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Inrush current limiter

johnson

Active Member
Hi,
I've been reading up on amplifier design recently (sad I know) and was wondering if any of the TMA amps had some type of soft start or in-rush current limiting?
Anyone know?
Regards
 

laalves

Active Member

Stevesky

Active Member
Hi Simon,

The multichannel amps have sequenced startup to minimise the startup power surge, this is why the amps do a clickity-clickity-click on startup.

On the earlier design of the controller board it had the concept of a dirty relay that initially took the startup power and then a clean relay was turned on, followed by the dirty relay turning off. For the startup surge a single module creates this was somewhat OTT and was dropped in later units. Normally if this technique is used a low resistance resistor is in circuit with the dirty relay to minimise the startup surge and then the clean relay without the resistor is turned on a short period afterwards.
 

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