TPS54294: Pin treatment

kura

Genius 4800 points

Part Number: TPS54294

Our customer would like to use only Ch1 of TPS54294.

Please let us know how to following Pins treatment when they don't use Ch2.

VIN2

VBST2

SW2

PGND2

EN2

PG2

VFB2

Regards,

over 2 years ago

0 Amod Vaze over 2 years ago

TI__Mastermind 25050 points

Kura,

I need to check the internal schematic with design to ensure there is no issue with this. I will provide an update once I hear back from the team. On initial glance, this may not be a problem as VIN1 is used to derive VREG5 voltage which is crucial for the gate drive circuitry. Are you planning on leaving these channel 2 pins open?

Thanks,
Amod

0 Amod Vaze over 2 years ago in reply to Amod Vaze

TI__Mastermind 25050 points

Hi Kura,

We do not have easy access to design database or an EVM handy. Based on datasheet, channel 1 VIN is used to drive internal VREG5 voltage. However, you can use it this way:

1. Short VIN1 and VIN2

2. Tie EN2 to GND

Thanks,

Amod

0 kura over 2 years ago in reply to Amod Vaze

Genius 4800 points

Amod-san

Thank you for your reply.

Please answer the remaining following pins.

VBST2

SW2

PGND2

PG2

VFB2

Since the mounting area is also strict and this Ch2 is not used, they would like to configure it with only the minimum necessary parts

without using inductor etc. if possible.

regards,

0 Shuai Fan over 2 years ago in reply to kura

TI__Genius 13451 points

Amod will reply you next Monday!

Shuai

0 Amod Vaze over 2 years ago in reply to kura

TI__Mastermind 25050 points

Hi Kura,

You can leave them open or short to ground as the channel 2 will be disabled due to EN2 being grounded.

Thanks,

Amod

0 kura over 2 years ago in reply to Amod Vaze

Genius 4800 points

Amod-san

Thank you for your support.

From your answer, we will advise following pin treatment to customer.

VIN2::short to VIN1

EN2: short to GND

VBST2: leave open or short to ground

SW2: leave open or short to ground

PGND2: leave open or short to ground

PG2: leave open or short to ground

VFB2: leave open or short to ground

Regards,

0 Amod Vaze over 2 years ago in reply to kura

TI__Mastermind 25050 points

Sounds good Kura.

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TPS54294: Pin treatment