Reference design for a pulse width modulation (PWM) based mostly dimming LED driver for entrance or tail LED lights of a car.
Electrical autos run on batteries and subsequently the system engineers attempt to optimize each system to cut back vitality consumption. Due to this fact, it is very important optimise the ability consumption of each system together with the tail and entrance lights. So, if you wish to have management over the depth and brightness and energy consumption of your LED gentle then this reference design will enable you do exactly that.
The TIDA-01183 by TI is a reference design that permits you to utilise PWM to dim an automotive entrance or tail gentle with a precision of greater than 2% responsibility cycle. The reference design doesn’t requires a microcontroller which reduces each the price and complexity of the design. The reference design can straight be powered by the 12-volt automotive battery and works on the full vary of automotive battery circumstances from 5V (simulating a chilly crank) to 18V. This reference design is able to operating a string of as much as 12 LEDs and affords output safety towards short-to-battery and GND voltage. The block diagram of the reference design is proven within the picture under:
The reference design employs a TPS92691-Q1 multi-topology LED driver in enhance and boost-to-battery configuration to manage the LEDs and the TLC555-Q1 LinCMOS timer along with the OPA2377-Q1 operational amplifier to measure and generate the correct PWM sign by making use of a suggestions loop and a precision shunt regulator for setting the correct responsibility cycle. The design contains key peripherals like electromagnetic interference (EMI) and electromagnetic compatibility (EMC) filtering-voltage-conditioning (shunt regulator), precision clock technology, and LED drive.
TI has examined this reference design. It comes with complete software program, firmware libraries, instruments, battery, and many others. Yow will discover further knowledge in regards to the reference design on the corporate’s web site. To learn extra about this reference design click on right here.