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TPA3244EVM: Voltage Gain

Part Number: TPA3244EVM
Other Parts Discussed in Thread: TPA3244, TPA3245

Hi,

A customer had measured the gain of TPA3244EVM in SE inputed BTL mode. His measurement gain was 18dB, but it did not correspond with the gain of the datasheet. The specification of Inverting Voltage Gain is typical 20dB in TPA3244 datasheet. His measurement conditions are as follows;

Input level: 200mVrms
Output level: 3.2Vrms

J4 & J19: 1-2(SE)
J21: OUT(BTL)
J26: 2-3(INC)
J27: 2-3(IND)

<PBTL SELECT>
J7 & J8: OUT

<MODE PIN SELECTION>
J5: 2-3(M1=0)
J6: 2-3(M2=0)

<FREQUENCY ADJUST>
J16: 3-4(MASTER MODE)

Best regards,

Akio Ito