**broken link removed**
..according to this, load dump can be up to 120V.......rating the entire led driver circuitry to be able to run off that seems unreasonable since the dump is only 400ms max...i'd say, switch it out with pfet, and if necessary have the led driver running off a big storage cap downstream of the in-line fet switch.
However, big caps mean electrolytic caps which means low lifetime.
The above link shows this kind of fet switch solution, but if it is acceptable here, then why do they not do it with rear led lamps for cars I wonder?......I saw a rear car led lamp pcb and it had about 15 SMC , 26V transorbs on the pcb......why on earth they didn't just use the fet switch I'll never know.
Also, they say they have to use the diode bridge for reverse polarity connection, but why didn't they just use another pfet for reverse polarity protection.