LM3444A9 Datasheet, PDF (5/10 Pages) National Semiconductor (TI) – Edison Retrofit Evaluation Board included in this shipment converts

Output Current versus Number of LEDs for Various Modifications
# of LEDs
2
3
4
5
6
7
8
9
10
11
12
13
14 (Note 5)
15 (Note 5)
16 (Note 5)
17 (Note 5)
18 (Note 5)
Output Current (mA)
Original Circuit
340
315
300
275
260
245
230
215
205
196
190
183
175
170
Output Current (mA)
Modification A (Note 2)
Output Current (mA)
Modification B (Note 3)
248
265
235
250
222
237
210
224
200
212
190
200
180
190
170
180
164
170
156
162
150
155
142
148
135
142
130
137
Note 2: Modification A: R14 = 2.37Ω, R16 = 150kΩ, C3 = 330µF, 63V.
Note 3: Modification B: R14 = 2.2Ω, R16 = 165kΩ.
Note 4: Modification C: R14 = 1.2Ω, R16 = 137kΩ, L3 = 470µH, C3 = 1000µF, 25V.
Note 5: For all applications using greater than 13 LEDs a 330µF, 63V output capacitor (C3) was used.
Output Current (mA)
Modification C (Note 4)
520
500
475
455
432
412
5
www.national.com