微源半导体 LP3351SOF LED驱动器芯片
General Description
LP3351 is a cost effective LED driver optimized for LCD monitor and LCD TV backlighting application. It provides a high performance LED backlight solution with minimized bill of material count.The LP3351 contains a PWM boost driver which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 0.21V, the error amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.Otherwise, The LP3351 offers external frequency PWM dimming method for a wide range of dimming control.Other features include over current protection (OCP), output over voltage protection (OVP), andunder-voltage lockout (UVLO). The LP3351 is available in a space saving SOP-8 (0.5mm pitch) package.
Features
◆ Wide VIN Range: 8V to 28V
◆ Current-Mode PWM Controller
◆ External PWM Dimming Mode
◆ Under-Voltage Lockout
◆ Over Voltage Protection
◆ Over Current Protection
◆ Under-Voltage Protection
◆ Over-Temperature Protection
◆ Available in SOP-8
◆ RoHS Compliant and Halogen Free
◆ Pb-Free Package
Applications
◆ TFT LCD TV
◆ TFT LCD Monitor
◆ Flat Panel Display