CXLE8158高效率的电荷泵白光LED驱动器设备驱动四个白光LED恒定的调节电流均匀亮度锂离子电池放电效率90%每个LED输出电流30mA

CXLE8158是一种高效率的电荷泵白光LED驱动器；该设备驱动四个白光LED，具有恒定的调节电流，以获得均匀的亮度。电源电压范围从2.7伏到5.5伏，是锂离子电池应用的最佳选择。CXLE8158在1x、1.5x和2x电荷泵模式下工作，并根据输入电压自动切换电荷泵模式，以保持高功率效率所需的功率。CXLE8158为每个LED提供高达30毫安的总电流为120毫安，并允许多种方法，例如用于LED调光的CTRL0引脚上的脉宽调制信号。三个控制逻辑管脚允许禁用或启用LED组合。在2x模式下，电源电流仅为2mA，EN引脚允许设备以2mA静态电流进入关机模式。CXLE8158开关频率为1MHz，只需要四个1mF陶瓷电容器和一个电阻器，确保低输入电流纹波和EMI。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXLE8158 is a high efficiency charge pump white LED driver; the device drives up four white LEDs with regulated constant current for uniform intensity. The supply voltage ranges from 2.7V to 5.5V and it is optimized for a Li-ion battery application. The CXLE8158 operates in 1x, 1.5x, and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to maintain the required power for high power efficiency. The CXLE8158 provides up to 30mA per LED for a total of 120mA and allows several methods, such as a PWM signal on the CTRL0 pin for LED dimming. Three control logic pins allow to disable or enable a combination of LEDs. The supply current is only 2mA in 2x mode, and the EN pin allows the device to enter shutdown mode with 2mA quiescent current. The CXLE8158 switches at 1MHz frequency and only requires four 1mF ceramic capacitors and one resistor, and ensures low input current ripple and EMI. The CXLE8158 is available in a 16-pin QFN package.

   产品特点 返回TOP

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· ±1.5% LED Current Matching 

· High Efficiency Up to 90% Over Li-ion Battery Discharge 

· Output Current Up to 30mA per LED 

· 2.7V to 5.5V Operating Voltage 

· Allow to Turn On or Off a Combination of LEDs 

· 1x/1.5x/2x Charge Pump Modes 

· Low Shutdown Current: 2mA Maximum 

· Low Input Ripple and EMI 

· Internal Soft-Start Limits Inrush Current 

· Short Circuit Current-Limit 

· Thermal Shutdown Protection 

· Output Over-Voltage Protection 

· 3mmx3mm 16-Pin QFN (QFN3X3-16) Package 

· Lead Free and Green Devices Available (RoHS Compliant)

   应用范围 返回TOP

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· Cellular Phone White LED Back Light 

· Portable Device · PDA and Handheld Computer 

· DSC

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

 

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Lighting and Display Product > White LED Driver
Part_No	Topology	Archi tecture	Input  Voltage (V)		Adj. Output  Voltage V	No.  of  LEDs	LED Current  (Max) (A)	Switch Current Limit (A)	Current Sense Voltage (typ)(V)	Switching Frequency (kHz)	Dimming Control	Package
			min	max	max
CXLE8153	Boost	CM	2.7	6	32	8	0.03	0.9	0.25	1000	Analog	SOT23-6
CXLE8154	Boost	VM	2.5	6	19	4	0.03	0.4	0.25	1000	Analog PWM	SOT23-6
CXLE8155	Boost	CM	2.7	21	30	8	0.6	3.5	0.5	1200	Analog	DFN3x3-10
CXLE8156	Charge  Pump	-	2.8	4.5	-	4	0.03	-	-	1000	Analog PWM  Digital	QFN4x4-16
CXLE8157	Charge  Pump	-	2.8	4.5	-	6	0.03	-	-	1000	Analog PWM Digital	QFN4x4-16
CXLE8158	Charge  Pump	-	2.8	4.5	-	4	0.03	-	-	1000	Analog PWM Digital	QFN3x3-16
CXLE8159	Boost	CM	2.5	6	24	6	0.03	1.2	0.1	1000	Analog PWM	SOT23-6
CXLE8160	Boost	CM	2.5	6	39	10	0.03	0.9	0.3	1000	Analog PWM	SOT23-6
CXLE8161	Boost	CM	2.5	6	24	6	0.03	1.2	0.2	1000	Analog PWM	SOT23-6
CXLE8162	Boost	CM	2.5	6	40	10	0.03	1.5	0.2	600	Analog PWM	TDFN2x2-6
CXLE8163	Boost	CM	2.5	6	24	6	0.03	2	0.2	1500	Analog PWM	SOT23-6
CXLE8164	Buck	CM	3	5.5	-							SOT23-5
CXLE8165	Boost	CM	6	24	65	17	0.18per string	3.3	0.5	200   ~ 900	External PWM Dimming/I2C	TDFN5x5-16
CXLE8166	Boost	CM	2.7	6	40	10	0.03	1.5	0.2	600	Analog  PWM	TDFN2x2-6