Hi Yuting,
The STATUS register reported value is 0x80 under this connection, we are using below register configuration for LP8557, after enabling the backlight, LEDs will be flashing one time and then reported 0x80 value in register 0x01h. Please help…
Part Number: LP8557 Team,
Can the LED outputs be connected in parallel?
The max current through a single channel is 25 mA. Our LCD backlight requires 40mA. My thought is if the LED string was fed into channel 1 and 2, then there would be 50mA. Then the…
Part Number: LP8557 Hello,
I have two question regarding the LP8557 PWM only version:
1. From my understanding, SHUTDOWN mode is when there is no voltage applied to VDD and STANDBY mode occurs when the PWM pin is low after 52ms.
When VDD voltage is applied…
Other Parts Discussed in Thread: LP8557 , LP8555 Hi Sir,
There is only one I2C interface on the system, but I need control more than 10 channel LED.
May I connect 2 or 3 LP8557's I2C interface in serial? Does LP85571's I2C address could be changed?…
Part Number: LP8555 Other Parts Discussed in Thread: LP8557 , The Configuration of the Device we are designing contain 4 separate LED Drivers (LP8555*3, LP8557*1 all from TI). We need to Control all 4 LED Drivers from the same Control Chip through I2C interface…
Other Parts Discussed in Thread: LP8557 Hi,
If use LP8557, how to connect the CABC trace from panel ?
If use LP8557I, how to connect the CABC trace from panel ?
Thanks
Other Parts Discussed in Thread: LP8557 Hi.
My customer use Driver to regulate LP8557.
The driver code has {0x16, 0x60}.
What's the function of address 0x16 setting? Datasheet doesn't mention that register.
Thanks
Daniel
Other Parts Discussed in Thread: LP8557 Hi
If my coustomer want to use the only PWM dimming.
In this case they need to be set using the I2C BRTMODE=00 ?
Because of default is BRTMODE=11b.
Or may I enter the PWM directly to the FSET pin ?(Dont need the set…