|Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|8th April 2008, 05:07 AM||#1|
Join Date: Jan 2007
Blog Entries: 3
“Ideal” power/regulation for higher-current digital-section ICs
For various power applications, some like shunts, others like series.
What might the ideal PS and regulator topologies be for power- (current-) hungry ICs like…
Philips SAA7210 (demod/decoder):
Vdd = 5V
Idd = 200mA
Philips SAA7220 (oversampler, aka digital filter):
Vdd (pin 24) = 5V
Idd (pin 24) = 180mA
Pacific Microsonics PMD-100 (oversampler, aka digital filter):
Vdd = 5V
Idd = 110mA (max)
Pdd = 550 mW (max)
Philips TDA1541A (DAC chip):
Vdd = 5V
Idd = 45mA
Vdd1 = -5V
Idd1 = 45mA
Vdd2 = -15V
Idd2 = 25mA
I would like to try CCS+shunt regulators for the above ICs. But the high-noise Zeners, often used in “higher”-current CCS+shunt regs I've seen, have me a bit concerned. For digital-section ICs, some folks use TL431s (instead of Zeners) in their CCS+shunt regs. However, these folks are powering chips that comparatively eat very little current/power (e.g. TDA1545 Idd=3.0mA, etc.).
All this noted, would a “super regulator”, like Jung or ALW, be a better choice for the above ICs?
If, in your opinion, each IC (or, even, indiv. supply inputs of a single IC, such as TDA1541) is best optimized by a specific PS/reg topology, then please state that and which one.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Current regulation for filament of say a 300B||Bas Horneman||Tubes / Valves||10||3rd September 2008 11:32 PM|
|V regulation for digital circuits||DECKY999||Digital Source||9||28th March 2008 05:16 PM|
|Do I really need voltage regulation on such a small current?||Sunsun22||Power Supplies||9||13th October 2006 09:23 PM|
|LT1085 Current Regulation for DHT filaments||snoopyma||Tubes / Valves||1||25th June 2006 01:17 AM|
|Super-power amps - higher current better than higher voltage||Circlotron||Solid State||34||28th June 2002 05:01 AM|
|New To Site?||Need Help?|