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LM3423 数据表(PDF) 1 Page - Texas Instruments

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部件名 LM3423
功能描述  N-Channel Controllers for Constant-Current LED Drivers
Download  72 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3423 数据表(HTML) 1 Page - Texas Instruments

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OVP
nDIM
LM3421
AGND
VIN
PGND
DDRV
DAP
GATE
EN
COMP
VIN
CSH
RCT
IS
HSP
RPD
VCC
HSN
1
2
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4
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8
16
15
14
13
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11
10
9
ILED
PWM
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Reference
Design
LM3421, LM3421-Q1, LM3423, LM3423-Q1
SNVS574F – JULY 2008 – REVISED JULY 2015
LM342x/-Q1 N-Channel Controllers for Constant-Current LED Drivers
1 Features
3 Description
The LM3421 and LM3423 family of devices are
1
LM3421Q1/LM3423Q1 are Automotive Grade
versatile high voltage N-channel MOSFET controllers
Products That are AEC-Q100 Grade 1 Qualified
for LED drivers. They can be easily configured in
LM3421Q0/LM3423Q0 are Automotive Grade
buck, boost, buck-boost and SEPIC topologies. This
Products That are AEC-Q100 Grade 0 Qualified
flexibility, along with an input voltage rating of 75 V,
makes the LM3421 and LM3423 devices ideal for
VIN Range From 4.5 V to 75 V
illuminating LEDs in a large family of applications.
High-Side Adjustable Current Sense
Adjustable high-side current sense voltage allows for
2-
Ω, 1-A Peak MOSFET Gate Driver
tight regulation of the LED current with the highest
Input Undervoltage and Output Overvoltage
efficiency possible. The LM3421 and LM3423 devices
Protection
use predictive off-time (PRO) control, which is a
PWM and Analog Dimming
combination of peak current-mode control and a
predictive off-timer. This method of control eases the
Cycle-by-Cycle Current Limit
design of loop compensation while providing inherent
Programmable Switching Frequency
input voltage feed-forward compensation.
Zero Current Shutdown and Thermal Shutdown
The LM3421 and LM3423 devices include a high-
LED Output Status Flag (LM3423/23Q1/23Q0
voltage start-up regulator that operates over a wide
Only)
input range of 4.5 V to 75 V. The internal PWM
Fault Status Flag and Timer (LM3423/23Q1/23Q0
controller
is
designed
for
adjustable
switching
Only)
frequencies of up to 2 MHz, thus enabling compact
solutions.
2 Applications
Device Information(1)
LED Drivers: Buck, Boost, Buck-Boost, and
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SEPIC
LM3421
Indoor and Outdoor Area SSL
HTSSOP (16)
5.00 mm × 4.40 mm
LM3421-Q1
Automotive
LM3423
HTSSOP (20)
6.50 mm × 4.40 mm
General Illumination
LM3423-Q1
Constant-Current Regulators
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Boost Application Circuit
1
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.


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