LM3409

更新时间： 2024-11-25 05:42:03

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器控制器
页数	文件大小	规格书
30页	959K
描述
PFET Buck Controller for High Power LED Drives

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LM3409 数据手册

June 12, 2009

LM3409

LM3409HV

PFET Buck Controller for High Power LED Drives

General Description

Features

The LM3409/09HV are P-channel MosFET (PFET) con-

trollers for step-down (buck) current regulators. They offer

wide input voltage range, high-side differential current sense

with low adjustable threshold voltage, fast output enable/dis-

able function and a thermally enhanced eMSOP-10 package.

These features combine to make the LM3409/09HV ideal for

use as constant current sources for driving LEDs where for-

ward currents up to 5A are easily achievable. The

LM3409/09HV uses Constant Off-Time (COFT) control to

regulate an accurate constant current without the need for

external control loop compensation. Analog and PWM dim-

ming are easy to implement and result in a highly linear

dimming range with excellent achievable contrast ratios. Pro-

grammable UVLO, low-power shutdown, and thermal shut-

down complete the feature set.

2Ω, 1A Peak MosFET Gate Drive

V_INRange: 6V to 42V (LM3409)

V_INRange: 6V to 75V (LM3409HV)

Differential, High-side Current Sense

Cycle-by-Cycle Current Limit

■

No Control Loop Compensation Required

10,000:1 PWM Dimming Range

250:1 Analog Dimming Range

Supports All-Ceramic Output Capacitors and Capacitor-

less Outputs

Low Power Shutdown

■

Thermal Shutdown Protection

Thermally Enhanced eMSOP-10 Package

Applications

LED Driver

■

Constant Current Source

Automotive Lighting

General Illumination

Industrial Lighting

■

Typical Application

30085601

300856

www.national.com

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LM3409_10	NSC	获取价格	PFET Buck Controller for High Power LED Drives
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LM3409HV-Q1	TI	获取价格	用于高功率 LED 驱动器的 75V 汽车类 PFET 降压控制器
LM3409MY	NSC	获取价格	PFET Buck Controller for High Power LED Drives
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