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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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VIPER25LD 数据表(PDF) 9 Page - STMicroelectronics |
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VIPER25LD 数据表(HTML) 9 Page - STMicroelectronics |
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9 / 40 page  VIPER25 Electrical data Doc ID 15585 Rev 4 9/40 Oscillator section FOSClim Internal frequency limit VIPER25L 122 136 150 kHz Internal frequency limit VIPER25H 200 225 250 kHz FSTARTER Starter frequency VFB=1 V, VZCD<VZCDT th t<tSU 1/4 FOSClim kHz VFB=1 V, VZCD<VZCDT th t>tSU 1/8 FOSClim kHz FOSCmin VFB = 1 V, VZCD > VZCDA_th 1/64 FOSClim kHz Brown-out protection VBRth Brown-out threshold Voltage falling 0.41 0.45 0.49 V VBRhyst Voltage hysteresis above VBRth Violate rising 50 mV IBRhyst Current hysteresis 7 12 μA VBRclamp Clamp voltage IBR = 250 µA 3 V VDIS Brown-out disable voltage 50 150 mV Thermal shutdown TSD Thermal shutdown temperature 150 160 °C THYST Thermal shutdown hysteresis 30 °C Table 8. Controller section (continued) Symbol Parameter Test condition Min. Typ. Max. Unit |
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