work in progress TLE6244

[AndreyB]

That's another of these MQFP64 low side drivers. This one has a detailed datasheet (attached)

https://svn.code.sf.net/p/rusefi/code/trunk/hardware/Breakout_TLE6244/
Breakout_TLE6244_schematic.pdf



18 channels total with direct control of 16 channels. About $2.5 @ Qty 10!

[kb1gtt]

If no one else takes the challenge to make this a KICAD, ping me once I get through the one I'm on. Me likes this chip.

[AndreyB]

10 pieces have arrived:

[DaWaN]

Nice!

Creating a KiCAD footprint / board for these chips is on my to-do list (I will not forget it), but time has been a bit sparse in the last two weeks.

[AndreyB]

Jared, it's a beauty!

First post has the SVN link and schematics, need some review before I order it.

[kb1gtt]

I'm concerned about it thermally. Those are some high Rds values. Based on Rds only I get the below graphic if everything is on.


The datahseet notes an Rth of 2 to 5, which is way high for that slug, so they must be recommending the attached heat sink be below 2 to 5 C/W. The spread sheet used the 5C/W, however I have no idea what we an achieve so it's something we'll need to pay close attention to. Either that or we'll have to keep the ambient below -5C

[AndreyB]

I know places with ambient below -5.

I guess the fact that duty cycle on some of these channels is only about 10% help a bit?

[kb1gtt]

Yes duty cycle and not using all channels can help quite a bit. I'd like to design the thermal such that you can run 100% if possible, such that it become one less item to worry about.

[pobedyst]

I have just recently renovated the control unit MED17.5, where just 6244 chip is used in the control channel of the low-pressure fuel pump. The failure of this chip is not uncommon for these control units, so I can only say that its use can cause some problems. But I'm not sure, because in the MED17.5 chip is used from the manufacturer BOSCH, its denomination is 30620, I do not know this analogue or BOSH simply orders with its marking data chips. I have not found, and it is unlikely to find a datasheet course 30620. Does anyone know what information is about how BOSCH uses its chips - are they complete analogues or for BOSCH specifically produce individual chips? Or is it the same thing?

[AndreyB]

random note: https://mhhauto.com/Thread-Bosch-Me9-7-can-communication-issue says

30566=30620=tle6244=48017=30536

no idea how far that goes