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UCD3138RHAT 数据表(PDF) 36 Page - Texas Instruments |
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UCD3138RHAT 数据表(HTML) 36 Page - Texas Instruments |
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36 / 78 page  UCD3138 SLUSAP2F – MARCH 2012 – REVISED NOVEMBER 2013 www.ti.com Event 2 and Event 4 are not relevant in Multi mode. DPWMB can cross over the period boundary safely, and still have the proper pulse width, so full 100% pulse width operation is possible. DPWMA cannot cross over the period boundary. Since the rising edge on DPWM B is also fixed, Blanking B-Begin and Blanking B-End can be used for blanking this rising edge. And, of course, Cycle Adjust B is usable on DPWM B. 4.8 DPWM Resonant Mode This mode provides a symmetrical waveform where DPWMA and DPWMB have the same pulse width. As the switching frequency changes, the dead times between the pulses remain the same. The equations for this mode are designed for a smooth transition from PWM mode to resonant mode, as described in the LLC Example section. Here is a diagram of this mode: 36 Functional Overview Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: UCD3138 |
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