KA3502 Fairchild Semiconductor, KA3502 Datasheet
KA3502
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KA3502 Summary of contents
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... REM ©2000 Fairchild Semiconductor International Descriptions The KA3502 is complete housekeeping circuitry for use in the secondary side of SMPS(Switched Mode Power Supply). It contains various functions, which are two Precision Volt- age References, Over Voltage/Current Protection, Remote On/Off Control, Power Good Signal Generator, Disable Logic and etc ...
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... KA3502 Pin Assignments NO NAME FUNCTION 1 V33 +3.3 V OUTPUT VOLTAGE OUTPUT VOLTAGE 3 V12 +12 V OUTPUT VOLTAGE 4 Adj ADJUSTABLE OVP INPUT 5 VCC SUPPLY VOLTAGE 6 PWM REMOTE ON/OFF OUTPUT 7 REM REMOTE ON/OFF INPUT 8 Trem REMOTE ON/OFF DELAY 9 PG POWER GOOD OUTPUT 10 Topr PG DELAY ...
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... Typ.), PWM becomes "High" after some delay and the main SMPS is turned-off. 19 IS5 Current Sense Input for +5 V. The OCP Offset voltage for + IS33 Current Sense Input for +3.3 V. The OCP Offset voltage for +3 135 mV Pin Function Descrition 20mV Typ. 1.6%. 1.6%. KA3502 3 ...
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... KA3502 Absolute Maximum Ratings Parameter Supply Voltage UV Input Voltage Input Maximum Voltage Cathode Current for FB1, 2 PWM Maximum Current PG Output Maximum Current Power Dissipation Operating Temperature Range Storage Temperature Range Temperature Characteristics Parameter Temperature Stability for Vref1 Symbol ...
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... REM: “L” “H”, C=0.1 uF Toff REM: “L” “H”, C=0.1 uF Vsat Io=0.5 mA (PWM) Ileak Pin 6 (PWM)=20 V Vref1 IIk1=1 mA Vref1 (line) 15 V<Vcc<20 V Vref1 Ik1 Isink1 - Rint - Rrate - Vref1 Ta (Note 1) GBW1 GV=1 (Note 1) KA3502 Min. Typ. Max. Unit 3.8 4.0 4.2 V 5.8 6.1 6.4 V 13.4 14.2 15.0 V 1.22 1.26 1.30 V 125.5 135 144 ...
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... KA3502 Electrical Characteristics (Continued) Parameter REFERENCE 2 SECTION Reference Input Voltage 2 Line Regulation 2 Current Stability 2 Output Sinking Current Capability 2 Temperature Stability 2 Gain Bandwidth 2 POWER GOOD SECTION Detecting UV Voltage Detecting V5 Voltage Hysteresis Voltage 1 Hysteresis Voltage 2 High Threshold Voltage of Comp 9 Noise margin of Vtopr Charging Current for PG Delay ...
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... Figure 3. Bandgap Voltage (Vadj 3.50 3.75 4.00 V33 (V) Figure 3. Over Voltage Protection for +3.3V 2.53 2.52 2.51 2.50 2. 100 0 Figure 2. Vref1,2 Current Stability 100 1.10 Figure 4. OVP Input Threshold Voltage for Adj 4.25 4.50 5.0 Figure 4. OCP Offiset Voltage for 3. (mA) 1.15 1.20 1.25 1.30 1.35 Vadj (V) 5.5 6.0 6.5 7.0 V5 (V) KA3502 7 ...
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... KA3502 Typical Characteristics (Continued V12 (V) Figure 7. Over Voltage Protection for +12V Vos5 (mV) Figure 9. OCP Offiset Voltage for 0.0 0.5 1.0 Vth (V) Figure 11. Remotr On/Off Input Threshold 110 120 Figure 8. OCP Offiset Voltage for 3.3V ...
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... V5 (V) Figure 15. Detecting V5 Voltage for PG 0.4 0.3 0.2 0.1 0 Isink (mA) Figure 17. PG Saturating Voltage 1.20 Figure 14. Detecting UV Voltage 4.4 4.2 4.0 0.5 Figure 16. High/low Threshold Voltage of Comp9 0.4 0.3 0.2 0.1 0 Figure 18. Disable Saturation Voltage 1.22 1.24 1.26 1.28 1.30 Vuv (V) 1.0 1.5 2.0 2.5 V10 ( Isink (mA) KA3502 9 ...
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... KA3502 Typical Characteristics (Continued Vcc (V) Figure 19. Supply Current of Vcc 0.0 0.2 0.4 Time (sec) Figure 21. PG Delay Figure 20. PG 0.6 0.8 1.0 PWM REM 100 Time (msec) ...
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... Mechanical Dimensions Package Dimensions in millimeters 20-DIP KA3502 11 ...
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... KA3502 Ordering Information Product Number Package KA3502 20-DIP 12 Operating Temperature ...
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... KA3502 13 ...
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... KA3502 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. ...