TPS63036: Input Current Limit - Power management forum - Power management

TPS63036: Input Current Limit

Part Number: TPS63036
Other Parts Discussed in Thread: TPS55288

Dear TI Team

I would like you to answer the following questions regarding the input current limit of TPS63036.

1. Average input current limit is specified by 1A (typ) as follows. In the data sheet, it was stated that the input current limit changes due to the input voltage,
but it was not stated that the input current limit changes due to the change in Ta.
For example, if the temperature changes from Ta = 25 ° C to around 40 ° C, does the following Input Current limit change?

2. The data sheet states that the Input Current Limit is 400mA when the output voltage is 1.2V or less. Is it okay to recognize this value as a typ value? Also, does this value change depending on the IC and the ambient temperature?

3. In the case of TPS63036, it is considered that the IC operation (switching operation) stops when an input current exceeding the Input Current Limit flows.
If the input current temporarily exceeds the Input Current Limit and the IC stops operating and the current value falls below the Input Current limit, does the IC start operating again?

Best Regards,
Y.Ottey

0 Yichen Xu over 4 years ago

TI__Expert 4760 points

Hi Ottey,

1&2: The average current limit is a typical value which will change depending on the IC and the ambient temperature.

3: If the input current temporarily exceeds the Input Current Limit, the IC will not stop operating. The input current will be limited. But when the load current is high, the output voltage will be pulled down, if Vo is less than 1.2V, the current limit will decrease and Short Circuit Protection occurs.

Best Regards,

Yichen Xu

0 Yichen Xu over 4 years ago

TI__Expert 4760 points

Hi Ottey,

Haven't got your reply for a long time. I think it is solved. If not, welcome to contact us.

Best Regards,

Yichen

0 Kunal Burman over 4 years ago in reply to Yichen Xu

Prodigy 90 points

Hello Sir, Please can you tell me if i can use TPS63036 for limiting supply current till 1000 mA and send the output data to microcontroller?

0 Yichen Xu over 4 years ago in reply to Kunal Burman

TI__Expert 4760 points

Hi Kunal,

Please specify your needs. For TPS63036, the maximum average current in the switches is indeed
limited to a typical value of 1000 mA.

Best Regards,

Yichen

0 Kunal Burman over 4 years ago in reply to Yichen Xu

Prodigy 90 points

Hello Yichen, Thankyou for your message.

0 Kunal Burman over 4 years ago in reply to Kunal Burman

Prodigy 90 points

Hello Yichen, Thankyou for your message. I actually want to design a circuit that can take current between 20 - 1000 mA as an input with 3 - 20 Volts and send it to STM32 Microcontroller to carry out a 4 wire measurement, to measure resistance till 50 megaOhms. Please can yu tell me if I can use any IC's that do the same?

0 Yichen Xu over 4 years ago in reply to Kunal Burman

TI__Expert 4760 points

Hi Kunal,

The input voltage range is 3~20V, the input current is 20 - 1000 mA, the output voltage is 3.3V, right? If so, TPS55288 is considerable.

Best Regards,

Yichen