Cxle8346 cxle8346a cxle8346b cxle8346c cxle8346d cxle8346e is a high precision step-down LED constant current control chip with source power factor correction, which is suitable for the non isolated step-down LED constant current power supply of 85vac-265vac full range input voltage. Cxle8346 cxle8346a cxle8346b cxle8346c cxle8346d cxle8346e integrated active power factor correction circuit can achieve high power factor and low total harmonic distortion. Due to the critical continuous mode of inductor current, the power MOS transistor is in the zero current on state, the switching loss can be reduced, and the utilization rate of inductor is also high. Cxle8346 has multiple protection functions to enhance system reliability, including LED open circuit protection, led short circuit protection, chip power supply undervoltage protection, current sampling resistance open circuit protection and cycle by cycle current limiting. All protection states have automatic restart function
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[ CXLE8346 ]"
目录
产品概述 返回TOP
CXLE8346 CXLE8346A CXLE8346B CXLE8346C CXLE8346D CXLE8346E是一颗带有源功率因数校正的高精度降压型LED恒流控制芯片，适用于 85Vac-265Vac 全 范围输入电压的非隔离降压式LED恒流电源。 CXLE8346 CXLE8346A CXLE8346B CXLE8346C CXLE8346D CXLE8346E集成有源功率因数校正电路，可以实现很高的功率因数，具有很低的总谐波失真。由于工作 在电感电流临界连续模式，功率 MOS管处于零电 流开通状态，开关损耗得以减小，同时电感的利用 率也较高。 CXLE8346具有多重保护功能以加强系统可靠性，包 括LED 开路保护、LED短路保护、芯片供电欠压保 护、电流采样电阻开路保护和逐周期限流等。所有的保护状态都具有自动重启功能。LED短路保护短路 功耗很小。另外，CXLE8346 CXLE8346A CXLE8346B CXLE8346C CXLE8346D CXLE8346E具有过热调节功能，在驱 动电源过热时减小输出电流，以提高系统的可靠性。 CXLE8346 CXLE8346A CXLE8346B CXLE8346C CXLE8346D CXLE8346E采用 SOT23-6 封装。
产品特点 返回TOP
有源功率因数校正，高PF值，低THD
高达95%的系统效率
±3% LED 输出电流精度
优异的线电压调整率和负载调整率
电感电流临界连续模式
超低 (50uA) 启动电流
超低 (300uA) 工作电流
内置OVP下分压电阻
LED 短路延迟保护/开路保护
电流采样电阻开路保护
逐周期电流限流
芯片供电欠压保护
自动重启功能
过热调节功能
采用SOP23-6封装
应用范围 返回TOP
LED 球泡灯、射灯
日光灯
其它 LED 照明
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
相关芯片选择指南 返回TOP
| 高PFC高效非隔离降压型恒流LED驱动芯片(PFC Controller Non-isolated Buck Offline LED Driver) | ||||||
| Part No. | Features | Mode | VIN | Current Accu. | Rdson(ohm) | Package |
| CXLE8346 | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | Ext-MOS | SOT23-6 |
| CXLE8346A | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | 8 | SOP8 |
| CXLE8346B | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | 5 | SOP8 |
| CXLE8346C | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | 4 | SOP8 |
| CXLE8346D | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | 4 | DIP8 |
| CXLE8346E | PFC Controller Non-isolated Buck LED Driver | PWM | 85~264V(AC) | ±3% | 1.85 | SOP8 |
