tps61500 with no PWM

Geologic SI

Other Parts Discussed in Thread: TPS61500

I would like to use tps61500 with a fixed current output and no PWM. Should i use the circuit with a capacitor C5 between DIMC and GROUND or just leave DIMC floating?

Thanks

Nuno

over 14 years ago

0 Geologic SI over 13 years ago

Prodigy 40 points

Anyone could help here please?

0 Jeff F over 13 years ago in reply to Geologic SI

TI__Guru**** 166626 points

The capacitor on the DIMC pin filters the PWM signal that is used to alter the reference voltage and therefore the LED current. If you will be using the reference at 200mV for fixed LED current without dimming, you do not need the capacitor on DIMC.

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tps61500 with no PWM