LMR33620：LMR33620 and IN39

David Huang

Part Number: LMR33620

Tool/software:

7217.TI POWER.pdf

I have three questions:

1.Please help me confirm whether the inductor value is correct when used with LM33620BRNX.

2.Pin 5 (vcc) of the LM33620BRNX is not used. Do I need to place a 1uF capacitor to ground?

3.INA39 uses a (0.0005) resistor R to detect micro-resistance, and a 22K resistor RL is used at the output end. Is this correct?

4.Detecting the current consumption of 4S~6S lithium batteries (16V~26V), is it recommended to use INA39 or INA69?

Thanks!

0 Naresh Adepu 23 days ago

Hello,

thanks for your question. We will look into you and get back to you

thanks and regards

+1 Naresh Adepu 23 days ago in reply to Naresh Adepu

Hello David,

I support LMR33620 and can provide my feedback for those questions.

1. Yes, the used values of inductor in the schematic are as recommended by the datasheet. So it is okay.

2. Even if you don't use VCC pin, it is highly recommended to connect a high quality 1-µF capacitor from this pin to GND.

Thanks and Regards,

Naresh

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