CX5816 LED driver IC

Features

1 4 stages dimming function with ordinary switch

2 ypical 5% output Current Accuracy

3 Constant frequency start-up mode accelerate start-up process

4 EliminatesOpto-coupler and TL431

5 Built-in Short Circuit Protection, VDD Over Voltage Protection

6 Cycle-by-Cycle Current Limiting

7 VDD Under Voltage Lockout with Hysteresis (UVLO)

8 Small SOT23-5 Package

Application

LED lampion

LED bulb ( E14,E27 etc)

LED bedlamp

General Description

The CX5816 is a high performance AC/DC on/off LED driver with four-stages dimming. It uses PFM method to build DCM fly-back power supplies. It operates in primary-side sensing and regulation while removing the need of secondary feedback circuitry. The device operates in PFM in CC mode and ON-OFF in CV mode. The CX5816 has a four-stages dimming function. That means the output current will be adjusted to 100% when the first time power on corresponding to the first stage, 55% when the second time power on corresponding to the second stage, 25% when the third time power on corresponding to the third stage and 10% when the fourth time power on corresponding to the fourth stage. The cycle will restart to stage-one again when the fifth time power on. So this cycle will go on if the power off time is no more than 0.8 seconds.

Typical Application