Other Parts Discussed in Thread: TPS92641
Tool/software:
This is a request from ongoing case CS2401818.
For our experiments it is necessary to
- Control Frequency of the LED switching on and off(varying frequency from Khz - Mhz range)
- Control the current passing through the LED and hence the brightness.
Below are the kind of waveforms we want
In the datasheet of TPS92365xEVM
The LED current gradually increases followed by gradually decreasing.
We want the LED to be instantaneously on and off.
From what we understand in there are 3 pins controlling type of dimming and frequency
PWM/EN
ADIM/HD
SW
In PWM dimming
PWM/EN - PWM signal
ADIM/HD - high
SW - controlled by RFset
We want to know which pin controls switching on and off the LED ?
Basically what does pin PWM/EN, SW exactly do?
Similarly in analog dimming
What does pin ADIM/HD, SW exactly do?
Also can we control the LED turning on and off by using a
function generator at the PWM/EN, ADIM/HD pins?
We understand from previous conversations that the components in a given EVM board are fixed and altering the components can void the warranty.
Therefore can we have an empty post at Rfset where we can put our desired value of resistor to control the frequency of turning on and off the LED.
Summary (please read this)
for our experiments it is necessary that
we control the frequency of turning on and off(instantaneously) the led(varying khz - mhz range)
(current through led should be like square pulse - on and off)
different currents flowing through led
also please clearly explain the functions of the pins pwm/en,adim/hd,sw?(which pin controls the led on and off, what is the function of other pins)
using your ic,evm board can we achieve the above
If not , please suggest if we can use any other ic, methods?
