For Portable Speaker Amplifiers,Are there any plastic package type products with variable gain?|FAQ|ROHM Semiconductor

FAQ's

For Portable Speaker Amplifiers,
Are there any plastic package type products with variable gain?
- The BD5632NUX, BD5634NUX, and BD5638NUX are fixed gain types, but the gain can be reduced with an external resistor.
  
  The gain setting is calculated by the following formula.
  
  Gain = 20×log｜Rf / (Rs+Ri)｜+6dB(BTL)
  
  The internal resistors Ri are 100kΩ (BD5632NUX), 50kΩ (BD5634NUX), and 25kΩ (BD5638NUX), and the feedback resistor Rf is 100kΩ for each.
  
  For the BD5638NUX, when external resistor Rs = 0Ω, Gain = 18dB.