Datasheet > LM5146-Q1

LM5146-Q1

更新时间： 2024-11-27 02:51:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
49页	2983K
描述
LM25149 42-V Synchronous Buck DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter

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LM5146-Q1 数据手册

LM25149

_{SNVSBV5 – DECE}L_MM_BE2_R5₂1₀4₂9₀

SNVSBV5 – DECEMBER 2020

www.ti.com

LM25149 42-V Synchronous Buck DC/DC Controller with Ultra-Low I_Qand Integrated

Active EMI Filter

1 Features

2 Applications

•

Two integrated EMI mitigation mechanisms

– Active EMI filter for enhanced EMI performance

at lower frequencies

•

Building automation

Industrial transport

Wireless infrastructure

– Dual random spread spectrum (DRSS) for

enhanced EMI performance across low and

high-frequency bands

3 Description

The LM25149 is a 42-V synchronous buck DC/DC

controller for high-current single-output applications.

Refer to the Errata. The device uses peak current-

– EMI reduced by an average of 25 dBµV

– Reduces the external differential-mode filter

size by 50% and lowers systems cost

Versatile synchronous buck DC/DC controller

– Wide input voltage range of 3.5 V to 42 V

– 1% accurate, fixed 3.3-V, 5-V, 12-V, or

adjustable outputs from 0.8 V to 36 V

– 150°C maximum junction temperature

– Shutdown mode current: 2.2 µA

mode

control

architecture

for

easy

loop

compensation, fast transient response, and excellent

load and line regulation. The LM25149 can be set up

in interleaved mode (paralleled output) with accurate

current sharing for high-current applications. The

LM25149 can operate at input voltages as low as 3.5

V, at nearly 100% duty cycle if needed.

•

The LM25149 has two unique EMI reduction features:

active EMI Filter and Dual Random Spread Spectrum

(DRSS). Active EMI filter senses any noise or ripple

voltage on the DC input bus and injects an out-of-

phase cancellation signal to reduce the noise or ripple

voltage. DRSS combines a low-frequency triangular

and high-frequency random modulation to optimize

EMI preformance in the low-frequency and high-

frequency radio frequency bands.

– No-load standby current: 9 µA

•

Switching frequency from 100 kHz to 2.2 MHz

– SYNC in and SYNC out capability

Inherent protection features for robust design

– Internal hiccup-mode overcurrent protection

– ENABLE and PGOOD functions

– VCC, VDDA, and gate-drive UVLO protection

– Internal or external loop compensation

– Thermal shutdown protection with hysteresis

Create a custom design using the LM25149 with

WEBENCH^®Power Designer

Device Information

PART NUMBER

PACKAGE⁽¹⁾

BODY SIZE (NOM)

•

LM25149

VQFN (24)

3.5 mm × 5.5 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet

CISPR 25 Class 5 Peak

Peak

Average

Start 150 kHz

Stop 30 MHz

CISPR 25 Class 5 Average

Typical Application Schematic

CISPR 25 EMI Performance 150 kHz ̶ 30 MHz

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

Submit Document Feedback

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

Product Folder Links: LM25149

without notice.

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与LM5146-Q1相关器件

型号	品牌	获取价格	描述	数据表
LM5146QRGYRQ1	TI	获取价格	具有宽占空比范围的汽车类 100V 同步降压直流/直流控制器 \| RGY \| 20 \| -
LM5146QRGYTQ1	TI	获取价格	具有宽占空比范围的汽车类 100V 同步降压直流/直流控制器 \| RGY \| 20 \| -
LM5146RGYR	TI	获取价格	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
LM5148	TI	获取价格	3.5V 至 80V、电流模式同步降压控制器
LM5148-Q1	TI	获取价格	具有超低 IQ 的汽车类 80V 同步直流/直流降压控制器
LM5148QRGYRQ1	TI	获取价格	具有超低 IQ 的汽车类 80V 同步直流/直流降压控制器 \| RGY \| 24 \| -4
LM5148RGYR	TI	获取价格	3.5V 至 80V、电流模式同步降压控制器 \| RGY \| 24 \| -40 to 12
LM5149	TI	获取价格	具有超低 IQ 和集成式有源 EMI 滤波器的 80V 同步降压直流/直流控制器
LM5149-Q1	TI	获取价格	LM25149 42-V Synchronous Buck DC/DC Controller with Ultra-Low IQ and Integrated Active EMI
LM5149QRGYRQ1	TI	获取价格	具有超低 IQ 和集成有源 EMI 滤波器的 80V 汽车类同步降压直流/直流控制器 \|

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