hello, I have a question about MOSFET
I want 24v 3A motor control.
In detail, there was 24v 3A MOTOR for FAN and this MOTOR have a select switch for controlling motor speed
I want change this 'SELECT SWITCH' to 'IC SWITCH' (SELECT SWITCH too big for my PCB CASE)
I tried controlling maximum amp 5A mosfet, but mosfet temp too high.
I searched kind of "using high current mosfet for low current motor, less heat?"
and i found mosfet easy too buy and cheap enough for me.
IRFZ44N
and here is my cal
℃ ²
T + (amp, i need (3A) x Rds x juction)
25℃ +(3² x 0.0175 x 62)
= 25℃ + 9.765
= 34.765℃
it means if motor use 3A mosfet temp is 34.765℃ right?
So...
1. (For Not using heatsink)
5v MCU controlling that MOTOR with IRFZ44N + N chanel TR(like 2N3904)
is this possible?
2. If 5V control is not possible, is there any method? just using small VR like this (not using MCU)
I want 24v 3A motor control.
In detail, there was 24v 3A MOTOR for FAN and this MOTOR have a select switch for controlling motor speed
I want change this 'SELECT SWITCH' to 'IC SWITCH' (SELECT SWITCH too big for my PCB CASE)
I tried controlling maximum amp 5A mosfet, but mosfet temp too high.
I searched kind of "using high current mosfet for low current motor, less heat?"
and i found mosfet easy too buy and cheap enough for me.
IRFZ44N
and here is my cal
℃ ²
T + (amp, i need (3A) x Rds x juction)
25℃ +(3² x 0.0175 x 62)
= 25℃ + 9.765
= 34.765℃
it means if motor use 3A mosfet temp is 34.765℃ right?
So...
1. (For Not using heatsink)
5v MCU controlling that MOTOR with IRFZ44N + N chanel TR(like 2N3904)
is this possible?
2. If 5V control is not possible, is there any method? just using small VR like this (not using MCU)