Analysis of Motorola 168VA Mobile Car Charger

Related Component PDF Download:

UTC34063 in the figure is an Octopod double-line in-line IC. It is a DC conversion control IC with single step up and down voltage. The IC has temperature compensator, comparator, high current output switch and other units inside. The oscillation frequency is 100KHz. The measured data are shown in the table below.

Foot size... In Road Resistance Value... Voltage (V)

...red (K_) black (K_)
1... 4.1... 8.2.... 12
2... 0.8... 7.8... 8.28
3... 5.8... 22... 0.65
4....... 0..... 0......... 0
5....... 1........ 1.... 1.26
6... 4.2... 8.2.... 12
7... 4.2... 8.2.... 12
8....... 5........ 10... 10.6

Note: (1) Measure the road resistance with 5-meter;

(2) Voltage value is 12V of input DC, no load state is measured by DT890C+ digital table