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Battery Management, LED Driver ICs

Hi!

I’m hoping you can help me...

I am looking to develop a new bike light, but need help determining which components to use. The choices are overwhelming!

I realize that you are primarily an IC company, but I wanted to give you the full spec, so you can get a feel for what I am trying to do. Any recommendations as to components would be highly appreciated!!!

I have a 6V/40mA solar panel, which I am currently using to charge a single 3.7V/1200mAh Li-Ion battery. The panel works great, but I have no battery management, overcharge protection, etc. Then, I am looking to drive one or more LEDs that can provide a great combination of brightness/lumens/mcds with long battery life. Finally, an LED Drivers is needed to provide power management for High, Low & Flashing settings.

Block Diagram:

6V/40mA solar panel

          |

Battery Management IC (needed)

          |

3.7V/1200mAh Li-Ion Battery

          |

LED Driver IC (needed)

          |

LEDs (needed)

Please let me know if there is any other information I can provide.

Thanks!

Rob.

Parents
  • Hi Rob,

    For the blinking oscillator, I think you could do a couple of things:

         1.  Simple 555 timer.  There's lots of choice and info on the web for doing this.

         2.  A simple RC oscillator constructed from an op amp (ADCMP370 would be a good choice).

              http://en.wikipedia.org/wiki/Relaxation_oscillator

         3.  TS3004/5. I haven't used the part or heard of the company before, but it seems like a very compact oscillator and PWM generator.  A few levels better than the 555, and with fewer components.  The FOUT could be put into the ADD5205 EN for blinking.  And the PWMout could be connected to the ADD5205 PWM input and used to DIM the LEDs from 100%-0%, if desired.

    Best Regards,

      - Jon

Reply
  • Hi Rob,

    For the blinking oscillator, I think you could do a couple of things:

         1.  Simple 555 timer.  There's lots of choice and info on the web for doing this.

         2.  A simple RC oscillator constructed from an op amp (ADCMP370 would be a good choice).

              http://en.wikipedia.org/wiki/Relaxation_oscillator

         3.  TS3004/5. I haven't used the part or heard of the company before, but it seems like a very compact oscillator and PWM generator.  A few levels better than the 555, and with fewer components.  The FOUT could be put into the ADD5205 EN for blinking.  And the PWMout could be connected to the ADD5205 PWM input and used to DIM the LEDs from 100%-0%, if desired.

    Best Regards,

      - Jon

Children
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