Part Number: LP55231 Other Parts Discussed in Thread: LP5813 , LP5861 , LP5018 Hello,
I am using two LP55231 to control 6 RGB LEDs.
When I turn on all LEDs with max brightness, both ICs heat up to more than 80 degrees celsius. I stopped the testing…
Part Number: LP55231 Hello,
LP55231 chip on our board does not reply to the very first I2C access after the powerup. Our initialization sequence is as follows:
Turn on the power
Pull EN pin high
Delay 500uS
Write 0x0040 (CHIP_EN high) to…
Part Number: LP55231 Other Parts Discussed in Thread: LP5009
Hi all,
We've been experiencing an issue with LP55231 chips, on at least 5% of boards now. In two instances, SCL has been found shorted to GND. In another instance, SDA and SCL were found…
Part Number: LP55231 Hi all
My customer is working on a design with the LP55231SQX/NOPB and they have this question:
Is it ok to use 1uF 10V for the flying capacitors ?
This will help them reduce the BOM lines for their assembly.
The datasheet…
Part Number: LP55231SQEVM Other Parts Discussed in Thread: LP55231 Hi,
We are using two LP55231 to drive 4 RGB LEDs, each chip is driving two LEDs respectively.
Below is the configuration:
1) LP55231 is configured to use internal clock
2) Using…
Part Number: LP55231 Hello,
I asked about I2C communication when writing 0xFF to the reset register in the thread below.
As a matter of fact, the initialization process works normally with the following procedure. 1) EN to low. 2) Write 0xFF to the…
Part Number: LP55231 Hi Team,
I read the datasheet of LP55231. It only specifies the Maximum clock speed, 400 kHz, but not the minimum. Do you know the Minimum clock speed required for the I2C interface?
Best Regards, Tom
Part Number: LP55231 Hi all,
The datasheet for LP55231 indicates there is over-current and short-circuit protection with LED error detection, but does not elaborate on whether keeping those outputs floating would be OK. I assume grounding these unused…
Other Parts Discussed in Thread: LP55231 Hi Ti Team,
I loaded led pattern in LP55231 led driver ic. logic pattern array given below.
0084 9C00 40FF 7e00 4000 7E00, A101, 0041 9C00 9C88 18FF 19FF A202
0084 led mapping is working but 0041 led mapping…
Part Number: LP55231 Hey
I'm writing some programs for the LP55231 engines to create the following effect:
That is, all the RED leds are constantly on and the green LEDs chase each other with LED N fading out as LED N+1 fades in.
The array…
