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TPA3250: Operation in negative temperatures

Part Number: TPA3250
Other Parts Discussed in Thread: TPA3251, , TPA3255-Q1

Dear Team,

My customer has the following requirements for a speaker amp: 

4 channels (can optionally use 2x2channel parts)

Vsupply:  16.8 - 33-6V (safe up to 38-40V)

Power: 4x20W@24Vnom, independent regulation, SE, BTL or PBTL

Temperature range: -40C do 85C

The TPA3250/TPA3251 seem to be appropriate except for the temperature range requirements. Do you have any recommendations regarding cold start? How do these parts behave at below 0C? 

Many thanks,


  • Hi Daniel,

    The recommended operating conditions is 0~125C for TPA3250, so the performance in any operating condition out of this range is not guaranteed. 

    I would recommend TPA3255-Q1 for this application, which is an automotive grade device and supports -40~125C temperature range.