产品概述 返回TOPziz嘉泰姆
CXLE88127是一款固定2MHz或者4MHz频率的电流模同步升压型转换器。该芯片可以给闪光灯LED应用提供最大1.5A的恒定电流驱动。配备行业标准的I2C串行数字输入接口，用于启用、禁用和设置LED闪光灯的电流。CXLE88127有四个逻辑输入控制端，分别为硬件闪光灯使能（STROBE）、闪光灯中断（TX）、Torch使能信号（TORCH/TEMP）、芯片使能信号（HWEN）。在闪光模式下，LED电流源可以提供从21.8mA到1.5A不等的目标电流。并且在常亮模式下，可编程电流的范围也可以在1.954mA到358mA的范围内变化。过压保护功能保证输出电压低于LED开路情况下的过压门限。当输出短路到地时，输出短路保护功能可以限制输出电流。NTC功能会根据温度升高限制输出电流。CXLE88127采用12个引脚的小型封装。（Small 12-bump WSCP package）The CXLE88127 is a 2MHz or 4MHz fixed frequency,
current mode synchronous boost converter with two
current sources. The device is designed to operate 1.5A
constant current driver for single channel.
An industry-standard I2C serial digital input is used to
enable, disable and set the current for flash LED. The
CXLE88127 has four logic inputs including a hardware
Flash Enable (STROBE), a Flash Interrupt input (TX), a
hardware Torch Enable (TORCH/TEMP), Acitve High
Enable (HWEN). In flash mode, the LED current source
provides target current levels from 21.8mA to 1.5A. And
also in torch mode, the programmable current ranges
from 1.954mA to 358mA.
The CXLE88127contains serveral protect functions in
abnormal conditions such as: Overvltage Protection,
Current Limit, NTC Monitoring Protection,
Undervoltage Lockout Protection, Thermal Shutdown
Protection and LED/OUT short Protection. Built-in
circuitry prevents excessive inrush current during start-up.
The chip’s quiescent current is less than 1.0μA in
shutdown mode.
CXLE88127is available in a small 12-bump WCSP
package.
产品特点 返回TOPziz嘉泰姆
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‧2.5V~5.5V的输入电压范围</p>
‧转换效率高达85%ziz嘉泰姆
‧2MHz或者4 MHz的固定开关频率</p>
‧I2C兼容接口ziz嘉泰姆
- 400kHz的串行传输速率ziz嘉泰姆
- 选择闪光/常亮/IR/待机等状态</p>
- 编程调控闪光LED电流，电流范围从21.8mA到1.5Aziz嘉泰姆
- 编程调控常亮LED电流，电流范围从1.954mA到358mAziz嘉泰姆
- 编程调控闪光超时计时器</p>
- 编程调控电流斜率计时器</p>
- 编程调控输入电压闪存监视器（IVFM）</p>
‧真正的负载断开ziz嘉泰姆
‧输入电流限制ziz嘉泰姆
‧输出过压和短路、过温保护电路</p>
‧NTC监测功能ziz嘉泰姆
‧12-Bump WCSPziz嘉泰姆
‧符合RoHS标准，百分百无铅、无卤族元素ziz嘉泰姆
2.5V to 5.5V Input Supply Rangeziz嘉泰姆
Up to 85% Efficiencyziz嘉泰姆
2MHz or 4MHz Fixed Switching Frequencyziz嘉泰姆
I2C-Compatible Interfaceziz嘉泰姆
- 400-kHz Serial Transfer Rateziz嘉泰姆
- Flash/Torch/IR/Standbyziz嘉泰姆
- Programmable Flash LED Current from 21.8mA toziz嘉泰姆
1.5Aziz嘉泰姆
- Programmable Torch LED Current from 1.954mAziz嘉泰姆
to 358mAziz嘉泰姆
- Programmable Flash Time-Out Timerziz嘉泰姆
- Programmable Current Ramp Timerziz嘉泰姆
- Programmable Input Voltage Flash Monitorziz嘉泰姆
(IVFM)ziz嘉泰姆
True Load Disconnectziz嘉泰姆
Input Current Limitziz嘉泰姆
Output Over-Voltage, Short Circuit andziz嘉泰姆
Over-Temperature Protectionziz嘉泰姆
NTC Monitoringziz嘉泰姆
0.4mm Pitch, 12-Bump WCSPziz嘉泰姆
RoHS Compliant and 100% Lead(Pb)-Freeziz嘉泰姆
Halogen-Freeziz嘉泰姆
应用范围 返回TOPziz嘉泰姆
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‧LED闪光灯</p>
‧智能手机ziz嘉泰姆
‧平板电脑ziz嘉泰姆
LED Photo Flash/Movieziz嘉泰姆
Smart phoneziz嘉泰姆
Tabletsziz嘉泰姆
技术规格书（产品PDF) 返回TOP ziz嘉泰姆
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