Answered

• LM3550: Control Charge Rate

  

  David Shumate

  Resolved

  Part Number: LM3550 Hi Team, When it comes to the charging of the cap with a LM3550, is there a way to control the charge rate? After a flash event it will be desirable for the re-charge to last as long as 1 second. Thanks! David

  • Resolved

  • over 4 years ago
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• LM3550: EOC and Flash issrue , FGATE is set to 0

  

  Chi Miao

  TI Thinks Resolved

  Part Number: LM3550 1. Super-capacitor's charge mode level is set to 5V, EOC shold become to 0 when level reached to 4.75V, but in fact, it become to 0 only when charged level above 5V, such as 5.03V charege: reg addr 0x10 val: 0x12 2. Led cant't…

  • over 4 years ago
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• LM3550: Need of Cout at Vout

  

  Menaka Srinivasan

  TI Thinks Resolved

  Part Number: LM3550 Hi, Can i know what is the functionality of Cout at Vout? What will happen If Cout is not connected to Vout, will it cause any physical damage?

  • over 5 years ago
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• LM3550: Can't Charge Issue

  

  Wu JW

  TI Thinks Resolved

  Part Number: LM3550 Hi, Team, My customer used the LM3550 as followed, they found the LM3550 can't charge the output cap. The register 0x10H can be read as 0x32, the register 0xA0 as 0xC7. There is no votage as C2,C3, C7, C8, C11. How about you suggestion…

  • over 5 years ago
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• LM3550: Can't Charge Issue

  

  Wu JW

  TI Thinks Resolved

  Part Number: LM3550 Hi, Team, My customer used the LM3550 as followed, they found the LM3550 can't charge the output cap. The register 0x10H can be read as 0x32, the register 0xA0 as 0xC7. There is no votage as C2,C3, C7, C8, C11. How about you suggestion…

  • over 5 years ago
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• LM3550: BAL pin vs no or single supercap

  

  Fred P

  TI Thinks Resolved

  Part Number: LM3550 Section 7.3.5 read as follow: The Balance pin (BAL), when connected to a super-capacitor (if needed), regulates the two sections of the super-capacitor so that voltage on either cell is equal to ½ the output voltage. What should…

  • over 6 years ago
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• LM3550: Max Flash current, limitations by IC

  

  Mikhail Zubko

  TI Thinks Resolved

  Part Number: LM3550 Hello, Flash current goes outside that IC (from Supercap, through LED, FET, Rsns), how Flash current can affect IC? Seems, if I set current to 12,5A (Rsns=8mOhm, V_FB=100mV) IC can't be damaged.

  • over 6 years ago
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• LM3550: Flash does not occur with EOC low

  

  Mikhail Zubko

  Part Number: LM3550 I use optimal charge mode, enshure that the EOC pin (with pull-up resistor) is LOW, set bit 2 in register at address 0x10 to enable Flash, but LED Flashing does not occur. When I repeat this cycle (enable Flash, wait 200ms (Flashing…

  • over 6 years ago
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• LM3550: LED used as ambient light sensor

  

  John Smith54

  TI Thinks Resolved

  Part Number: LM3550 Other Parts Discussed in Thread: LM3535 , Hi team, I am looking into circuits of LED driver ICs. I see the need of separate photo-diode which senses ambient light and provides output to ALD pin, which in turn controls brightness of the…

  • over 6 years ago
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• LM3550: Do this IC fet my needs?

  

  Paulo Carmo

  Part Number: LM3550 Good afternoon, My name is Paulo Carmo, I´m a electronic developer in MCM. My next task is develop a electronic board to driver LEDs for medical applications. The driver must provide constant corrent to several LEDs that will…

  • over 7 years ago
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