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LT1640AL Datasheet(PDF) 27 Page - Linear Technology |
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LT1640AL Datasheet(HTML) 27 Page - Linear Technology |
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27 / 34 page  LTC4253/LTC4253A 27 425353afe APPLICATIONS INFORMATION VACL VCB VIN – VGATEH OV TIMER GATE SENSE SS 12 34 5 6 7 8 9 GATE START-UP 4253 F11 OV DROPS BELOW VOVLO (VOV – VOVHST FOR THE LTC4253A), CHECK GATE < VGATEL, SENSE < VCB OS OV OVERSHOOTS VOVHI (VOV FOR THE LTC4253A). GATE AND SS ARE PULLED DOWN, PWRGD SIGNALS AND TIMER ARE UNAFFECTED VOVHI VOVLO VTMRH VGATEL ACL + VOS) CB + VOS) OS 5μA 50μA 50μA 5μA DRN CB FAULT CB FAULT CB FAULT CB FAULT 12 1 2 1 2 3 4 TIMER GATE SENSE VOUT SS DRAIN PWRGD1 TIMER GATE SENSE VOUT SS DRAIN PWRGD1 TIMER GATE SENSE VOUT SS DRAIN PWRGD1 4253 F12 CB TIMES-OUT CB TIMES-OUT VTMRH VACL VCB VACL VCB 5μA 5μA VDRNCL DRN DRN VTMRH VACL VCB VDRNCL DRN VTMRH Figure 11. Overvoltage Timing (All Waveforms Are Referenced to VEE) Figure 12. Circuit Breaker Timing Behavior (All Waveforms Are Referenced to VEE) (12a) Momentary Circuit Breaker Fault (12b) Circuit Breaker Time-Out (12c) Multiple Circuit Breaker Fault |
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