Datasheet > LM3421-Q1

LM3421-Q1

更新时间： 2023-09-03 20:31:56

品牌	Logo	应用领域
德州仪器 - TI		驱动控制器驱动器
页数	文件大小	规格书
77页	2589K
描述
具有串联 DIM FET 驱动器的汽车类 N 沟道恒流 LED 控制器

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LM3421-Q1, LM3423-Q1

SNVSB95 –JULY 2019

LM342x-Q1 N -Channel Controllers for Constant-Current LED Drivers

1 Features

3 Description

The LM3421-Q1 and LM3423-Q1 family of devices

are versatile high voltage N-channel MOSFET

controllers for LED drivers. They can be easily

configured in buck, boost, buck-boost and SEPIC

topologies. This flexibility, along with an input voltage

rating of 75 V, makes the these controllers ideal for

illuminating LEDs in a large family of applications.

•

AEC Qualified for Automotive Applications

–

Device Temperature Grade 1: −40°C ≤ T_A≤

125°C (LM3421-Q1 and LM3423-Q1)

–

Device Temperature Grade 0: −40°C ≤ T_A≤

150°C (LM3421-Q0 and LM3423-Q0)

•

V_INRange From 4.5 V to 75 V

Adjustable high-side current sense voltage allows for

tight regulation of the LED current with the highest

efficiency possible. The LM3421-Q1 and LM3423-Q1

devices use predictive off-time (PRO) control, which

is a combination of peak current-mode control and a

predictive off-timer. This method of control eases the

design of loop compensation while providing inherent

input voltage feed-forward compensation.

High-Side Adjustable Current Sense

2-Ω, 1-A Peak MOSFET Gate Driver

Input Undervoltage and Output Overvoltage

Protection

•

PWM and Analog Dimming

Cycle-by-Cycle Current Limit

Programmable Switching Frequency

Zero Current Shutdown and Thermal Shutdown

The LM3421-Q1 and LM3423-Q1 devices include a

high-voltage start-up regulator that operates over a

wide input range of 4.5 V to 75 V. The internal PWM

controller is designed for adjustable switching

frequencies of up to 2 MHz, thus enabling compact

solutions.

LED Output Status Flag (LM3423-Q1 and

LM3423-Q0 Only)

•

Fault Status Flag and Timer(LM3423-Q1 and

LM3423-Q0 Only)

Device Information⁽¹⁾

2 Applications

PART NUMBER

LM3421-Q1

PACKAGE

HTSSOP (16)

HTSSOP (20)

BODY SIZE (NOM)

5.00 mm × 4.40 mm

6.50 mm × 4.40 mm

•

LED Drivers: Buck, Boost, Buck-Boost, and

SEPIC

LM3423-Q1

•

Indoor and Outdoor Area SSL

Automotive

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

General Illumination

Constant-Current Regulators

Typical Boost Application

V_IN

VIN

HSN 16

HSP 15

RPD 14

IS 13

COMP

CSH

RCT

AGND

OVP

nDIM

I_LED

VCC 12

GATE 11

PGND 10

PWM

DDRV

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...77

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