LOWPOWER(微源半导体)Китай

The LP3354 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 feedback voltage, the error amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. Also, the feedback voltage can be programed by IIC interface.Otherwise, The LP3354 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 LP3354 is available in a space saving SOP-10 (1mm pitch) and DFN-10 (0.5mm pitch) package.