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VIPER26LDTR Datasheet(PDF) 7 Page - STMicroelectronics |
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VIPER26LDTR Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 25 page  VIPER26 Electrical data Doc ID 17736 Rev 2 7/25 Table 8. Controller section Symbol Parameter Test condition Min Typ Max Unit Error amplifier VREF_FB FB reference voltage 3.2 3.3 3.4 V IFB_PULL UP Current pull up -1 µA GM Trans conductance 2 mA/V Current setting (LIM) pin VLIM_LOW Low level clamp voltage ILIM = -100 µA0.5 V Compensation (COMP) pin VCOMPH Upper saturation limit TJ = 25 °C 3 V VCOMPL Burst mode threshold TJ = 25 °C 1 1.1 1.2 V VCOMPL_HYS Burst mode hysteresis TJ = 25 °C 40 mV HCOMP ∆VCOMP / ∆IDRAIN 3V/A RCOMP(DYN) Dynamic resistance VFB = GND 15 k Ω ICOMP Source / sink current VFB > 100 mV 150 µA Max source current VCOMP = GND, VFB = GND 220 µA Current limitation IDlim Drain current limitation ILIM = -10 µA, VCOMP = 3.3 V, TJ = 25 °C 0.66 0.7 0.74 A tSS Soft-start time 8.5 ms TON_MIN Minimum turn ON time 480 ns IDlim_bm Burst mode current limitation VCOMP = VCOMPL 145 mA Overload tOVL Overload time 50 ms tRESTART Restart time after fault 1 s Oscillator section FOSC Switching frequency VIPER26L 54 60 66 kHz VIPER26H 103 115 127 kHz FD Modulation depth FOSC = 60 kHz ±4 kHz FOSC = 115 kHz ±8 kHz FM Modulation frequency 230 Hz DMAX Maximum duty cycle 70 80 % Thermal shutdown TSD Thermal shutdown temperature 150 160 °C THYST Thermal shutdown hysteresis 30 °C |
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