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| www.fairchildsemi.com KA5P0680C Features * * * * * * * * * Adjustable switching frequency Intelligent Power Saving mode Pulse by pulse current limiting Over current Latch protection Over voltage protection Internal thermal shutdown function Built-in Soft Start function Internal high voltage sense FET Auto-restart mode Fairchild Power Switch(FPS) Description The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consist of high voltage power SenseFET and current mode PWM IC. Included PWM controller features integrated fixed oscillator, under voltage lock out, leading edge blanking, optimized gate turn-on/turn-off driver, thermal shut down protection, over voltage protection, and temperature compensated precision current sources for loop compensation and fault protection circuitry. compared to discrete MOSFET and controller or RCC switching converter solution, a Fairchild Power Switch(FPS) can reduce total component count, design size, and weight and at the same time increase efficiency, productivity, and system reliability.It has a basic platform well suited for cost effective design in PC SMPS with Power Saving function. TO-220-5L 1 1. Drain 2. GND 3. VCC 4. FB 5. CT Internal Block Diagram Vcc 3 UVLO Vref 15V/9V 2.5V OSC VCC VREF CLK S 5uA 900uA 2.5R R 0.5V VZ SOFT-START (5mS)/( 0 ~ 5V ) S 2V R Q 1mS VCC PS MODE 5uA LEB R Q VG BIAS GOOD LOGIC VG LIMIT CIRCUIT SenseFET Drain 1 Ct 5 Feedback 4 Vs Rsense 2 GND 0.4V/0.6V 0.7V OLP (Vfb=7V) OVP (Vcc=27V) AUTO RESTART OCL (Vs=1.1V) S R Q OUTPUT OFF TSD (Tj=170 ) POWER-ON RESET S R Q OUTPUT OFF Shutdown Latch Rev.1.0.2 (c)2001 Fairchild Semiconductor Corporation KA5P0680C Absolute Maximum Ratings (Ta=25C, unless otherwise specified) Parameter Maximum Drain voltage (1) Symbol VD,MAX VDGR VGS IDM EAS IAS ID ID VCC,MAX VFB PD Derating TA TSTG Value 800 800 30 24.0 455 27 6.0 4.0 30 -0.3 to 7V 150 1.21 -25 to +85 -55 to +150 Unit V V V ADC mJ A ADC ADC V V W W/C C C Drain-Gate voltage (RGS=1M) Gate-source (GND) voltage Drain current pulsed (2) Single pulsed avalanche energy (3) Avalanche current (4) Continuous drain current (TC=25C) Continuous drain current (TC=100C) Maximum Supply voltage Input voltage range Total power dissipation Operating ambient temperature Storage temperature Notes: 1. Tj=25C to 150C 2. Repetitive rating: Pulse width limited by maximum junction temperature 3. L=24mH, starting Tj=25C 4. L=13H, starting Tj=25C 2 KA5P0680C Electrical Characteristics (SFET part) (Ta=25C unless otherwise specified) Parameter Drain to PKG Breakdown voltage Drain-source breakdown voltage Symbol BVPKG BVDSS Condition 60Hz AC, Ta=25C VGS=0V, ID=50A VDS=Max., Rating, VGS=0V VDS=0.8Max., Rating, VGS=0V, TC=125C VGS=10V, ID=4.0A VDS=15V, ID=4.0A VGS=0V, VDS=25V, f=1MHz VDD=0.5BVDSS, ID=7.0A (MOSFET switching time are essentially independent of operating temperature) VGS=10V, ID=7.0A, VDS=0.5BVDSS (MOSFET switching time are essentially independent of operating temperature) Min. 3500 800 1.5 Typ. 1.6 2.5 1600 140 42 60 150 300 130 70 16 27 Max. 50 200 2.0 nC nS pF Unit V V A A S Zero gate voltage drain current Static drain-source on resistance (note) Forward transconductance Input capacitance Output capacitance Reverse transfer capacitance Turn on delay time Rise time Turn off delay time Fall time Total gate charge (gate-source+gate-drain) Gate-source charge Gate-drain (Miller) charge Note: Pulse test: Pulse width 300S, duty 2% 1 S = --R (note) IDSS RDS(ON) gfs Ciss Coss Crss td(on) tr td(off) tf Qg Qgs Qgd 3 KA5P0680C Electrical Characteristics (Control part) (Ta=25C unless otherwise specified) Parameter UVLO SECTION Start Threshold Voltage Min.Operating Voltage After Turn On OSCILLATOR SECTION Initial Frequency Temperature Stability Maximum Duty Cycle Offset Voltage FEEDBACK SECTION Feedback Source Current Shutdown Feedback Voltage Shutdown Delay Current Peak Current Limit PROTECTION SECTION Over Voltage Protection Thermal Shutdown Temp. POWER-SAVING MODE SECTION Power-saving Mode Feedback Volt. Power-saving Reset Feedback Volt. Power-saving Current Power-saving Mode Fb Current TOTAL DEVICE SECTION Start Up Current Operating Supply Current Istart IOP Vcc=14V Vcc 28V 0.1 10 0.2 18 mA mA VF(PS) VF(RE) IPS Ipfb VCC=16V VCC=16V VCC=16V VCC=16V 0.3 0.5 3 0.4 0.6 0.3 4 0.5 0.7 0.4 5 V V mA uA VOVP TSD Vcc 22V 25 150 27 170 29 V C IFB Vsd IDELAY IOVER Vsc = 0V Vfb 6V 4V Vfb Vsd Max. inductor current 0.9 6.3 4 3.52 1.1 6.9 5 4 1.3 7.5 6 4.48 mA V A (note 1) Symbol VSTART VSTOP FOSC FOSC DMAX Voffset Test Condition CT=2n -25C < Ta 85C RT=21k - Min. 14 8.4 61 0 85 0.5 Typ. 15 9 67 5 88 0.55 Max. 16 9.6 73 10 91 0.6 Unit V V KHz % % % CURRENT LIMIT (SELF-PROTECTION) SECTION Note: 1. These parameters, although guaranteed, are not 100% tested in production 4 KA5P0680C Typical Performance Characteristics v s tart Is tart 16.00 15.50 mA V 15.00 14.50 14.00 -25 0 25 50 75 100 125 150 0.15 0.12 0.09 0.06 0.03 -25 0 25 50 75 100 125 150 temp temp Figure 1. Start Threshhold Voltage v s top Figure 2. Stop Threshold Voltage V ov p 9.60 9.30 V 9.00 8.70 8.40 -25 0 25 50 75 100 125 150 V 29.00 28.00 27.00 26.00 25.00 -25 0 25 50 75 100 125 150 temp temp Figure 3. Start Up Current If b Figure 4. Over Voltage Protection Idelay 1.10 1.00 6.00 5.50 uA 5.00 4.50 4.00 -25 0 25 50 75 100 125 150 -25 0 25 50 75 100 125 150 mA 0.90 0.80 0.70 temp temp Figure 5. Feedback Source Current Figure 6. Shutdown Delay Current 5 KA5P0680C Typical Performance Characteristics (Continued) Vsd 7.50 7.20 A V 6.90 6.60 6.30 -25 0 25 50 75 100 125 150 temp 4.00 3.75 3.50 -25 0 25 4.50 4.25 Iover 50 75 100 125 150 temp Figure 7. Shutdown Feedback Voltage VF(RE) 0.70 0.65 V 0.60 0.55 0.50 -25 0 25 50 75 100 125 150 temp uA 6 5 4 3 2 -25 Figure 9. Peak Current Limit Ipfb 0 25 50 75 100 125 150 temp Figure 9. Power-Saving Reset Feedback Voltage Ips 400 300 uA 200 100 0 -25 0 25 50 75 100 125 150 temp V 0.50 0.45 0.40 0.35 0.30 Figure 10. Power-Saving Mode Feedback Current VF(PS) -25 0 25 50 75 100 125 150 temp Figure 11. Power-Saving Current Figure 12. Power-Saving Mode Feedback Voltage 6 KA5P0680C Typical Performance Characteristics (Continued) Fosc 73.00 70.00 Khz 67.00 64.00 61.00 -25 0 25 50 75 100 125 150 temp % 91.00 89.50 88.00 86.50 85.00 -25 0 25 Dmax 50 75 100 125 150 temp Figure 13. Operating Freguency Figure 14. Maximum Duty Cycle 7 KA5P0680C Package Dimensions TO-220-5L 8 KA5P0680C Package Dimensions (Continued) TO-220-5L(Forming) 9 KA5P0680C Ordering Information Product Number KA5P0680C-TU KA5P0680C-YDTU TU : Non Forming Type YDTU : Forming Type Package TO-220-5L TO-220-5L(Forming) Rating 800V, 6A Topr (C) -25C to +85C DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 10/17/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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