Hello,
I need an isolated power solution that can take 5Vin, 5 or 3.3Vout, and 10mA out.
Would Flyback be the best solution here because of the need for isolation? Could you recommend best solution/direct me to the best family of devices?
Thanks,
Adam
Part Number: MSP430FR2676
In summary, we're bringing up an MSP430 as a SPI slave with some test code and it is working properly at 16Mhz. However, because this device will be deployed in the field for a very long life on battery power only, we are slowing MCLK and SMCLK down to 250kHz. When we do so, the code and/or SPI peripheral are not performing as expected (even after slowing the master clock to 4kHz); it seems like the firmware and peripheral are out of synch by one byte, with one extra unitialized value observed on the bus, although the firmware appears to have received and transmitted the correct values. It seems as if a shift is perhaps beginning before the tx register is loaded in the ISR (but only on the first ISR).
Screenshots in the attached PDF.
Thank you.
(Please visit the site to view this file)
Part Number: TIPD193
The TIPD193 BOM <http://www.ti.com/lit/df/tidrf13/tidrf13.pdf>
..dated in the year 2015 contains "78.7k" in the value column for R3/item #11.
That R3 value is incorrect in that column.
The description column lists the correct "78.7" value.
When using the 78.7k Resistor, at room temperature (108 ohms RTD) the input value at the INA326 will be -3.8 volts, which is outside the absolute maximum values.
Where to report this resistor value error/mistake/typo to get the TIPD193 BOM fault free?
Part Number: TPS7A92
We've noticed that the Rtheta-JB is 29.1C/W for this device TPS7A9201DSK. Comparing to the TPS7A7100RGT which has an RthetaJB of 17.2C/W
Why are the JB thermal resistances so dramatically different given the Rtheta JC specs are about the same - is this correct? Are there two different constructions inside?
Part Number: UCC28704
We're developing a Universal AC/DC 5V/1A using the UCC28704, that was based on the WeBench Design Tool. We houve some doubts about the circuit, since we're using the 7508110151 transformer from Wurth, but can't seem to find any reference from it on the WeBench, will our circuit function correctly using these components ?
We will also need to supply some non-isolated components, which will require approximately 3V3/20mA. Is it possible to use the auxiliary winding with a low quiescent LDO ? If so, whre is the best place to connect it ?
Best Regards, Drauzio.
Part Number: FDC2214
Hello,
I'm configuring the FDC2214 for use with an analog multiplexer and some custom sensors and am confused by how to properly configure the current drive control registers.
SENSOR_ACTIVATE_SEL (CONFIG[11])
Does this control the current only during the "Channel X Sensor Activation" period as shown in Fig. 13 (multi-channel mode) and the "Sensor Activation" period shown in the Fig. 14 (single-channel mode)?
When set to Full Current Activation Mode (b0), is the idea that the FDC dumps the maximum current the device can source to the sensor to agitate it, and then the FDC reduces the current to the value set in CHx_IDRIVE (DRIVE_CURRENT_CHx[15:11])? For how long does the FDC agitate the sensor before switching to the programmed conversion current?
When set to Low Power Activation Mode (b1), is the idea that the FDC limits the sensor current to the value set in CHx_IDRIVE (DRIVE_CURRENT_CHx[15:11]) during both activation and conversion?
HIGH_CURRENT_DRV (CONFIG[6])
I understand that this setting allows the FDC to either excite up to four sensors with up to 1.5mA (low current mode, b0) or one sensor attached to CH0 with 6mA (high current mode, b1).
When in low current mode (b0), can the FDC drive the sensor with a maximum of 1.571mA (as listed in Table 41) or a maximum of 1.5mA (as listed everywhere else)?
When in high current mode (b1), how do the CHx_IDRIVE values correspond to drive current? For example, how would I set CHx_IDRIVE in high current mode to drive a sensor with 3mA? Would that require setting two CHx_IDRIVE fields such that the drive currents sum to 3mA, or are the values listed in Table 41 scaled somehow when in high current mode?
INIT_DRIVE
In the Application and Implementation section of the datasheet (specifically, section 10.2.3.2 #2), the note refers to a field called "INIT_DRIVE" and says that the field should be set to 0x00. This is the only place in the datasheet that this field is referred to; it does not appear as a field in any of the register maps. Is this a mistake in the datasheet or am I missing something?
Thanks for the help,
Tighe
Part Number: DP83867E
Hi,
I am using this part and have a situation where all of this PHY device's power rails may occasionally be shut down. The input clock is from an external board however, is always driven, and may be driving the PHY's clock input while in the shut down state.
Can the part be damaged from this scenario? What are the characteristics in the data sheet to be aware of?
Thanks
Trevor
Part Number: BQ77915
Hello,
I have been having issues with trying to reset an over current fault with the BQ77915. Is removing the load the only possible way to reset the fault? This is not possible for our use case, so Ideally there would be another way to reset the fault. Connecting the battery charger is also not always possible for the product that this chip is being used for.
I tried using the BQ7791504, since that was recommended in a similar forum post to this one. I replaced the IC that was on the EVM with the BQ7791504. This ended up causing the overcurrent protection feature to not work at all, and I was able to draw a significant amount of current from my battery. This is not ideal, along with having the temperature sensing features disabled for the BQ7791504.
If removing the load is the only way to reset this fault, is there a similar TI chip that does not have this "feature"?
Regards,
Alex Mazur
Part Number: BQ77915EVM-014
Hello,
I am having battery balancing trigger whenever I plug in my 7S battery pack into the BQ77915EVM. According to the datasheet, battery balancing only occurs when a power adapter is plugged in (i.e. battery pack is being charged). However, I see battery balancing happening whenever I plug in my battery pack. What is the cause of this?
Regards,
Alex Mazur
Part Number: TMS320F2808
Tool/software: Code Composer Studio
Hello,
I'm having trouble connecting to a development board I'm working on. I know the board is good (I tested it with a different emulator a few weeks ago using boundary scan and I could communicate with the chip then).
That license has since expired, and I'm trying to get an example project working using CCS 6.2 and an XDS110 USB Probe (specifically LAUNCHXL-CC264R2).
I converted over an example project, compiled it, and when I went to connect the the micro this is what I get in return:
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity
[Result]
-----[Print the board config pathname(s)]------------------------------------
C:\Users\bmagnan\AppData\Local\TEXASI~1\
CCS\ti\0\0\BrdDat\testBoard.dat
-----[Print the reset-command software log-file]-----------------------------
This utility has selected a 100- or 510-class product.
This utility will load the adapter 'jioxds110.dll'.
The library build date was 'Jul 27 2016'.
The library build time was '18:31:37'.
The library package version is '6.0.407.3'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
The controller has a version number of '5' (0x00000005).
The controller has an insertion length of '0' (0x00000000).
This utility will attempt to reset the controller.
This utility has successfully reset the controller.
-----[Print the reset-command hardware log-file]-----------------------------
The scan-path will be reset by toggling the JTAG TRST signal.
The controller is the XDS110 with USB interface.
The link from controller to target is direct (without cable).
The software is configured for XDS110 features.
The controller cannot monitor the value on the EMU[0] pin.
The controller cannot monitor the value on the EMU[1] pin.
The controller cannot control the timing on output pins.
The controller cannot control the timing on input pins.
The scan-path link-delay has been set to exactly '0' (0x0000).
-----[An error has occurred and this utility has aborted]--------------------
This error is generated by TI's USCIF driver or utilities.
The value is '-233' (0xffffff17).
The title is 'SC_ERR_PATH_BROKEN'.
The explanation is:
The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
An attempt to scan the JTAG scan-path has failed.
The target's JTAG scan-path appears to be broken
with a stuck-at-ones or stuck-at-zero fault.
[End]
I have the micro pins TRST connected to the RESET line
TDO - TDO
TDI - TDI
TMS - TMS
TCK - TCK
GND - GND
Are there additional lines I need to be connecting to the micro? Why would I be getting this error? I'm stuck at this point and not sure how to move forward.
Part Number: CC3220SF-LAUNCHXL
Tool/software: TI C/C++ Compiler
Hello,
I am trying to use my CC3220SF LaunchPad with the AWS IoT plugin.
I am using Simplelink SDK v2.4 and AWS Plugin v2.2 (What the aws release notes reccomend).
I am trying to run the AWS TI Pub/Sub example demo for CCS.
http://software-dl.ti.com/targetcontent/AWS/2_20_00_02/exports/aws_cc32xx_2_20_00_02/docs/aws/AWS_Quick_Start_Guide.html
While debugging, the only serial output I get is 'Started the AWS IoT Example Application.'.
I cannot find anyone else who has this problem. It is surely a WiFi connectivity problem, as the next output would happen if wifi was configured correctly.
After debugging and looking through the code, it seems that my device is not connecting to and getting and IP from my Wifi. It gets stuck in some loop waiting for wifi connection or provisioning or something.
I am using an iPhone 6 hotspot for my wifi. This should work however, because I have used it successfully in the CC3220SF Out-Of-Box demo.
I am thinking this is because the way the code specifies the wifi access point in the aws demo, is slightly different than the code used by provisioning over AP mode in the out-of-box demo.
I have specified my network credentials in the wificonfig.h file. Specifying the SSID and Security Key, while also changing the encryption type to WPA2 using this line. (iPhone 6 hotspot has WPA2)
I changed this
#define SECURITY_TYPE SL_WLAN_SEC_TYPE_WPA
to this
#define SECURITY_TYPE SL_WLAN_SEC_TYPE_WPA_WPA2
Nonetheless the aws example is not connecting and does not output anything else to the console or continue with the AWS Demo.
Does anyone have any advice or insight as to how to get around this?
How can I correctly specify my hotspot for use with this demo project?
Thank you!
Part Number: SN74CBTLV3126
E2E,
Could you help confirm whether 1:1 switch can be used as a Level Shifter like the diagram below?
I have signals on the A port come from the PCH (1.05V) and the signals on the B port go to an FPGA (3.3V LVTTL). Can you confirm?
Thank you,
Adam
Part Number: LAUNCHXL-CC1310
Dear TI Experts,
I am a master student at Polytechnique Montreal doing a research on a Z-wave protocol. Z-wave is a protocol that operates at 908.42 MHz in USA/Canada. It uses FSK modulation and NRZ coding. The data rate is 40kbit/s. I would like to aks you, whether CC1310 could be configured to capture the packets transmitted with this protocol? I've read that other researchers succeded in capturing Z-wave with TI CC1110DK-MINI development kit, however it's no more supported by TI and I couldn't find it in stock of any of the suppliers. I would be extremely grateful for your help!
Looking forward to your reply,
Dmytro Humeniuk
Part Number: BQ25120A
Part Number: AM3358
Void taskFxn(UArg a0, UArg a1)
{
UART_init();
UART_Params uartParams;
UART_Params_init(&uartParams);
UART_Handle uartHandle = UART_open(2, &uartParams); -->can't open
}
/*
* ======== main ========
*/
Intmain()
{
Task_Handle task;
Error_Block eb;
Task_Params taskParams;
Uart_appC7xPreInit();
if (Board_initUART() == false)
{
System_printf("\nBoard_initUART failed!\n");
return(0);
}
Error_init(&eb);
/* Initialize the task params */
Task_Params_init(&taskParams);
/* Set the task priority higher than the default priority (1) */
taskParams.priority = 2;
taskParams.stackSize = 0x4000;
task = Task_create(taskFxn, &taskParams, &eb);
if (task == NULL) {
BIOS_exit(0);
}
BIOS_start(); /* does not return */
return(0);
}
I use instance as 2. Is there limit on instance for UART_open to work? Thanks
Part Number: LMZ22010
The requirement is that the part must be able to be synchronized to an external spread spectrum frequency modulated (SSFM) clock source that has it's clock frequency spread over a bandwidth that is +/- 10% of the set frequency.
Do these 2 devices have that capability?
Thanks,
Lauren
Part Number: TPD4E02B04
Hello,
1. Can this be used for SATA 6gb/s
2. When routing the diff pairs, I see they can be routed under the NC pins. Can the NC pins tie to the signal in the PCB route or (only to ground or float). Wasn't very clear
Part Number: TPS65131
Hello,
The device datasheet states that the device has both an internal current limit over voltage protection and a thermal shutdown protection. What the datasheet does not explicitly say is what happens to the BSW pin during a fault. If a fault occurs will the BSW pin turn off the PFET?
Thanks,
John
Part Number: TAS5548
is it possible to drive the TAS5548 with an external clock (at XTALI) ?
My apologies if this isn't the most appropriate forum to ask this question, but I have found the response from users on this form to be extremely helpful in the past with my electrical questions.
I am new to impedance balancing so bear with me. I have a transmitter and receiver with 2000 meters of electrical cable connecting the two. The signal I am transmitting is a 3.3 volt digital signal. I am trying to impedance balance this network and a bit confused where to hook up my VNA. I drew a diagram below, is this correct? If I understand it, my VNA connects to the transmitter circuit while it is connected to the 2000 m transmission cable, which is then connected to the receiving circuit. Using my VNA and a Smith Chart, I will impedance balance the TX circuit with some "L" network including a certain value inductor and capacitor. After that is balanced on the VNA, I connect my VNA at the receiving end and do the same type of impedance balance.
Does this make sense or am I going about this wrong? Thanks for any input anyone has.
