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TLC59711: Driving higher current LEDS

TI-CSC
Genius 10885 points
Part Number: TLC59711

Hello E2E Experts,

Good day.

A quick question: Say I got high current LEDs which I wish to control using this device, is there some way to bypass its maximum 60mA current per channel? For example, let the device control a FET and have that FET control the LED?

We are looking to drive LEDs with currents of up to 200mA but to do it using a multi-channel driver like this device.  I was looking for an electrical idea to enable this device to control more current for each led channel. 

Thank you in advance for your support.

Regards,

CSC

  • 0
    TI__Mastermind 19015 points

    Hello CSC,

    Using FETs may help, with resistors converting current signals to voltage signals in order to control Vgs. However, the resistors are energy-consuming. Thus this is not recommended.

    Instead, as is mentioned in the datasheet, multiple outputs can be configured in parallel to increase the constant-current capability. For example, the OUTR0, OUTR1, OUTR2, OUTR3 can be connected together to provide a total current-sinking capability of up to 240mA. 

    However, this will reduce the number of available channels a device can provide. You can tell me the needed channel number and I will try to make an advice.

    Best Regards,

    Steven Li