I'm looking to PWM an LED strip with an ESP8266 (3.3 V PWM signal) with the following characteristics:
- Red channel: 12 V, 300 mA
- Green channel: 12 V, 250 mA
- Blue channel: 12 V, 250 mA
As I understand it, a MOSFET is best suited for this task, so I've been reading as much as I can to understand which specific parts might be suitable. Ideally I would like a through-hole component, but these seem harder to find, so I've got some surface-mount ones in the list too. This is what I've come up with:
- BSS816NW
- ❓ Only slight concern is that graph 5 doesn't show a \$V_{gs}\$ greater than 2.5 V. Am I missing something here that would make this unsuitable?
- 👎 It's SMT, which isn't my first choice.
- 👍 Low \$R_{DS(on)}\$ resistance, which is good.
- TN0702
- 👎 It has a higher \$R_{DS(on)}\$ resistance.
- 👍 It's THT!
- 👎 It's expensive!
- FDN337N
- 👎 It's SMT.
- 👍 Low \$R_{DS(on)}\$ resistance.
I'm leaning towards the TN0702 as it meets my THT criteria, but could use one of the others if necessary. So my question is: Are any/all of these components suitable for the job? I've not used MOSFETs before and am quite inexperienced with electronics, so would be grateful of any advice.
