We are using the TPS2544EVM-064 to test charging on several phones (about 7 or so). It looked good until we plugged in a Motorola Droid RAZR-M & RAZR-MAX. For both of those phones, there was no current draw. Any idea what may be going on?
We can interchange phones at will. Whenever the 2 Motorola RAZRs are attached, they draw no current whatsoever. Old phones draw about 50mA, and the newest Samsung phone draws about 700 mA. An HTC phone (about 2 years old) draws 400 mA. We can cycle repeatedly, always get the same results.