Answered

• LM2776: Wrong output voltage

  

  John Lemke

  Resolved

  Part Number: LM2776 I am getting Vout = -0.7V for the LM2776 part with the following conditions: Vin = 5.5V C between pins 5 and 6 = 1 uF Cout = 2.2 uF Any clues what might be happening here? Thanks, John

  • Resolved

  • 22 days ago
  • Power management
  • Power management forum

• LM2776: LM2776DBVR design

  

  ilya tashaev

  TI Thinks Resolved

  Part Number: LM2776 Hello i have designed a negative 5V supply with the LM2776DBVR as i read the datasheet i'm not sure what would be the best C FLY to chose ? i chose 2 x 4.7uF ? for the input / output i chose 10uF / 10uF (although the EVM has 2 x…

  • 1 month ago
  • Power management
  • Power management forum
Answered

• LM2776: Output ripple calculation

  

  Kei Kuwahara

  Resolved

  Part Number: LM2776 Hello team, The output ripple measurement graph (Fig 1) is very different from the output ripple calculation equation (equation 4) on the datasheet. The shape of the graph on Figure 1 is not linear. What is the condition of the circuit…

  • Resolved

  • 5 months ago
  • Power management
  • Power management forum
Answered

• LM2776: Cascade connection

  

  Omer YILDIRIM

  Resolved

  Part Number: LM2776 Other Parts Discussed in Thread: OPA2197 Hello everyone Can I use two or more LM2776s by connecting them to the cascade? Not specified in its datasheet?

  • Resolved

  • 6 months ago
  • Power management
  • Power management forum
Answered

• LM2776: USING THE LM2776 TO POWER OP AMP NEGATIVE RAIL

  

  Dave Chowning

  Resolved

  Part Number: LM2776 I am using the LM2776 to supply the negative rail of a dual supply rail to rail in & out op amp. If the LM2776 has no output for the negative rail but the positive rail is still there, will the op amp swing to the positive rail or…

  • Resolved

  • 10 months ago
  • Power management
  • Power management forum

• LM2776: Why charge pump can not output large current?

  

  Kevin Zeng

  TI Thinks Resolved

  Part Number: LM2776 Hi Team, For the charge pump, I have some questions need to support. 1. Why charge pump can not output large current? Can we add the c apacitance capacity to achieve large current? 2. For charge pump a rchitecture, when the S1 and S3…

  • over 1 year ago
  • Power management
  • Power management forum

• LM2776: Vout drop when start up at -40°C

  

  Mona Guo

  TI Thinks Resolved

  Part Number: LM2776 Hi team, my customer are using LM2776 in series to have -10.6V output voltage, the schematic is below. Phenomenon: when start up at low temp( 10℃~-40℃ ), the second stage only reach -7, can't reach -10.6V. if start up at room temp or…

  • over 1 year ago
  • Power management
  • Power management forum

• LM2776: LM2776

  

  Vito Cheng

  TI Thinks Resolved

  Part Number: LM2776 Other Parts Discussed in Thread: LM2663 , LM2662 Hi We can't find any stock of LM2776 in TI.com, is there any suggestion on the alternative TI parts we may consider? Thanks.

  • over 1 year ago
  • Power management
  • Power management forum

• LM2776: Not providing inverted voltage

  

  Einar Petursson

  TI Thinks Resolved

  Part Number: LM2776 Hi, I have a problem with the LM2776 and it's not able to provide the inverted voltage. If we apply negative voltage to the test pins the LM2776 from a external power supply the part starts providing the inverted voltage. Any…

  • over 1 year ago
  • Power management
  • Power management forum
Answered

• LM2776: Pulse frequency modulation of LM2776

  

  Basil Brunner

  Resolved

  Part Number: LM2776 Other Parts Discussed in Thread: TPS60403 Hello I have an appplication, that is sensitive to switching frequencies at about 10 bis 20 kHz. I uses the LM2667, which as a fundamentel switching frequency of 2MHz. In my application, the…

  • Resolved

  • over 2 years ago
  • Power management
  • Power management forum

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