ka3511bs Fairchild Semiconductor, ka3511bs Datasheet
ka3511bs
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ka3511bs Summary of contents
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... SMPS. ©2001 Fairchild Semiconductor Corporation www.fairchildsemi.com Description The KA3511BS is a fixed frequency improved performance pulse width modulation control circuit with complete housekeeping circuitry for use in the secondary side of SMPS (Switched mode power supply). It contains various functions, which are precision voltage reference, over voltage protection, under voltage protection, remote on/off control, power good signal generator and etc ...
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... BIAS 14 VREF VREF Start DET 9 Absolute Maximum Ratings Parameter Supply voltage Collector output voltage Collector output current Power dissipation(KA3511BS) Operating temperature Storage temperature Temperature Characteristics Parameter Temperature coefficient of Vref (- PWM CONTROL CK Q DEAD TIME R CONTROLLER ...
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... Pin Definition : KA3511BS #24 #1 Vcc COMP E/A(-) Pin Pin I/O Number Name Supply voltage CC 2 COMP O E/A output 3 E/A(-) I E/A (-) input 4 E/A(+) I E/A (+) input 5 TREM - Remote on/off delay 6 REM I Remote on/off input Oscillation freq. setting Oscillation freq. setting C 9 DET I Detect input ...
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... KA3511BS Pin Number Pin Name Supply voltage. Operating range is 10V~30V. V Error amplifier output connected to non-inverting input of pulse width modulator 2 COMP comparator. 3 E/A(-) Error amplifier inverting input. Its reference voltage is always 1.25V. Error amplifier non-inverting input feedback voltage.This pin may be used to sense ...
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... COMP G 0.5V V 3.5V VO COMP =0.7V SINK COMP I V =3.5V SOURCE COMP V Zero Duty Cycle TH(PWM =200mA CE(SAT =30V, V =0V C(off OVP1 KA3511BS Min. Typ. Max. Unit 4 kHz - -2.0 - 3.0 3.3 ...
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... KA3511BS Electrical Characteristics (continued) Parameter Over voltage protection for 5V Over voltage protection for 12V Input threshold voltage for PT Under voltage protection for 3.3V Under voltage protection for 5V Under voltage protection for 12V Charging current for UVP delay UVP Delay Time REMOTE ON/OFF SECTION ...
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... Application Informations 300K 100K 10K 1K 100 30 Figure 1. Oscillator Frequency vs. Timing Resistance Feedback Dead-time control Output Q1 Output Q2 CT=0.01 F 0 10K 20K 50K 100K R . TIMING RESISTANCE Figure 2. Operating Waveform VCC=15V 0.001 F 200K 500K 1M KA3511BS 7 ...
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... KA3511BS Housekeeping Circuit Standby Supply V 12V 5V 11k 33k 1.8k + 0.1uF 1k 12k + 0.01u F + 2.2uF Note : The KA3511BS requires few external components to accomplish a complete housekeeping circuits for SMPS (1W 2k (1W 1 VCC =20V CC 15k 2 COMP 0.01u F 3 E/A(-) 4 E/A(+) REM ...
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... PIN19(Dead Time Control Voltage)-Duty Cycle 5.0 5.5 6.0 V5 [V] Figure 7. OVP for 5V 5.010 5.008 5.006 5.004 5.002 -40 - Figure 12. 3.6 2.0 2.5 2.73 3.0 Figure 6.5 7.0 14.0 Figure 8. KA3511BS 100 120 140 TEMP [ C] Bandgap Reference Voltage 3.8 4.0 4.2 4.4 4.6 V3.3 [V] OVP for 3.3V 14.2 14.4 14.6 14.8 15.0 V12 [V] OVP for 12V 9 ...
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... KA3511BS Typical Characteristics 1.15 1.20 1.25 Vpt [V] Figure 9. OVP for 3.6 3.8 4.0 4.2 Pin 14 (V5) Voltage [V] Figure 11 . UVP for 5V -0.000016 -0.000018 -0.000020 -0.000022 -0.000024 0 50 100 Figure 13 . Remote ON Charging Current 10 (Continued 1.30 1.35 Figure 10. UVP for 3. 9.0 4.4 4.6 4.8 5 ...
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... Figure 19. Short Circuit Current (Continued Figure 16. Detecting V -0.000005 -0.000010 -0.000015 -0.000020 4.8 5.0 Figure 18. Charging Current for 300 400 Figure 20. Hysteresis Voltage 2 1.0 1.1 1.2 1.3 1.4 1.5 Pin 9 (DET) Voltage [V] Voltage (DET 100 120 140 160 0.0 0.5 1.0 1.5 2.0 2.5 Pin Voltage [V] PG KA3511BS 11 ...
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... KA3511BS Typical Characteristics 0.002 0.00 -0.002 -0.004 -0.006 -0.008 Figure 21. Error Amp Sink Current 12 (Continued 100 120 140 Figure 22. Reference Voltage Supply Voltage [V] ...
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... Experimental Result Figure 23. Rising Time of +5Vdc Output Voltage Figure 24. PG Signal Delay Time KA3511BS CH1 : PS-ON CH2 : +5Vdc Output CH3 : PG Signal CH1 : PS-ON CH2 : +5Vdc Output CH3 : PG Signal 13 ...
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... KA3511BS 14 Figure 25. Power Down Warning Figure 26. No Load Protection CH1 : PS-ON CH2 : +5Vdc Output CH3 : PG Signal CH1 : +3.3Vdc Output CH2 : +5Vdc Output CH3 : +12Vdc Output ...
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... Figure 27. Vcc, +5Vdc Output vs. PG Signal (High) Figure 28. Vcc, +5Vdc Output vs. PG Signal (Low) KA3511BS CH1 : Vcc CH2 : +5Vdc Output CH3 : PG Signal CH1 : Vcc CH2 : +5Vdc Output CH3 : PG Signal 15 ...
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... TREM GND 0.1uF REM TUVP 2.2uF V12 103 DET TPG V3.3 2.2uF Vref AR3511X B S KA3511BS D19 D9 C16 100K VR1 + VCC 56K + 22uF 12V OUT 5V OUT 3.3V OUT CT ...
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... Mechanical Dimensions Package Dimensions in millimeters 24-SDIP KA3511BS 17 ...
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... KA3511BS Ordering Information Product Number Package KA3511BS 24-SDIP 18 Operating Temperature ...
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... KA3511BS 19 ...
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... KA3511BS 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. ...