• TPS2121: TPS2121

  

  CHENWEN WU

  TI Thinks Resolved

  Part Number: TPS2121 Hi, I am using TPS2121 in our design with the following parameters: VIN1 = DC Adaptor = 5V , VIN 2 = VBUS = Regulated voltage range 4.75~5.25V. Now , CP2 voltage=1.8V, PR1= 1.3V Now , i have a problem. When adaptor and USB power are existing…

  • 20 days ago
  • Power management
  • Power management forum
Answered

• TPS2121: tps2121 inrush current

  

  Jim Tseng

  Resolved

  Part Number: TPS2121 HI Expert, Here is system power flow. POE 12V > TPS2121 There are many capacitor between POE and TPS2121. Around 600uF. I want to calculate the inrush current from POE output side to TPS2121. Where can check the TPS2121 internal…

  • Resolved

  • 2 months ago
  • Power management
  • Power management forum
Answered

• TPS2121: tps2121 inrush current

  

  Jim Tseng

  Resolved

  Part Number: TPS2121 Hi Expert, Here is power flow. POE 12V> TPS2121 we have around 600uF from POE 12V output to TPS2121 input. Could I know how to calculated inrush current? And where can I check the internal FET SOA of TPS2121. I * t = C * V I =…

  • Resolved

  • 2 months ago
  • Power management
  • Power management forum

• TPS2121: Technical issues

  

  Zhonghui Xu

  TI Thinks Resolved

  Part Number: TPS2121 Hi team, I got a question from customer.I put it in word. question.docx Thank you very much for your help. Best regards,

  • 25 days ago
  • Power management
  • Power management forum
Answered

• TPS2121: Instability observed with TPS2121

  

  Leona Mei

  Resolved

  Part Number: TPS2121 Hi, We are currenting using TPS2121 in our design with the following parameters: VIN1 = VBUS = expected Voltage range 4.75 - 5.2V VIN2 = V_POE_5V = Regulated voltage range 5V The idea is to prioritize on VIN1 due to better efficiency…

  • Resolved

  • 3 months ago
  • Power management
  • Power management forum
Answered

• TPS2121: CP2 Floating implications

  

  Steve Widener

  Resolved

  Part Number: TPS2121 What are the implications if the CP2 is left floating? Will the TPS2121 default to one state or the other or could there be instability?

  • Resolved

  • 1 month ago
  • Power management
  • Power management forum

• TPS2121: Max I_Limite setting

  

  Zhanpeng Li

  TI Thinks Resolved

  Part Number: TPS2121 Hi Team, Have a question on I_Limte setting: From the Datesheet, we could know that we could get I_limte=5.2A when Rlimte=18.7kohm. But we could like to check whether Rlimite could be set lower than 18kohm to get larger I_limite? …

  • 2 months ago
  • Power management
  • Power management forum
Answered

• TPS2121: Need qty. 6 of TPS2121RUX; can't find anywhere

  

  Derek9531

  Resolved

  Part Number: TPS2121 Hello, We have a design that uses a ton of TI silicon including the TPS2121RUX. We've build several versions of this in production. We want to prototype a few boards with changes but we can't find this part in stock anywhere to buy…

  • Resolved

  • 2 months ago
  • Power management
  • Power management forum

• TPS2121: could not get the expected input

  

  Jiawei Hu1

  TI Thinks Resolved

  Part Number: TPS2121 Other Parts Discussed in Thread: TPS2116 Hi team, My customer use TPS2121 for input selection, and they want to get the output from the higher input, but get the output from 3.6V, not 3.8V. Sch is as below figure, could you kindly…

  • 2 months ago
  • Power management
  • Power management forum

• TPS2121: Can you help check if TPS2121 can meet our requirement ?

  

  PYTsai

  TI Thinks Resolved

  Part Number: TPS2121 Hi Can you help check if TPS2121 can meet our requirement ? At Initial stage : VIN1=CP2=PR1=0V, VIN2=5V , Vout=VIN2. when VIN1 goes up: VIN1=VIN2=5V , PR1>Vref ,CP2=0 , Vout=VIN1 When VIN1 off : VIN1 = off , VIN2=5V , PR1>VREF…

  • 5 months ago
  • Power management
  • Power management forum

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