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EnglishCXLE8748DA CXLE8749 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. 1000mA Buck/Boost Charge Pump Flash LED Driver
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）</span>
5.产品封装 6.电路原理图</strong> 7.相关产品
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℃.
● 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
Cellphones
PADs
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| High Power White LED | ||||||||
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</td> | ||||||||||
| 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 |
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