Texas Instruments LM3448 -120VAC, 6W Isolated Flyback LED Driver Eval Board LM3448-120VFLBK/NOPB LM3448-120VFLBK/NOPB 데이터 시트
제품 코드
LM3448-120VFLBK/NOPB
R15
C11
FLTR2
R2
R7
DIM
R9
C14
R1
R3
D7
Q1
R8
V+
C7
C8
V
CC
R22
D8
R13
R14
VLED+
VLED
±
L1
C5
R4
V+
LINE
NEUTRAL
INPUT EMI FILTER AND RECTIFIER CIRCUIT
D1
D3
D4
D5
C3
DIM
V
CC
FLTR2
R11
C10
R10
TRIAC HOLDING
CIRCUIT
R16
C12
Q3
Q4
R20
C1
D6
C6
L2
R6
R24
C2
R5
D2
T1
C13
+
LM3448
9
10
11
12
13
4
5
6
7
8
BLDR
ASNS
ISNS
DIM
COFF
GND
VCC
FLTR1
GND
FLTR2
14
3
NC
NC
15
2
SW
SW
16
1
SW
SW
COFF
COFF
R18
C9
COFF CURRENT
SOURCE
V
CC
V
AUX
R17
V
AUX
C15
Q5
D12
OVP CIRCUIT
FLTR2
R19
D13
V
AUX
Q2
D9
VCC AUXILIARY BIAS CIRCUIT
R12
D11
D10
C4
V
CC
PGND SGND
Evaluation Board Schematic
15
Evaluation Board Schematic
Figure 40. Evaluation Board Schematic
32
AN-2090 LM3448 -120VAC, 6W Isolated Flyback LED Driver
SNOA554C – October 2011 – Revised May 2013
Copyright © 2011–2013, Texas Instruments Incorporated