Texas Instruments LM3448 -120VAC, 6W Isolated Flyback LED Driver Eval Board LM3448-120VFLBK/NOPB LM3448-120VFLBK/NOPB Datenbogen
Produktcode
LM3448-120VFLBK/NOPB
List of Figures
1
Demo Board
.................................................................................................................
2
LED Current vs. Line Voltage (using TRIAC Dimmer)
.................................................................
3
Efficiency vs. Line Voltage
.................................................................................................
4
Power Factor vs. Line Voltage
............................................................................................
5
LED Current vs. Line Voltage
.............................................................................................
6
Output Power vs. Line Voltage
............................................................................................
7
SW FET Drain Voltage Waveform (V
IN
= 120V
RMS
, 9 LEDs, I
LED
= 228mA)
..........................................
8
FLTR2 Waveform (V
IN
= 120V
RMS
, 9 LEDs, I
LED
= 228mA)
.............................................................
9
LINE – CISPR/FCC Class B Peak Scan
.................................................................................
10
NEUTRAL – CISPR/FCC Class B Peak Scan
..........................................................................
11
LINE – CISPR/FCC Class B Average Scan
.............................................................................
12
NEUTRAL – CISPR/FCC Class B Average Scan
......................................................................
13
EN-61000-3 Class C Limits
................................................................................................
14
Forward phase circuit at full brightness
..................................................................................
15
Forward phase circuit at 90° firing angle
.................................................................................
16
Forward phase circuit at 150° firing angle
...............................................................................
17
Reverse phase circuit at full brightness
..................................................................................
18
Reverse phase circuit at 90° firing angle
................................................................................
19
Reverse phase circuit at 150° firing angle
...............................................................................
20
Top Side - Thermal Scan
..................................................................................................
21
Bottom Side - Thermal Scan
.............................................................................................
22
Device Pin-Out
.............................................................................................................
23
Wiring Connection Diagram
..............................................................................................
24
Top View
....................................................................................................................
25
Bottom View
................................................................................................................
26
Evaluation Board Schematic
.............................................................................................
27
Direct Line-Injection Circuit
...............................................................................................
28
FLTR2 Waveform with No Dimmer
.....................................................................................
29
Typical Operation of FLTR2 Pin
........................................................................................
30
DCM Flyback Current Waveforms
......................................................................................
31
Switch Node Ringing
......................................................................................................
32
TVS Diode Clamp
.........................................................................................................
33
Bias Supply Circuits
.......................................................................................................
34
Auxiliary Winding Bias Circuit
............................................................................................
35
COFF Current Source Circuit
............................................................................................
36
TRIAC Holding Circuit
....................................................................................................
37
OVP Circuit
.................................................................................................................
38
Input EMI Filter
.............................................................................................................
39
Inrush Current Spike
......................................................................................................
40
Evaluation Board Schematic
.............................................................................................
41
Top Layer
...................................................................................................................
42
Bottom Layer
...............................................................................................................
List of Tables
1
Pin Description 16 Pin Narrow SOIC
...................................................................................
2
Test Points
.................................................................................................................
3
Bill of Materials
.............................................................................................................
2
AN-2090 LM3448 -120VAC, 6W Isolated Flyback LED Driver
SNOA554C – October 2011 – Revised May 2013
Copyright © 2011–2013, Texas Instruments Incorporated