This LED Lamp Driver-IC is an IC that drives the rear lamp of a car composed of STOP lamp, TAIL lamp, direction indicator lamp and back lamp. The external power FET of the DC-DC converter and the n-channel FET of the built-in 8-channel linear regulator can be controlled simultaneously, and the current of each channel can be driven simultaneously up to 200mA.
There are two ways to adjust the channel current. The first method is to use the programmable memory built in to set the PWM duty of the individual channels and this method can greatly reduce the development time for adjusting the target LED current since the channel current is not modified by the external circuit components. The second method is to adjust the channel current by an external current sense resistor.
The LED detects the abnormal state that the connection is open or short by channel. At this time, the IC becomes protected and the abnormal state is warned through the output pin which informs the outside of the state.
In addition, the turn-on time of the 8-channel linear regulator can be adjusted via the built-in programmable memory. Through this, the sequential lighting of the channel can be easily implemented without a separate MCU.
This IC can also be applied to the daylight running lamp (DRL), fog lamp and direction indicator lamp of the front lamp, depending on the application situation.
Rear-side/Interior LED Lamp Driver IC