公开(公告)号：US10090769B2

公开(公告)日：2018-10-02

申请号：US15363188

申请日：2016-11-29

Applicant: Texas Instruments Incorporated

Inventor： Shailendra Kumar Baranwal ,  Maurizio Granato ,  Giovanni Frattini

IPC: H02M1/00 ,  H02M5/42 ,  H02M7/04 ,  H02M7/68 ,  H02M7/217 ,  H02M3/335 ,  H02M1/08

Abstract: An electronic device, which includes an H-bridge circuit and a miniaturized transformer that is coupled to operate at VHF frequency, and a driver circuit for an n-type power transistor of the H-bridge circuit are disclosed. The driver circuit includes a first p-type transistor and an n-type transistor coupled between an upper rail and a lower rail, with an output taken between the drains of the first p-type transistor and the n-type transistor being coupled to a gate of the n-type power transistor. The driver circuit also includes a sample-and-hold capacitor coupled to capture a drain voltage for the first n-type power transistor on a first edge of a control signal for the first n-type power transistor and a comparator coupled to compare the captured drain voltage to a lower rail on a given edge of a clock signal and to provide a comparator value. The driver circuit also includes an up/down counter, which is coupled to receive the comparator value, to adjust a counter value responsive to receiving the comparator value and to output the counter value, and a first timing circuit that is coupled to receive the counter value and to send an adjustable pulse towards a gate of the first p-type transistor and a gate of the n-type transistor.

公开(公告)号：US20170331376A1

公开(公告)日：2017-11-16

申请号：US15658667

申请日：2017-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED ,  Texas Instruments Deutschland GmbH

Inventor： Maurizio Granato ,  Giovanni Frattini ,  Pietro Giannelli ,  Michael Lueders ,  Christian Rott

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  G05F1/565 ,  G05F1/573 ,  G05F1/595 ,  H02M3/142 ,  H02M3/33569 ,  H02M2001/0003

Abstract: Described examples include DC to DC converters and systems with switching circuitry formed by four series-connected switches, inductors connected between the ends of the switching circuitry and corresponding output nodes, and with a flying capacitor coupled across interior switches of the switching circuitry and a second capacitor coupled across the ends of the switching circuitry. A control circuit operates the switching circuit to control a voltage signal across the output nodes using a first clock signal and a phase shifted second clock signal to reduce output ripple current and enhance converter efficiency using valley current control. The output inductors are wound on a common core in certain examples.

公开(公告)号：US09570992B2

公开(公告)日：2017-02-14

申请号：US14984076

申请日：2015-12-30

Applicant: Texas Instruments Incorporated

Inventor： Roberto Giampiero Massolini ,  Maurizio Granato ,  Giovanni Frattini

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/158 ,  H02M2001/008 ,  H02M2001/009

Abstract: Disclosed examples include multiple output DC to DC converters with a buck converter including a half bridge switching circuit and transformer primary winding to provide a first output voltage signal, as well as a boost converter to provide an isolated second output voltage signal. The boost converter includes a transformer secondary winding magnetically coupled with the primary winding to provide a boost converter inductor, a switching circuit, an output diode providing the second output voltage signal, and a PWM controller that synchronizes the boost converter switching with the low side switch of the buck converter based on a sensed voltage of the transformer secondary winding.

Abstract translation: 公开的示例包括具有包括半桥开关电路和变压器初级绕组的降压转换器的多输出DC至DC转换器，以提供第一输出电压信号，以及提供隔离的第二输出电压信号的升压转换器。 升压转换器包括与初级绕组磁耦合的变压器次级绕组，以提供升压转换器电感器，开关电路，提供第二输出电压信号的输出二极管和将升压转换器开关与低压开关同步的PWM控制器 基于感测到的变压器次级绕组的电压的降压转换器。