Class D BandWith DC to 10KHz

mederic · 24th November 2010, 03:13 PM

hello
I try to realize an amplifier with a bandwidth of 0Hz(DC) to 10Khz

I am using the IRAUDAMP7D (irs2092)

I simply remove DCP (dcprotect) and DC Block input capacitor

my amp goes into over current protec below 4Hz

Is anyone could help me to understand is mystery?

(I work in research and the amp is designed to control coils)

darkfenriz · 24th November 2010, 03:34 PM

Rail pumping:
The amplifier starts to act as a boost converter pumping the energy from one rail into another so that the differential voltage at rails increases up to mosfet's avalanche.

ssanmor · 24th November 2010, 06:52 PM

The best solution for playing very low frequencies and high power is to use two amplifiers in bridge mode (fed by the same PSU), this way bus pumping from one channel automatically compensates the opposite pumping from the other.
Otherwise with half-bridge designs you will have to use extremely large supply capacitors and you may gain little improvement.

mederic · 25th November 2010, 07:35 AM

thank you for your reply
it looks working well in bridge mode

24th November 2010, 03:13 PM	#1
mederic diyAudio Member Join Date: Sep 2010	Class D BandWith DC to 10KHz hello I try to realize an amplifier with a bandwidth of 0Hz(DC) to 10Khz I am using the IRAUDAMP7D (irs2092) I simply remove DCP (dcprotect) and DC Block input capacitor my amp goes into over current protec below 4Hz Is anyone could help me to understand is mystery? (I work in research and the amp is designed to control coils)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
LT AN67 Ultralow THD 10kHz sine oscillator group buy.	Frex	Group Buys	58	4th November 2011 01:09 PM
AN67 Ultra-low THD 10kHz sine oscillator PCB	ikoflexer	Swap Meet	6	25th September 2010 05:43 AM
Bass Bandwith for PA Sub?	Xoc1	Subwoofers	9	15th February 2010 04:14 PM
Limiting the bandwith of a current mirror	ionomolo	Solid State	7	11th April 2009 02:49 AM
DC-DC Power converter for Class T amp power supply?	rtalk	Class D	2	7th December 2004 04:02 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

24th November 2010, 03:34 PM	#2
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	Rail pumping: The amplifier starts to act as a boost converter pumping the energy from one rail into another so that the differential voltage at rails increases up to mosfet's avalanche.

24th November 2010, 06:52 PM	#3
ssanmor diyAudio Member Join Date: Jan 2002 Location: Madrid	The best solution for playing very low frequencies and high power is to use two amplifiers in bridge mode (fed by the same PSU), this way bus pumping from one channel automatically compensates the opposite pumping from the other. Otherwise with half-bridge designs you will have to use extremely large supply capacitors and you may gain little improvement.

25th November 2010, 07:35 AM	#4
mederic diyAudio Member Join Date: Sep 2010	thank you for your reply it looks working well in bridge mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)