LM5041A

更新时间： 2024-11-26 11:56:39

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
16页	720K
描述
Cascaded PWM Controller

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LM5041A 数据手册

May 2005

LM5041A

Cascaded PWM Controller

General Description

Features

n Internal Start-up Bias Regulator

The LM5041A PWM controller contains all of the features

necessary to implement either current-fed or voltage-fed

push-pull or bridge power converters. These “Cascaded”

topologies are well suited for multiple output and higher

power applications. The LM5041A’s four control outputs in-

clude: the buck stage controls (HD and LD) and the push-

pull control outputs (PUSH and PULL). Push-pull outputs are

driven at 50% nominal duty cycle at one half of the switching

frequency of the buck stage and can be configured for either

a guaranteed overlap time (for current-fed applications) or a

guaranteed both-off time (for voltage-fed applications).

Push-pull stage MOSFETs can be driven directly from the

internal gate drivers while the buck stage requires an exter-

nal driver such as the LM5102. The LM5041A includes a

high-voltage start-up regulator that operates over a wide

input range of 15V to 100V. The PWM controller is designed

for high-speed capability including an oscillator frequency

range up to 1 MHz and total propagation delays of less than

100ns. Additional features include: line Under-Voltage Lock-

out (UVLO), soft-start, an error amplifier, precision voltage

reference, and thermal shutdown.

n Programmable Line Under-Voltage Lockout (UVLO) with

Adjustable Hysteresis

n Current Mode Control

n Internal Error Amplifier with Reference

n Cycle-by-cycle Over-Current Protection

n Leading Edge Blanking

n Programmable Push-Pull Overlap or Dead Time

n Internal 1.5A Push-Pull Gate Drivers

n Programmable Soft-start

n Programmable Oscillator with Sync Capability

n Precision Reference

n Thermal Shutdown

Applications

n Telecommunication Power Converters

n Industrial Power Converters

n Multi-Output Power Converters

n +42V Automotive Systems

The two differences between the LM5041 and the LM5041A

are: No second level current limit in the ’A’ version No

softstart (SS) shutdown comparator in the ’A’ version .

Packages

n TSSOP-16

n LLP-16 (5x5 mm) Thermally Enhanced

Typical Application Circuit

20137801

Simplified Cascaded Push-Pull Power Converter

DS201378

www.national.com

12 3 4 5 6 7...16

中文翻译

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与LM5041A相关器件

型号	品牌	获取价格	描述	数据表
LM5041A_15	TI	获取价格	LM5041A Cascaded PWM Controller
LM5041AMTC	TI	获取价格	LM5041A Cascaded PWM Controller
LM5041AMTC	NSC	获取价格	Cascaded PWM Controller
LM5041AMTC/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 685 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator
LM5041AMTC/NOPB	TI	获取价格	LM5041A Cascaded PWM Controller
LM5041AMTC-NOPB	TI	获取价格	LM5041A Cascaded PWM Controller
LM5041AMTCX	TI	获取价格	LM5041A Cascaded PWM Controller
LM5041AMTCX	NSC	获取价格	Cascaded PWM Controller
LM5041AMTCX/NOPB	TI	获取价格	Cascaded PWM controller with buck Stage disable options 16-TSSOP -40 to 125
LM5041AMTCX/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 685 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator

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