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LM3423_11

更新时间： 2024-11-26 11:34:55

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美国国家半导体 - NSC		/
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描述
LM3423 Buck-Boost 2 Layer Evaluation Board evaluation board showcases most features

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LM3423_11 数据手册

National Semiconductor

Application Note 2010

James Patterson

LM3423 Buck-Boost 2 Layer

Evaluation Board

March 7, 2011

EFFICIENCY WITH 6 SERIES LEDS AT 700mA

Introduction

This wide range evaluation board showcases the LM3423

NFET controller used with a buck-boost current regulator. It

is designed to drive 4 to 8 LEDs at a maximum average LED

current of 700mA from a DC input voltage of 10 to 70V.

The evaluation board showcases most features of the

LM3423 including PWM dimming, fault and LED status flags,

output overvoltage protection and input under-voltage lock-

out. Note that there are two revisions of this PCB. The docu-

mentation for the latest revision (551600305-002 RevA) is

shown first. The schematic, layout and bill of materials for the

first revision (551600305-001 Rev1) can be found at the end

of this document.

The buck-boost circuit can be easily redesigned for different

specifications by changing only a few components (see the

Alternate Designs section found at the end of this application

note). Note that design modifications can change the system

efficiency. See the LM3423 datasheet for a comprehensive

explanation of the device and application information.

30107701

Schematic for 551600305-002 REVA

30107763

301077

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型号	品牌	获取价格	描述	数据表
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LM3423MHX	NSC	获取价格	N-Channel Controllers for Constant Current LED Drivers
LM3423MHX/NOPB	TI	获取价格	具有串联 DIM FET 驱动器和故障标志功能的 N 沟道恒流 LED 驱动器控制器 \|
LM3423Q0	NSC	获取价格	N-Channel Controllers for Constant Current LED Drivers
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LM3423Q0MHX	NSC	获取价格	N-Channel Controllers for Constant Current LED Drivers
LM3423Q0MHX/NOPB	TI	获取价格	具有串联 DIM FET 驱动器和故障标志的汽车类 N 沟道恒流 LED 控制器 \| PW
LM3423Q1	NSC	获取价格	N-Channel Controllers for Constant Current LED Drivers