公开(公告)号：US09306458B2

公开(公告)日：2016-04-05

申请号：US14318307

申请日：2014-06-27

Applicant: Texas Instruments Incorporated

Inventor： Joseph Maurice Khayat ,  Ramanathan Ramani ,  Michael G. Amaro

IPC: H02M3/158

CPC classification number: H02M3/158

Abstract: A power circuit combination includes a series capacitor buck converter including a first half-bridge including a first high side power switch (HSA), first low side power switch (LSA) and a second half-bridge. A transfer capacitor (Ct) is connected in series with HSA and LSA, and between the first and second half-bridges. An adaptive HS driver circuit has an output coupled to a gate of HSA and includes a power supply circuit including a summing circuitry that dynamically outputs a variable power supply level (VGX) based on a fixed voltage and a voltage across Ct, a buffer driver, and a boost capacitor (CA) across the buffer driver. VGX is coupled to a positive terminal of CA. The power supply circuit is configured so that as a voltage across Ct varies, VGX adjusts so that a voltage across CA is changed less than a change in voltage across Ct.

Abstract translation: 电源电路组合包括串联电容器降压转换器，其包括包括第一高侧功率开关（HSA），第一低侧功率开关（LSA）和第二半桥的第一半桥。 传输电容器（Ct）与HSA和LSA以及第一和第二半桥之间串联连接。 自适应HS驱动器电路具有耦合到HSA的栅极的输出，并且包括电源电路，其包括基于固定电压和跨越Ct的电压来动态地输出可变电源电平（VGX）的求和电路，缓冲器驱动器， 和缓冲驱动器上的升压电容（CA）。 VGX耦合到CA的正端子。 电源电路被配置为使得当Ct上的电压变化时，VGX进行调整，使得CA两端的电压变化小于Ct两端的电压变化。

公开(公告)号：US11476760B2

公开(公告)日：2022-10-18

申请号：US16927558

申请日：2020-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Robert Allan Neidorff ,  Saurav Bandyopadhyay ,  Ramanathan Ramani

IPC: H02M3/158 ,  H02M1/08 ,  H02M3/157

Abstract: In some examples, a system includes a voltage source terminal, a voltage reference terminal, a field effect transistor (FET), a current source, a comparator, and adjustment circuitry. The FET has a gate terminal and a non-gate terminal, the gate terminal coupled to the voltage source terminal. The current source is coupled to the non-gate terminal. The comparator has a comparator output and first and second comparator inputs, the first comparator input coupled to the non-gate terminal, and the second comparator input coupled to the voltage reference terminal. The adjustment circuitry has a circuitry input and a circuitry output, the circuitry input coupled to the comparator output, and the adjustment circuitry configured to adjust the circuitry output responsive to the circuitry input, in which the adjustment reduces a drive strength of the circuit.

公开(公告)号：US11211865B2

公开(公告)日：2021-12-28

申请号：US16799112

申请日：2020-02-24

Applicant: Texas Instruments Incorporated

Inventor： Joseph Maurice Khayat ,  Sergio Carlo-Rodriquez ,  Michael G. Amaro ,  Ramanathan Ramani ,  Pradeep S. Shenoy

IPC: H02M3/158 ,  H02M3/07

Abstract: A series capacitor buck converter includes a first half-bridge circuit including a first high side power switch (HSA) and first low side power switch (LSA) connected in series having a first switching node (SWA) therebetween which drives a first output inductor, a second half-bridge circuit including a second HS power switch (HSB) and second LS power switch (LSB) connected in series having a second switching node (SWB) therebetween which drives a second output inductor. A transfer capacitor (Ct) is connected in series with HSA and LSA and between the first and second half-bridge circuits. A first current source is coupled for precharging Ct with a charging current (I_in) and a second current source is coupled to Ct for providing an output current (I_out). A feedback network providing negative feedback forces I_out to match I_in.