Texas Instruments LM3423 Evaluation Board LM3423BBLSCSEV/NOPB LM3423BBLSCSEV/NOPB 数据表
产品代码
LM3423BBLSCSEV/NOPB
OVP
nDIM
LM3421
AGND
V
IN
PGND
DDRV
DAP
GATE
EN
COMP
V
IN
CSH
RCT
IS
HSP
RPD
V
CC
HSN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
I
LED
PWM
SNVS574E – JULY 2008 – REVISED MAY 2013
N-Channel Controllers for Constant Current LED Drivers
Check for Samples:
1
FEATURES
DESCRIPTION
The LM3421/23 are versatile high voltage N-channel
2
•
LM3421Q1/LM3423Q1 are Automotive Grade
MosFET controllers for LED drivers . They can be
Products That are AEC-Q100 Grade 1 Qualified
easily configured in buck, boost, buck-boost and
(-40°C to +125°C Operating Junction
SEPIC topologies. This flexibility, along with an input
Temperature) and Similarly
voltage rating of 75V, makes the LM3421/23 ideal for
LM3421Q0/LM3423Q0 are AEC-Q100 Grade 0
illuminating LEDs in a large family of applications.
Qualified (-40°C to +150°C Operating Junction
Adjustable high-side current sense voltage allows for
Temperature)
tight regulation of the LED current with the highest
•
V
IN
Range From 4.5V to 75V
efficiency possible. The LM3421/23 uses Predictive
•
High-Side Adjustable Current Sense
Off-time (PRO) control, which is a combination of
peak current-mode control and a predictive off-timer.
peak current-mode control and a predictive off-timer.
•
2
Ω
, 1A Peak MosFET Gate Driver
This method of control eases the design of loop
•
Input Under-Voltage and Output Over-Voltage
compensation while providing inherent input voltage
Protection
feed-forward compensation.
•
PWM and Analog Dimming
The
LM3421/23
devices
include
a
high-voltage
•
Cycle-by-Cycle Current Limit
startup regulator that operates over a wide input
•
Programmable Switching Frequency
range of 4.5V to 75V. The internal PWM controller is
designed for adjustable switching frequencies of up to
designed for adjustable switching frequencies of up to
•
"Zero Current" Shutdown and Thermal
2.0 MHz, thus enabling compact solutions. Additional
Shutdown
features include "zero current" shutdown, analog
•
LED Output Status Flag (LM3423/23Q1/23Q0
dimming, PWM dimming, over-voltage protection,
Only)
under-voltage lock-out, cycle-by-cycle current limit,
and thermal shutdown.
and thermal shutdown.
•
Fault Status Flag and Timer
(LM3423/23Q1/23Q0 Only)
(LM3423/23Q1/23Q0 Only)
The LM3423 also includes an LED output status flag,
a fault flag, a programmable fault timer, and a logic
a fault flag, a programmable fault timer, and a logic
APPLICATIONS
input to select the polarity of the dimming output
driver.
driver.
•
LED Drivers - Buck, Boost, Buck-Boost, and
SEPIC
SEPIC
The
LM3421Q1/23Q1
are
AEC-Q100
grade
1
qualified and LM3421Q0/23Q0 are AEC-Q100 grade
•
Indoor and Outdoor Area SSL
0 qualified.
•
Automotive
•
General Illumination
•
Constant-Current Regulators
Typical Boost Application Circuit
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.