• 

  Takashi Onawa

  • 2 months ago
  • Power management
  • Power management forum

  TPS92640: Generating low output voltage

  Part Number: TPS92640 Hi team, My customer want to generate 0.8V@500mA from 48V Vin with TPS92640. Is it possible to generate such the low voltage with TPS92640? It might be OK if lower switching rate such as 60kHz is selected as Fsw to be satisfied...
• 

  Kazuya Nakai59

  • 5 months ago
  • Power management
  • Power management forum

  TPS92640: Do you have any reference design to use TPS92640 with about 400V output for many LED driving in series?

  TI Thinks Resolved

  Part Number: TPS92640 Hello guys, One of my customers is looking for a reference design which can drive many LED in series with about 400V output using TPS92640 (Buck converter type LED driver). The LED current is 150mA~300mA as type 1 and about 2A...
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  Ryo Akashi

  • 5 months ago
  • Power management
  • Power management forum

  TPS92640: start up issue with low analog dimming

  TI Thinks Resolved

  Part Number: TPS92640 Hello experts, I got question about start up with low analog dimming from customer. My customer can't start up well when they set low analog dimming. In datasheet P14, I found the discription related with proper start...
• 

  Adrian Ymeraj

  • 7 months ago
  • Power management
  • Power management forum

  TPS92640: minimum switching frequency and current limit

  • Resolved

  Part Number: TPS92640 Hi team, my customer is evaluating our device but from the datasheet it's
• 

  Kuramochi Tadahiko

  • 7 months ago
  • Power management
  • Power management forum

  TPS92640: RF

  • Resolved

  Part Number: TPS92640 Hi, What is role of following RF? How should we decide the value
• 

  Irwin Nederbragt

  • 2 months ago
  • Power management
  • Power management forum

  RE: TPS92512: The multi-channei TPS92512 LED drive analog dinmer output current is inconsistent

  Hello, The accuracy at Viadj = 1.2 volts gives +/-5%. As you adjust iadj down the error gets worse because this is an offset in the error amplifier. At Viadj set to 0.18V the tolerance becomes -29% to +33%. You will find this to be true with most LED...
• 

  Irwin Nederbragt

  • 1 month ago
  • Power management
  • Power management forum

  RE: Halogen Bulb dimmer

  Hello, What is the input voltage range? 12V, 100W halogen bulb run from 12Vdc limits the topology of the design. What dimming method are you interested in? Analog, PWM or both? You can look at the TPS92640/641 which is a buck converter. The LM3409...
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  Irwin Nederbragt

  • 3 months ago
  • Power management
  • Power management forum

  RE: TPS92515HV: LED current accuracy

  Hello Gene, This part is not designed for tight current accuracy. I would look at using the TPS92640/641 for this. If they are planning on dimming at 4 KHz, 1000:1 I assume they plan to use shunt FET dimming? Best Regards, Irwin
• 

  Kazuya Nakai59

  • 3 months ago
  • Power management
  • Power management forum

  RE: TPS92511: Is there any way to improve TPS92511 output current accuracy?

  Hello Irwin, Thank you very much for your reply. I will tell them to use a higher accuracy resister for Iadj resistor. I know TPS92640/641 is a device which has good current accuracy. But the device price is higher than their target. Their price...
• 

  Eric Shen42

  • over 1 year ago
  • Power management
  • Power management forum

  TPS92640: TPS92640 UDIM Schottky diode

  TI Thinks Resolved

  Part Number: TPS92640 Dear TI Team: What is the function of the Schottky diode connected with UDIM? Thanks! Regards! Eric Shen

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