Datasheet > LM5041B_15

LM5041B_15

更新时间： 2024-02-24 00:24:55

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德州仪器 - TI		/
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描述
Cascaded PWM Controller

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数据手册

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LM5041B_15 数据手册

LM5041B

www.ti.com

SNVS605 –MAY 2009

LM5041B Cascaded PWM Controller

Check for Samples: LM5041B

FEATURES

DESCRIPTION

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 outputs: 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 specified overlap time (for

current-fed applications) or a specified non-overlap

time (for voltage-fed applications). Push-pull stage

MOSFETs can be driven directly from the internal

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 reference, 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

WSON-16 (5x5 mm) Thermally Enhanced

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.

All trademarks are the property of their respective owners.

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...20

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与LM5041B_15相关器件

型号	品牌	获取价格	描述	数据表
LM5041BMTC	NSC	获取价格	Cascaded PWM Controller
LM5041BMTC/NOPB	TI	获取价格	Cascaded PWM Controller
LM5041BMTCX	NSC	获取价格	Cascaded PWM Controller
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

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