Цитата(ViKo @ Apr 20 2016, 13:13) 
А что насчет замыканий A и B на землю и питание?
Вот ответ про замыкание драйвера на 5В или землю:
Цитата
For maxim device, there is portection internally, the peak current is limited to not larger than 250mA for short circuit condition.
The short circuilt current is not constant, it's foldback current limit. at short circuit conditon, the high current will warm device up, if the die temperature rises excessivelly, it will turn off driver to high impedance conditon and recovery when the temperature drops. so, there are multi-protection on driver. commonly, it will not damage the device at short circuilit conditon. but anyway, we do not recommend to make it work at short conditon for long time, it will speed device age and maybe damaged.
All we talk about short circuilt are at the common voltage range, if the device short the voltage out of common voltage range, it maybe damage the device.
The short circuilt current is not constant, it's foldback current limit. at short circuit conditon, the high current will warm device up, if the die temperature rises excessivelly, it will turn off driver to high impedance conditon and recovery when the temperature drops. so, there are multi-protection on driver. commonly, it will not damage the device at short circuilit conditon. but anyway, we do not recommend to make it work at short conditon for long time, it will speed device age and maybe damaged.
All we talk about short circuilt are at the common voltage range, if the device short the voltage out of common voltage range, it maybe damage the device.