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Replies: 4
Views: 119
Part Number: LP5024
Hi Expert,
Customer found the issue of LED current overshoot.
Could you please let me know the cause of this issue?
If it is from oscillation by parasitic inductance and capacitance. Can the customer use RC filter for OUT pins?
Do you have any idea for the improvement?
Zoom in
GND current
Thanks
Muk
Hi Yusuke,
The parasitic inductance is the main reason. Try to reduce the wire length from VLED to channel.
How do you add RC filters? Please give me a schematic to clarify the concrete position.
In my opinion, a resister in series with LED may improve the oscillation. However, the resistor will add the addition loss.
Thanks and best regards, Charles Chen Applications Engineer | LED Drivers
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In reply to Charles-Chen:
Hi Chen-san
Thank you for your support.
>How do you add RC filters? Please give me a schematic to clarify the concrete position.
Please refer below,
In reply to Yusuke Mukuno:
Re-attached
The additional capacitor will affect the on and off speed of channel. Pay attention to this.