TPS562201: Ton, over current and the voltage at SW

Michiaki Tanii

Part Number: TPS562201
Other Parts Discussed in Thread: TPS53511, TPS562208,

Hi,

Could you kindly advise the below ?

- How could we calculate the value of overcurrent with another condition against datasheet ?

- Please let me know Ton value.

Thank you and best regards,

Michiaki.

0 Edwin Zang over 4 years ago

Hi Michiaki,

The typical OC threshold value is 3.2A. It's constant.

Ton depends on the input voltage and output volt6age. Ton is Vout/Vin/Frequency.

BRs,

Edwin.

0 Michiaki Tanii over 4 years ago in reply to Edwin Zang

Hi Edwin,

As for Ton time, what I want to ask you is on time in on-time timer control.

For example, on time of TPS53511 is specified 145ns in the datasheet as below but I cannot find the data in TPS562208 datasheet.

Thank you and best regards,

Michiaki.

0 Edwin Zang over 4 years ago in reply to Michiaki Tanii

Hi, Michiaki,

In TPS562201/8 it tests frequency, not on time. So we don't have on time data. We have frequency data. You can find it in EC table.

BRs,

Edwin.

0 Michiaki Tanii over 4 years ago in reply to Edwin Zang

Hi Edwin,

TPS562201 is applied to D-CAP2 topology.

It means that constant on time would be specified between input voltage and output voltage.

Could you kindly advise how to estimate the constant on time by customer ?

Thank you and best regards,

Michiaki

0 Edwin Zang over 4 years ago in reply to Michiaki Tanii

Hi Michiaki,

Ton(on time) is Vout/Vin/Frequency.

BRs,

Edwin.

Power management forum