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Part Number: TPS61046
Hi TI Experts,
We are developing a boost converter circuit using TPS61046 which powers an OLED display. Refer below circuit for reference. We observed that as soon as EN is driving high, inrush current draws by TPS61046 can go as high as 560mA. We would like to know if this is the typical inrush current rating we are expecting? Is there any way to restrict the inrush current, as we would like to reduce it to about 200mA? By means of experiment, we tried to modify the inductor value by changing its value from 10uH to 1uH, the inrush current can be limited to 260mA at power up. Do you suggest the act of changing the inductor value? Will it impact the system stability? Thank you.
Vout: 9V @ 20mA
L5 inductor:10uH±10%/0806/DCR:1.2ohm/current rating:225mA
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In reply to Minqiu Xie:
I studied the application note - slva307b, which provides a way to adjust soft start time in order to reduce inrush current. However, the method described is applied to TPS61070. Does it also applicable to TPS61046? Besides, I also attempted to change inductor value from 10uH to 1uH, and noticed that inrush current reduces significantly. Do you think it is a good idea to modify the inductor value in order to minimize inrush current? Will it introduce instability to the system? Thank very much.
In reply to Hoi Wa Ip:
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