Answered

• TPS62740: Resistor between EN and VIN

  

  Antony Lin

  Resolved

  Part Number: TPS62740 Hi, The customer design now connect EN pin to VIN through a 10kohm resistor so that the device is enabled whenever there's a valid VIN, Is it better or worse to implement a 10kohm here? How to judge what is a better value here…

  • Resolved

  • over 5 years ago
  • Power management
  • Power management forum

• TPS62740: TPS62740 in an Inverting Buck-Boost Topology

  

  WALID BALID

  TI Thinks Resolved

  Part Number: TPS62740 Other Parts Discussed in Thread: TPS62120 , LM27761 , TPS60400 Is it possible to use TPS62740 in an Inverting Buck-Boost Topology similar to TPS62120? Thanks

  • over 6 years ago
  • Power management
  • Power management forum
Answered

• TPS62740: When Vin<2.2V, TPS62740 does not work, but the resistance between the Vout and GND is 20-30 ohms.

  

  Kevin Chen81

  Resolved

  Part Number: TPS62740 TPS62740 Vin Voltage range is 2.2~5.5V We encounter a problem that when Vin is less than 2.2V, Vout is almost connected to the ground. Is the resistance between the Vout and the GND very small when the chip is not working? Is there…

  • Resolved

  • over 5 years ago
  • Power management
  • Power management forum

• TPS62740: TPS62740 VSEL Pins

  

  Mesut TOPUZLU

  TI Thinks Resolved

  Part Number: TPS62740 Hi. Can I control voltage selector pins (VSEL) with MCU connection directly? I want to change VOUT voltage level with main MCU that connected to VOUT.

  • over 6 years ago
  • Power management
  • Power management forum

• RE: CC2640R2F: Power consumption comparison between external regulator mode (1.8V) and "normal operation" (3.3V) for CC2640

  

  desouza

  Albert, Thanks for your inquiry. Indeed the datasheet tables show the operation in DCDC and LDO modes (Figures 8-10 and 8-11) which still have these peripherals still powered. The transition between the DCDC and LDO is around 2.1V. You can use these graphs…

  • 6 months ago
  • Bluetooth®︎
  • Bluetooth forum
Answered

• TPS62740: Calculating losses for very low loads

  

  Stephen Fenwick

  Resolved

  Part Number: TPS62740 I'm looking at using the TPS62740 for a system which has very low loads in sleep: about 1-2uA. Loads in normal operation are about 4mA. I'm trying to predict the total losses in the low load mode. By total losses, I mean Loss…

  • Resolved

  • over 5 years ago
  • Power management
  • Power management forum

• TPS62740: -Startup time is not deterministic, has a variable delay after Enable assertion

  

  Barry Rowland

  TI Thinks Resolved

  Part Number: TPS62740 Other Parts Discussed in Thread: TPS62800 Dear TI people; As per the title line: The spec is pretty 'loose' on the startup delay, I wondered if there is any better characterisation, or whether this start-up delay depends on Vin, for…

  • over 5 years ago
  • Power management
  • Power management forum

• TPS62740： About reverse battery input

  

  shouehi hasegawa

  TI Thinks Resolved

  Part Number: TPS62740 PMOSはパワーステージに含まれてい ますこれは逆入力に有効ですか？

  • over 6 years ago
  • Power management
  • Power management forum

• TPS62740: VSEL4 behaviour when unterminated

  

  Barry Rowland

  TI Thinks Resolved

  Part Number: TPS62740 I have seen that VSEL4 seems to follow the state of VSEL3 during power-up, and for some seconds after that... if VSEL3 is Hi, then VSEL4 seems to return to a LOW state about 3-20 seconds after power-on is complete. At that point…

  • over 6 years ago
  • Power management
  • Power management forum

• TPS62740: TPS62740 + SuperCAP

  

  dtluigi

  TI Thinks Resolved

  Part Number: TPS62740 I want to use a 0,44F as output capacitor of a TPS62740. The DS states that "A larger output capacitors can be used, but it should be considered that larger output capacitors lead to an increased leakage current in the capacitor…

  • over 7 years ago
  • Power management
  • Power management forum

Didn't find what you are looking for? Post a new question.