should be earthed via a wrist strap.
- Equipment cases should be earthed.ҏ
- All tools used during assembly, including soldering tools and solder baths, must be earthed.
- MOS devices should be packed for dispatch in antistatic/conductive containers.