Community Information Forum Discussions

Hallo,

i have some question to the "Angle Revolution Register".

I am already reading the "Angle Value Register" very well and now i want to read the the revolution of my motor. The motor shaft runs with 50 rpm.

Here are my Code example:

void RevolutionOutput(void)
{
unsigned Frame_Counter;
int Num_Revolution;
int miso_data = (spi_read(angleRevolution_command));//& 0x7FFF);

Num_Revolution =0x00FF & miso_data;

Serial.print( "\t\t Aktueller Umlauf: ");
Serial.println(Num_Revolution);

}

My Problem is that the sensor give me every second turn around of my motor an increment.

Is it Important to use the Frame_Counter?

Please can anyone helb me?

Sorry for my bad english iam learing:)

best regards

Vita Show Less

Here is the data sheet for the Infineon BS50015-1TAD Smart High Side Switch - http://www.infineon.com/dgdl/Infineon-BTS50015-1TAD-DS-v01_00-EN.pdf?fileId=5546d46253a864fe0153d1e0871b3e34

I have a prototype 3-channel switch system using this device as the power switches for three circuits normally switched by a three-ganged manual switch
I'm having problem where the switches will turn off if the load changes. The only way to reset is to remove Vin and re-apply.

Vin is at VS potential - common control signal is fed through three independent 4k7 resistors to each of the Vin terminals of each device; there is also a 0.15uF capacitor between pin 2 & pin 1 (ground); I have a local 15V TSV connected between the Vs input terminal and ground on each device.

I have eliminated my control circuit, by applying battery voltage directly to the inputs via the 4k7's; Vs is Constant supply from battery;

What happens is that the switches turn on when Vin is applied;

Initial load conditions at turn-on are
There is a given load on circuit one of about 10A;
there is a smaller load on circuit 2 of about 1A
There is open load at this stage on circuit 3 (this circuit feeds ancillaries that have series manual switches or relays i.e. brake light switch, horn switch, turn signal switch)

What I had found was initially was during engine starting the engine would start and immediately shut down the ignition circuit (and in the process shut off one or more of the other switches also). This would not happen EVERY time but quite often.
What I found is that Vin was still active 'hi' and had not changed state.
Although it did not appear to control circuit problem I bypassed it anyway, giving the inputs a direct manual switch to Vs.

With my manual switch operating Vin, I then found that, without even attempting a 'start' I could get the power switches to trip just by turning the headlight load on/off/on or changing it from high beam to low beam to high again in cycles; or on circuit 2, simply turning that circuit's "kill" interrupt switch on or off
And when I thought further about it, the condition whereby they were tripping during engine start procedure actually also mimics this situation - this is actually a motorcycle and to maximize current capability for starter, it turns off the headlights while starter is running.
i.e. what was happening was, at turn on, all circuits enable as expected; press start button (headlight current goes off and starter runs) - engine starts, release start button, headlights come back on and circuit trips (sometimes all three circuits)
I have actually been able to make one of the other channels trip just by using the turn signals (where clearly it is applying and disconnecting the load)

Now - none of these currents are anywhere near max limits

Here is the bizarre part - the high current headlight circuit itself might not be turning off (when operating the lighting on/off or switching high to low) but one of the other channels (which actuates the relays that then switch the output power to the actual load)

To clarify that configuration - circuit 1 feeds current via relay switched contacts on the output of the smart switch to the headlights; circuit 2 feeds power from output of that smart switch, via manual switch to the relay coil of the relay which is the aforementioned interrupt for the first circuit load.
So when operating the switch on output of circuit 2 to turn those relays coils on or off, THAT is the circuit that trips, NOT the high current circuit itself (note that sometimes the high current circuit 1 might also/alternatively be the one that trips)

So:
it does not appear to be a current overload that is causing the trip
Vs is not being disconnected, nor does it fall below the Vs (ext) or Vs (uv) thresholds
There are however changing conditions from load to no load (open load if you will)
There are small inductive loads (automotive relays - but using diode suppressed relays)
Vs has 15V TSV locally at each device

I also attempted to give a small fixed load (1k0) on each output so there was at least some current out of each device (ie so they are never completely open load) - this made no difference

Any suggestions as to what is causing the problem of the devices tripping off would be most appreciated - and how I can eliminate this!

One thought I am having is that I did not employ a Vs Snubber circuit and starting to think that it is transient on the Vs side that is causing the issue
- for example, in the diagram below, the common VS connection to circuits 2 & 3, both will trip off together, even though the other circuit has no load changing condition.
Is that possibly the issue? i.e. Would omitting this cause this issue (or conversely, if I employ it, will it resolve it? Or do I have something else going on.
The application guide suggests a 3.9 ohm/4.7uF series snubber between VS and Ground (locally) - I did not include this, space was becoming tight on layout and didn't think it would be necessary, especially with the TSV
Maybe I underestimated it!
I also see in the application guide, the alternative snubber arrangement of a small capacitor of 100nF between Vs and ground pin, coupled with small resistor (4 ohms) between ground pin and actual ground.
Which of these would be best?

But any other suggestions would also be most appreciated


Here is simplified scheme


Show Less

Hi
I was recently downloading Dave 4 on my macbook for my offline Windows PC --> the problem was that the submit button is behind the Infineon Privacy Policy link so can u please put some space between them just for better visual look?
Btw you can click it with tabulator on your keyboard !

Best regards Stefan Show Less

Hello,

We are using the TLS850F0TAV33 regulator in an ECU design for automotive. An option to disable the watchdog of the TLS850F0TAV33, for the microcontroller starting or in a
special mode, is the Watchdog deactivation by WI, settting a voltage between 1.15V 1.4V at input WI (Watchdog Input).
We have designed a solution with a voltage divider, a 3-state buffer and a flip-flop but would like to know if there is any related application note.

Thanks Show Less

Hello all ,
I have a question to ask. I’m going to buy a new home automation system and the one I have chosen is SleepWell home security systems. I have gone through their website and noticed this feature but couldn’t understand more about it. Can anyone tell me what this is? Do anyone of you guys have an experience buying this product.Please help me……. Show Less

Hello,

I'm shocked and very upset that Infineon has announced EOL for all its discrete small signal parts!

If it where so, that there would be other companies producing 1:1 replaceable parts, there would be only the problems finding them and do requalification for products where our customers require that for quality paper works.
But for many parts there is no 1:1 replacement!
So we will have to do redesigns for many of our products!
We are left alone by Infineon, with a huge unplanned investment ahead!

How can a company, known for it's reliability, ruin its good reputation with such a total EOL of a complete product range?

Other companies have founded daughters in that case, that take the whole product range for the future!
Why not Infineon?!

If it would care Infineon any how, I would be tempted to tell them,"I will not buy your other parts, if you let us down so hard"!

Cheers
Michael Show Less

For the part ITS42008-SB-D, if the LS pin is connected to high (Vs, 24V), what would be input turn ON and turn OFF voltages.
In the datasheet it was mentioned with respect to Vst (but what is Vst)

If the Vs = 24V, then are the following threshold levels correct

a. Input turn ON threshold: 13V (min) to 24V (max)
b. Input turn OFF threshold : 0V (min) to 11V (max)

Are the above levels are correct if the Vs = 24V.
Can we apply Vs (24V) directly on the Input pins. Please confirm Show Less

Hi everybody,

I see that the Infineon smart high side switches provide battery reverse protection, by connecting a 150 ohm resistor in GND as a current limiter.
Just as a reference see the note at the bottom of the first page in the ITS711 datasheet.

http://goo.gl/UYabFM

Nothing is stated about the power dissipation of this resistor, but, from the diagram at page 9 of the same datasheet, it appears to be

(Vbb - Vtvs) ^2 / 150

This is 5.68W, with 30V reverse battery voltage and an estimated 0.8V drop on the internal TVS diode, and then quite a large value.


Is my estimation correct?

Many thanks in advance for any comment.


Marco Show Less

ISO1I813T EVAl board documents having following description. I have found description that ISO1I813T can be used in direct mode also. (See blue highlighted text)

I have not found any documents how can I use ISO1I813T in direct mode? do you have any documents/application note which shows ISO1I813T working in direct mode.

-----------------------------------------AN_Eval_2x8_ISO1I813T_V10----------------------------
Application
This Application Note describes an Evaluation Board with two isolated 8 Channel IEC61131-2 compatible Digital
Input ICs for a wide range of industrial applications.
The board is designed to allow easy exploration of the features of the ISOFACETM Digital Input part. It contains
two ISO1I813T as an electrically isolated 8 bit data input interface in TSSOP-48 package. These parts are used
to detect the signal states of up to eight independent input lines according to IEC61131-2 Type 1/2/3 (e.g. twowire
proximity switches) with a common ground.
An 8 bit parallel/serial μC compatible interface allows to connect the IC directly to a μC system. The input interface
supports also a direct control mode and is designed to operate with 3.3/5V CMOS compatible levels.
The data transfer from input to output side across the galvanic isolation uses Infineon’s Coreless Transformer
Technology

-----------------------------------------AN_Eval_2x8_ISO1I813T_V10------------------------------- Show Less