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MAX77387EWP+T

更新时间： 2024-09-28 19:55:35
品牌 Logo 应用领域
美信 - MAXIM 开关
页数 文件大小 规格书
80页 5701K
描述
Dual Switching Controller,

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中文翻译

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MAX77387EWP+T 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active包装说明：,
Reach Compliance Code：compliantECCN代码：5A991.G
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：2.31模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
湿度敏感等级：1峰值回流温度（摄氏度）：NOT SPECIFIED
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

MAX77387EWP+T 数据手册

 浏览型号MAX77387EWP+T的Datasheet PDF文件第2页浏览型号MAX77387EWP+T的Datasheet PDF文件第3页浏览型号MAX77387EWP+T的Datasheet PDF文件第4页浏览型号MAX77387EWP+T的Datasheet PDF文件第5页浏览型号MAX77387EWP+T的Datasheet PDF文件第6页浏览型号MAX77387EWP+T的Datasheet PDF文件第7页 
EVALUATION KIT AVAILABLE  
MAX77387  
Dual-Phase Adaptive DC-DC Step-Up Converter  
With 2x 1000mA High-Side Current Regulators  
General Description  
Benefits and Features  
The MAX77387 provides a high-efficiency solution for  
smartphone camera flash applications by integrating a  
dual-phase 2A PWM DC-DC step-up converter and two  
programmable 1A high side, low-dropout LED current  
regulators for flash and torch functions. An I2C interface  
provides flexible control of the step-up converter, torch,  
flash mode selection, and torch/flash safety timer dura-  
tion settings.  
S Input Supply of 2.5V to 5.5V with Full Functionality  
S Dual-Phase Interleave Step-Up DC-DC Converter  
True Shutdown Output  
2A Guaranteed Output Current for V > 2.7V  
IN  
and V  
P 4.0V  
OUT  
Adaptive Output Voltage Regulation to Ensure  
Industry’s Highest System Efficiency  
Over 90% Peak Efficiency  
The IC operates down to 2.5V, making it futureproof for  
new battery technologies. The step-up converter features  
an internal switching MOSFET and synchronous rectifier  
to improve efficiency and minimize external component  
count. Dual-phase operation ensures low output ripple  
and provides smallest possible solution size. The IC also  
includes dual high-side high-current regulators for sup-  
porting torch and flash modes. The high-current regula-  
tors can source up to 1A each in flash mode and up to  
250mA each in torch mode. The high-current regulators  
can be combined to drive a single LED up to 2A in flash  
mode and up to 500mA in torch mode. The output volt-  
age can be adaptively controlled, boosting only as high  
as necessary to support the required LED forward volt-  
age. Adaptive mode can be used in either flash or torch  
mode and works with both DAC and/or PWM dimming  
control schemes. This approach reduces IC power dis-  
sipation by optimizing the boost ratio and by minimizing  
the losses in the current regulators.  
ꢀ 3.125% Minimum Duty Cycle  
ꢀ Skip Mode Capable  
ꢀ On-Chip Power MOSFET and Synchronous  
Rectifier  
ꢀ Up to 4MHz PWM Switching Frequency per  
Phase  
Small 0.47FH Inductor per Phase  
S High-Side Torch/Flash LED Current Regulator  
I2C Programmable Flash Output Current  
(15.625mA to 1000mA in 15.625mA Steps)  
I2C Programmable Torch Output Current  
(3.91mA to 250mA in 3.91mA Steps for Non-  
PWM dimming) (125mA to 1000mA in 125mA  
Steps for PWM Dimming with Programmable  
Duty Cycle from 3.125% to 25% in 3.125% steps)  
Low-Dropout Voltage (80mV typ) at 1000mA  
S I2C-Programmable Flash Safety Timer  
S I2C-Programmable Torch Safety Timer and  
Optional Disabled Torch Timer  
The IC includes control for external NTC, dual Tx mask,  
flash strobe, and torch enable functions. This allows for  
flexible control of the IC.  
S Dual Independent TX_MASK Inputs for Limiting  
Flash Current During Tx Events  
S Open/Shorted LED Detection  
S NTC Monitoring for LED Protection  
S Overvoltage Protection  
Additionally, the IC includes MAXFLASH 2.0 function  
that adaptively reduces flash current during low battery  
conditions to help prevent system undervoltage lockup.  
Other features include shorted LED detection, overvolt-  
age and thermal shutdown protection, and low-power  
standby and shutdown modes. The IC is available in a  
20-bump, 0.4mm pitch WLP package (2.1mm x 1.73mm).  
S MAXFLASH 2.0 Preventing System Undervoltage  
Lockup  
S Thermal Shutdown Protection  
S < 1µA Shutdown Current  
Applications  
S 20-Bump, 0.4mm Pitch 2.1mm x 1.73mm WLP  
Cell Phones and Smartphones  
Tablets  
Ordering Information appears at end of data sheet.  
Simplified Block Diagram appears at end of data sheet.  
For related parts and recommended products to use with this part,  
refer to www.maximintegrated.com/MAX77387.related.  
*Patent protected PCT/US2008/075643.  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-6282; Rev 0; 7/12  
1234567...80

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