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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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VIPER318HDTR Arkusz danych(PDF) 8 Page - STMicroelectronics |
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VIPER318HDTR Arkusz danych(HTML) 8 Page - STMicroelectronics |
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8 / 40 page  Symbol Parameter Test condition Min. Typ. Max. Unit tOVL Overload delay time 45 50 55 ms tOVL_max Max. overload delay time When in pulse skipping 100 ms tSS Soft-start time 5 8 11 ms tON_MIN Minimum turn-on time VCC=9 V, VCOMP=1 V, VFB=VFB_REF 250 300 350 ns tRESTART Restart time after fault 0.625 1 1.375 s UVP VUVP_th UVP threshold VCC =9 V, VCOMP=1 V, VFB=VFB_REF 0.38 0.4 0.42 V IUVP_pull- up UVP pull-up current -1 µA tUVP_DEB Debounce time before UVP tripping 18.75 30 41.25 ms tUVP_REST Debounce time for restoring normal operation from UVP 18.75 30 41.25 ms Iq_DIS Quiescient current during UVP Not switching, VFB>VFB_REF 0.25 0.35 mA OVP VOVP_th Overvoltage protection threshold VCC=9 V, VCOMP=1 V, VFB=VFB_REF 3.85 4 4.15 V tOVP_DEB Debounce time before OVP tripping 156 250 344 µs tOVP_REST Restart time after overvoltage protection tripping 312 500 688 ms Oscillator FOSC Switching frequency TJ =25ºC VIPER31*X 27 30 33 kHz TJ = 25ºC, VIPER31*L 54 60 66 TJ = 25ºC, VIPER31*H 119 132 145 FOSC MIN Min. switching frequency TJ= 25ºC (3) 13.5 15 16.5 kHz FD Modulation depth (4) ±7·FOSC % FM Modulation frequency (4) 200 Hz DMAX Max. duty cycle (4) 70 80 % Thermal shutdown protection TSD Thermal shutdown temperature threshold (4) 150 160 °C 1. Measured at Vin = 100 Vdc in Flyback topology, with 1.5 mH transformer primary inductance 2. See Section 4.10 Pulse frequency modulation 3. See Section 4.7 Pulse skipping 4. Parameter assured by design and characterization. VIPER31 Electrical characteristics DS13285 - Rev 3 page 8/40 |
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