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  • LP8556: Backlight brightness is not stable for lp8556

    Resolved
    Part Number: LP8556 Hi everyone I am using LP8556,Set A1h to 0x9D both uefi and kernel,but during the boot process, the backlight is relatively bright in the UEFI stage and darkens in the Kernel stage. Can you give me some advice? Best Regards,
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  • LP8556: How to use LP8556

    Resolved
    Part Number: LP8556 Hi, I am considering using the LP8556 device. The specifications are as follows. ORDERABLE DEVICE : LP8556SQE-E08/NOPB (specification) VIN:5V LED voltage:10V-14V LED current:30mA Number of ch:4ch (question 1) At the beginning of the data sheet…
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  • LP8556: reference description for BRT_MODE, Brightness control(BRT[7:0]

    TI Thinks Resolved
    Part Number: LP8556 Hello, Can I have additional descriptions about how to utilize BRT[7:0] register? I'm a bit confused from BRT_MODE table. understood that the PWM output is controlled by the PWM input duty cycle and the Brightness register. however…

  • LP8556: Need clarification of the output voltage range on this part

    TI Thinks Resolved
    Part Number: LP8556 Hello, I am looking at the LP8556 LED driver. I was looking at the specifications and saw that the output voltage range is 7V-48V. When I looked that this parts datasheet it stats increments of boost output voltage. This table is on…
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  • LP8556: Obscure driver headroom voltage dependence

    Resolved
    Part Number: LP8556 Hi, team, LP8556-E08 in my device powers two LED strings in 2-phase 6-drivers configuration with BRT_MODE=11b. Max current of each string of 125mA is required, therefore I set CURRENT_MAX=50mA, CURRENT_MSB_LSB=D54h (D54/FFF*50mA~125mA…
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  • LP8556: Register Setting for boost voltage from 12V to 24V

    Resolved
    Part Number: LP8556 Hi Teams, Now I'm trying to use LP8556-E02 for boost voltage from 12V to 24V. But I set some register setting, the VBOOST(output) is still 12V. Reg : value [0xA9] : 0xA0 [0x9E] : 0x00 Some information for my using shows below…
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  • LP8556: LP8556 PWM only

    TI Thinks Resolved
    Part Number: LP8556 Hi, I was going through the datasheet and would like to use the WQFN version of LP8556(LP8556SQ-E09/NOPB). But as per the attachment, all WQFN packages belong to PWM only. Does this mean none of the WQFN packages have I2C control…
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  • LP8556: I can’t tell if the output is pulsed even when controlling the level by I2c

    Resolved
    Part Number: LP8556 Other Parts Discussed in Thread: TPS61169 Hello TI support, I have been researching multiple backlight LED drivers for controlling a string of LEDS. For example 6 LEDS per channel. I need the LEDs to be turned on at a steady current…
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    • Answered

  • LP8556: LP8556SQE-E09 BOOST Output 43V feasibility

    Resolved
    Part Number: LP8556 We are using the "LP8556SQE-E09" LED backlight driver on our LED driving board. We want to use it to drive a light bar configuration that require 43V BOOST Output and 23mA max LED current for each of the 6 channels. Estimate…
    • Resolved

  • A1h for lp8556

    TI Thinks Resolved
    Hi everyone I set the default value of A1h to 0xAD.now,I've defined a node to change the value of A1h to change the current.After starting up, the value of A1H was changed to 0xCD by the node, and the current was found to be unchanged Best Regards…

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