LM5041BMTCX

更新时间： 2024-11-29 05:42:23

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	422K
描述
Cascaded PWM Controller

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中文翻译

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数据手册

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LM5041BMTCX 数据手册

May 1, 2009

LM5041B

Cascaded PWM Controller

General Description

Features

The LM5041B 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 LM5041B includes these four control out-

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

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

en 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 non-overlap time (for voltage-fed applications).

Push-pull stage MOSFETs can be driven directly from the in-

ternal gate drivers while the buck stage requires an external

driver such as the LM5102. The LM5041B 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 100 ns.

Additional features include line Under-Voltage Lock-Out

(UVLO), Soft-Start, an error amplifier, precision voltage ref-

erence, and thermal shutdown.

Internal Start-up Bias Regulator

■

Programmable Line Under-Voltage Lockout (UVLO) with

Adjustable Hysteresis

Current Mode Control

■

Internal Error Amplifier with Reference

Cycle-by-cycle Over-Current Protection

Leading Edge Blanking

Programmable Push-Pull Overlap or Dead Time

Internal 1.5A Push-Pull Gate Drivers

Programmable Soft-Start

Programmable Oscillator with Sync Capability

Precision Reference

Thermal Shutdown

Applications

Telecommunication Power Converters

■

Industrial Power Converters

Multi-Output Power Converters

The differences between LM5041, LM5041A and LM5041B

are as follows: In the LM5041A and the LM5041B version, the

hiccup mode over-current protection is not employed and the

VCC bias regulator is not disabled by a low state at the SS

pin. In the LM5041B version, both the high and low side buck

stage gate drivers are forced to a low state when the controller

is disabled. In the LM5041 and the LM5041B version, the

buck stage controller is disabled by either a low state at the

UVLO pin or a low state at the SS pin. Also in the LM5041B

version, the REF pin 5V regulator is not disabled by a UVLO

pin low state.

Packages

TSSOP-16

■

LLP-16 (5x5 mm) Thermally Enhanced

■

Typical Application Circuit

30086401

Simplified Cascaded Push-Pull Power Converter

300864

www.national.com

12 3 4 5 6 7...16

中文翻译

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与LM5041BMTCX相关器件

型号	品牌	获取价格	描述	数据表
LM5041BMTCX/NOPB	TI	获取价格	Cascaded PWM Controller
LM5041BSD	NSC	获取价格	Cascaded PWM Controller
LM5041BSDX	NSC	获取价格	Cascaded PWM Controller
LM5041MTC	NSC	获取价格	Cascaded PWM Controller
LM5041MTC	TI	获取价格	LM5041 Cascaded PWM Controller
LM5041MTC/NOPB	NSC	获取价格	IC 0.01 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching R
LM5041MTC/NOPB	TI	获取价格	Cascaded PWM Controller
LM5041MTCX	TI	获取价格	LM5041 Cascaded PWM Controller
LM5041MTCX	NSC	获取价格	Cascaded PWM Controller
LM5041MTCX/NOPB	ROCHESTER	获取价格	0.01 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16

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