CXLE8748DA是一款电流调节电荷泵，非常适合为照相机闪光灯应用中的高亮度LED供电。充电泵可设置为调节闪光灯和手电筒模式的两个电流水平。
CXLE8748DA CXLE8749自动在升压和降压之间切换模式，确保LED电流不依赖于正向电压。它的开关频率为2.2兆赫，允许使用微型元件。电源电压范围从2.7伏到5.5伏，非常适合由一个锂离子电池或三到四个镍镉、镍氢或碱性电池供电的所有应用。
CXLE8748DA CXLE8749还具有非常低的关机电流、自动软启动模式以限制浪涌电流以及过电流、过电压和过热关机控制。
低电流感测参考电压（50mV）允许使用小的0603电流感测电阻器。
输出电流高达1000毫安
●火炬模式下高达95%的效率
●可调闪光模式电流
●自动降压/升压模式切换
●宽输入电压范围：2.7V至5.5V
最小外部组件：无感应器
●高频运行：2.2兆赫
●低损耗传感用低50mV参考电压
●脉宽调制调光控制
●自动软启动限制涌流
●低纹波和电磁干扰
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[ CXLE8748DA ]"
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）
一.产品概述
The CXLE8748DA CXLE8749 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes.
The CXLE8748DA CXLE8749 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. It switches at 2.2MHz, allowing the use of tiny components. The supply voltage ranges from 2.7V to 5.5V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline battery cells.
The CXLE8748DA CXLE8749 also features a very low shutdown current, an automatic soft-start mode to limit inrush current, as well as over current, over voltage and over-Thermal shutdown control.
A low current sense reference voltage (50mV) allows the use of small 0603 current sensing resistors.
The CXLE8748DA CXLE8749 is available in Green DFN3×3-10L package and is specified over an ambient temperature range of -40℃ to +85℃.
二.产品特点
● Output Current up to 1000mA
● Up to 95% Efficiency in Torch Mode
● Adjustable FLASH Mode Current
● Automatic Buck/Boost Mode Switchover
● Wide Input Voltage Range: 2.7V to 5.5V
● Minimum External Components: No Inductors
● High Frequency Operation: 2.2MHz
● Low 50mV Reference for Low Loss Sensing
● PWM Dimming Control
● Automatic Soft Start Limits Inrush Current
● Low Ripple and EMI
三.应用范围
Cellphones
PADs
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南 更多同类产品......
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Product |
Character | Typ. | Ope. Voltage |
Quie. |
Iq | Output | LED Current | Package |
| CXLE87100 | 1.0MHz OVP 3W LED Asynchronous PWM | 90% | 0.9～6.5V | 1mA | 1μA | ＜0.8A | Fix(Vfb=95mV) | SOT23-6L |
| CXLE87100B | 1.0MHz OVP 3W LED Asynchronous PWM | 90% | 0.9～6.5V | 1mA | 1μA | ＜0.8A | Auto adjust(Type Vfb=95mV) | SOT23-6L |
| CXLE87101 | 2.0MHz 1.5A Flash LED Driver | 95% | 2.7～5.5V | 300μA | 1μA | 1.5A | Independent RSETM/RSETF Current set pins | TDFN32-14L |
| 电源管理 > LED驱动 > 闪光灯驱动 | ||||||||||
| Product | Topology | VIN | VOVP | IQ | IOUT | R(ON) | Freq. | Package | Size | |
| Min. | Max. | Typ. | Typ. | MAX. | Typ. | Typ. | (L×W) | |||
| (V) | (V) | (uA) | (A) | (Ω) | (MHz) | (mm) | ||||
| CXLE8747 | Current Sink | 2.7 | 5.5 | - | 220 | 0.2 | - | - | SOT363 | 2.1 x 2.3 |
| CXLE8748DA | Charge Pump | 2.7 | 5.5 | 5.5 | 300 | 1 | 0.5 | 2.2 | DFN3030-10L | 3.0 x 3.0 |
| CXLE8749 | Charge Pump | 2.7 | 5.5 | 5.5 | 300 | 1 | 0.5 | 2.2 | DFN3030-10L | 3.0 x 3.0 |
| CXLE8750 | Charge Pump | 2.7 | 5.5 | 5.5 | 300 | 0.8 | 0.8 | 2.4 | DFN3030-10L | 3.0 x 3.0 |
| CXLE8751 | Charge Pump | 2.7 | 5.5 | 5.5 | 300 | 1 | 0.6 | 2.4 | DFN3030-10L | 3.0 x 3.0 |
