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VIPER25LDTR 数据表(PDF) 8 Page - STMicroelectronics |
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VIPER25LDTR 数据表(HTML) 8 Page - STMicroelectronics |
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8 / 40 page ![]() Electrical data VIPER25 8/40 Doc ID 15585 Rev 4 Table 8. Controller section Symbol Parameter Test condition Min. Typ. Max. Unit Feedback pin VFBolp Over load shutdown threshold 4.5 4.8 5.2 V VFBlin Linear dynamics upper limit 3.2 3.3 3.4 V VFBbm Burst mode threshold Voltage falling 0.6 V VFBbmhys Burst mode hysteresis Voltage rising 100 mV IFB Feedback sourced current VFB = 0.3 V -150 -200 -280 uA 3.3 V < VFB < 4.8 V -3 uA RFB(DYN) Dynamic resistance VFB < 3.3 V 14 19 k Ω HFB ΔV FB / ΔID 26 V/A ZCD pin VZCDCLh Upper clamp voltage IZCD = 1 mA 5 5.5 6 V VZCDAth Arming voltage threshold Positive-going edge 0.8 V VZCDTth Triggering voltage threshold Negative-going edge 0.6 V IZCD Internal pull-up -10 µA TBLANK Turn-on inhibit time after MOSFET’s turn-off VZCD < 1 V 6.3 µs VZCD >1 V 2.5 µs Current limitation IDlim Max drain current limitation VFB = 4 V, IZCD = -10 µA TJ = 25 °C 0.66 0.7 0.74 A tSS Soft start time VIPER25L 3.5 ms VIPER25H 4.2 ms tSU Start up time VIPER25L 7.5 15 ms VIPER25H 9.5 18 ms TON_MIN Minimum turn ON time 220 400 480 ns td Propagation delay 100 ns tLEB Leading edge blanking 300 ns ID_BM Peak drain current during burst mode VFB = 0.6 V 160 mA Overcurrent protection (2nd OCP) IDMAX Second overcurrent threshold 1.2 A Overvoltage protection VOVP Overvoltage protection threshold 3.8 4.2 4.6 V TSTROBE Overvoltage protection strobe time 2.2 μs |
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