Isolation spec that matters for noisy environments
The TLP2358(TPL,E) is a single-channel photocoupler from Toshiba that delivers 3750 Vrms isolation and a minimum common-mode transient immunity of 20 kV/µs. That CMTI figure is the spec that separates this part from generic optocouplers — it keeps the output from glitching when a motor-drive IGBT switches a few hundred volts in nanoseconds. The push-pull/totem-pole output drives 25 mA per channel directly into a gate-driver input or logic pin without an external buffer. Supply range spans 3 V to 20 V, so it works on a 5 V or 15 V rail with no level-shift resistor.
Timing budget for gate-drive and digital isolation
Propagation delay is 250 ns max, symmetrical for both low-to-high and high-to-low transitions. In a PWM isolation path that 250 ns eats into the minimum on-time — at 20 kHz switching, it's about 0.5% of a 50 µs period, so you'll want to account for it in the dead-time calculation. Rise and fall times are 15 ns and 12 ns typical, clean enough for a 10 Mbps digital signal without edge-slew concerns.
The 6-SOIC-5 package (4.55 mm width) is a compact footprint with 5 leads — the missing pin is the standard SOIC-6 no-connect at position 6, so the PCB layout is the same as a 6-pin SOIC.
RoHS compliant per the listing.