YB1519
High-Power White LED Driver
Typical Characteristics
.
V
IN=3 to6V
10µF
16V
VIN
33µH
SL12
V
IN=5 to8V
10µF
16V
22µH
SL12
LX
EN
Bypass
LX
4.7µF
35V
36V
EN
Bypass
VIN
LX
LX
36V
4.7µF
35V
YB1519
FB
I
SET
10nF
9.1K
AGND
PGND
2K
YB1519
FB
I
SET
10nF
PGND
AGND
2K
R
FB
60OHM
1K
FB
R
60OHM
Figure 3. 8 LEDs in a Series
Figure 4. 10 LEDs in a Series
V
IN=8 to14V
10µF
16V
VIN
EN
Bypass
10µH
SL12
V
IN=8 to 14V
10µF
16V
33µH
SL12
LX
4.7µF
35V
VIN
36V
4.7µF
35V
36V
LX
EN
Bypass
LX
YB1519
FB
YB1519
FB
2K
I
SET
PGND
AGND
2K
I
SET
10nF
1K
R
FB1
60OHM
R
FB2
60OHM
1K
AGND
PGND
R
FB1
60OHM
R
FB2
60OHM
Figure 5. 2 Legs of 6 LEDs in a Series
Figure 6. 2 Legs of 9 LEDs in a Series
CH1:
LX
CH2:
Inductor Current
CH3:
V
OUT
(18 LEDs)
Figure 7. Typical Switching Waveform
CH1:
EN
CH2:
LX
CH3:
V
OUT
(18 LEDs)
Figure 8. PWM Brightness Control by EN
YB1519 MRev.1.2
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4
YOBON [ YOBON TECHNOLOGIES,INC. ]
