www.fairchildsemi.com KA2S1265 Fairchild Power Switch(SPS) Features 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. 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 TO-3P-5L 1 1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync Internal Block Diagram #3 VCC 32V 5V Vref Internal bias Good logic − #5 Sync OSC + 5V S 6.4V R − #4 FB 2µA 1mA 2.5R 1R 9V L.E.B 0.1V − + 25V − Q + + 7.5V #1 DRAIN SFET S Thermal S/D R #2 GND Q Power on reset OVER VOLTAGE S/D Rev.1.0.1 ©2001 Fairchild Semiconductor Corporation KA2S1265 Absolute Maximum Ratings Characteristic Symbol Value Unit VD,MAX 650 V VDGR 650 V VGS ±30 V IDM 48.0 ADC EAS 785 mJ Continuous drain current (TC=25°C) ID 12 ADC Continuous drain current (TC=100°C) ID 8.4 ADC VCC,MAX 30 V VFB −0.3 to VSD V PD 269 W Derating 2.17 W/°C TA −25 to +85 °C TSTG −55 to +150 °C Maximum Drain voltage (1) Drain-Gate voltage (RGS=1MΩ) Gate-source (GND) voltage Drain current pulsed (2) Single pulsed avalanche energy Maximum Supply voltage Input voltage range Total power dissipation Operating ambient temperature Storage temperature (3) Notes: 1.Tj=25°C to 150°C 2.Repetitive rating: Pulse width limited by maximum junction temperature 3.L=10mH, VDD=50V, RG=27Ω, starting Tj=25 °C 2 KA2S1265 Electrical Characteristics (SFET part) (Ta = 25°C unless otherwise specified) Characteristic Drain-source breakdown voltage Symbol BVDSS 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 IDSS RDS(ON) gfs Ciss Coss Crss td(on) tr td(off) Fall time tf Total gate charge (gate-source+gate-drain) Gate-source charge Qgs Gate-drain (Miller) charge Qgd Qg Test condition VGS=0V, ID=50µA VDS=Max., Rating, VGS=0V VDS=0.8Max., Rating, VGS=0V, TC=125°C 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. Typ. Max. Unit 650 - - V - - 50 µA - - 200 mA 5.7 - 0.72 2700 300 61 18 37 88 - W S - 36 - - - 140 - 20 - - 69 - pF nS nC Note: Pulse test: Pulse width < 300µS, duty cycle < 2% 1S = --R 3 KA2S1265 Electrical Charcteristics (CONTROL part) (Ta = 25°C unless otherwise specified) Characteristic Symbol 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 Test condition Min. Typ. Max. Unit After turn on 14 9 15 10 16 11 V V Ta=25°C −25°C≤Ta≤+85°C - 18 92 20 ±5 95 22 ±10 98 kHz % % Ta=25°C, Vfb=GND Ta=25°C, 5V≤Vfb≤VSD 0.8 6.9 1.4 1 7.5 1.8 1.2 8.1 2.2 mA V µA VFB=2V Sync & S/S=GND Vfb=5V 4.7 0.8 6.0 5.0 6.4 5.3 6.8 V mA V Ta=25°C −25°C≤Ta≤+85°C 4.80 - 5.00 0.3 5.20 0.6 V mV/°C Max. inductor current 7.04 8.00 8.96 A 140 160 - °C VCC=14V 0.1 0.3 0.55 mA Ta=25°C 6 12 18 mA ICC=20mA 30 32.5 35 V - 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 = 25°C) Fig.2 Feedback Source Current 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 1 IFB 0.95 0.9 0.85 0.8 -25 0 25 Temperature [°C] Figure 1. Operating Frequency Fig.3 Operating Current 1.2 1.15 1.1 1.05 lIop OP 1 0.95 0.9 0.85 0.8 -25 100 125 150 Fig.4 Max Inductor Current 1.1 1.05 Iover Ipeak 1 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] Figure 3. Operating Supply Current Figure 4. Peak Current Limit Fig.5 Start up Current Fig.6 Start Threshold Voltage 1.15 1.1 1.3 1.05 1.1 IIstart ST V th(H) 1 Vstart 0.9 0.95 0.7 0.5 -25 75 Figure 2. Feedback Source Current Temperature [°C] 1.5 50 Temperature [°C] 0.9 0 25 50 75 100 125 150 Temperature [°C] Figure 5. Start up Current 0.85 -25 0 25 50 75 100 125 150 Temperature [°C] Figure 6. Start Threshold Voltage 5 KA2S1265 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta = 25°C) Fig.7 Stop Threshold Voltage 1.15 Fig.8 Maximum Duty Cycle 1.15 1.1 1.1 1.05 1.05 Vth(L) 1 Vstop Dmax 1 0.95 0.95 0.9 0.9 0.85 -25 0 25 50 75 100 125 150 0.85 -25 0 Temperature [°C] Figure 7. Stop Threshold Voltage 50 75 100 125 150 Figure 8. Maximum Duty Cycle Fig.10 Shutdown Feedback Voltage Fig.9 Vcc Zener Voltage 1.15 1.2 1.15 1.1 1.05 Vz 1 0.95 0.9 0.85 0.8 -25 1.1 1.05 Vsd 1 0.95 0.9 0 25 50 75 100 125 150 0.85 -25 0 Temperature [°C] 50 75 100 125 150 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 25 Temperature [°C] Figure 9. VCC Zener Voltage Fig.12 Over Voltage Protection 1.15 1.1 1.05 Vovp 1 0.95 0.9 0 25 50 75 100 125 150 Temperature [°C] Figure 11. Shutdown Delay Current 6 25 Temperature [°C] 0.85 -25 0 25 50 75 100 125 150 Temperature [°C] Figure 12. Over Voltage Protection KA2S1265 Typical Performance Characteristics (Continued) (These characteristic graphs are normalized at Ta = 25°C) Fig.13 Soft Start Voltage Fig.14 Drain Source Turn-on Resistance 1.15 2.5 1.1 2 1.05 1 1.5 0.95 ( )1 Rdson 0.9 0.5 Vss 0.85 -25 0 25 50 75 100 125 Figure13. Soft Start Voltage 150 0 -25 0 25 50 75 100 125 150 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 10 Package TO-3P-5L TO-3P-5L(Forming) Rating Operating Temperature 650V,12A -25°C to +85°C 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. 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. www.fairchildsemi.com 2/5/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation