#fine_arts & #electronics
In preparation of the "final" version of the TPA32XX amplifier ((TPA3245, TPA3251, TPA3255) there's a dedicated AFE module 2-stage design with mail filter-feedback (PFFB).) The implementation of PFFB relating to this module also works for other class D ICs, such as, for example, TPA3116, TPA3118...
Experience has shown that most / all bluetooth modules available on the market have problems of various kinds. Is it generating noise, receiving noise, have a poor coverage and/or bad audio quality.
150W constant current sink (60V 10A) - battery capacity Tester
Battery charger on the basis of the BQ24450 (UC3906) with isolated input to load several AGM/GEL cells in series.
On the basis of experience and measurements with TPA3251 boards from TPA3251D2 - 2 x 175W stereo 350W Mono class-D amplifier rises the "TPA3245/51/55 - universal" Board for up to 600W (PBTL Mono).
Comparing the THD data (according to data sheet) of TPA3251 and TPA3255 shows that the TPA3255 into 8 Ohms provides same/better values than the TPA3251 into 4 Ohms. It compares with a 4 ohm load, slightly higher values arise...
Based on the "shrink"mod Board this TPA3251 amplifier variant in an aluminium casing, which also serves the heat dissipation was created.
Many inexpensive electronic circuits from the far East (mainly China) containing capacitors with unknown or little or no appropriate operating parameters, dubious origin or partly subject to fake / fakes / imitations of well-known brands. Here is a list.
As an extension of the "Akita" family Texas instruments has, due to the TPA3251D2 a "big brother" available - the TPA3255 (HTSSOP44). By adjusting the input voltage range on maximum 53.5V for example, a direct is operating at 10 s Pedelec battery possible. PIN compatibility allows a direct...
If you have no CSR USB SPI programmer, but a 'real' LPT port (printer port), the CSR can also be programmed via LPT-SPI.
