TPS40304A

更新时间： 2024-09-13 07:04:47

品牌	Logo	应用领域
德州仪器 - TI		输入元件控制器
页数	文件大小	规格书
18页	444K
描述
3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER

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TPS40304A 数据手册

TPS40304A

www.ti.com

SLUSA30 –FEBRUARY 2010

3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER

Check for Samples: TPS40304A

FEATURES

CONTENTS

•

Input Voltage Range from 3 V to 20 V

Device Ratings

Fixed 600-kHz Switching Frequency

Electrical Characteristics

Device Information

High- and Low-Side FET R_DS(on)Current

Sensing

Application Information

Additional References

•

Programmable Thermally Compensated OCP

Levels

•

Programmable Soft-Start

591-mV, 1% Reference Voltage

Voltage Feed-Forward Compensation

Supports Pre-Biased Output

APPLICATIONS

•

POL Modules

Printer

Digital TV

Telecom

Frequency Spread Spectrum

Thermal Shutdown Protection at 145°C

10-Pin 3 mm × 3 mm SON Package with

Ground Connection to Thermal Pad

DESCRIPTION

The TPS40304A is a cost-optimized synchronous buck controller that operates from 3-V to 20-V input. The

controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that

responds instantly to input voltage change. The switching frequency is fixed at 600 kHz.

Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI

noise and making it much easier to comply with EMI standards.

The TPS40304A offers design with a variety of user programmable functions, including soft-start, overcurrent

protection (OCP) levels, and loop compensation.

The OCP level is programmed by a single external resistor connected from LDRV pin to circuit ground. During

initial power on, the TPS40304A enters a calibration cycle, measures the voltage at the LDRV pin, and sets an

internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop

across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40304A

then enters a shutdown and restart cycle until the fault is removed.

SIMPLIFIED APPLICATION DIAGRAM

OUT

TPS40304A

BOOT

HDRV

COMP

OUT

PGOOD

EN/SS LDRV/OC

VDD

BP 10

GND

PAD

UDG-10008

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...18

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与TPS40304A相关器件

型号	品牌	获取价格	描述	数据表
TPS40304A_1	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40304ADRCR	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40304ADRCT	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40304DRCR	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40304DRCT	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40305	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40305DRCR	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40305DRCT	TI	获取价格	3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER
TPS40-31	TOTAL-POWER	获取价格	40 WATT OPEN - FRAME SWITCHING POWER SUPPLY
TPS40-32	TOTAL-POWER	获取价格	40 WATT OPEN - FRAME SWITCHING POWER SUPPLY

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