EUP3618-700mA电荷泵Flash LED驱动器 DataSheet

概述
EUP3618是一颗大电流输出的电荷泵LED驱动器，用以驱动照相手机或者其他便携式设备的Flash LED。通过外接的两个PIN，可选择其工作模式：Flash模式或Torch模式。在Flash模式下，EUP3618可输出至少500mA，持续至少500毫秒；或者输出高至700mA，但持续时间需相应减少，比如350毫秒。在Torch模式下，EUP3618可持续输出Flash模式下设定的40％的电流。
在Flash模式下,EUP3618始终以2X Charge Pump模式工作；而在Torch模式下，它会自动根据负载电流、LED正向导通电压和输入电压的大小，来优化工作模式，提高效率。

特点
• 高达3A的输出电流
• 轻负载时自动跳跃周期以提高效率
• 230ns最小导通时间
• 35V输入浪涌电压保护
• 内部集成160/110mΩ的DMOS开关管
• 输入电压范围：4.5V至30V
• 输出电压可调：0.925V至20V
• 效率高达95%
• 关断电流<1μA
• 340KHz固定开关频率
• 可编程的软启动
• 过温保护和过流保护
• 输入过压/欠压保护
• SOP-8（EP）封装
• 符合RoHS规范及Pb-Free

应用
• 分布式电源
• 网络系统
• PC设备
• 便携产品

EUP3618-Charge Pump Flash LED Driver with Safety Timer 

Description
The EUP3618 is a high-current charge pump, optimized for driving Flash LEDs used in camera phone and other portable applications. It has two modes of operation which are pin able for either Flash or Torch. In Flash mode, the EUP3618 output can drive 500mA regulated current an LED for a duration of 500ms or up to 700mA for a reduced duration. In Torch mode the EUP3618 regulates the output current to 40% of the Flash mode current setting and can remain enabled continuously.
The EUP3618 operates in 2x mode while operating in Flash mode. In Torch mode it can operate in either 2x or 1x mode depending on the load current, LED forward voltage, and input voltage levels.

Feature
• 3A Output Current
• Automatic Pulse Skipping Mode at Light Load
• 35V Input Surge Protection
• Integrated 160m_/110m_ DMOS Switches
• 4.5V to 30V Input Operating Range
• Output Adjustable from 0.925V to 20V
• Up to 95% Efficiency
• 1μA Shutdown Current
• Fixed 340KHz Frequency
• Programmable Soft-Start
• Thermal Shutdown and Overcurrent Protection
• Input Supply Overvoltage and Undervoltage Lockout
• 230ns Minimum On Time
• Available in SOP-8 (EP) Package
• RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free

Application
• Distributed Power Systems
• Networking Systems
• PC Monitors
• Portable Electronics