KA2S0680B S P S S P S TO -3P -5L The SPS product family is specially designed for an off-line SMPS with minimal external components. The SPS 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/turnoff 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 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 design in monitor power supply. 1.DRAIN 2. GND 3. VCC 4. FB 5. Sync ORDERING INFORMATION FEATURES * Wide operating frequency range up to 150kHz * Pulse by pulse over current limiting * Over current protection * Over voltage protection (Min. 23V) * Internal thermal shutdown function * Under voltage lockout * Internal high voltage sense FET * External sync terminal * Latch up Mode Device Package Rating Topr (C) KA2S0680B TO-3P-5L 800V, 6A -25C to +85C BLOCK DIAGRAM #3 VCC 32V 5V Vref Internal bias Good logic - #5 Sync OSC + 5V S 6.4V R - #4 FB 2A 1mA 2.5R 1R 9V 0.1V - + 25V - Q L.E.B + + 7.5V #1 DRAIN SFET S Thermal S/D R Q Power on reset OVER VOLTAGE S/D #2 GND KA2S0680B S P S ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Value Unit Drain-source (GND) voltage (1) VDSS 800 V Drain-Gate voltage (RGS=1M) VDGR 800 V Gate-source (GND) voltage VGS 30 V IDM 24.0 ADC EAS 455 mJ Avalanche current IAS 20 A Continuous drain current (TC=25C) ID 6.0 ADC Continuous drain current (TC=100C) ID 4.0 ADC Supply voltage VCC 30 V Analog input voltage range VFB -0.3 to VSD V Total power dissipation PD (watt H/S) 150 W Derating 1.21 W/C Drain current pulsed (2) Single pulsed avalanche energy (3) (4) Operating temperature TOPR -25 to +85 C Storage temperature TSTG -55 to +150 C NOTES: 1. Tj=25C to 150C 2. Repetitive rating: Pulse width limited by maximum junction temperature 3. L=24mH, starting Tj=25C 4. L=13uH, starting Tj=25C KA2S0680B S P S ELECTRICAL CHARACTERISTICS (SFET part) (Ta=25C unless otherwise specified) Characteristic Symbol Test condition Min. Typ. Max. Unit 800 - - V Drain-source breakdown voltage BVDSS VGS=0V, ID=50A Zero gate voltage drain current IDSS VDS=Max., Rating, VGS=0V - - 50 A VDS=0.8Max., Rating, VGS=0V, TC=125C - - 200 A Static drain-source on resistance (note) RDS(ON) VGS=10V, ID=4.0A - 1.6 2.0 Forward transconductance (note) gfs VDS=15V, ID=4.0A 1.5 2.5 - mho Input capacitance Ciss - 1600 - pF Output capacitance Coss VGS=0V, VDS=25V, f=1MHz - 140 - Reverse transfer capacitance Crss - 42 - Turn on delay time td(on) - 60 - Rise time tr - 150 - Turn off delay time td(off) - 300 - Fall time tf - 130 - Total gate charge (gate-source+gate-drain) Qg - 70 - Gate-source charge Qgs - 16 - Gate-drain (Miller) charge Qgd - 27 - NOTE: Pulse test: Pulse width 300S, duty cycle 2% VDD=0.5BVDSS, ID=6.0A (MOSFET switching time are essentially independent of operating temperature) VGS=10V, ID=6.0A, VDS=0.5BVDSS (MOSFET switching time are essentially independent of operating temperature) nS nC KA2S0680B S P S ELECTRICAL CHARACTERISTICS (Control part) (Ta=25C unless otherwise specified) Characteristic Symbol Test condition Min. Typ. Max. Unit 4.80 5.00 5.20 V REFERENCE SECTION Output voltage (1) Vref Ta=25C Temperature Stability (1)(2) Vref/T -25CTa+85C - 0.3 0.6 mV/C FOSC Ta=25C 18 20 22 kHz F/T -25CTa+85C - 5 10 % VSYTH Vfb=5V 6.0 6.4 6.8 V 92 95 98 % OSCILLATOR SECTION Initial accuracy Frequency change with temperature (2) Sync threshold voltage (3) PWM SECTION Maximum duty cycle - Dmax FEEDBACK SECTION Feedback source current IFB Ta=25C, Vfb=GND 0.7 0.9 1.1 mA Shutdown delay current Idelay Ta=25C, 5VVfbVSD 1.4 1.8 2.2 A Max. inductor current 3.52 4.00 4.48 A 14 15 16 V 9 10 11 V OVER CURRENT PROTECTION SECTION IL(max) Over current protection UVLO SECTION - Start threshold voltage Vth(H) Minimum operating voltage Vth(L) After turn on Start current IST VCC=14V 0.1 0.3 0.55 mA Operating supply current (control part only) IOPR Ta=25C 6 12 18 mA VCC zener voltage VZ ICC=20mA 30 32.5 35 V TOTAL STANDBY CURRENT SECTION SHUTDOWN SECTION Shutdown Feedback voltage Thermal shutdown temperature (Tj) Over voltage protection voltage (1) VSD - 6.9 7.5 8.1 V TSD - 140 160 - C VOVP - 23 25 28 V SOFT START SECTION Soft start current ISS Sync & S/S=GND 0.8 1.0 1.2 mA Soft start voltage VSS VFB=2V 4.7 5.0 5.3 V NOTES: 1. These parameters, although guaranteed, are not 100% tested in production 2. These parameters, although guaranteed, are tested in EDS (wafer test) process 3. The amplitude of the sync. pulse is recommended to be between 2V and 3V for stable sync. function. KA2S0680B S P S TYPICAL PERFORMANCE CHARACTERISTICS (These characteristic graphs are normalized at Ta=25C) 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 1.2 1.15 1.1 1.05 Ifb 1 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 Iop 1 0.95 0.9 0.85 0.8 -25 100 125 150 1.1 Fig.4 Max Inductor Current 1.05 Ipeak 1 0.95 0.9 0.85 0 25 50 75 100 125 150 Figure 3. Operating Current 0.8 -25 0 25 50 75 100 125 150 Temperature [C] Figure 4. Max. Inductor Current Fig.5 Start up Current Fig.6 Start Threshold Voltage 1.15 1.1 1.3 1.05 1.1 Istart Vstart 1 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 KA2S0680B S P S TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (These characteristic graphs are normalized at Ta=25C) Fig.7 Stop Threshold Voltage Fig.8 Maximum Duty Cycle 1.15 1.15 1.1 1.1 1.05 1.05 Vstop 1 Dmax 1 0.95 0.95 0.9 0.9 0.85 -25 0.85 0 25 50 75 100 125 150 -25 0 Temperature [C] 25 50 75 100 125 150 Temperature [C] Figure 7. Stop Threshold Voltage 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] Figure 9. VCC Zener Voltage 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] 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 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Figure 12. Over Voltage Protection KA2S0680B S P S TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (These characteristic grahps are normalized at Ta=25C) Fig.13 Soft Start Voltage Fig.14 Drain Source Turn-on Resistance 1.15 2.5 1.1 1.05 2 Vss 1 1.5 0.95 Rdson 1 0.9 0.5 0.85 -25 0 25 50 75 100 125 150 Temperature [C] Figure 13. Soft Start Voltage 0 -25 0 25 50 75 100 125 150 Temperature [C] Figure 14. Drain Source Turn-on Resistance KA2S0680B 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 12/28/99 0.0m 001 Stock#DSxxxxxxxx 1999 Fairchild Semiconductor Corporation