CXLE8161输入电压从2.5V到6V固定1MHz开关频率电流模式和固定频率升压转换器内部软启动电路消除启动过程中的浪涌电流欠压锁定过温保护和电流限制电路

CXLE8161是一个电流模式和固定频率升压转换器，集成N-FET驱动多达10个白色LED串联。串联允许LED电流相同，亮度均匀。它的低导通电阻和反馈电压降低了功率损耗，实现了高效率。快速的1MHz电流模式的脉宽调制操作可用于输入和输出电容器和一个小电感，同时最小化输入电源上的纹波。OVP引脚监测输出电压，如果超过过电压阈值，则停止切换。内部软启动电路消除启动过程中的浪涌电流。CXLE8161/A还集成了欠压锁定、过温保护和电流限制电路

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 CXLE8161/A is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 10 white LEDs in series.The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of NFET and feedback voltage reduces power loss and achieves high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An internal soft-start circuit eliminates the inrush current during start-up. The CXLE8161/A also integrates under-voltage lockout, over-temperature protection, and current limit circuits. TheCXLE8161/Ais available in TSOT-23-6Aand TDFN2x2- 8 packages

   产品特点 返回TOP

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· Wide Input Voltage from 2.5V to 6V 

· 0.2V Reference Voltage 

· Fixed 1MHz Switching Frequency 

· High Efficiency up to 88% 

· 100Hz to 200kHz PWM Brightness Control Frequency 

· Open-LED Protection 

· Under-Voltage Lockout Protection 

· Over-Temperature Protection 

·<1mA Quiescent Current During Shutdown 

· TSOT-23-6A and TDFN2x2-8 Packages 

· Lead Free and Green Devices Available (RoHS Compliant)

   应用范围 返回TOP

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· White LED Display Backlighting 

· Cell Phone and Smart Phone 

· PDA, PMP, and MP3 

· Digital Camera

   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