YB1509
High-Power White LED Driver
Typical Characteristics
.
V
IN=3 to 6V
10µF
16V
VIN
EN
Bypass
33µH
SL12
V
IN=5 to 8V
10µF
16V
22µH
SL12
4.7µF
35V
LX
EN
Bypass
VIN
LX
4.7µF
35V
YB1509
FB
YB1509
FB
I
SET
10nF
9.1K
GND
I
SET
R
FB
60OHM
10nF
1K
GND
R
FB
60OHM
Figure 3. 8 LEDs in a Series
Figure 4. 10 LEDs in a Series
33µH
V
IN=8 to 14V
V
IN=8 to 14V
10µF
16V
VIN
EN
Bypass
LX
4.7µF
35V
10µH
SL12
SL12
10µF
16V
VIN
EN
Bypass
LX
4.7µF
35V
YB1509
FB
YB1509
FB
I
SET
10nF
1K
GND
I
SET
R
FB1
60OHM
R
FB2
60OHM
10nF
1K
GND
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
YB1509 MRev.1.1
www.yobon.com.tw
4
YOBON [ YOBON TECHNOLOGIES,INC. ]
