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YB1314

更新时间: 2024-02-03 09:16:41
品牌 Logo 应用领域
裕邦科技 - YOBON
页数 文件大小 规格书
1页 102K
描述
120mA 1x/1.5x/2x Charge Pump for White LED

YB1314 数据手册

  
Preliminary YB1314  
120mA 1x/1.5x/2x Charge Pump for White LED  
Description  
Features  
The YB1314 charge pump drive up to 4  
white LEDs with regulated constant current.  
The devices can be used to produce  
current levels up to 30mA for each output  
from a 2.7V to 5.5V input. The 1MHz  
fix-frequency switching allows for tiny  
external components, and the regulation  
scheme is optimized to ensure low EMI and  
low input ripple.  
„ Input Range : 2.7V to 5.5V  
„ Drives up to 4 LEDs at 30mA Each  
„ 1MHz Internal Oscillator  
„ Thermal Protection Shutdown  
„ Output Short-circuit Current Limit and  
Overvoltage Protection  
„ Undervoltage Lockout With  
Hysteresis  
„ Automatic Soft-Start Reduces  
In-Rush Current  
Serial data input control is used to enable,  
disable and set the LED drive current for a  
32 level logarithmic scale LED brightness  
control. Internal softstart circuitry effectively  
reduces the in-rush current. YB1314 also  
„ Three Charge Pump Mode1x/1.5x/2x  
„ 3mm x 3mm QFN package  
Applications  
provides  
short  
circuit  
protection,  
tion and  
„ White LED Backlighting  
„ Handheld PCs and PDAs  
„ Mobile Phone  
over-temperature  
protect-  
over-voltage protection. In shutdown mode,  
the shutdown current is less than 1µA.  
YB1314 is available in a QFN-16 3*3  
package.  
Typical Application Circuit  
VIN  
C1+  
C1  
1µF  
VOUT  
C1-  
C2+  
C2  
+
-
CIN  
1µF  
COUT  
2.2µF  
1µF  
VBATTERY  
C2-  
YB1314  
D1  
D2  
D3  
D4  
EN/SET  
EN/SET  
D4  
D3  
D2  
D1  
GND  
Figure 1. Typical application circuit  
www.yobon.com.tw  
YB1314 MRev.0.1  
1

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