Digital Power

Forum Post: RE: PMP7256 BOM list

Brad — Fri, 17 May 2013 17:52:00 GMT

Here is the BOM with the columns expanded so that entire contents can be read.

(Please visit the site to view this file)

Forum Post: UCD3028 GPIO question!

you lee1 — Fri, 17 May 2013 06:09:00 GMT

Hi sir

I want to use UCD3028 14th PIN(GPIO14_PMBusAlert pin) as an input pin, but did not find the relevant registers.

I don't know how to configure that pin!

who knows?

thanks

lee

Forum Post: RE: SLUUAD8 is not found！ UCD3138064 programmer's Manual is not available!

decai wang — Wed, 15 May 2013 02:59:00 GMT

I had got this documents from local site.Thanks.

Forum Post: UCD3138 projects immigrate from ccs3.3 to ccs5.x now?

decai wang — Sun, 12 May 2013 08:06:00 GMT

I had seen that this immigration will be done in may,2013, how is getting along with this?

Forum Post: Multiphase converter using UCD9224 and UCD74111

Ashok Narayanan — Tue, 07 May 2013 17:11:00 GMT

Hi ,

Kindly review the design and configuration file for our 4 phase 1V supply using UCD9224 and UCD74111.

The specs for the design are:

1. 12V to 1V @ 48 A (SoC requires only 40A)

2. 4 phases at switching frequency of 700KHz

3. No phase shedding at low loads

4. Current sensed using 2mOhm sense resistor

5. 1V Enabled using the the seq1 pin (Active High)

Schematic: (Please visit the site to view this file)

Configuration: (Please visit the site to view this file)

Also, Please share with me any documents about layout guidelines for the power driver UCD74111.

Thanks

Ashok

Forum Post: RE: Running multiple USB-to-GPIO adapter on same Windows-XP machine

Brad — Tue, 07 May 2013 16:58:00 GMT

I don't beleive this is possible but this isn't my area of expertise.

What is your application that requires 8 adapters?

Forum Post: UCD7242/UCD9222 Ground Topology Layout Questions

David F — Tue, 07 May 2013 16:06:00 GMT

We are currently doing layout verification on a UCD7242/UCD9244 power supply for a pair of C6657 processors (about 3A per channel).

There is some confusion regarding ground plane connections.

1. According to the datasheet, the UCD7242 BPCAP pin should decouple to logic ground. It is, however, locally connected to both grounds in the layout example (Figure 20). Seeing as BPCAP supply is produced from VGG (PGND referenced), should it not also reference (decouple to) PGND? This has been mentioned elsewhere in this forum, but never validated by TI.

2. Further, on the C6657 eval platform, the BPCAP pin decouples to a PGND island pour. This island pour also connects through all GND stitching vias to all other GND layers. This is in sharp contrast to the datasheet example (Figures 20-23) which shows no such connections other than one connection at R35/C31 (BPCAP/AGND/PGND) ground node. This seems insufficient in terms of tying PGND to logic ground.

I would expect to see lots of via stitching at both input and output GND/CAP points. What is the recommended approach for tying the PGND island to other GND layers, or is a separate PGND island and single point connection even appropriate for a board with many circuit elements?

Forum Post: RE: Multiphase converter using UCD9224 and UCD 7242

Ashok Narayanan — Fri, 03 May 2013 19:56:00 GMT

Hi ,

Kindly review the design and configuration file for our 4 phase 1V supply using UCD9224 and UCD74111.

The specs for the design are:

1. 12V to 1V @ 48 A (SoC requires only 40A)

2. 4 phases at switching frequency of 700KHz

3. No phase shedding at low loads

4. Current sensed using 2mOhm sense resistor

5. 1V Enabled using the the seq1 pin (Active High)

Schematic: (Please visit the site to view this file)

Configuration: (Please visit the site to view this file)

Also, Please share with me any documents about layout guidelines for the power driver UCD74111.

Thanks

Ashok

Forum Post: How to control the power supply

Penn — Thu, 25 Apr 2013 09:35:00 GMT

Hello，

we know that the square signal as the input in the differential circuit,a sharp wave at the output side can be get, especially it has a very short rise time,but the fall time is too long.

The first step: I want to get a signal which has short rise time such as differential and fall time, meanwhile,the amplitude of the signal must be controlled.

The second step:I need a signal such as pulse signal.but its duty ratio, amplitude, rise time and fall time are controlled.

Could you give me some guidance and advice about my project?

Best wishes

Regards,

Penn

Forum Post: RE: UCD9244+UCD7242 power supplies for 6678

LBJ — Wed, 24 Apr 2013 01:18:00 GMT

l am in great need of your help ,thanks

Forum Post: RE: Problem with UCD9248 and UCD7232

Peter Scott — Mon, 22 Apr 2013 11:44:00 GMT

Actually I have solved all the problems above, except the 7232s faulting.

Can someone list the possible causes of a fault signal.

I know the following reasons for flt

1: low vin

2:high voltage drop across the high side fet tblank after its turned on.

3:the voltage on the cs p&n pins over the ILIM value. Does the 7232 multiply this differential by 49 or 98, I have seen both in the documentation?

Any other possible causes?

Many thanks

/Peter

Forum Post: 9244 PWM=1.65v

LBJ — Thu, 18 Apr 2013 07:23:00 GMT

hi ,experts

I use UCD9244 and UCD7242 to provide power supplies for TMS320C6678,but why the PWM pin of the 9244 is 1.65v, i kown this will shut off the high-side MOSFET and the low-side MOSFET,which will produce 0 output of the rails.who can tell me why?

when i produce a PWM wave (1MHZ,duty cycle=10%)to the 7242 without the 9244 pwm input to 7242,but i still get a 0 output.i can't understand the result,can any expert give me some advices?many thanks!!

Forum Post: UCD3040 Phase shift full bridge AC/DC power supply

Raymond Huang — Fri, 12 Apr 2013 18:25:00 GMT

In a phase shift full bridge AC/DC power supply application, UCD3040 DPWM1 and DPWM2 used as full bridge primary drive outputs. In such configuration, if the event1, event2, event3 and event4 register of DPWM1 and DPWM2 able to be updated upon variation of power supply output loading?

Forum Post: RE: UCD9240 droop compensation

Russ Dill101288 — Fri, 12 Apr 2013 17:27:00 GMT

Found a way to get closer to the load.

Forum Post: UCD3138

Jia Du — Thu, 11 Apr 2013 12:44:00 GMT

Hello ,i have got ucd3138LLCEVM but there are some errors in the program code.The control loop does not run.Please send me the the ucd3138LLCEVM reference code . thanks! my email address :1198073779@qq.com

Forum Post: Can UC3138 support cascade control? inner control loop and outter control loop

decai wang — Thu, 11 Apr 2013 03:07:00 GMT

Forum Post: RE: UCD3138 Getting Started & Sample Code

Jia Du — Wed, 10 Apr 2013 13:47:00 GMT

hello ,i have bought ucd3138LLCEVM but there are errors in the program code.Please send me the the ucd3138LLCEVM reference code . thank you very much!

my email address :1198073779@qq.com

Forum Post: RE: Fusion Digital Power Designer - How to export an SVF file?

Brad — Tue, 09 Apr 2013 19:42:00 GMT

Using the Program file option is a common issue, which is why I had the GUI designer hide those functions for the upcoming release.

The reason for being connected to a live device when exporting an SVF or Hex file is that it requires direct access to the DFlash memory which is not available offline.

Forum Post: UCD9222 programming

Reza Zolhayat — Sun, 07 Apr 2013 03:04:00 GMT

Hello,

I work on ICT project and our customer (Sonus Network) requires to program UCD9222.

Our tester platform is Agilent 3070 and would like to know how to fulfill our customer requirement.

Do we need an external programmer to do this or can use BSDL model with one specific tools which converts to

Agient 3070 input (VCL or PCF fromat).

Forum Post: RE: UCD3138 for full bridge LCC

decai wang — Tue, 02 Apr 2013 06:51:00 GMT

It seems that many power engineer still like to design SMPS with traditional method, can you give me some tutor how to use UCD digital power controller in SMPS？

and I also want to know which is better between UCD3028 and UCD3138, 3P3Z in UCD3028 may be more flexible than 2P2Z in UCD3138？