TPS2662: JMA Wireless - TPS26621 Schematic Review

Owen Mears

Expert 4335 points

Part Number: TPS2662

Hello,

Customer is requesting a schematic review for TSP26621. Really appreciate the support here!

Thank you,

Owen

over 1 year ago

0 Kunal Goel over 1 year ago

TI__Guru 70460 points

Hi Owen,

Overall looks fine. They can consider using TVS diode at input of eFuse for transient protection. Also if they have EVM can they verify that at VIN=38V, UVLO pin voltage stays below 5V.

Regards

Kunal Goel

0 Owen Mears over 1 year ago in reply to Kunal Goel

TI__Expert 4335 points

Hi Kunal,

Thanks so much for getting back quickly here!

At 38V, the UVLO input would exceed 5V. Customer is asking if we have a recommendation on how to ensure that UVLO input remains at 1.2V when Vin = 5.5V, and stays below 5V for Vin = 38V.

I really appreciate your help.

Owen

0 Kunal Goel over 1 year ago in reply to Owen Mears

TI__Guru 70460 points

Hi Owen,

I will get back by tomorrow EOD on this.

Regards

Kunal Goel

0 Kunal Goel over 1 year ago in reply to Kunal Goel

TI__Guru 70460 points

Hi Owen,

1. They can try increasing pull up resistor above 768K that will reduce current into pin and thus UVLO voltage.

2. They can consider using external 5V zener on UVLO pin.

Regards

Kunal Goel

Power management

Power management forum

TPS2662: JMA Wireless - TPS26621 Schematic Review