The two amplifiers are practically the same, except for the gain. They have the following advantages
- Voltage gain with feedback typically set at 20 dB for the TDA1517 and 40 dB for the TDA1519 (14.4 V supply and 4 ohms load).
- Excellent balance between channels (around 1 dB)
- Excellent ripple rejection (48 dB between 100 Hz and 10 kHz for Rs = 0 ohm)
- Protection with bypass load
- Output protected against AC and DC short circuits in relation to earth or supply
- Safe against polarity inversions
- Protected against electrostatic discharge
- Requires few external components
- It has the feature of stand-by with switching voltage from 0 to 2 V on pin 8, and a switching current of only 12 uA to allow the use of inexpensive switching systems. The current drained in the stand-by condition is less than 100 uA. The voltage on pin 8 for normal operation is greater than 8.1 V.
- Mute feature, with a switching voltage of 3 V to 6.4 V on pin 8 to eliminate clicks when switching on and off. The current drained from the source in the mute condition is 40 mA.
