explain
There are some automotive applications that are suitable for indicator lights and LCD local dimming backlighting. For such applications, most people believe that multi-channel constant current LED drivers are required. It is required to obtain the same intensity and LED color temperature. To ensure system level security, the LED driver must be able to detect faults.
TLC6C5724-Q1 device is a 24 channel constant current RGB LED driver for vehicles, which can be used to test on this LED. The TLC6C5724-Q1 device can provide an output current of up to 50mA (set by an external resistor). The device has a 7-point correction function, and each channel outputs 2 ranges. The device also provides 8-bit intensity control for the output of each color group. The intensity of each output can be adjusted through 12 bit, 10 bit or 8 bit gray scale control.
The circuit of the device can detect various system faults, including LED fault, adjacent pin short circuit fault, reference resistor fault, etc. Pendulum rate control has 2 adjustable positions to minimize system noise. There is a time interval when the output level changes from one LED group to another. This interval helps to reduce the starting current. SDI and SDO pins allow multiple devices to be connected in series and controlled through a serial interface.
1 Characteristics
1 • Meets AEC-Q100 standards for automotive applications, with
– Device temperature class 1: - 40 ℃ to 125 ℃, TA
• 24 constant current trap output channels
– 50mA maximum output current
– 8V maximum output voltage
– Three output groups: OUTRn, OUTGn, OUTBn
• Output current adjustment
– Provide 7-point correction for each channel
– 8-bit strength control for each group
• Integrated PWM grayscale generator
– PWM dimming for each individual channel
– Adjustable global grayscale mode: 12 bit, 10 bit and 8 bit
• Protection and diagnostics
– LED open circuit detection, LED short circuit detection, output GND short
Road detection
– Short circuit detection of adjacent pins
– Warm up warning, thermal shutdown
– Detection and protection of open circuit and short circuit of IREF resistor
– For GCLK error detection and LOD_ LSD register error
Check the negative switch
– LOD_ LSD circuit self-test
• Programmable output slew rate
• Output channel group delay
• Serial data interface
2 Application
• Vehicle dashboard
• Vehicle local dimming display
• Vehicle panel
• Vehicle HVAC control panel
• Vehicle central stack display
• RGB ambient lighting in the car
• Vehicle shift by wire and transmission
