TPS25221: Question about Rlim.

 Hello guys,

 Sorry. My precious question was wrong a little.

 Correct question is the below.

Q. We'd like to set 1.0A as ILIM.  According to Figure 24, Current-Limit Threshold vs Current-Limit Resistor (RILIM)

     on page 14 of the device datasheet(SLVSDT3D),

     RILIM(typ) is about 55kohm for 1A. Also the ILIM variation range is about 900mA~1100mA.

     While ILIM(typ) calculated by equation (1) with 55kohm is about 974mA Also the calculated ILIM variation is 721mA~1328mA.

     My question is the below.

     Which is closer to the actual current? the graph or the equation?

 Could you please give me your reply?

 Best regards,

 Kazuya.

 Hi Ansel

 Thank you very much for your reply. But I couldn't see the capture.

 Could you please attach it again with another way?

 Also let me explain about their question again because my previous question was not good.

 They want to set 1.0A as ILIM.  

 When RILIM is 55kohm. ILIM(Min), ILIM(Typ), ILIM(Max) are 0.9A, 1.0A 1.1A, according to Figure 24.

 When RILIM is 55kohm. ILIM(Min), ILIM(Typ), ILIM(Max) are 0.721A, 0.974A 1.328A, according to Equation (1).

 As you see, Min, Typ, Max vlues are different between Figure 24 and Equation (1)

 Their question is the below.

  Q1. Which is better to use to get RLIM value for 1A, Figure 24 or Equation (1)?

  Q2. Which is more accurate for Min/Max value, Figure 24 or Equation (1)?

 Thank you again and best regards,

 Kazuya.