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Eval board for LM3556 1.5A synchronous boost LED flash driver

Posted: 12 Oct 2012     Print Version  Bookmark and Share

Keywords:LED driver  interface  jumpers 

To operate the LM3556 1.5A single flash LED driver system with I2C compatible interface, the following jumpers will have to be connected.

Jumper 1: This in shown in Figure 1 as 1. This connects the LED to the part. If this jumper is not present, the part will run into an OVP fault.

Jumper 2: This is shown in Figure 1 as 2. This connects the inductor to the supply voltage to make sure the part is able to switch during the boost phase. This also hooks in the bypass capacitor at the input to the supply voltage. The part should never be allowed to turn on without this jumper.

Jumper 3: This is shown in Figure 1 as 3. This pulls up the SDA and SCL voltages to either be 3.3V or the supply voltage (Vin).

Jumper 4: This is shown in Figure 1 as 4. This pulls the Enable pin in the part to the supply voltage.

View the PDF document for more information.

Originally published by Texas Instruments at as "LM3556 1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Source Evaluation Board".

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