公开(公告)号：US20210194367A1

公开(公告)日：2021-06-24

申请号：US17116794

申请日：2020-12-09

Applicant: Texas Instruments Incorporated

Inventor： Yangwei YU ,  Jian LIANG ,  Weicheng ZHANG ,  Ming LUO

IPC: H02M3/158 ,  H02M1/088 ,  H02M1/14 ,  H02M1/15

Abstract: A DC-DC converter control circuit includes an error amplifier, a voltage-to-current conversion circuit, an oscillator circuit, and a pulse frequency modulation (PFM) control circuit. The error amplifier is configured to generate a difference voltage as a difference of an output voltage of the DC-DC converter circuit and a reference voltage. The voltage-to-current conversion circuit configured to convert the difference voltage to a difference current. The oscillator circuit is configured to generate a clock signal at a predetermined frequency for pulse width modulation. The PFM control circuit is configured to disable the oscillator circuit, based on the difference current, for PFM operation.

公开(公告)号：US20160087633A1

公开(公告)日：2016-03-24

申请号：US14847264

申请日：2015-09-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Weicheng ZHANG ,  Huanzhang HUANG ,  Yanli FAN ,  Roland SPERLICH

IPC: H03K19/0944

CPC classification number: H03K19/0944 ,  H03K19/018578

Abstract: A driver includes first and second resistors coupled to a supply voltage and coupled to pairs of main transistors at positive and negative output nodes. The first and second pairs of main transistors provide emphasis and de-emphasis on the positive and negative output nodes. The driver also includes a delay inverter, a pull up booster and a pull down booster. The delay inverter delays and inverts each of a pair of differential input signals to provide delayed and inverted differential signals. The pull up booster provides a bypass current path that bypasses the first and second resistors but includes at least some of the first and second pairs of main transistors. The pull down booster provides an additional current path from the supply voltage through the first or second resistor to ground.

Abstract translation: 驱动器包括耦合到电源电压的第一和第二电阻器，并且耦合到正和负输出节点处的主晶体管对。 第一和第二对主晶体管对正和负输出节点提供强调和去加重。 该驱动器还包括一个延迟逆变器，一个上拉升压器和一个下拉式升压器。 延迟反相器延迟并反相一对差分输入信号，以提供延迟和反相的差分信号。 上拉升压器提供绕过第一和第二电阻器但包括第一和第二对主晶体管中的至少一些的旁路电流路径。 下拉升压器提供从电源电压通过第一或第二电阻到地的附加电流路径。

公开(公告)号：US20220326724A1

公开(公告)日：2022-10-13

申请号：US17231176

申请日：2021-04-15

Applicant: Texas Instruments Incorporated

Inventor： Weicheng ZHANG ,  Jian LIANG

IPC: G05F1/567 ,  H03K5/24

Abstract: A voltage converter includes an inductor, a transistor, a comparator, an error amplifier, and a slope generator circuit. The transistor has a control input and first and second transistor current terminals. The first current terminal is coupled to the inductor. The comparator has first and second comparator inputs and a comparator output. The comparator output is usable to control the transistor's control input. The error amplifier has an error amplifier input and an error amplifier output. The error amplifier output is coupled to the first comparator input. The slope generator circuit is coupled to at least one of the first or second comparator inputs. The slope generator circuit is configured to generate a slope compensation current which, during at least a portion of each cycle of operation of the voltage regulator, varies approximately exponentially with respect to time.