SN65DP159: How to reduce the power consumption in Stand-by mode of PC

Tamio Yokokura

Part Number: SN65DP159

SN65DP159 is specified that the device power in power down mode is typ.10mW and max.30mW. But this specification is higher than the device power of our competitor device according to our customer comments.

The below is their idea for reducing the device power in Standby mode that add the FET switch on VDD pin and VCC pin. Their target device power is less than 5mW. As reference, the device power of the competitor is less than max.1mW.

What are the issues with adding FET switches to the VDD and VCC pins?

What do they need to be aware of?

Do you have any good idea?

Please give me your advice for reducing the device power.

Thanks

Tamio

over 6 years ago

0 David (ASIC) Liu over 6 years ago

TI__Guru**** 190491 points

Tamio-san

You can use FET switch to gate the VCC and VDD power supply, please make sure the power up sequence is followed when waking up from the standby condition.

Thanks

David

0 Tamio Yokokura over 6 years ago in reply to David (ASIC) Liu

TI__Expert 4070 points

HI, David,

Thank you for your quick reply.

Yes, I will feedback my customer so that they pay the caution about the power up sequence when waking up from the Standby mode.

Thanks

Tamio

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SN65DP159: How to reduce the power consumption in Stand-by mode of PC