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| www.fairchildsemi.com KA2S1265 Fairchild Power Switch(SPS) Features * * * * * * * * * Wide operatimg frequency range up to (150kHz) Pulse by pulse over current limiting Over load protection Over voltage protecton (Min. 23V) Internal thermal shutdown function Under voltage lockout Internal high voltage sense FET External sync terminal Latch up Mode Description The SPS product family is specially designed for an offline SMPS with minimal external components. The SPS consist of high voltage power SenseFET and current mode PWM Controller IC. control IC features a trimmed oscillator, under voltage lock-out, leading edge blanking, optimized gate turnon/turn-off driver, thermal shut down protection, over voltage protection, temperature compensated precision current sources for loop compensation and fault protection circuit. Compared to discrete MOSFET and controller or RCC switching converter solution, a SPS can reduce total component count, design size, weight and at the same time increase & efficiency, productivity, and system reliability. It has a basic platform well suited for cost-effective Monitor power supply. TO-3P-5L 1 1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync Internal Block Diagram #3 VCC 32V 5V Vref - 5V + 6.4V #4 FB 2A 1mA 2.5R 1R 9V + 7.5V - + 25V - Thermal S/D OVER VOLTAGE S/D - + 0.1V S R Q #2 GND OSC S R L.E.B Q Good logic Internal bias #1 DRAIN SFET #5 Sync Power on reset Rev.1.0.1 (c)2001 Fairchild Semiconductor Corporation KA2S1265 Absolute Maximum Ratings Characteristic Maximum Drain voltage (1) Symbol VD,MAX VDGR VGS IDM (3) Value 650 650 30 48.0 785 12 8.4 30 -0.3 to VSD 269 2.17 -25 to +85 -55 to +150 Unit V V V ADC mJ 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 EAS ID ID VCC,MAX VFB PD Derating TA TSTG 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=10mH, VDD=50V, RG=27, starting Tj=25 C 2 KA2S1265 Electrical Characteristics (SFET part) (Ta = 25C unless otherwise specified) Characteristic Drain-source breakdown voltage Zero gate voltage drain current Static drain-source on resistance (note) Forward transconductance (note) 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 cycle < 2% 1 S = --R Symbol BVDSS IDSS RDS(ON) gfs Ciss Coss Crss td(on) tr td(off) tf Qg Qgs Qgd Test condition VGS=0V, ID=50A VDS=Max., Rating, VGS=0V VDS=0.8Max., Rating, VGS=0V, TC=125C VGS=10V, ID=6.0A VDS=50V, ID=6.0A VGS=0V, VDS=25V, f=1MHz VDD=0.5BVDSS, ID=12.0A (MOSFET switching time are essentially independent of operating temperature) VGS=10V, ID=12.0A, VDS=0.5BVDSS (MOSFET switching time are essentially independent of operating temperature) Min. 650 5.7 - Typ. 0.72 2700 300 61 18 37 88 36 20 69 Max. 50 200 140 - Unit V A mA W S pF nS nC 3 KA2S1265 Electrical Charcteristics (CONTROL part) (Ta = 25C unless otherwise specified) Characteristic Symbol Test condition After turn on Ta=25C -25CTa+85C Ta=25C, Vfb=GND Ta=25C, 5VVfbVSD VFB=2V Sync & S/S=GND Vfb=5V Ta=25C -25CTa+85C Max. inductor current VCC=14V Ta=25C ICC=20mA Min. 14 9 18 92 0.8 6.9 1.4 4.7 0.8 6.0 4.80 7.04 140 0.1 6 30 Typ. 15 10 20 5 95 1 7.5 1.8 5.0 6.4 5.00 0.3 8.00 160 0.3 12 32.5 Max. 16 11 22 10 98 1.2 8.1 2.2 5.3 6.8 5.20 0.6 8.96 0.55 18 35 Unit V V kHz % % mA V A V mA V V mV/C A C mA mA V UVLO SECTION Start threshold voltage VSTART Stop operating voltage VSTOP OSCILLATOR SECTION Initial accuracy FOSC (2) Frequency change with temperature F/T Maximum duty cycle Dmax FEEDBACK SECTION Feedback source current IFB Shutdown Feedback voltage VSD Shutdown delay current Idelay SYNC. & SOFT START SECTION Soft start voltage VSS Soft start current ISS VSYTH Sync threshold voltage(3) REFERENCE SECTION Vref Output voltage (1) Temperature Stability (1)(2) Vref/T CURRENT LIMIT (SELF-PROTECTION) SECTION Peak Current Limit IOVER PROTECTION SECTION TSD Thermal shutdown temperature (Tj) (1) TOTAL DEVICE SECTION Start Up current ISTART Operating supply current IOP (control part only) VCC zener voltage VZ NOTE: 1. These parameters, although guaranteed, are not 100% tested in production 2. These parameters, although guaranteed, are tested in EDS(water test) process 3.The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function. 4 KA2S1265 Typical Performance Characteristics (These characteristic graphs are normalized at Ta = 25C) Fig.1 Operating Frequency 1.2 1.15 1.1 1.05 Fosc 1 0.95 0.9 0.85 0.8 -25 0 25 50 75 100 125 150 1.2 1.15 1.1 1.05 Ifb IFB 1 0.95 0.9 0.85 0.8 -25 Fig.2 Feedback Source Current 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 1. Operating Frequency Figure 2. Feedback Source Current Fig.3 Operating Current 1.2 1.15 1.1 1.05 lIop 1 OP 0.95 0.9 0.85 0.8 -25 1.1 1.05 Fig.4 Max Inductor Current IIpeak 1 over 0.95 0.9 0.85 0 25 50 75 100 125 150 0.8 -25 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 3. Operating Supply Current Figure 4. Peak Current Limit 1.5 1.3 Fig.5 Start up Current 1.15 1.1 1.05 Fig.6 Start Threshold Voltage IST Istart 1.1 0.9 0.7 0.5 -25 Vth(H) 1 Vstart 0.95 0.9 0 25 50 75 100 125 150 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 5. Start up Current Figure 6. Start Threshold Voltage 5 KA2S1265 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta = 25C) Fig.7 Stop Threshold Voltage 1.15 1.1 1.05 1.15 1.1 1.05 Fig.8 Maximum Duty Cycle Vth(L) Vstop 1 0.95 0.9 0.85 -25 0 25 50 75 100 125 150 Dmax 1 0.95 0.9 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 7. Stop Threshold Voltage Figure 8. Maximum Duty Cycle Fig.9 Vcc Zener Voltage 1.2 1.15 1.1 1.05 Vz 1 0.95 0.9 0.85 0.8 -25 1.15 1.1 1.05 Fig.10 Shutdown Feedback Voltage Vsd 1 0.95 0.9 0 25 50 75 100 125 150 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 9. VCC Zener Voltage Figure 10. Shutdown Feedback Voltage Fig.11 Shutdown Delay Current 1.2 1.15 1.1 1.05 Idelay 1 0.95 0.9 0.85 0.8 -25 1.15 1.1 1.05 Fig.12 Over Voltage Protection Vovp 1 0.95 0.9 0 25 50 75 100 125 150 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Temperature [C] Figure 11. Shutdown Delay Current Figure 12. Over Voltage Protection 6 KA2S1265 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta = 25C) Fig.13 Soft Start Voltage 1.15 1.1 1.05 2.5 2 1.5 ( Rdson)1 Fig.14 Drain Source Turn-on Resistance Vss 1 0.9 0.95 0.85 -25 0.5 0 25 50 75 100 125 150 0 -25 0 25 50 75 100 125 150 Figure13. Soft Start Voltage Figure 14. Static Drain-Source on Resistance 7 KA2S1265 Package Dimensions TO-3P-5L 8 KA2S1265 Package Dimensions (Continued) TO-3P-5L (Forming) 9 KA2S1265 Ordering Information Product Number KA2S1265-TU KA2S1265-YDTU TU : Non Forming Type YDTU : Forming Type Package TO-3P-5L TO-3P-5L(Forming) Rating 650V,12A Operating Temperature -25C to +85C 10 KA2S1265 11 KA2S1265 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 2/5/01 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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