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UCD3138 Datasheet(PDF) 41 Page - Texas Instruments |
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UCD3138 Datasheet(HTML) 41 Page - Texas Instruments |
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41 / 68 page  T s t a 31 t a 32 t a 41 t a 42 t a 51 t a 52 t a 62 t a 61 w 1 d w 2 w 2 Ipri Ramp T s t a 31 t a 32 t a 51 t a 52 t a 62 t a 61 d Phase_Shift Mode PWM DPWM3A DPWM3B DPWM2A DPWM2B DPWM0A DPWM0B d d d d a2 a1 a3 a4 fs< fr fr fs> fr PWM Mode LLC Mode Tr = 1/fr Tr = 1/fr i s fs = fr_max UCD3138 www.ti.com SLUSAP2 A – MARCH 2012 – REVISED MARCH 2012 4.12.2 LLC Example In LLC, three modes are used. At the highest frequency, a pulse width modulated mode (Multi Mode) is used. As the frequency decreases, resonant mode is used. As the frequency gets still lower, the synchronous MOSFET drive changes so that the on-time is fixed and does not increase. Here are the waveforms for the LLC: Copyright © 2012, Texas Instruments Incorporated Functional Overview 41 Submit Documentation Feedback Product Folder Link(s): UCD3138 |
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