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  • LP8556: Is LP8556 able to drive 69PS LED?

    Resolved
    Part Number: LP8556 Tool/software: Dear team Lenovo tablet team want to use LP8556 to drive a 6P9S, a LED panel with 6 LED series. 69PS has the following spec, I see with 3V input, 28V output, the required current is 170mA. Is LP8556 able to drive…
    • Resolved

  • LP8556: LP8556 resets control registers to EPROM values, Flags Short and OVP in Status register 0x02

    TI Thinks Resolved
    Part Number: LP8556 Tool/software: My board seems to be worksing fine. I've got 2 LP8556SQ-E08/NOPB devices operating under I2C control that are driving my display's backlight. But, when I send my list of configs over I2C, status register 0x02 reads…

  • LP8556: i2c timing check

    Part Number: LP8556 Tool/software: Hi team, Customer is testing LP8556in their system. They find the SOC output fall time timing is faster that spec, while it match I2C public spec. Now, communication is OK, could you help check if this is OK for…

  • LP8556: Maximum output current

    TI Thinks Resolved
    Part Number: LP8556 Tool/software: Dear team, My customer is using LP8556 in quite margin state, they need Vout MAX = 21V, VIN 3.3V-4.5V, Iout per channel = 29mA, 6 channel. Based on the D/S, sometimes it mentioned: MAX iout is 50mA, but in the…
    • Answered

  • LP8556: LP8556SQ-E08/NOPB schematics

    Resolved
    Part Number: LP8556 Tool/software: Hi team We would like to use LP8556SQ-E08/NOPB for pure hardware test, no software engagement. 1. LP8556SQ-E08/NOPB is "PWM Only" without I2C master, could we directly pull pwm pin to high (VDD power domain), as 100…
    • Resolved

  • LP8556: Require LED Driver for My application

    TI Thinks Resolved
    Part Number: LP8556 Other Parts Discussed in Thread: TPS923655 Tool/software: Hi Team, We have a system with 60 white LEDs driven with a forward current of ~1.3A approx. The supply to the LED is controlled by a discrete load switch which is enabled…
    • Answered

  • LP8556: Test mode

    Resolved
    Part Number: LP8556 Tool/software: Hi, We found some LP8556 VLDO short to GND issue, Does this IC has test mode that we may configure incorrect for this IC in our device to cause damaged? Thanks! Jeff
    • Resolved
    • Answered

  • LP8556: The frequency corresponding to other RFSET value

    Resolved
    Part Number: LP8556 Tool/software: Hi team, My customer wants to set a frequency of around 400k, but there is no corresponding resistance value. Could you please give the specific frequencies corresponding to 56kΩ and 68k Ω resistors? Thank you! …
    • Resolved

  • LP8556: Current Per Channel and I2C Option for WQFN

    Part Number: LP8556 Tool/software: Hi, I am looking for an LED driver that meets the following requirements: Number of LEDs : 4 LED Forward Voltage : 22V Max Current per LED : 45mA The LP8556 appears to be a good fit for this…

  • LP8556: Confirmation on dimming ratio possible

    Part Number: LP8556 Tool/software: Hello! I'm hoping you can clarify the dimming ratio we can achieve with LP8556. I see an old thread where the "PWM dimming resolution of 15 bits" in datasheet = 12 bit dimming + 3 bits of dithering, which confused…

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