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发布者:来自网络 发布时间:2016/10/28 阅读:6347次    关键字: LED
FP7208-PWM Boost Controller for LED Driver


FP7208-Non-Synchronous PWM Boost Controller for LED Driver DataSheet

FP7208应用说明  Application Note

FP7208 12V TO 36V 0.8A

FP7208 5V TO 18V 1A

General Description
    The FP7208 and FP7208B are boost topology switching regulator for LED driver. They provide built-in gate driver pin for driving external N-MOSFET. The non-inverting input of error amplifier connects to a 0.1V default reference voltage. They have programmable soft start time set by external capacitors, and over voltage protection set by external resistors. FP7208B has programmable frequency set by external resistor. The LED current can be adjusted by applying an external signal to
the EN pin. The EN pin accepts either a DC voltage or a PWM signal. The PWM signal filter components are contained within the chip.
    The FP7208B is available in the small footprint DFN-10L package to fit in space-saving PCB layout for application fields.

Features
  Wide Supply Voltage Operating Range: 2.5V to 24V
  Precision Feedback Reference Voltage: 0.1V (±2%)
  Analog and Digital Dimming Control
  Shutdown Current: < 6μA
  Internal Fixed PWM Frequency: 200KHz / FP7208
  Programmable PWM Frequency: 100KHz~1000KHz / FP7208B
  Programmable Soft Start Function (SS)
  Programmable Over Voltage Protection (OVP)
  Over Temperature Protection (OTP)
  Package: SOP-8L(EP) / FP7208, DFN-10L / FP7208B

Applications
  LED Module
  Display Backlight
  Car Lighting
  Portable LED Lighting

FP7208-升压LED驱动控制IC

描述:
    FP7208是一颗异步升压LED驱动IC,控制外部开关NMOS,输入低启动电压2.5V工作
电压4.5V,VFB 反馈电压0.2V,反馈电压低,取样电阻功率损耗也降低,整体转换效率提升。软
启动时间透过外部电容调整,LED 开路保护透过外部电阻调整;调光控制EN Pin,EN 内部有濾
波器,可以实现线性与數位调光,内置过热保护功能。

特色:
􀂾 启动电压2.5V
􀂾 工作电压范围4.5V~24V
􀂾 VFB 反馈电压0.2V
􀂾 线性与數位调光控制
􀂾 关机耗电流最大6μA
􀂾 固定工作频率300kHz
􀂾 可调软启动时间
􀂾 LED 开路保护
􀂾 过温保护
􀂾 封装SOP-8L(EP)

应用:
􀂾 LED 模块
􀂾 显示器背光
􀂾 車灯
􀂾 手持式照明

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