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By dazq
#45881
That device looks worse imo.
Mostly the data sheet talks of vin at 5v (vin thresh is 5v typ too).
By R42BUG
#45885
dazq wrote:
Thu Oct 15, 2020 8:10 pm
That device looks worse imo.
Mostly the data sheet talks of vin at 5v (vin thresh is 5v typ too).
Datasheet say min 3v max 5.5v or I'm missing something?
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By R42BUG
#45898
NickZ wrote:
Fri Oct 16, 2020 9:43 am
yes, thats the voltage range for the Source/Drain not the GATE threshold to turn on.
Ok now I'm more confused, I don't have many experience reading datasheets so please be kind.
In datasheet in fig 1 internally is a mosfet so I'm asume source/drain is GND/OUT and gate is IN , in fig 3 IN is Vin and OUT is Vout and un fig 2 Vout rating : -0.3v to 42v. , Vin : -0.3v to 7v and a 3 amps limited current. So if you can explain what I'm doing wrong please.
thanks.
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By PSIG
#45908
Random comments:
"Absolute Maximum Ratings" is not useful for planning suitability of the component, except when something goes horribly wrong.
While the part indicates 3V to 5V signal voltage, the ratings clearly indicate 5V is intended, 3V will work for function, but will have a large impact on the current it will carry (large reduction in current before overheat).
Capacity in most of these cases is not strictly "amps" but RDS(ON), which limits by calculation how much the device can handle without overheating. That limit may be below the current limiter in your application and design. ;)
Inductive loads (solenoids, incandescent bulbs, etc) are especially hard on devices like this, and require careful planning and calculations for a good choice.
Use your basic MOSFET calculations for power, resistance and watts versus degrees/watt (thermal resistance) spec for your design.
Don't guess, or believe the sales pitch, or take perfect laboratory condition limits as guidelines. Calculate. The results will likely be far different than your expectation.

Hope that helps.
By R42BUG
#45952
PSIG wrote:
Fri Oct 16, 2020 9:50 pm
Random comments:
"Absolute Maximum Ratings" is not useful for planning suitability of the component, except when something goes horribly wrong.
While the part indicates 3V to 5V signal voltage, the ratings clearly indicate 5V is intended, 3V will work for function, but will have a large impact on the current it will carry (large reduction in current before overheat).
Capacity in most of these cases is not strictly "amps" but RDS(ON), which limits by calculation how much the device can handle without overheating. That limit may be below the current limiter in your application and design. ;)
Inductive loads (solenoids, incandescent bulbs, etc) are especially hard on devices like this, and require careful planning and calculations for a good choice.
Use your basic MOSFET calculations for power, resistance and watts versus degrees/watt (thermal resistance) spec for your design.
Don't guess, or believe the sales pitch, or take perfect laboratory condition limits as guidelines. Calculate. The results will likely be far different than your expectation.

Hope that helps.

Ok, I believe I understand how to select the right one.
What you think about this VNS3NV04DP-E
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By JHolland
#45957
R42BUG wrote:
Wed Oct 14, 2020 8:03 pm
What do you think about this BM2LC120FJ-C for replace the VNLD160
Vin is from 3 to 5.5v
It looks to be perfectly adequate. What spec are your injectors?
By R42BUG
#45965
JHolland wrote:
Mon Oct 19, 2020 10:51 am
R42BUG wrote:
Wed Oct 14, 2020 8:03 pm
What do you think about this BM2LC120FJ-C for replace the VNLD160
Vin is from 3 to 5.5v
It looks to be perfectly adequate. What spec are your injectors?
I need to buy new injectors or made driver board for peak & hold injectors rigth now I have 65 lbs/hr 2.8 ohms bosch injectors
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