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参数资料
| 型号： | YB1509 |
| 厂商： | YOBON TECHNOLOGIES, INC. |
| 英文描述： | High-Power White LED Driver |
| 中文描述： | 大功率白光LED驱动器 |
| 文件页数： | 5/7页 |
| 文件大小： | 101K |
| 代理商： | YB1509 |
YB1509
High-Power White LED Driver
YB1509 MRev.1.1
www.yobon.com.tw
5
Set Q
1.23V
VREF
Reset
VFB
I SET
EN
SW
Charge Enable
VB AT
CIN
Cout
D1
Q1
60O HM
Off Tim e
C ontrol
L1
VIN
B ypass
GND
10nF
Figure 9. Block Diagram
Functional Block Diagram
Functional Description
The
YB1509
is
a
constant
current
high-power white LED driver. It can drive up
to 10 LEDs in series or 18 LEDs in
parallel/series configuration. The IC uses a
peak current, 1s off-time PFM scheme.
The inductor current ramp up when power
NPN is turn on. Once the inductor current
reaches the preset value determined by the
ISET pin, output power NPN is shut off and
the energy stored in inductor is delivered to
the output capacitor. Once the discharge
cycle is completed, the power NPN is on
again. If the FB voltage has not yet reached
the designated value of 1.23V, the inductor
current will be charged up again. This
charging and discharging sequence will
repeat itself until the FB voltage gets to the
designated value and triggers the on-off
latch to hold off the power NPN regardless
the inductor current value.
LED Current and Brightness control
The LED’s current is set by the resistor
connected at FB pin to GND using:
FB
LED
R
V
I
23
.
1
=
LED’s
brightness
is
accomplished
by
applying a PWM signal with a frequency
range between 100Hz and 50KHz to the
EN pin.
Inductor Current Set
Using a resistor connected from ISET to
GND is able to set inductor current. An 8A
current source is coming out of the YB1509
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PDF描述 |
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| YB1510 | Step-up DC-DC Converter,White LED Driver |
| YB1517ST25 | Step-up DC-DC Converter & White LED Driver |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| YB1510 | 制造商:YOBON 制造商全称:YOBON 功能描述:Step-up DC-DC Converter,White LED Driver |
| YB1517 | 制造商:YOBON 制造商全称:YOBON 功能描述:Step-up DC-DC Converter & White LED Driver |
| YB1517ST25 | 制造商:YOBON 制造商全称:YOBON 功能描述:Step-up DC-DC Converter & White LED Driver |
| YB1518 | 制造商:YOBON 制造商全称:YOBON 功能描述:Step-up DC-DC Converter White LED Driver |
| YB1518ST25 | 制造商:YOBON 制造商全称:YOBON 功能描述:Step-up DC-DC Converter White LED Driver |
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