LM3444_15 Datasheet, PDF (21/27 Pages) Texas Instruments – AC-DC Offline LED Driver

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Typical Application (continued)
LM3444
SNVS682D – NOVEMBER 2010 – REVISED DECEMBER 2015
TP3 ^V+
D3
BR1
C2
L4
+
C7
D9
D8
R8
+
D4
C9
C15
L3
C1
V+
R6
C10
R7
D10
D12
L1
RT1
F1
J1
VAC
R2
Q1
D1
D2 _R10
L5
TP14
C5
LM3444
U1
1 NC
NC 10
2 NC
VCC 9
3 NC
GATE 8
TP15
4 COFF
ISNS 7
5 FLTR2
C4
GND 6
V_BUCK
TP4
LED+
V_LED
R4
C12
V_LED-
TP5
LED-
Q3
L2
I_COLL
Q2
TP16
R3
TP7-9
C11
Figure 19. LM3444 Design Example 1 Input = 90 V_AC to 135 V_AC
V_LED = 7 × HB LED String Application at 400 mA
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