TPS23523: TPS23523 datasheet spec, what is GATE=Hi

Wenhao Wu

Part Number: TPS23523

Hi Team,

While testing startup waveforms of our EVM, I found 23523 will enter normal operation mode when

When I test GATE2 as well as GATE. It has been mentioned that it is after GATE reaches 7.5V that GATE2 starts to rise. Thereafter, GATE will start to rise steeply with ~1ms delay.

In addition, it is really apparent that BGATE has a lot of drops during start up and quantities of drops are related to VIN.

(1)Please kindly give a comment on that 1ms delay between GATE2 reaches 15V and GATE reaches 15V. Does GATE=7.5V means GATE=Hi?

(2)Please kindly give a comment on BGATE delay during start up.

Thank you very much!

Best Regards,

Wenhao

over 6 years ago

0 Rakesh over 6 years ago

TI__Guru** 105361 points

Hi Wenhao,

I will look into it and get back to you.

Best Regards,
Rakesh

0 Wenhao Wu over 6 years ago in reply to Rakesh

TI__Genius 9046 points

Hi Rakesh,

No worries! Just take your time. Thank you!

-Wenhao

0 Rakesh over 6 years ago in reply to Wenhao Wu

TI__Guru** 105361 points

Hi Wenhao,

what are the loading conditions?
Also help on which channel corresponds to which test node?

Best Regards,
Rakesh

0 Wenhao Wu over 6 years ago in reply to Rakesh

TI__Genius 9046 points

Hi Rakesh,

(1)what are the loading conditions?
No load;
(2)Also help on which channel corresponds to which test node?
ch1@BGATE; ch2@VIN; ch3@GATE; ch4@I_IN;
Probe ground: VEE

Thank you!

-Wenhao

0 Wenhao Wu over 6 years ago in reply to Wenhao Wu

TI__Genius 9046 points

Hi Team,

Anyone updates on this? Thanks!

-Wenhao

0 Rakesh over 6 years ago in reply to Wenhao Wu

TI__Guru** 105361 points

Hi Wenhao,

None of these details are clear from the datasheet. I need to check on EVM to confirm.
As local festive season going on.. I would be able to get back by end of next week.

Best Regards,
Rakesh

0 Wenhao Wu over 6 years ago in reply to Rakesh

TI__Genius 9046 points

Hi Rakesh,

Thank you for your reply. I know you are now experiencing an important period and you are extremely busy. Just take you time and feel relaxed. I would not need the answer immediately.

Regards,

-Wenhao

0 Rakesh over 6 years ago in reply to Wenhao Wu

TI__Guru** 105361 points

Hi Wenhao,

(1)Please kindly give a comment on that 1ms delay between GATE2 reaches 15V and GATE reaches 15V. Does GATE=7.5V means GATE=Hi?
1A) Correct. 7.5V of GATE is treated as GATE_Hi
(2)Please kindly give a comment on BGATE delay during start up.
2A) After Vin crosses UVLO rising threshold, the BGATE delay is around 1ms.

Best Regards,
Rakesh

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TPS23523: TPS23523 datasheet spec, what is GATE=Hi