FP1209-异步升压LED驱动IC

FP1209-异步升压LED驱动IC

FP1209元件值计算

一般描述:

FP1209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2.8V，工作电压5V，VFB反馈电压0.25V，反馈电压低，取样电阻功率损耗也降低，整体转换效率提升。内建软启动功能，LED开路保护透过外部电阻调整；调光控制DIMPin，DIM内部有滤波器，可以实现线性与数字调光；有过电流保护，避免开关NMOS电流过大造成损坏；内置过热保护功能。

特色:

➢启动电压2.8V

➢工作电压范围5V~24V

➢VFB反馈电压0.25V

➢线性与数字调光控制

➢关机耗电流最大6μA

➢固定工作频率150kHz

➢LED开路保护(OVP)

➢开关NMOS过电流保护(OCP)

➢过热降LED电流保护

➢过温保护(OTP)

➢封装SOP-8L(EP)

应用范围:

➢LED模块

➢显示器背光

➢车灯

➢手持式照明

General Description
The FP1209 is boost topology switching regulator for LED driver. It provides built-in gate driver pin for driving external N-MOSFET. The non-inverting input of error amplifier connects to a 0.25V reference voltage. It has fixed soft start time and switching frequency. There are two functions to protect system circuit like OVP and OCP. The LED current can be adjusted by an external signal connecting to the DIM pin. DIM pin accepts either a DC voltage or a PWM signal. The PWM signal filter components are contained within the chip. Current mode control and external compensation network make is easy and flexible to stabilize the system.
The FP1209 is available in the small footprint SOP-8L(EP) packages to fit in space-saving PCB layout for application fields.

Features
 Start-up Voltage: 2.8V
 Wide Supply Voltage Operating Range: 5V to 24V
 Precision Feedback Reference Voltage: 0.25V (Max.)
 Analog and Digital Dimming Control
 Shutdown Current: 6μA (Max.)
 Internal Fixed PWM frequency: 150KHz
 Internal Soft Start Function
 Output Over Voltage Protection (OVP)
 Switching MOSFET Over Current Protection (OCP)
 Over Temperature Protection (OTP)
 Package: SOP-8L(EP)

Applications
 LED Module
 Display Backlight
 Car Lighting
 Portable LED Lighting