The CXLE8256 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 7~8 white LEDs in series. The series connection allows the LED current to be identical for uniform brightness. Its low on resistance of N- FET and feedback voltage reduce power loss and achieve high efficiency. Fast 1.1MHz 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. It can driver 3(series)*9(parallel) LEDs or 3(series)*12(parallel) LEDs.
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[ CXLE8256 ]"
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
CXLE8256是一款固定频率电流模式的升压转换器，内部集成了N-FET，可以驱动串联7~8颗白光LED，LED电流可以通过多种方式来做调整，1.1MHZ的工作频率减小了输入输出电容选择和纹波。OVP管脚避免了输出过压烧毁芯片的可能。内部集成的软启动降低了启动过充电流。还集成了欠压保护、过热保护、过流保护功能。封装为超小型的SOT23-6封装。
CXLE8256驱动能力很强，最多可以驱动3串12并共36个LED。
The CXLE8256 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 7~8 white LEDs in series. The series connection allows the LED current to be identical for uniform brightness. Its low on resistance of N- FET and feedback voltage reduce power loss and achieve high efficiency. Fast 1.1MHz 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. It can driver 3(series)*9(parallel) LEDs or 3(series)*12(parallel) LEDs.
The CXLE8256 also integrates under-voltage lockout, over-temperature protection, and current limit circuits. The CXLE8256 is available in a SOT-23-6 package.
二.产品特点
● 输入电压范围：2.5V~6V
● 0.25V 参考电压
● 固定的1.1MHZ开关频率
● 效率达到87%（8*3）或93%（3*9）
● 100Hz到100KHz PWM占空比调光
● 支持欠压保护
● 支持过温保护
● 1.6A输入过流保护
● 29V OVP电压
● 可以驱动3串9并或3串12并白光LED
●<1uA的shun down 电流
● SOT23-6封装
● 无铅封装，符合ROHS标准
• Wide input Voltage from 2.5V to 6V
• 0.25V Reference Voltage
• Fixed 1.1MHz Switching Frequency
• High Efficiency up to 86%(8*4) or 93%(3*12)
• Wide Range for PWM Dimming (100Hz to 200kHz)
• Under-Voltage Lockout Protection
• Over-Temperature Protection
• 29V Over voltage protection
• Can driver 3*9 WLEDs or 3*12 WLEDs
•<1μA Quiescent current During Shutdown
• SOT23-6 Package
• Lead Free and Green Devices Available (ROHS Compliant)
三.应用范围
● 功能手机、智能手机
● PDA、PMP、MP3
● 数码相机
● 白光LED显示屏的驱动
• Cell Phone and Smart Phone
• PDA,PMP,MP3
• Digital Camera
• White LED Display Backlighting
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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LED 驱动系列 |
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|
PN |
ILim |
Vin |
Vout(V) |
Fs |
lq |
Temp |
Package |
Description |
|
A |
V |
KHz |
uA |
|||||
|
1 |
2.5-6 |
Vin-23 |
1200 |
90 |
Ind |
SOT23-6 |
5-6 LED Driver, Can drive 6*4 or 3*12 LEDs |
|
|
1.6 |
2.5-6 |
Vin-29 |
1100 |
90 |
Ind |
SOT23-6 |
8 LEDs per channel |
|
|
1.3 |
2.5-6 |
Vin-40 |
1100 |
150 |
lnd |
SOT23-6 |
10 LEDs per channel |
|
|
1.6 |
2.5-6 |
Vin-29 |
1100 |
90 |
Ind |
SOT23-6 |
8 LEDs per channel |
|
|
1.3 |
2.5-6 |
Vin-40 |
1100 |
150 |
lnd |
SOT23-6 |
10LEDs per channel |
|
