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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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L6732 Scheda tecnica(PDF) 20 Page - STMicroelectronics |
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L6732 Scheda tecnica(HTML) 20 Page - STMicroelectronics |
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20 / 37 page  Device description L6732 20/37 5.11 Minimum on-time (TON, MIN) The device can manage minimum on-times lower than 100 ns. This feature comes down from the control topology and from the particular over-current-protection system of the L6732. In fact, in a voltage mode controller the current has not to be sensed to perform the regulation and, in the case of L6732, neither for the over-current protection, given that during the off-time the valley-current-protection can operate in every case. The first advantage related to this feature is the possibility to realize extremely low conversion ratios. Figure 15 shows a conversion from 14 V to 0.3 V at 500 kHz with a TON of about 50 ns. The on-time is limited by the turn-on and turn-off times of the MOSFETs. Figure 15. 14 V -> 0.3 V @ 500 kHz, 5 A 50ns VPHASE IL VOUT |
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