LM61460-Q1: There is no waveform of SW pin with Pspice for TI

wang wan

Part Number: LM61460-Q1

We simulated the circuit below with Pspice for TI. At first 6ms, the load current is 6A. During 6ms-8ms, the load current is about 0A. After 8ms, the load is 6A again. I am wondering why there is no waveform of SW during 6ms-8ms?

Model:

Setting

Simulation

over 1 year ago

0 Andy Chen over 1 year ago

TI__Mastermind 27045 points

Hi Wang

This is PFM option converter which enter sleep mode in 0A condition, you can bias few 10mA load to see it will the switch between 6ms--8ms.

B R

Andy

0 wang wan over 1 year ago in reply to Andy Chen

Prodigy 130 points

Thanks！After bias 10mA, it can switch between 6ms-8ms.

By the way, where is 'This is PFM option converter which enter sleep mode in 0A condition' from? I can't find it in the datasheet.

If it enters sleep mode, how does it maintain the output of 3.8V?

+1 Andy Chen over 1 year ago in reply to wang wan

TI__Mastermind 27045 points

Hi Wang,

Pls refer to below section on data sheet:

8.4.3.2 Auto Mode - Light Load Operation

B R
Andy

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LM61460-Q1: There is no waveform of SW pin with Pspice for TI