SC6105 VOLTAGE MODE PWM POWER SUPPLY WITH BUILT-IN 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 transformer. It monitors and protects the 3.3V/±5V/±12V outputs. Two internal TL431 shunt regulators provide stable reference voltage for 3.3V and 5V-standby regulator. Remote ON/OFF control, power good circuitry, over voltage and under voltage protection circuitry and over power protection circuitry is implemented. DIP-20-300-2.54 FEATURES * Over voltage protection for 3.3V/5V/12V * Under voltage protection for 3.3V/±5V/±12V * Over power protection * Short circuit protection * AC-input under voltage protection * Power good circuitry APPLICATIONS * Switching mode power supply for computers. * PSON for remote controller * Delay time for PSON or PG signals * Two shunt regulators for 3.3V and 5V-standby * soft start and maximum 93% duty cycle ORDERING INFORMATION Part SC6105B Package DIP-20-300-2.54 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 1 of 9 SC6105 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, Junction-To-Air R JA 82.5 °C/W Operating Temperature Range Tamb -30 ~ +125 °C Storage Temperature Range Tstg -55~+155 °C ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VCC=5V, Tamb=25°C) Characteristics Symbol Test condition Min. Typ. Max. Unit 4.5 5.0 7.0 V -- 5 10 mA 3.9 4.1 4.3 V Supply Voltage VCC All function is normal. Supply Current ICC PG High Over-Voltage Protection 3.3V VOVP1 - Over-Voltage Protection 5V VOVP2 - 5.8 6.1 6.5 V Over-Voltage Protection 12V VOVP3 - 13.9 14.5 14.9 V Under-Voltage Protection 3.3V VUVP1 - 2.0 2.6 2.8 V (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 2 of 9 SC6105 (Continued) Characteristics Symbol Test condition Min. Typ. Max. Unit Under-Voltage Protection 5V VUVP2 - 3.0 3.6 3.9 V Under-Voltage Protection 12V VUVP3 - 6.0 7.2 8.0 V Under-Voltage Sense 3.3V For PG Low VUVS1 - 2.5 2.8 3.0 V Under-Voltage Sense 5V For PG Low VUVS2 - 4.0 4.3 4.5 V Under-Voltage Sense 12V For PG Low VUVS3 - 9.4 10.1 10.4 V Over-Power Protection. VOPPS VUVAC = 1.5V 2.02 2.4 2.66 V VNVP - 2.0 2.1 2.2 V INVP RI = 75KΩ 57 64 72 A Timing For Over-Voltage Protection tOVP RI = 75KΩ 0.5 0.7 1.3 ms Timing For Under-Voltage Protection tUVP RI = 75KΩ 0.9 2.4 3.8 ms tUVS RI = 75KΩ 0.5 1.2 1.9 ms tOPP RI = 75KΩ 4.0 7.0 10.0 ms tNVP RI = 75KΩ 4.0 7.0 10.0 ms VREF IFB = 0.5mA, Tamb = 25°C 2.475 2.5 2.525 V - 1 - MV/V VFB > 2V 10 - - mA RI = 75KΩ 200 300 400 ms - 0.65 0.7 0.75 V Negative Voltage Protection: Voltage Level Negative Voltage Protection: Source Current Timing For Under-Voltage Sense for PG Low Timing for Over-Power-Protection Timing for Negative Voltage Protection Shunt Reference Voltage Regulator Line Regulation (FB1,VREF1, Output Sinking Current FB2,VREF2) Capability Timing for PG Delay UVAC Voltage Sense for PG PG Good Output Rising Power Good Time PG Good Falling Time Power Good Output Saturation Level Power Good Leakage Current Collector PSON Input Threshold Level Remote Input Driving Remote On/Off Current REGLI-FB 4 < VFB < 16V IOUT-FB tPG VUVAC tR CL = 100pF - 1 - us tF CL = 100pF - 300 - ns VOL2 IPG = 5mA - - 0.5 V ION2 VPG = 5V - - 1 A VPSON - 1 1.4 2.0 V IPSON - - - 0.5 mA tPSON(ON) RI = 75kΩ 20 40 50 ms tPSON(OFF) 10 20 30 2 4.8 6.5 Timing PSON to On/Off On Off (PS-off) Timing PG low to Power Off tPSOFF RI = 75kΩ ms (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 3 of 9 SC6105 (Continued) Characteristics Test condition Min. Typ. Max. Unit Reference Voltage V2.5 - 2.45 2.5 2.55 V Input Bias Current IIB - - - 0.1 A AVOL - 50 60 - dB BW - 0.3 1 - MHz 50 - - dB Error Open-Loop Voltage Gain Amplifier Unity Gain Bandwidth Power Supply Rejection Ratio Oscillator Symbol PSRR PWM Frequency FOSC RI = 75kΩ 60 65 70 kHz Charge Current ISS RI = 75kΩ 4.0 5.7 7.0 A Duty Cycle DC - 85 - 93 % Output Voltage Low VOL Io = 5mA - - 0.5 V PWM Output Voltage High VOH V12 = 12V 4 - - V Output Output Impedance of RO - 1.5 - 3.3 kΩ Soft-Start VOH PIN CONFIGURATIONS PIN DESCRIPTIONS Pin No. Pin Name 1 PSON Description 2 V33 3.3V over-voltage/under-voltage control sense input. 3 V5 5V over-voltage/under-voltage control sense input. 4 OPP 5 UVAC 6 NVP The protection input for negative output. 7 V12 12V over-voltage/under-voltage control sense input. Remote On/Off logic input for CPU or controller. Turn on/off the PWM Output. Over-power sense input. AC fail detection. (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 4 of 9 SC6105 (Continued) Pin No. Pin Name 8 OP2 9 OP1 Description The totem-pole output drivers of push-pull PWM. The maximum duty cycle on an output (OP1 or OP2) is 46%. The totem-pole output drivers of push-pull PWM. Power Good logic output, 0 or 1 (open-collector). PG=1 means that the power is 10 PG 11 FB2 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 15 GND 16 COMP 17 IN 18 SS 19 RI 20 VCC good for operation. Output for second converter regulation loop. Output for first converter regulation loop. Ground. Error amplifier output and the input of the PWM comparator. The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference voltage. The soft-start. It is settable through external capacitor. The current source output at this pin is 5.7uA and the voltage is clamped at 2.5V. Connected to external resistor for the reference setting. Supply voltage. It is connected to 5V-standby. FUNCTION DESCRIPTION SC6105 have functions below: AC Power-down Detection, Over Power Protection (OPP), Negative Voltage Protection, Over-voltage and under-voltage protection, Power-down warning for power good signal, Power good signal and power-fail lockup, Remote on/off control, Complete pulse width modulation (PWM) control circuitry, On-chip oscillator, Programmable Soft-Start and so on. TIMING DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 5 of 9 SC6105 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 Http://www.silan.com.cn REV:1.4 2008.04.17 Page 6 of 9 SC6105 DETAIL APPLICATION CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 7 of 9 SC6105 PACKAGE OUTLINE 3.00MIN 4.36MAX 7.62TYP 0.25±0.10 UNIT: mm 6.60±0.25 DIP-20-300-2.54 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. • 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. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.4 2008.04.17 Page 8 of 9