The two jacks of the car charger, one is the output current is 1A, one is the output current is 2A, 2A is mainly used for PAD, specifically the difference is, can be mixed, is the problem of charging speed, with 2A charging mobile phone, very fast, but the mobile phone battery will be very hot, with 1A charging PAD, will be very slow.
Car charger refers to the car charger that is routinely powered by car battery (car 12V, truck 24V), which is widely used in the field of lithium battery charging of various portable and handheld devices.
Such as: mobile phone, PDA, GPS, etc.; The car charger should consider the actual needs of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of the car battery (transient peak voltage, system switching noise interference, EMI, etc.); Therefore, the power management IC selected by the car charging scheme must meet the following requirements: high voltage resistance, high efficiency, high reliability, low frequency (conducive to EMI design) switching power chip.
Car charger It has two jacks, the two charging are the same, there is no comparison.