HS8108 HUAXIN | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 9
Technical content
1 Ver. 060122 HS HS HS HS8108 8108 8108 8108 DATASHEET DATASHEET DATASHEET DATASHEET DESCRIPTION DESCRIPTION DESCRIPTION DESCRIPTION： HS8108 is a power supply switching mode controller IC for desktop PCs. It provides all the functions necessary to monitor and control the output of the power supply. Remote ON/OFF control, power good circuitry, some protection features against over-voltage and over-power are implemented. It directly senses all the output rails for OVP without the need of external dividers. A built-in timer generates accurate timing for control circuit including the PS-off delay. The cycle-by-cycle PWM switching prevents the power transformer from saturation and ensure the fastest response for the short-circuit protection which greatly reduce the stress for power transistors. Two internal precise 431 shunt regulators provide stable reference voltage and driver for 3.3V and 5V-standby regulation. Utilizing minimum number of external components, the HS8108 includes all of the functions for push-pull and/or half-bridge topology, decreasing the production cost and PCB space,and increasing the MTBF for power supply. FEATURES FEATURES FEATURES FEATURES： PC half-bridge (or 494) power supply supervisor + two 431 + PWM Remote ON/OFF function Power-down warning circuitry ﹠ Power good circuitry Delay time for PSON and PG signal Over-voltage protection for 3.3V, 5V and 12V Under-voltage protection for 3.3V, 5V,12V, -12V and/or -5V Push-pull PWM operation and totem pole outputs Over-power and short-circuit protection Two shunt regulator for 3.3V and 5V Sb Soft-start and maximum 93% duty cycle On-chip oscillator and error amplifier
2 Ver. 060122 PIN CONFIGURATION PIN CONFIGURATION PIN CONFIGURATION PIN CONFIGURATION：： ：：(DIP (DIP (DIP (DIP20) 20) 20) 20) PIN DESCRIPTIONS PIN DESCRIPTIONS PIN DESCRIPTIONS PIN DESCRIPTIONS：： ：： Pin Name Type Function
1 PSON Logic input
Remote On/Off logic input for CPU or controller. PSON = 0 means that the main SMPS is operational. PSON =1 means that the main SMPS is off and the latch is reset. 2 V33 Analog input 3.3V over-voltage/under-voltage control sense input. 3 V5 Analog input 5V over-voltage/under-voltage con trol sense input. 4 OPP Analog input Over-power sense input. When not in use, this pin should be grounded.
5 UV AC Analog input AC fail detection, detect main AC voltage under-voltage and/or
failure.
6 NVP Analog input The protection input for negativ e output
7 V12 Analog input 12V over-voltage/under-voltage c ontrol sense input.
8 OP2 Analog output The totem-pole output drivers of push-pull PWM, the maximum duty
cycle on an output (OP1 or OP2) is 46%. 9 OP1 Analog output 10 PG Logic output Power Good logic output, 0 or 1 (open-collector). PG = 1 means that the power is good for operation. 11 FB2 Analog output Output for second converter re gulation loop. 12 VREF2 Analog input Reference comparison input for second converter regulation loop. 2.5V . 13 VREF1 Analog input Reference comparison input fo r first converter regulation loop. 2.5V . 14 FB1 Analog output Output for first converter reg ulation loop. 15 GND supply Ground. 16 COMP Analog output amplifier output and the inpu t of the PWM comparator. 17 IN Analog input The negative input of error amplifier. The positive input of error amplifier is a 2.5V reference voltage. 18 SS Analog input The soft-start. It is settable through external capacitor. The current source output at this pin is 8uA and the voltage is clamped at 2.5V . 19 RI Analog input Connected to external resistor for the reference setting. RI = 75k ohms.
3 Ver. 060122 BLOCK DIAGRAM BLOCK DIAGRAM BLOCK DIAGRAM BLOCK DIAGRAM：： ：： ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS： Symbol Parameter Value Unit VCC DC Supply V oltage at Pin 20 11 V VFB Shunt Regulator Output at Fb1, Fb2 Pins 16 V IOUT Output Current at PG , Fb1, Fb2 Pins 30 mA PD,25 ℃ Power Dissipation (TA=25 ℃) 1.5 W PD,90 ℃ Power Dissipation (TA=90 ℃) 0.5 W TSTG Storage Temperature Range -55 ～+150 ℃ TA,MAX Operating Ambient Temperature -30 ～+125 ℃ RECOMMENDED OPERATING CONDITIONS RECOMMENDED OPERATING CONDITIONS RECOMMENDED OPERATING CONDITIONS RECOMMENDED OPERATING CONDITIONS：： ：： Symbol Parameter Value Unit VCC DC Supply V oltage at Pin 20 4.5 ～6.5 V VFB Shunt Regulator Output at Fb1, Fb2 Pins 4～16 V TOPER Operating Ambient Temperature Range -25 ～+85 ℃
4 Ver. 060122 ELECTRICAL CHARACTERISTICS (VCC = 5V, TA = 25 ELECTRICAL CHARACTERISTICS (VCC = 5V, TA = 25 ELECTRICAL CHARACTERISTICS (VCC = 5V, TA = 25 ELECTRICAL CHARACTERISTICS (VCC = 5V, TA = 25°° °°C) C) C) C) Symbol Parameter Test Condition Min. Typ. Max. unit ICC Total Supply Current PG High --- 5 10 mA Vovp1 Over-Voltage Protection3.3V --- 3.9 4.1 4.3 V Vovp2 Over-Voltage Protection5V --- 5.8 6.1 6.5 V Vovp3 Over-Voltage Protection12V --- 13.9 14.5 14.9 V Vuvp1 Under-Voltage Protection 3.3V --- 2.0 2.6 2.8 V Vuvp2 Under-Voltage Protection 5V --- 3.0 3.6 3.9 V Vuvp3 Under-Voltage Protection 12V --- 6.0 7.2 8.0 V Vuvs1 Under-Voltage Sense 3.3V for PG Low --- 2.5 2.8 3.0 V Vuvs2 Under-Voltage Sense 5V for PG Low --- 4.0 4.3 4.5 V Vuvs3 Under-Voltage Sense 12V for PG Low --- 9.4 10.1 10.4 V Vnvp Negative Voltage Protection: Voltage Level --- 2.0 2.1 2.2 V Invp Negative Voltage Protection: Source Current RI=75KΩ 57 64 72 uA tovp Timing for Over-Voltage Protection RI=75KΩ 0.37 0.7 1.35 ms tuvp Timing for Under-Voltage Protection RI=75KΩ 0.8 2.4 3.75 ms tuvs Timing for Under- Voltage Sense for PG Low RI=75KΩ 0.37 1.2 1.88 ms topp Timing for Over-Power-Protection RI=75KΩ 3.3 7 11.3 ms tnvp Timing for Negative Voltage Protection RI=75KΩ 3.3 7 10.2 ms NOTE *1:VOPPS=(2/3)Vopp+(1/3)Vuvac Shunt Regulator Shunt Regulator Shunt Regulator Shunt Regulator: (VREF1 FB1 VREF2 FB2) : (VREF1 FB1 VREF2 FB2) : (VREF1 FB1 VREF2 FB2) : (VREF1 FB1 VREF2 FB2) Symbol Parameter Test Condition Min. Typ. Max. unit VREF Reference Voltage IFB=0.5Ma,TA=25℃ 2.475 2.5 2.525 V VDEV,I Deviation of VREF Over Load Current IFB=0.5mA～10mA --- --- 20 mV VDEV,T Deviation of VREF Over Temperature TA=-25～+85℃ --- 10 30 mV REGLI-FB Line Regulation 4V<VFB<16V --- 1 --- mv/v IOUT-FB Output Sinking Current Capability VFB>2V 10 --- --- mA Error Amplifier Error Amplifier Error Amplifier Error Amplifier:: :: Symbol Parameter Test Condition Min. Typ. Max. unit V2.5 Reference Voltage --- 2.45 2.5 2.55 V IB Input Bias Current --- --- --- 0.1 uA Avol Open-Loop Voltage Gain --- 50 60 --- db BW Unity Gain Bandwidth --- 0.3 1 --- MHz PSRR Power Supply Rejection Ratio --- 50 --- --- db
5 Ver. 060122 Remote On/Off Remote On/Off Remote On/Off Remote On/Off:: :: Symbol Parameter Test Condition Min. Typ. Max. unit Vpson PSON Input Threshold Level --- 1 1.4 2.0 V Ipson Remote Input Driving Current --- --- --- 0.5 mA tpson(ON) Timing PSON to On RI=75KΩ 17 26 45 ms tpson(OFF) Timing PSON to Off RI=75KΩ 5 7.5 28.8 ms tpsoff Timing PG low to Power Off RI=75KΩ 1.5 2 6.3 ms Power Good Section Power Good Section Power Good Section Power Good Section(PG): (PG): (PG): (PG): Symbol Parameter Test Condition Min. Typ. Max. unit tpg Timing for PG Delay RI=75KΩ 200 300 400 ms Vuvac UVAC Voltage Sense for PG --- 0.65 0.7 0.75 V tr PG Good Output Rising Time CL=100pF --- 1 --- us tf PG Good Falling Time CL=100pF --- 300 --- ns VOL2 Power Good Output Saturation Level Ipg=5mA --- --- 0.5 V ION2 Power Good Leakage Current Collector Vpg=5V --- --- 1 uA PWM: PWM: PWM: PWM: Symbol Parameter Test Condition Min. Typ. Max. unit PWM Output Section (OP1, OP2) PWM Output Section (OP1, OP2) PWM Output Section (OP1, OP2) PWM Output Section (OP1, OP2) Vol Output Voltage Low Io=5mA --- --- 0.5 V Voh Output Voltage High V12=12V 4 --- --- V Ro Output Impedance of VOH --- 1.5 --- 3.3 KΩ Oscillator Section Oscillator Section Oscillator Section Oscillator Section Fosc PWM Frequency RI=75KΩ 60 65 70 KHz Soft Soft Soft Soft-- --Start Section Start Section Start Section Start Section Iss Charge Current RI=75KΩ 6 8 9.3 uA Comparator Section Comparator Section Comparator Section Comparator Section DC Duty Cycle 85 --- 93 %
6 Ver. 060122 TIMING DIAGRAM TIMING DIAGRAM TIMING DIAGRAM TIMING DIAGRAM:: ::
7 Ver. 060122 APPLICATION 1 APPLICATION 1 APPLICATION 1 APPLICATION 1：： ：：
8 Ver. 060122 APPLICATION 2 APPLICATION 2 APPLICATION 2 APPLICATION 2：： ：：
9 Ver. 060122 MECHANICAL DIMENSIONS MECHANICAL DIMENSIONS MECHANICAL DIMENSIONS MECHANICAL DIMENSIONS：： ：：DIP20 DIP20 DIP20 DIP20 symbol Millimeter Inch A 5.334 0.210 A1 0.381 b 1.524 0.060 b1 0.457 0.018 E 7.620 0.300 e 2.540 0.100 θ° 0 ° 7 ° 15 ° 0 ° 7 ° 15 °