pc112 2.8-5v四倍升壓驅(qū)動20ma多顆led恒流ic     

pc112/pc113 is a compact, high-efficiency step-up dc-dc converter which drives 2-6 series white leds with constant current from 3v to 5v. extremely low shutdown power supply current ensures the high efficiency of battery system. the pc113 works at 500khz, allowing the application of tiny external components. low feedback voltage and hence minimal input current from the battery extends battery life. built-in   n-channel  power  switches  optimize  the  layout  area  of  pcb.   since pc112/pc113 drives series leds, it regulates the light intensity uniformly. with a single external  resistor or pwm signal,  users can easily set the led current and led brightness.while output loading is open, likes the case of leds failure, the duty cycle of the dc-dc  converter  will  increase  rapidly,  causing  high  output  voltage  to  damage  the circuit.  to  avoid  this  situation,  a  zener  diode  should  be  connected  to  the  dc-dc converter””s output to clamp the output voltage in most applications. however, pc113 has  built-in  the  over-voltage  protection  circuit  to  protect  the  output  circuit  and  thus eliminates the need of the external zener diode.

pc112/pc113 is also characterized of the soft-start feature, which limits the inrush current. it is available in thin-sot type package.

   features:1.   typical 85% efficiency  2. no external power switch; 3. low shutdown supply current; 4. low feedback voltage; 5. drives 6 white leds 20ma from working voltage 2.0v; 6. ±4% led output current accuracy; 7. over voltage protection circuit build in(pc113);  8. soft-start circuit build in; 9. thin 6-pin sot23-6 package

     application:1. white led display backlighting; 2. cellular telephones;  3. personal digital assistant; 4. digital cameras; 5. portable machine

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dd313 三信道大功率恒流驅(qū)動ic 500ma r/g/b恒流驅(qū)動ic     

dm412 三通道裝飾照明專用可直接數(shù)據(jù)級聯(lián)恒流ic 200ma r/g/b恒流驅(qū)動ic   

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dm115b通用8位恒流驅(qū)動ic 恒流一致性及穩(wěn)定性高   

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dm13c  16位驅(qū)動ic 具有短斷點偵測及溫度保護功能，屏幕燈飾使用 mbi5024gf tb62726afg

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dm134,dm135, dm136  16位驅(qū)動ic 主要用于led屏幕及護欄管  

dm137  16位開,短路,過溫智能偵測驅(qū)動ic       

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dd212  1.5-5.5v二倍升壓最大400ma電流輸出驅(qū)動單顆led恒流ic

dd231  3信道驅(qū)動ic 5-30ma 可設(shè)置小體上電即亮型ic   

dd233  4信道驅(qū)動ic 5-30ma 可設(shè)置小體、可開關(guān)型ic    

pc112,pc113  2.8-5v四倍升壓驅(qū)動20ma小功率多顆led恒流ic     

st2225a  35輸出信道之?dāng)?shù)字/字母led驅(qū)動芯片         

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