Recent content by shawnbd

Thank you for the advice, I found a samsung 5V adapter model is EP-TA50UWE and an Apple 10W A1357, using the USB tester test results are as follow.

Dear Amirm, Would you share the photo of detail your Samsung USB charger, so I can find one.

Update from Purifi Kim Eval2 have a transistor-zener preregulator before the LT30xx devices, so don‘t need to add an extra regulator, I can use the SMPS1200A400 with unregulated Vaux :). in my case, I can sell my TPS7A4700 TPS7A43300 on ebay,

1. SMPS1200A400 Output Voltage Vaux are +20.5V -20.5V , I use the TPS7A4700 TPS7A43300 regulated to +15V, -15V, Eval2 asking the 15V input . 2. this idea come from ergo at #87 http://www.htguide.com/forum/showthread.php?44316-Purifi-class-D-amplifiers/page3. 3,4 Thx，Good advice, I didn't...

Hello everyone, Here I share my Purifi Eval2 design plan. Thanks to Kim from Purifi for getting the module Eval2 smoothly. The Design studied the pictures that shared before. The basic design is as follows 1. Use TPS7A4700 3300 to adjust the AUX voltage from SMPS 1200A400 to +-15. 2...