Sequencers Forum - Recent Threads

UCD90160 sequence 18 voltage rails

Di Wang1 — Fri, 07 Jun 2013 10:34:45 GMT

Hi,

I see there are 18 GPIOs in UCD90160. Does it mean it can sequence 18 rails at most?

Thanks

UCD9081 I2C transition stretch issue

Max Han — Fri, 07 Jun 2013 06:27:32 GMT

UCD9081 I2C has a transition stretch issue in customer's projects.

if UCD9081 and other chips with SMBus function are connected to one I2C bus. During other chips with SMBus function thansfer data with master chip, if below conditions are all met, there will be a fault occured.

(1). stretch occurs when chips with SMBus transfer data with Master chip.

(2). stretch time is larger than 4ms.

(3). at the stretch ending time, the data on SDA line is just the same with UCD9081's address.

if all conditions above are met, UCD9081 will give a response because it faultly thinks this is an address. this response will make data transfering fail.

so how to prevent this falut response of UCD9081 occuring? could you give some suggestions?

UCD9081 is used in many this customer's projects, this issue result in many projects delay.

thank you!

UCD9090 GPI active low problem

Andrew Dyer — Mon, 03 Jun 2013 23:45:24 GMT

I am trying to set up a GPI on UCD9090 as active low. In off-line mode I can set this and 'write to hardware' with no problem. If I do the same thing on the real device connected with USB-I2C cable I get an error, the device resets and subsequent writes fail. After the error/reset the GUI reloads the settings from the hardware and I lose all the changes I've entered. To my mind there are 2 issues 1) why does the off-line and on-line modes behave differently? 2) is there some way to keep the GUI from losing changes when it reloads the settings after the error?

For the test below I changed GPIO1 from active high to active low and hit the .

1st message (copied to clipboard):

There was an error writing one or more parameters that are indirectly set by the Fusion Digital Power Designer:
GPI_CONFIG Write Inputs: Pin 4 GPIO1 ActiveLow Input,Pin 5 GPIO2 ActiveHigh Input,Pin 6 GPIO3 ActiveHigh Input,Pin 22 GPI1_PWM1 ActiveHigh Input,Pin 23 GPI2_PWM2 ActiveHigh Input,Pin 30 TMS_GPIO21 ActiveHigh Input,Pin 24 GPIO15 ActiveHigh Input,Pin 25 GPIO16 ActiveHigh Input [0x79858D454D6DA5AD4000000000]: NACK

2nd message (transcribed by me):

Fusion Digital Power Designer detected that the UCD9090 @ Adress 65d was reset. All device parameters will he refreshed when you clikc the OK button.

versions:
UCD 9090 ID string is UCD9090|2.3.5.0000|110701
USB adapter firmware 1.0.11
version 1.8.325 of the power designer software.

UCD90160 - 16 rails and ON / OFF sequencing of two groups

Adam Polus — Mon, 03 Jun 2013 22:22:53 GMT

I am at the detailed design stage of my project. I am using TI Fusion Digital Power Designer v1.8.325 in Offline mode (no board yet) to prove the schematic required logic can be implemented in the UCD90160.

I have got the complex project and I am strugeling with setup/configuration of the UCD90160.

Total of 16 monitored and sequenced rails.

Two rails shall be enabled in one after another sequence trigered on the Vin.

Other 14 railes are to be seqenced ON and OFF based on eather of two inputs.

I have got 1 rail which is to be part of the ON / OFF sequence, not monitored but PGOOD of this DC-DC conv to be sensed.

I have got 3 railes which are enabled but not monitored.

I have set all 14 to be sequenced ON/OFF railes as "control pin only".

Question1: Can sequencing be trigered by other input then PMB_CTRL or is it the only input which can trigger seqence ON and OFF.

Question2: I have managed to create required ON sequence (based only on PMB_CTRL) but I am unable to create reversed OFF sequence. This is becasue OFF sequencing isn't behaving as expeceted looking at the "timimg" graph (it is not behaving the same Sequence ON). Most but NOT ALL railes don't respond to seting its "sequence OFF dependency". Bug or is there some requirement that I have missed / haven't found???

Question 3: I expect that if all rails turn_off timing=5ms and Rail_1 is Sequence off dependency of Rail_2 and Rail_2 is Sequence off dependency of Rail_3 that on the PMB_CTRL going inactive in time=0ms then Rail_3 disabled @ t=5ms, Rail_2 disabled @ t=10ms and Rail_1 disabled @ t=15ms. Am I expecting correct?

Adam

Does UCD9081 EVM GUI support Window7-64bit?

Joe Ong — Thu, 28 Feb 2013 08:33:35 GMT

Windows 7 already uses .NET framework version 4.0, does TI have plans to support this?

Our instruction manual states .NET framework version 2.0 as the only support.

UCD9090 - UCD90SEQ48EVM-560

Rob Mitrunen — Fri, 17 May 2013 23:36:27 GMT

My customer has been battling my way through this UCD9090 part and it's GUI. they have come across a situation that I have so far not been able to resolve. They have assigned a 0.025 divider to MON11. When they enter the scale factor, or anything else lower than about 0.112, the reading just instantly drops to zero. Their MON8 connects to a divider for 12 V, uses 0.110 as a factor, and works perfectly.

They are using software version 1.8.318, dated April 9. Any ideas?

Lm3881 Cadj mininum

Owen — Mon, 20 Aug 2012 03:44:43 GMT

hi, all

I can not get the range of Cadj from its datasheet. Would you like to help me to get information about mininum of Cadj? Thanks!

UCD9090 program SVF file with JTAG

Nia Luan — Wed, 05 Sep 2012 18:06:43 GMT

Hi,

Any one did use JTAG to program SVF file into UCD9090?

I want to try the TJ 3717 / TSI but need more information on how to do it.

I have the UCD9090 Eval Board and did generate SVF via Fusion software. Next step is to use some JTAG programmer like Terasic Blaster (terasic.com) or BDI3000 from Abatron.

Best Regards,

Nia

UCD90160 Firmware version verification

AndreTseng — Mon, 06 May 2013 12:59:33 GMT

Hi sir,

Normally we can use PMBUS to check device ID. However I'm wondering is there any way to read device ID or firmware verion through JTAG interface?

Regards

Andre

UCC2946: Maximum watchdog period? Version with open drain or collector outputs?

Gilbert Pesant — Fri, 17 May 2013 21:02:53 GMT

Hello,

I am looking for a microprocessor supervisor circuit with watchdog, that can produce a 120s (nom) watchdog delay.

We also need industrial temperature range.

The UCC2946 is promising, but the spec doesn't show the max value (if any) for the watchdog timing capacitor (CRP).

Questions:

1) can a CRP = 4.7uF ceramic, X7R type capacitor be used, to produce a (near) 120sec nominal watchdog period?

2) is there a maximum value for CRP?

3) Do you have a version of this IC with open collector/drain outputs for RESET and WDO outputs?

4) Do you have other parts that can generate a 120s nom. watchdog delay (or close to that)?

Thank you!

BQ2954 power management IC

Ashik Das — Wed, 17 Apr 2013 02:10:22 GMT

Hello Sir/Madam,

I have question regarding your product BQ2954 power management IC. This following IC i am using for my University senior project to charge a 1-cell 3.7v Lithium-Ion battery. I used a circuit that is given on the data sheet (http://www.ti.com/lit/ds/symlink/bq2954.pdf). Also, i am using some of the replace parts according to it's similar specification. The replacement part i selected are:

FMMT3906 with 2n3906

FMMt304 with 2n3904

FMMT451 with TIP29

FMMT3904 with 2n3904

FZT789A with TIP32AG

I followed the exact circuit as shown in the data sheet (figure 3), however when i connect the rechargeable battery to out put battery terminal it shows the increase of current in power supply but at pin 2( CHG) there is no voltage and at pin3 BAT show low (0v). Also, the LED at pin 15 LED/CSEL show HIGH but at absence of battery it remain HIGH until i turn of the power supply. Please help me because i need to complete my senior project by MAY 7th.

Also,
1) We are connecting 1 cells in series, total battery pack voltage for the 1 cells is arnd 3.7V (arnd 3.3V per cell).

3) The reason we can't use a new IC as you suggested is because, this is our Final Year Project, and it ends this month by the end of may 7th. Thus we do not have enough time on our hand to implement a new circuit. So, since we have been researching and working on this bq2954 IC, we have almost got everything correct except this charging current. Thus,we hope to identify and rectify the problem with this IC itself, given the lack of time.

Some more info on our circuit when its charging the cells:
- Our bq2954 charger circuit is working on mode 3 (as set by the DSEL pin)
- When our battery is connected and the circuit is switched on the following is our LED statuses:
LED 1: ON

LED 2: OFF

CHG pin LED: OFF

BTST pin LED: ON
- And when our switched on but the battery is not connected, the following is our LED statuses:
LED 1: ON

LED 2: OFF

CHG pin LED: ON

BTST pin LED: ON
Thank you

UCD90120A watchdog input pulse width minimum time

Robert Rau1 — Tue, 16 Apr 2013 18:31:51 GMT

The data sheet references Twdi many times but the electrical specifications do not mention the minimum Twdi pulse width (low or high).

What is Twdi minimum low time?

What is Twdi minimum high time?

UCD9081 EVM not working / not detected

PS Narayanan — Thu, 11 Apr 2013 20:36:18 GMT

The UCD9081 EVM board is not detected by the PC I am using.

I downloaded the SW from the net, GUI version 3.0.0.15 from the web.

When I power up the board and it is attached to the PC, the SW is not able to

detect the UCD9081 (On the bottom right of the screen, I get a message that Windows

has installed the SW successfully).

I tried the ‘discover device’ option’ , the board still does not get detected.

I am using a Windows 7 PC.

Anybody have the same experience ? and found a solution?

Please let me know.

Thanks,

PS Narayanan

i bought a parts onreels,but der is no label marking,only i can see is d topmarking to56,for this topmarking what is d correct full part id?????

jovzz deelao — Tue, 02 Apr 2013 13:02:45 GMT

to56

UCD9090 Datasheet mistype?

Alexey Grehov — Thu, 21 Mar 2013 12:10:05 GMT

On page 26 of datasheet we have:

*****************
Power-Supply Enables
During reset, the GPIO pins are high-impedance except for FPWM/GPIO pins 17–24, which are driven low. External pulldown or pullup resistors can be tied to the enable pins to hold the power supplies off during reset. The UCD9090 can support a maximum of 12 enable pins.

NOTE
GPIO pins that have FPWM capability (pins 10-17) should only be used as power-supply enable signals if the signal is active high.

****************

Should it be pins 10-17 in both cases?

Monitoring Voltages with Scaling Circuits

John Morton — Wed, 08 Feb 2012 19:36:52 GMT

Hi,

I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2.5v so I have scaling circuits so as not to violate the 2.5v max on the Mon inputs.

My question is, do I enter the raw voltage values in Fusion for such things as over/under voltage fault/warning or do I use the scaled values? Are there provisions within Fusion to enter the scaling factors?

Thanks,

John M.

Beagleboard I2C connection to UCD90xxx

Ted Lane — Wed, 06 Mar 2013 19:32:52 GMT

Has anyone used a TI Beagleboard or Beaglebone to control a UCD90xxx sequencer via I2C/smbus?

Ted

UCD9081 doesn't drive outputs

Kirill Stepanov — Tue, 19 Feb 2013 13:51:53 GMT

Hello,

continuing the theme "UCD9080 abnormal state" (http://e2e.ti.com/support/power_management/svs_and_sequencers/f/212/t/241394.aspx) - we've changed UCD9080 sequencer to UCD9081 and get a new problem.

I am trying the configure a TI UCD9081 power supply sequencer/monitor in following configuration:
- sequencer monitors five inputs from MON1 to MON5;
- sequencer drives five outputs from EN1 to EN5; every output ENx drives by appropriate input MONx;
- outputs EN1-EN4 active at low level, EN5 - at high level;
- every output ENx becomes active after delay after corresponding input MONx achieves regulation (becomes in UnderVoltageThresholds-OverVoltageThresholds);
- sequencer uses external reference 3.3V;

Once sequencer was installed and powered up without configuration, EN1-EN4 was at high level, EN5 was at lo.

After programming whole configuration (see attached file; an address space starts at 0x200 instead of 0xe000 cause file was read from 8bit host microcontroller, however ucd9081 is configured like datasheet describes) ucd9081 continue to hold outputs at passive state (EN1-EN4 - high, EN5 - low);

I can’t seem to get the ENx pins to do anything except sit at a passive state.

It seems to me that udc9081 monitors input voltages correctly:
- input voltage for EN1 = 1.650V, corresponding value RAIL1H:RAIL1L = 0x01fe (suppose 1.65/3.3*1024 = 0x200);
- input voltage for EN2 = 1.18V, corresponding value RAIL1H:RAIL1L = 0x016d (suppose 1.18/3.3*1024 = 0x16e).

STATUS register is equal to zero forever, RAILSTATUS register is also zero.

I tried to reset flash error - but it has no effect.

If someone could help me configure the sequencer I would be appreciated.

Thank you,

Kirill

(Please visit the site to view this file)

UCD9081 I2C Address ISSUE

Diljith Maviladeth — Wed, 20 Feb 2013 13:00:28 GMT

Hi,

I am using UCD9081 in below configuration(sch attached).

We are seeing that, whatever address is driven on the ADDR pins, Ti's GUI always discover the device at address 0x60.

The ADDR pin is driven from the back-plane geographical Address pins through a buffer. I probed the ADDR pins and found that the buffer is driving them correctly. But UCD9081 does not seem to read the address from the ADDR pin.

We are stuck as we have 3 boards with UCD9081 in the backplane. The I2C bus is shared by all devices. And addressing is driven from geographical pins on backplane.

Thanks.

UCD90120A Fault Response

StuartT — Wed, 13 Feb 2013 16:43:51 GMT

Hi,

I'm using a UCD90120A to sequence and monitor 8 on-board voltage supplies and I have 2 questions about the operation under fault conditrions.

Q1. The 8 supplies are enabled and monitored individually and this works OK. However, I can't get the OV/ UV faults to perform the shutdown response I'm after (i.e. the faulty supply enable line is disabled).

In the Fault Responses and Limits tab, I've set Vout Over and Under Voltage set to "Shut down with delay" and "do not restart". I would therefore expect the fault to be detected, and the supply will be shut down.

To simulate a fault, I've changed the expected Vout value on one rail, and this update is then written to the hardware (which is my actual board rather than an eval card).

I enable the UCD90120A start-up (which is controlled via a GPI) which sequences the supplies. The supply I've altered measures the same as it did (which is correct), but it should now be considered as out of spec and turned off. However, it stays on. Can you advise what I might be doing wrong?

Q2. In addition, the UCD90120A monitors 3 external supplies. There are no enables associated with these (and they're set to Auto On/ Off), and the 90120A starts monitoring these when the 3V3 (i.e V33A, V33D, V33DIO) powers up. If any of these are out of spec, I want the enables for the 8 other rails to be switched off. Can this be done? I don't even seem to be generate a UV or OV fault on these 3 supplies, even though this appears to be possible. It seems that using one rail status to control a different rail enable might only be possible if supply which has the status is also switched off. However, in my design the UCD90120A does not control these 3 supplies, it only monitors them. Can you advise please?

For information, I'm using Fusion Version 1.8.284 on Windows 7 to interface with the UCD90120A on the PMBus.

Thanks

Stuart

UCD9081 actions on rail down need documentation.

Eugene Krakow — Tue, 12 Feb 2013 20:23:31 GMT

Tech Support this is a copy of an email I sent last week to your support who took two days to tell me to post it on the forum, so a prompt reply here would be appreciated. This input data is not only not letting me paste in pictures, it is also cropping them, so you'll have to open the documents to view the tables I am posting here, or I can just email you the email I originally sent to tech support (or you could fix this site).

This is from page 20, Section 4.2.3 of the SLVA275B Rev. Nov 2010 (Most recent on website)

This if from Page 11 of the datasheet for the UCD9081, SLVS813B Ver. Dec 2010 (Most Recent on website)

Here are the same options in the GUI:

I am looking for some documentation on settings for the options that are still listed as reserved (eg retry continuously, sequence after shutdown) I could obviously figure this out through the GUI without a lot of effort, but to keep my documentation clear and concise, I would rather point to a TI provided document.

UCD9090 input for power interrupt?

Shashank Reddi — Thu, 07 Feb 2013 21:39:08 GMT

Hi Team,

We need to generate an interrupt when the power goes off so that we can shut things down in an orderly fashion. I'm wondering if we could use the one last spare input to the UCD9090 to warn of pending power failure?

Best Regards,

Shashank

UCD90120A f(PCLK) Internal oscillator frequency range

Chris Hayes — Wed, 06 Feb 2013 17:33:52 GMT

Hi,

Datasheet (SLVSAN9 –APRIL 2011) suggests the range of the internal oscillator is 240 to 260 MHz measured at TA = 125°C & TA = 25°C.

Is there any data to indicate what the variation below TA = 25°C down to TA = –40°C ?

Thanks,

Chris

UCD90120A PMBus Addressing

StuartT — Wed, 06 Feb 2013 12:20:24 GMT

Hi,

My original design had a UCD90120 and I had the PMBUS_ADDR(1:0) resistors both as 47K5. According to Table 5 of the UCD90120 datasheet (SLVS966, Sept 09) this would give address bins of 6. Using the PMBus Address Equation, this would give an address of 78 dec.

However, it was noted that the UCD90120 wasn't recommended for new designs so I switched to the UCD90120A, and this is what I have fitted on my board.

The PMBus address resistor values change between these devices but I didn't notice this right away. As such, I still have the 47K5 resistors fitted. Table 9 in the UCD90120A datasheet (SLVSAN9, April '11) doesn't have 47K5 resistors as an option.

When I use the Digital Fusion tool, it correctly detects the device and identifies it as a UCD90120A, with address 78 dec. This address is what would be expected using the original UCD90120 version, but it's not clear what I should really expect with the non-preferred values when using the UCD90120A part.

Can you advise how this might still be working despite having incorrect resistances? All other functions appear to be working.

Thanks

Stuart

UCD9090 with a pair of TMP101 on the same bus.

Shashank Reddi — Thu, 24 Jan 2013 22:20:26 GMT

Hi Team,

Customer has an existing power management IC, UCD9090. They need to add a pair of TMP101 and need to put them on the same bus as they are short of available IO in that area.

Looking through the data sheet, it is not at all obvious whether they are compatible or not. Customer knows the address of the UCD9090 can be steered all over the place to avoid conflicts. They're just not sure about putting the TMP101 on a PMBus or not.

Will this work?

Thanks,

Shashank