Texas Instruments LM3448 Evaluation Board LM3448-EDSNEV/NOPB LM3448-EDSNEV/NOPB データシート
製品コード
LM3448-EDSNEV/NOPB
R15
C15
R2
R7
R1
R3
D7
Q1
R8
DIM
COFF
FLTR2
GND
ISNS
FLTR1
ASNS
BLDR
VCC
GND
LM3448
9
10
11
12
13
8
7
6
5
4
V+
C8
V
CC
R22
D8
R14
+
V
LED+
V
LED
±
L1
C6
D2
V+
LINE
NEUTRAL
LINE EMI FILTER
D4
C4
C3
COFF
R16
C12
L2
C2
C
OFF
Current Source
C1
L3
C16
R4
C10
C14
R6
R5
D1
C5
NC
SW
SW
NC
SW
SW
14
15
16
3
2
1
R9
COFF
C13
U1
V
CC
SNOSB51C – SEPTEMBER 2011 – REVISED MAY 2013
DESIGN #2: 6.5W, 120VAC Non-isolated “A19 Edison” Retrofit with AC-Coupled Line Injection
SPECIFICATIONS:
•
AC Input Voltage: 120VAC nominal (85VAC – 135VAC)
•
Output Voltage: 35.7V
DC
•
LED Output Current: 181mA
This TRIAC dimmer compatible design incorporates the following features:
•
•
AC coupled line-injection for improved power factor performance and LED current regulation,
•
Standard V
CC
start-up and bias circuit,
•
V
CC
derived COFF current source.
NOTE: Refer to LM3448 Application Note, AN-2127 (TI Lit Number
), for additional information and
BOM regarding this design.
Figure 40. DESIGN #2 Circuit
Copyright © 2011–2013, Texas Instruments Incorporated
35
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