LM3424 Datasheet, PDF (30/69 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs

LM3424, LM3424-Q1
SNVS603C – AUGUST 2009 – REVISED AUGUST 2015
Typical Applications (continued)
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V_IN
R_UV2
R_UV1
C_IN
R_UVH
C_CMP
R_CSH
R_T
1
VIN
LM3424
20
HSP
R_HSP
2
EN
19
HSN
R_HSN
3
COMP
18
SLOPE
R_SLP
4
CSH
17
IS
5
RT/SYNC
6
nDIM
16
VCC
C_BYP
15
GATE
C_FS
R_SNS
R_FS
C_OUT
R_{PU D2}
DIM
D1
L1
Q2 _ILED
Q1
R_OV2
Q5
C_SS
7
SS
14
GND
R_LIM
R_GAIN
8
TGAIN
R_REF1
9
TSENSE
10
TREF
DAP
13
DDRV
12
OVP
DIM
C_DIM
11
VS
C_OV
R_OV1
C_REF
R_REF2
R_BIAS
Q3
PWM
C_NTC
NTC
Figure 37. Buck Regulator (V_IN > V_O)
30
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