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LM3421 Datasheet(PDF) 29 Page - Texas Instruments

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Part # LM3421
Description  N-Channel Controllers for Constant-Current LED Drivers
PDF  72 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3421 Datasheet(HTML) 29 Page - Texas Instruments

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background image
RT
CT
LM3421/23
RCT
Start tON
VIN/25
Reset timer
RSNS
VIN
LED-
RT
CT
VSW
LM3421/23
RCT
Start tON
VIN/25
Reset timer
T
T
SW
C
R
25
f
x
=
LM3421, LM3421-Q1, LM3423, LM3423-Q1
www.ti.com
SNVS574F – JULY 2008 – REVISED JULY 2015
Application Information (continued)
(33)
For all topologies, the CT capacitor is recommended to be 1 nF and should be located very close to the LM34xx-
Q1.
Figure 31. Off-timer Circuitry for Boost and Buck-
Figure 32. Off-timer Circuitry for Buck Regulators
boost Regulators
Copyright © 2008–2015, Texas Instruments Incorporated
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Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1



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