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LT4250L Datasheet(PDF) 6 Page - Linear Technology |
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LT4250L Datasheet(HTML) 6 Page - Linear Technology |
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6 / 12 page  6 LT4250L/LT4250H 4250lhf PWRGD/PWRGD VDD V + 5V OV VDRAIN 48V R 5k DRAIN LT4250L/LT4250H UV GATE VEE SENSE VSENSE 1640 F01a VUV VOV + – Figure 1a. Test Circuit 1 2V 1V 4250 F02 tPHLOV 1.255V 0V OV GATE 1V 1.235V tPLHOV TIMING DIAGRAMS Figure 2. OV to GATE Timing 2V 1V 4250 F03 tPHLUV 1.125V 0V UV GATE 1V 1.255V tPLHUV Figure 3. UV to GATE Timing Figure 4a. SENSE to GATE Timing 1V 4250 F04a tPHLSENSE 60mV SENSE GATE 100mV VEE Figure 5a. DRAIN to PWRGD/PWRGD Timing Figure 4b. Active Current Limit Timeout 1V 4250 F04b tPHLCB UV GATE 1V PWRGD/PWRGD VDD OV 48V 20V DRAIN LT4250L/LT4250H UV GATE VEE SENSE 4250 F01b VUV 0.1 µF + – + – 10k 10 Ω 10 Ω IRF530 Figure 1b. Test Circuit 2 Figure 5b. GATE to PWRGD/PWRGD Timing 4250 F05b VPWRGD – VDRAIN = 0 GATE PWRGD 1V 1.4V 1.4V VEE GATE PWRGD 1V tPHLGH tPHLGH ∆VGATE – VGATE = 0 ∆VGATE – VGATE = 0 4250 F05a VPWRGD – VDRAIN = 0V DRAIN PWRGD 1V 1.4V VEE DRAIN PWRGD 1V 1.4V tPHLDL tPHLDL VEE VEE |
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