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Note: if you disable the safety relay in config, the ETC output function will NOT work (even if apparently enabled; The ETC PWM duty will read as 0%, and ETC driver output will be biased toward the fully closed position).
* Follow [VT Help] and make sure safety relay is installed in the system (config allows up to 5V "error" for PPS2 and TPS2, that is suitable only for initial setup, not for driving). |
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BD62220 is a 4 channel 2A push-pull output stepper driver for 1 bipolar stepper motor or 2 DC motors. Not sure how good the cooling is (rather small chip). * 0.85 Ohm and 2A: P = 0.85 * 2**2 * 4 = 13.6 W that is WAAAY beyond what a small chip like this can dissipate (without special cooling solution). Even 1A is a big questionmark if concurrently flowing through 4 outputs... 0.6A should be OK (max 1.28 W with some quiescent current). ** BD62220 could be nice for some printer stepper motor (possibly with current-limiting holding current using an external controller), but I would not want to drive an ETC solution with 1 BD62220 (or any similar sized chip, even with chip-top cooling) driving the throttle coils. (perhaps 4 chips, but than 9A solution could be better instead of 2A) |