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LM3248TMENOPB Fiches technique(PDF) 13 Page - Texas Instruments |
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LM3248TMENOPB Fiches technique(HTML) 13 Page - Texas Instruments |
13 / 31 page VCON IOUT 1V/DIV 500mV/DIV 200mA/DIV 20µS/DIV TRISE = 6.8µS TFALL = 6.2µS VOUT IOUT 10mV/DIV 20mA/DIV 20µS/DIV VOUT_AC ENA 1V/DIV 2V/DIV 500mV/DIV BOOST_GATE 20µS/DIV 2V/DIV VCON VOUT VBUCK_OUT VCON IOUT 1V/DIV 500mV/DIV 50mA/DIV 20µS/DIV TRISE = 7.8µS TFALL = 7.6µS 40µS/DIV 1A/DIV 2V/DIV 2V/DIV SW_BUCK VOUT IL (Buck) ENA 1V/DIV 2V/DIV 500mV/DIV BOOST_GATE 2V/DIV VCON VOUT 20µS/DIV LM3248 www.ti.com SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013 TYPICAL CHARACTERISTICS (continued) For all Efficiency vs Load Current graphs, L1=1276AS-H-1R0N, L3=1285AS-H-1R5N. Startup in Auto-Boost Mode VBATT=2.7V, Load=200 mA, MODE=2G, VOUT=0.4↔4V, Timed Output Current Limit into Short Circuit TR=TF=10µS VBATT=4.3V, VOUT=2.5V, Load=6.8Ω/Short to GND Figure 21. Figure 22. VCON Transient Response VCON Transient with Boost Active VBATT=3.8V, VOUT= 0.8V↔3.3V, MODE=LOW VBATT=3.2V, MODE=2G, VOUT= 0.4↔4 V, Load=11.4Ω BOOST_GATE=LOW, Load=20 Ω, TR=TF=10µS Figure 23. Figure 24. VCON Transient Response VCON Transient Response VBATT=3.8V, VOUT= 1.4V↔3.4V, MODE=LOW VBATT=3.8V, VOUT=1.0V, MODE=LOW BOOST_GATE=LOW, Load=6.8 Ω, TR=TF=10µS BOOST_GATE=LOW, Load=0A ↔60mA, TR=TF=10µS Figure 25. Figure 26. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 13 Product Folder Links: LM3248 |
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