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参数资料
| 型号： | YB1518ST25 |
| 厂商： | YOBON TECHNOLOGIES, INC. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | Step-up DC-DC Converter White LED Driver |
| 中文描述： | 升压DC - DC转换器白光LED驱动器 |
| 文件页数： | 2/12页 |
| 文件大小： | 1582K |
| 代理商： | YB1518ST25 |
YB1518
Step-up DC-DC Converter White LED Driver
YB1518 MRev.1.2
www.yobon.com.tw
10
5 respectively. Using the above different
scheme, the LED current can be controlled
from 0% to 100% to its maximum value.
Over Voltage Protection
The YB1518 has an internal over voltage
protection circuit which also acts as an
open-circuit protection. In the cases of
open circuit or the LEDs failure, the LEDs
are disconnected from the circuit, and the
feedback voltage will be zero. The YB1518
will then switch to a high duty cycle
resulting in a high output voltage, which
may cause SW pin voltage to exceed its
maximum 34V rating. The YB1518 will
shutdown automatically until input condition
changes to bring it out of the shutdown
mode.
Inductor Selection
A 22uH inductor is recommended for most
applications to drive more than 5 LEDs.
Figure 4. Dimming Control Using
a DC Voltage
Duty
Iout ( mA)
0%
20
20%
17.4
30%
15
40%
12.4
50%
10
60%
8
70%
6.4
80%
4.07
100%
0
PWM : 2V ; 1KHz ;
Vin=3.6V
VDC(V)
VFB Iout(mA)
2
0
1.8
2.2
0.43
1.6
9.2
1.8
1.4
19.6
3.6
1.2
31.1
6
1
43.4
8.5
0.8
63
12.3
0.6
74
14.5
0.4
86.4
16.9
0.2
96.9
19
0
102
20
Figure 5. Dimming Control Using
a Filtered PWM Signal
相关PDF资料 |
PDF描述 |
|---|---|
| YB1518 | Step-up DC-DC Converter White LED Driver |
| YB1520ST25 | High Power Step-up DC-DC Converter, White LED Driver |
| YB1520 | High Power Step-up DC-DC Converter, White LED Driver |
| YB1696-50 | 150KHz, 3A PWM Buck Switching Regulator |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| YB1519 | 制造商:YOBON 制造商全称:YOBON 功能描述:High-Power White LED Driver |
| YB1520 | 制造商:YOBON 制造商全称:YOBON 功能描述:High Power Step-up DC-DC Converter, White LED Driver |
| YB1520ST25 | 制造商:YOBON 制造商全称:YOBON 功能描述:High Power Step-up DC-DC Converter, White LED Driver |
| YB1521 | 制造商:YOBON 制造商全称:YOBON 功能描述:High Power Step-Up DC-DC Converter & WLED Driver |
| YB1521ST25 | 制造商:YOBON 制造商全称:YOBON 功能描述:High Power Step-Up DC-DC Converter & WLED Driver |
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