OPA1688 Super CMOY, 2x 9V with real ground and headphone relay - PCBs

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#444
WoodyLuvr said:
Would someone kindly double check my math...

agdr Audio OPA1688 Parallel Super CMoy Specs
Output Current (peak): 150 mA per channel
Output Current (rms): 106.05 mA per channel
Output Impedance: ~0 ohms
Voltage Gain: 1x ("unity-gain amplifier")
Voltage Cut-Off Level: 8.4 Vnominal
Voltage Swing (peak): 7.4 Vdc
Voltage Swing (rms): 5.23 Vrms​

Please Note: I am not using batteries but rather a RECOM RW-0509D DC-DC Converter which converts the 5V from a USB 2.0 DIY power-only cable to the required 9V. At max it is using under 1W (<180mA @ <5V).
Click to expand...

WoodyLuvr said:
*** BUMP *** Any electronic geniuses around to double check my math and nomenclature:

agdr Audio OPA1688 Parallel Super CMoy Specs
Output Current (peak): 150 mA per channel
Output Current (rms): 106.05 mA per channel
Output Impedance: ~0 ohms
Voltage Gain: 1x ("unity-gain amplifier")
Voltage Cut-Off Level: 8.4 Vnominal
Voltage Swing (peak): 7.4 Vp (aka Vdc)
Voltage Swing (rms): 5.23 Vrms​

Please Note: I am not using two 9V batteries but rather a RECOM RW-0509D DC-DC Converter which converts the 5V from a USB 2.0 DIY power-only cable to the required 9V. At max I believe this converter is using under 1W (<167mA @ <5V).


__________________
Click to expand...

Here are some Maximum Power (rms) numbers while under load:

Voltage Swing (rms): 5.23 V​
Output Current (rms): 106.05 mA per channel​

Maximum Power (rms): 181 mW @ 16Ω (1.7 V)​
Maximum Power (rms): 360 mW @ 32Ω (3.4 V)​
Maximum Power (rms): 427 mW @ 64Ω (5.23 V)​
Maximum Power (rms): 228 mW @ 120Ω (5.23 V)​
Maximum Power (rms): 182 mW @ 150Ω (5.23 V)​
Maximum Power (rms): 91 mW @ 300Ω (5.23 V)​
Maximum Power (rms): 46 mW @ 600Ω (5.23 V)​
 
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