Part Number: LP8868Z-Q1 I'm working on bringing up an LP8868Z-Q1 in the buck configuration. I'm seeing the internal VCC LDO rail increase with the dimming control input voltage. My LED is on- but extremely dim, and the driver is not switching. My power…
Part Number: LP8868Z-Q1 Hi,
I am designing an LED driver circuit intended to support LED loads ranging from 15-27 V. I’d like to be able to use flexible dimming to adjust the output current anywhere from 0-3A. Could you please review my design? The…
Part Number: LP8868Z-Q1 Other Parts Discussed in Thread: TPS922055DMTREVM Tool/software: Hi Teams,
The customer plans to evaluate LP8868Z-Q1 and TPS922055DMTR. Can you provide the efficiency of the IC at 12V input and 1.35A output? The customer will…
Part Number: LP8868Z-Q1 Tool/software: Hi Zhqian,
Customer found some strange operating when VIN voltage is going up.
Please check it out and explain it if it is not normal operation.
VCSEL 1EA (@ On Time 2ms, ILED=4A )
current ( Green)…
Part Number: LP8868Z-Q1 Tool/software: Hi Zhiqian,
Please review the schematic with single Vcsel LED.
Samsung changed from dual IR LED to single Vcsel LED due to single LED open protection.
They need to make sure C12 for and R2 & R3 value for…
Part Number: LP8868Z-Q1 Tool/software: My purpose is to reserve the UVP pin float and still detect the LED open load and short circuit. Is it possible?
After I measured，When the UVP pin is in the float state, the Fault can still detect the LED open…
Part Number: LP8868Z-Q1 Other Parts Discussed in Thread: LP8868X-Q1 Tool/software: Hello expert,
May I know if LP8868x-Q1 supports ASIL-B? If no, do we have functional safety related document for it? Thanks a lot!
Best regards,
Ann Lien
Part Number: LP8868Z-Q1 Tool/software: At the bottom of section 8.2.3.2.1 last paragraph it states "ILED = 2A, consider the efficiency as 0.9" and lists the Inductor Current Max of 0.741A
Where and how did we come up with this value of 0.741Amps for…
Part Number: LP8868Z-Q1 Hi
We are using the LED driver to control a LED lamp with different output power levels.
The power levels ar controlled by dimming the driver in analog dimming mode.
When the led lamp is turned on we enable the driver by…
Part Number: LP8868Z-Q1 Tool/software: What are the requirements for Ruvp1 and Ruvp2？Can I use Ruvp1=200Kohm and Ruvp2=1Mohm？
If the internal LDO drives the UVP pin, the Ruvp2=1Mohm resistance is selected, 5V/1MΩ=5uA>1uA is satisfied leakage current…
