Dan wrote:Testing of the MC34152 ondifferent levels of supply voltage (5V, 12V, 14.4V, etc).
I do not want to be rude but....do you know the MC34152 features a undervoltage lockout at 5.8V?
No, not rude at all. Glad to hear someone else is looking at this also.
I overlooked this, as I just assumed it had the same supply voltage as the TC4427A. I have confirmed that the minimum supply voltage is 6.5V as per the datasheet.
Dan wrote:.... MC34152 (replacement for MC33152) ...
The ON site doesn't seem to list the MC34152 as an active part number (only the MC33152 and NCV33152). Also, the MC34152 is only rated 0 - 70C.
Thanks,
Huff
Huff,
I don't have time to comment RE: active/non-active part, but you are correct, the MC34152 is only 0 - 70C, the MC33152 is -40 -85C and the MC33152V is -40 - 125C.
Driving 1 or 2 channels makes no difference: expected.
Using less than 50 ohm on the TC4427 is no go: expected. (1.3V @ 10ohm explains my speaker quietness LOL)
Using less than 50 ohm on the MC33152 works: unexpected.
Performance doesn't degrade appreciably at 15V compared to 12V: expected.
Current delivered at 5V is, best case, far from good enough for a BJT ignitor and only suitable for logic inputs: expected, known for 2 years+, hence this thread.
From that I'd say that 150 ohm might be the best choice if using the TC4427 part, as 200 may be a little weak and 100 may be a bit too high in dissipation.
Dan, how were they heat wise? I imagine cold to luke warm except for TC4427 @ 10 ohm.
Fred wrote:
Dan, how were they heat wise? I imagine cold to luke warm except for TC4427 @ 10 ohm.
Fred.
Yeah thats pretty much correct. I didnt notice any difference to ambient until i went less than 47R. Agreed RE 150R resistor valu suggestion. Even 100R would be fine though.
100 means we need a bigger resistor than we can stomach. 200 means our drive will be borderline. 150 is a nice compromise once you include the internal RDS on of the driver.
Are there any suitable, cost effective, 5V capable alternatives around? TC4427 is certainly a solid choice, though. I say we roll with it for this generation.
