Part Number: LP8555 Hi Team
I am wondering about the SDA pin pull-up to VDDIO in the datasheet. What is the meaning of that drawing?
Did we really need to add that resister in I2C control mode? I saw the schematics on EVM didn't add that resister.…
Part Number: LP8555 Other Parts Discussed in Thread: , LM3697EVM Hi,
We are evaluating the feasibility of using LP8555 to drive two LED bars on Channel A and Channel B, each with different number of LED's.
For our design, we need to keep the brightness…
Part Number: LP8555 Hi
I am using a LP8555 to driver 2 LED bars, LED bar informatin as below picture.
1)String LEDA6 will have longer trace than other 5 strings in port A. So the Vf will be a little higher than others.
What is the max delta value between…
Part Number: LP8555 Other Parts Discussed in Thread: TPS61169 Hi team,
Can I connect VOUT_A to not only LEDA1~6 but also LEDB1~6? (only use one boost component like L and diode)
Or do you have other suggestion to fulfill below spec? if single channel…
Other Parts Discussed in Thread: LP8555 I bought a LP8555 evaluation board and now don't know how to use it.
1 : connection--J5,J11,J4(PIN2,3) have jump caps. I connect an external 5V to J7. LED+ is connected to boostA and LED- is connected to LEDA1…
Hi,
Multi channels device is a better choice for balanced forward current of every string. LP8555 has 12 channles and the output voltage is up to 28V.
LP8867, TPS61196 have 6 channels and each channel can support 14 LEDs/150mA.
BR,
Robin
Hi Ameenu,
You don't have to connect resistor in series because LP8555's current sink max. headroom voltage can up to be 50V, which means the extra voltage (7V-3.5V) will be hold by current sink.
BR,
Robin