CXLE8848 380kHz的固定频率脉冲宽度调制降压DC转换器宽5V至32V输入电压1.5A恒定输出电流能力PWM控制电路能够将占空比从0%线性调整到100%内置热关机功能

CXLE8848是一个380kHz的固定频率脉冲宽度调制降压（降压）DC/DC转换器，能够驱动1.5A的负载，具有高效率、低纹波和良好的线和负载调节。该调节器需要最少数量的外部元件，使用简单，包括内部频率补偿和固定频率振荡器。该PWM控制电路能够将占空比从0%线性调整到100%。一个使能功能，一个过电流保护功能内置。内置一个内部补偿块以最小化外部组件计数
n宽5V至32V输入电压范围
n输出电流检测电压为0.24V
n最小压降0.3V
n固定380KHz开关频率
n 1.5A恒定输出电流能力
n内部优化功率MOSFET
n优良的线路和负载调节
n效率高达96%
n TTL关闭能力
具有滞后功能的n-EN引脚
n内置热关机功能

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 CXLE8848 is a 380 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 1.5A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. An internal compensation block is built in to minimize external component count.

   产品特点 返回TOP

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n Wide 5V to 32V Input Voltage Range 

n Output Current Sense Voltage is 0.24V 

n Minimum Drop Out 0.3V 

n Fixed 380KHz Switching Frequency 

n 1.5A Constant Output Current Capability 

n Internal Optimize Power MOSFET 

n Excellent line and load regulation 

n High efficiency up to 96% 

n TTL shutdown capability 

n EN pin with hysteresis function 

n Built in thermal shutdown function 

n Built in current limit function n SOIC-8 package

   应用范围 返回TOP

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n MR16 LED Lamp 

n LED Lighting

   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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降压型LED射灯驱动IC
型号	工作电压范围	输出电流	输出电 流精度	线性调 整率	效率	工作频率	调光功能	封装
CXLE8835ES	6V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	ESOP8
CXLE8835MR	6V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	SOT-26
CXLE8836	6V-60V	1.2A	2%		94%	1.1MHz	PWM/模拟 调光	SOT-89-5
CXLE8837	2V-6.5V	0.95A	10%	0.45%	92%	1.4 MHz	PWM调光	SOT-25
CXLE8838	2.5V-5.5V	0.7A	3%		93%	1.4MHz	PWM调光	SOT-25
CXLE8839	5.5V-36V	扩流2.5A	1%		96%	1MHz	PWM调光	SOT-26
CXLE8840	4V--28V	扩流25W	1%		96%	2MHz	PWM/模拟 调光	SOT-26
CXLE8841	2.5V-100V	扩流2.5A	1%		90%	1MHz	PWM调光	SOT-26
CXLE8842	5-100V	1.5A	1%		92%	1MHz	PWM/模拟 调光	ESOP8
CXLE8843	5-100V	2.5A	1%		92%	1MHz	PWM/模拟 调光	ESOP8
CXLE8844	6V-100V	扩流3A	3%		95%	200KHz	PWM调光	SOT-26
CXLE8845	8V-45V	3A	3%		95%	220KHz		ESOP8
CXLE8846	8V-40V	4A	3%		95%	220KHz	PWM调光	TO252-5L
CXLE8847	8V-40V	5A	3%		95%	220KHz		TO263-5L
CXLE8848	5V-36V	1.5A	2%		96%	380KHz	PWM调光	SOP-8
CXLE8849	4.5V-45V	2A	2%		83%	150KHz	PWM调光	ESOP8
CXLE8850	8V-45V	3A	2%		89%	150KHz		ESOP8
CXLE8851	8V-40V	3A	2%		89%	180KHz		SOP8
CXLE8852	8V-40V	3.5A	2%		87%	180KHz	PWM调光	ESOP8
CXLE8853	8V-40V	2A	2%		89%	110KHz		SOP8
CXLE8854B	7V-40V	2.5A	2%		89%	250KHz		ESOP8
CXLE8855	8V-40V	5A	2%		86%	150KHz		TO263-5L
CXLE8835	6V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	SOT89-5
CXLE8835B	6V-34V	1.0A	5%	1.50%	97%	1MHz(max)	PWM/模拟 调光	SOT89-5