LM5149-Q1开发板套件编程器的评估板-DC/DC与AC/DC（离线）SMPS规格书PDF中文资料

LM5149-Q1属于开发板套件编程器的评估板-DC/DC与AC/DC（离线）SMPS。由德州仪器制造生产的LM5149-Q1评估板 - DC/DC 与 AC/DC（离线）SMPS该系列产品提供了一种方便的方法，可对开关模式电源转换所用的器件（包括 DC-DC 和 AC-DC 型）进行性能或特性评估。“稳压器”（包含内部电源开关装置）和“控制器”（设计为控制外部电源开关）之类的器件均包括在内。

1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Two integrated EMI mitigation mechanisms

– Active EMI Filter for enhanced EMI

performance at lower frequencies

– Selectable dual random spread spectrum

(DRSS) for enhanced EMI performance across

low and high-frequency bands

– EMI reduced by an average of 25 dBμV

– Reduces the external differential-mode input

filter size by 50 and lowers systems cost

– Optimized for CISPR 32 Class B requirements

• Versatile synchronous buck DC/DC controller

– Wide input voltage range of 3.5 V to 80 V

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

adjustable output from 0.8 V to 55 V

– 150°C maximum junction temperature

– Shutdown mode current: 2.3 μA

– No-load sleep current: 9.5 μA

– Stackable up to two phases

– Advanced dropout with frequency foldback

• 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 LM5149 with

WEBENCH® Power Designer

2 Applications

• Building automation

• Industrial transport

• Wireless infrastucture

• Test and measurement

3 Description

The LM5149 is a 80-V, ultra-low IQ synchronous

buck DC/DC controller for high-current, single-output

applications. The controller uses a peak current-mode

control architecture for easy loop compensation,

fast transient response, and excellent load and line

regulation. The LM5149 can be set up in interleaved

dual-phase mode with accurate current sharing for

high-current applications. The device can operate with

VIN as low as 3.5 V, at nearly 100 duty cycle if

needed.

The LM5149 has two unique EMI reduction features:

active EMI filter and dual random spread spectrum

(DRSS). The 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

disturbance. DRSS combines low-frequency triangular

and high-frequency randomized modulations to

mitigate EMI across lower and higher frequency

bands, respectively. This hybrid technique aligns with

the multiple resolution bandwidth (RBW) settings

specified in industry-standard EMC tests.