Forum Post: RE: Need help! Got damage when TX_SDK_V1 is powered up.
Hi Frank, Please see my reply on thread "Need help in using TX_SDK_V1" Regards, Charles
View ArticleForum Post: LM96550 VPF/NPF Power Question
I have a customer from Qualcomm who is asking the following questions: I want to apply +10V for VPP and -10V for VNN. Please advise what voltage values can be applied to VPF and VNF? What happens if...
View ArticleForum Post: RE: LM96550 VPF/NPF Power Question
Hi Richard, You are right that VPF & VNF need to be bias. If VPF & VNF are floating, the device will not function & might be damaged too. Does the customer has to use the LM9650? How about...
View ArticleForum Post: RE: LM96550 VPF/NPF Power Question
Correction. The device with internal LDOs for VPF & VNF is LM96551 , not LM9651 as mention earlier.
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Charles, Thank you very much for your reply. Yes, the short is between pin 2 & pin3 of J_SUB. We think we didn't do anything wrong according to the user guider. We've bought all of the main...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Frank, 1) The +50V & -50V don't have to power on simultaneously. 2) -50V doesn't need to be power on before +50V as long as Vsub is powered on first. 3) A little noise on the power supply...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Charles, Thank you very much for your reply. 1. We set the current limit on the supplies, but none of them are less than 100mA. The current limit for VSUB is 1A. 2. We didn't program the LM96570 in...
View ArticleForum Post: RE: LM96550 VPF/NPF Power Question
Charles, Thanks for your response! I will let you know if the customer has any further questions. Thanks again. Richard Elmquist
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Frank, Can you draw me the schematic of your switch board? Specifically, how are you connecting the -50V power supply to VSUB and VNN (-50V)? Thanks, Charles
View ArticleForum Post: RE: Power Module Schematic for TX-SDK-V1 and TX-SDK-V2
Hello, Charles, I've looked through the reference design and i got confused about the low voltage output part. In the +5/+3.3V part, an LDO regulator was used after the DC/DC regulator, does it make...
View ArticleForum Post: RE: Power Module Schematic for TX-SDK-V1 and TX-SDK-V2
The main reason is because it has lower noise.
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Charles, Thank you very much for your reply. And I'm sorry for reply so late, we went to a conference for several days. The schematic is as follows: And we takes all the main chips off the board,...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Frank, Are you sure your schematic is correct? All the diodes are forward bias. Can you measure the voltage at all the supplies when not connecting to the TX_SDK_V1 board? Regards, Charles
View ArticleForum Post: Query regarding AFE4300 EVM
Appendix b of AFE4300 Development Guide "Literature Number: SBAU201A" has PCB layout and schematics that is described as AFE4300 EVM. The AFE4300EVM-PDK in the link...
View ArticleForum Post: RE: Query regarding AFE4300 EVM
Hello Ganesh, The AFE4300EVM-PDK demonstration kit contains two boards: 1. AFE4300 EVM PCB 2. MMB3 modular motherboard The MMB3 board allows the AFE4300EVM to be connected to the computer through an...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Charles, Thank you for reply. Yes, we are sure the schematic is correct. The diodes are lumious diodes, just to indicate us whether the supply is on or off. We measured the voltage at all the...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Frank, I don't know what could happen to damage the board if you follow the user guide & power up sequence correctly. If I were you, I would take out and replace all the active devices on the...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
Hi Charles, Thank you for reply. Here is the new update: 1. We have taken all of the chips(6 chips: LM96551 , LM96530 , LM96570 , 74AC08MTC, LMV321 , FXL4TD245BQX ) off the board, and we checked that...
View ArticleForum Post: RE: Need help in using TX_SDK_V1
And does the TX_SDK_V1 board must be connected to the FPGA board before powering up?
View ArticleForum Post: RE: Need help in using TX_SDK_V1
And does the TX_SDK_V1 board must be connected to the FPGA board before powering up? I think it's not a must.
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