• LM3643: Are SDA/SCL open drain or push-pull?

  

  Hardy Xue

  TI Thinks Resolved

  Part Number: LM3643 Hi Team, 1. Are SDA/SCL in LM3643 an open drain? 2. If I2C is floating first then power in and EN turn on, does it have any concern? 3. If power in and EN turn on first then I2C floating, does it have any concern? Best regards, Ha…

  • over 3 years ago
  • Power management
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Answered

• LM3643: LM3643 OVP question when Vin is about 5-5.5V.

  

  GW

  Resolved

  Part Number: LM3643 Hi, Team LM3643 datasheet says it's recommend Vin range is from 2.5V-5.5V. But datasheet also shows that, it have the OVP function for 5V(ON threshold=5V,OFF threshold=4.88V). that means if we using 5V or 5.2V for Vin , it will…

  • Resolved

  • over 4 years ago
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Answered

• LM3643: STROBEN PIN minimum pulse with limit

  

  Allen Gao

  Resolved

  Part Number: LM3643 Hi team, I didn't find the spec of minimum pulse with of LED control pin STROBEN. Do we have some data of it ? A link or a datasheet? Thanks!

  • Resolved

  • over 4 years ago
  • Power management
  • Power management forum
Answered

• LM3643: NTC B value

  

  Mike Yu

  Resolved

  Part Number: LM3643 Hi Team, Is any concern for the B value of the NTC resistor? Currently, the customer are using V company resistor and its B value is 3729K. The customer want to know whether P company resistor will be acceptable with the B value up…

  • Resolved

  • over 4 years ago
  • Power management
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Answered

• LM3643: Dimming LEDs

  

  Ambroise Suter

  Resolved

  Part Number: LM3643 Hello, What would be the simplest solution to gradually dim an LED when switching from one LED to the other one? Can you provide code for the essential function? I would assume a for-loop with Torch Brightness Register (0x05) / (0x06)…

  • Resolved

  • over 4 years ago
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  • Power management forum
Answered

• LM3643: Life time of LM3643

  

  Kelly Wang

  Resolved

  Part Number: LM3643 I am using LM3643 to drive one LED only. LED connects to LED1. The current is set to 725mA. It is used in strobe mode. The strobe signal is pulse of 30Hz, duty cycle 50%. The application drive this LED in 30Hz with 50% mode for at…

  • Resolved

  • over 5 years ago
  • Power management
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Answered

• LM3643: LED 3A surge current

  

  Mike Yu

  Resolved

  Part Number: LM3643 Other Parts Discussed in Thread: LM3463 , , TPS92641 Hi Team, The customer is going to connect the output LED1 and LED2 together, but the surge current of the LED is up to 3A (tp=<800us). Can LM3463 support 3A surge current? Thank…

  • Resolved

  • over 4 years ago
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• WEBENCH® Tools/LM3643: LM3643

  

  Alex Mathew1

  TI Thinks Resolved

  Part Number: LM3643 Tool/software: WEBENCH® Design Tools Can i get the documents regarding the input current requirements of LM3643 when the output flash current and flash time varies?

  • over 5 years ago
  • Power management
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Answered

• LM3644EVM: Can i get a Sample code?

  

  Kangyeol Lee

  Resolved

  Part Number: LM3644EVM Other Parts Discussed in Thread: LM3643 , USB2ANY , LP5812 , LM3644 Tool/software: I want to control LM3644EVM by writing code directly in c++. Can I get the sample code?

  • Resolved

  • 3 months ago
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Answered

• LM3643: Difference between the LM3643 and LM3644

  

  Jeff Coletti

  Resolved

  Part Number: LM3643 Other Parts Discussed in Thread: LM3644 Hi All My customer an I are trying to figure out the differences between the LM3643 and LM3644. Data sheet are not exactly giving a clear picture. Regards Jeff Coletti

  • Resolved

  • over 5 years ago
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