I have used the IR2110 ever since IR offered the initial issue & development board.
I have been looking at going to the smaller FP , IR2104.
The thing I am not clear on is the wording, there is just VCC on the IR2104, not like the IR2110 that has VCC & VDD.
So if I am using Mosfets that require 10v - 12v for the gate, I assume the VCC requires this voltage, but it also seems to says that the inputs can driven by 5v logic.
Does this mean that it accepts both values for input when VCC is 12v?
Or am I reading it wrong?

 

A quick look at a reference design: https://www.buildcircuit.com/half-bridge-driver-based-on-ir2104/

 

But that doesn't appear to provide the answer?

 

But that doesn't appear to provide the answer?

Look at the input voltage range specification vs the logic voltage range specification.

SImply from the standpoint of being usable for a typical circuit you would expect it to take normal 3.3 -> 5 input signals.

 

Hope it does !

 

COM is "common" to input logic and output gate drive

 

COM is "common" to input logic and output gate drive

I realize that, that is not the issue, it is whether with VCC = 12v. can 5v logic input be applied.?

 

I realize that, that is not the issue, it is whether with VCC = 12v. can logic input be applied.?

IMO that would an insane chip design if it didn't.

 

IMO that would an insane chip design if it didn't.

Unfortunately, it does not specifically claim that, IOW, does the single supply replace the need as used on the IR2110 of using the correct voltage for both the input logic and the VCC boost, where 10v VCC is used on the IR2104 and the input can be 5v to 10v?

 

Unfortunately, it does not specifically claim that, IOW, does the single supply replace the need as used on the IR2110 of using the correct voltage for both the input logic and the VCC boost, where 10v VCC is used on the IR2104 and the input can be 5v to 10v?

I would need to find a more complete design with the chip to analyze.



This seems to give the value of logic low and logic high vs VCC.

 

Isn't Vih(min)=3V the answer to your question? Second table on page 3.
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d462533600a4015355c7c1c31671

 

I guess I will have to bring a couple in and experiment.
Will post the result.

 

The answer is in the description of the chip.

 

I guess I will have to bring a couple in and experiment.
Will post the result.

The answer is yes and it's right there in the datasheet. I don't understand why you can't accept that.

 

The answer is yes and it's right there in the datasheet. I don't understand why you can't accept that.

OK got it!

 

If I'm reading the datasheet correctly, the minimum Vin(high) is 3V. So 3.3V logic would have to drive its logic 1 output right up to the +ve rail. Seems a bit marginal?

 

I also see there is also an equivalent DGD2304 BY DIODES Inc.

 

If I'm reading the datasheet correctly, the minimum Vin(high) is 3V. So 3.3V logic would have to drive its logic 1 output right up to the +ve rail. Seems a bit marginal?

I would interpret it as the minimum (I.e. lowest) voltage that will be interpreted as logic high, so all voltages above that will be logic 1. (74LS00 is specified the same way). It’s not the minimum value of the logic threshold, but the maximum value of the threshold!
Certainly, not much noise margin on a logic 1 for 3.3V logic. I think I’d like to drive it with 5V.

 

I would interpret it as the minimum (I.e. lowest) voltage that will be interpreted as logic high, so all voltages above that will be logic 1. (74LS00 is specified the same way). It’s not the minimum value of the logic threshold, but the maximum value of the threshold!
Certainly, not much noise margin on a logic 1 for 3.3V logic. I think I’d like to drive it with 5V.

The Diodes Inc datasheet specs their version as 2.3V minimum for Vin (High)!

 

The Diodes Inc datasheet specs their version as 2.3V minimum for Vin (High)!

I’ve seen a similar device where TTL or CMOS thresholds could be selected (can’t remember who made it, Texas, perhaps)