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TPA3220 Datasheet(PDF) 30 Page - Texas Instruments |
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TPA3220 Datasheet(HTML) 30 Page - Texas Instruments |
30 / 39 page ![]() 30 TPA3220 SLASEN3 – JANUARY 2018 www.ti.com Product Folder Links: TPA3220 Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated Power Supplies (continued) 11.1.4 BST Supply TPA3220 has built-in bootstrap supply for each half bridge gate drive to supply the high side MOSFETs, only requiring a single capacitor per half bridge. The capacitors are connected to each half bridge output, and are charged by the GVDD supply via an internal diode while the PWM outputs are in low state. The high side gate drive is supplied by the voltage across the BST capacitor while the output PWM is high. It is recommended to place the BST capacitors close to the TPA3220 device, and to keep PCB routing traces at minimum length. |
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