TPS63001DRCR

user5966040

Other Parts Discussed in Thread: TPS63001

TPS63001DRCR

Use The recommended circuit，Power supply 3.6 v, limit current 0.5 a, when the load instantaneous start circuit is greater than 0.5 a, switch power recommendation circuit inductor L1 continued 0.5 a discharge, and the power supply voltage low，I want to know what's causing it, how the circuits should be changed

over 5 years ago

0 Minqiu Xie over 5 years ago

TI__Mastermind 21565 points

Dear user:

What the power supply you are using? Does it have enough current capability?

0 user5966040 over 5 years ago in reply to Minqiu Xie

Prodigy 40 points

Adjustable DC switching power supply, set output voltage 3.6 v, current limit 0.5 a.

IF limit the output current of the power supply to 1A, when the load of the instantaneous starting current is less than 1A, when the TPS63001DRCR is working normally

0 Minqiu Xie over 5 years ago in reply to user5966040

TI__Mastermind 21565 points

Dear uses:

So it means the power supply don't have enough current capabiity, right?

The Iin=Vout*Iout/Vin/Eff. During the startup, the converter need larger current to charge the output capacitance to target value.

0 user5966040 over 5 years ago in reply to Minqiu Xie

Prodigy 40 points

YES，

0 Minqiu Xie over 5 years ago in reply to user5966040

TI__Mastermind 21565 points

Dear user:

So the solution is reduce the load or enlarge the power supply capability. If you have another question, just reply below.

0 user5966040 over 5 years ago in reply to Minqiu Xie

Prodigy 40 points

This problem is caused by switching power supply, 3.6V power supply, 0.5A limiting current, L1 inductance in tps63001 drcr recommended circuit continues to discharge 0.5A. If the circuit board is removed from the switching power supply, there will be no such problem

0 Minqiu Xie over 5 years ago in reply to user5966040

TI__Mastermind 21565 points

Dear user:

Sorry that I'm confused. If the load is greater than 0.5A, it make sense that Iin >0.5A considering the efficiency.

Please allow me check again with you:

1. What's your Vin, Vout, and load condition?

2. How about enlarge the input capacitor and disable the load during startup?

0 Minqiu Xie over 5 years ago in reply to Minqiu Xie

TI__Mastermind 21565 points

Dear User:

As long time no hear from you, I assume you have solved the issue. If not, just reply below. Thank you!

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