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LM3421 Datasheet(PDF) 41 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) 41 Page - Texas Instruments

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CO
D1
ROV2
ROV1
1A
ILED
RSNS
RFS
CFS
COV
Q2
VIN
VIN
OVP
nDIM
LM3421
AGND
VIN
PGND
DDRV
DAP
GATE
EN
COMP
VIN
CSH
RCT
IS
HSP
RPD
VCC
HSN
L1
CBYP
RLIM
Q1
CCMP
RCSH
RT
RUV2
RUV1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RHSN
RHSP
CT
CIN
10V ± 70V
LM3421, LM3421-Q1, LM3423, LM3423-Q1
www.ti.com
SNVS574F – JULY 2008 – REVISED JULY 2015
Typical Applications (continued)
8.2.2 LM3421 Buck-Boost Application
Figure 36. LM3421 Buck-Boost Application
8.2.2.1 Design Requirements
N = 6
VLED = 3.5 V
rLED = 325 mΩ
VIN = 24 V
VIN-MIN = 10 V
VIN-MAX = 70 V
fSW = 500 kHz
VSNS = 100 mV
ILED = 1 A
ΔiL-PP = 700 mA
ΔiLED-PP = 12 mA
ΔvIN-PP = 100 mV
Copyright © 2008–2015, Texas Instruments Incorporated
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Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1



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