TPS65283: The relationship between EN1 and V7V

Hermes Lin1

Part Number: TPS65283

hi sir:

Per our measurement, the V7V will drop to 0V when the Buck1 Enable is pulled low (disabled).

Once the V7V drops to 0V, the output power through the switch will be cut off. Is it the expected

behavior of TPS65283?

0 Zhao Ma over 6 years ago

Hi,

I checked on EVM,

When EN1=low, the V7V is present, it is 6.3V.

So your test result is abnormal.

please double check it.

0 Hermes Lin1 over 6 years ago in reply to Zhao Ma

hi sir:

if pull low ENx low that 0.4V will turn off LDO and cause the SW_out off?? customer test waveform as bolew:

it's correct? There are other possible to cause SW_out off??

0 Zhao Ma over 6 years ago in reply to Hermes Lin1

Hi,

I check EVM again.

When EN1 and EN2=low, the V7V will be pull low, LDO shut down, the POWER SWITCH is turn off, so the SW_out is pull low too.

i cannot see your waveform, could you send again?

0 Hermes Lin1 over 6 years ago in reply to Zhao Ma

hi Zhao Ma:

waveform as attachment, please help confirm again.

just want to check the operation is corrent in device.

0 Zhao Ma over 6 years ago in reply to Hermes Lin1

Hi,

The operation is correct and matches the design.

Power management forum