Part Number: LM3549 Tool/software: Hi,
1) LM3549 exposed thermal pad should be connected to ground ?
2) Is the HTAB pin in the LM3549 evulation kit the same as the exposed thermal pad ?
Part Number: LM3549 Tool/software: Hi Team
About LCoS design , we plan to use LM3549 for LCoS R/G/B LED control,
the question is :
R/G/B LED duty signal from LCoS panel and connect to LM3549 R/G/B enable pin.
at this time , how to design PWM pin ? pull…
Part Number: LM3549 Hi Team,
below are several questions on LM3549
1. for brightness control, if just use I2C register, then can PWM pin be floating? we can ignore the PWM input signal at this time, right?
2. is there power sequence requirement between…
Part Number: LM3549 Other Parts Discussed in Thread: LP55281 , Hi Team,
Do we have RGB color sequential driver solution with SPI control and support buck boost to reduce LED headroom?
Like LM3549 but use SPI communication. Also, customer need to separate…
Part Number: LM3549 Dear Sir/Ms.
I don’t have LM3549EVM for comparison. I would like to ask, are the following waveforms normal? The customer seems to be a large sawtooth wave. The customer changed L2 2.2uH to 4.7uH. The waveform is not change. …
Part Number: LM3549 Reg 0x14
Enables soft start feature and selects soft start time.
What is the purpose of the Soft Start feature? Why would I want a short Soft Start time? Why would I want to have any Soft Start time?
How does this effect the performace…
Part Number: LM3549 Reg 40h EEPROM CONTROL
When Reg 0x40 is set to 0x04 does the PROM get set with the default register values or does it clear the EEPROM (all zero/ones)?
Regards,
William
Part Number: LM3549 When I enable the chip (EN=H) how long must I wait for the chip to come alive? (How long does it take to get to Standby?)
How do I know when the part is ready for use? (EEPROM-> reg is complete,... I can now enable an LED)
Regards…
Part Number: LM3549 Dear Sir/Ms.
How much time has passed after Power on can I2C Command be given to LM3549? How much time has passed after R/G/B Enablae can I2C Command be sent to LM3549? My customer used the polling method to issue I2C commands, and then…
Part Number: LM3549 Reg 0x15
ILIMIT register sets the buck-boost converters current limit values.
The datasheet makes no mention of the use of these values? i.e. Why would I limit the current to 2Amps when the part can only deliver 700mA max?
Please advise…