• LM3445: Destruction of NFET when used with LM3445

  

  Benny Smith

  TI Thinks Resolved

  Part Number: LM3445 When applied as outlined in the LM3445 Data Sheet and Application Note, the resulting circuit is susceptible to failures of the main switching NFET. The FET becomes shorted at all terminals and the obviously high-voltage event that…

  • over 1 year ago
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• LM3445: Min Ton of LM3445

  

  gz wu

  TI Thinks Resolved

  Part Number: LM3445 Hi, I find there is a minimum on-time(about 200ns) for the LM3445.Min Ton matter means we have worse line regulation spec when TRIAC level is min. Because Min ton is fix,LED voltage tolerance also effect min Iout.How to achieve constant…

  • over 2 years ago
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• RE: LM3445: questions about LM3445

  

  Irwin Nederbragt

  Hello, The high impedance, DC wise, is FLTR2 so I would place the NPN close to the FLTR2 pin and make sure the ground return is near the IC and FLTR2 capacitor. Best Regards,

  • over 3 years ago
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Answered

• LM3445: The LED lighting design question

  

  Paul Yeh

  Resolved

  Part Number: LM3445 Hi team, My customer would like to design searchlight equipment and they think LM3445 should be possible candidate. The specification they need are 1. Vin=90Vac~264Vac 2. Vout <40Vdc (LED number is not confirmed) 3. Iled <700mA…

  • Resolved

  • over 2 years ago
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• LM3445: Line Regulation improve solution

  

  gz wu

  TI Thinks Resolved

  Part Number: LM3445 Hi, We have a High PF flyback triac dimmable project,and we are going to use LM3445.I want to design the driver refer to AN-2034. But the Line regulation is not good.Do you have improve solution? Thank you! B/R

  • over 2 years ago
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• LM3445: OVP circuit

  

  gz wu

  TI Thinks Resolved

  Part Number: LM3445 Dear all: I find two OVP circuit for LM3445 here. My colleague want to find a simpler OVP solution.Is there any other simpler OVP solution? Thanks!

  • over 2 years ago
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• LM3445: Bleeder circuit position

  

  gz wu

  TI Thinks Resolved

  Part Number: LM3445 Hi: I want to move bleeder circuit to the front of bridge diodes. Does it work well? B/R

  • over 2 years ago
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• LM3445: Suitable device to control current value

  

  Kuan Wei Chen (Kevin Chen)

  TI Thinks Resolved

  Part Number: LM3445 Dear Team, Here is Kevin from the Delta Taiwan team. The customer is looking for a suitable LED controller, not sure if we have a suitable device Vin: 150Vdc ~ 180Vdc, Vout: 121Vdc ~ 45Vdc Iout = 0 A~ 3.2 A with 2% tolerance (The current…

  • over 2 years ago
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• LM3445: LM3445 Flyback

  

  Fabrizio utente3

  TI Thinks Resolved

  Part Number: LM3445 Other Parts Discussed in Thread: TPS92314A , LM3447 Hi, my name is Fabrizio and I'm interested in LM3445 as led driver in flyback configuration. I can't find any calculation tool or excel sheet. Can you help me?

  • over 4 years ago
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• LM3445: Low dim level issue using LM3445

  

  Wade Novin

  TI Thinks Resolved

  Part Number: LM3445 I am using the LM3445 in accordance with the application note SNVS570M At low dim levels the buck converter transitions from regulating the current to constant on state of the switching transistor. From the application note: As the…

  • over 3 years ago
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