The SA58635 is a stereo, class-G headphone driver with I2C-bus volume control. The I2C-bus control allows maximum flexibility with digital volume control, independent channel enable and mute control. The output of the SA58635 is referenced around true ground zero. It is designed to operate at the low supply current of 1.5 mA making it battery friendly. A unique power management technique provides class-G power efficiency by using a buck converter to step down the battery supply from a typical l
The NXP SA58637 is a two-channel audio amplifier housed in a 20-pin HVQFN package with an exposed die attach paddle. It features a Bridge-Tied Load (BTL) output stage with a complementary PNP-NPN output stage and includes standby/mute logic. The device is designed for applications such as professional and amateur mobile radio and portable consumer products like toys and games. It provides power output of 2.2 W per channel with an 8 Ω load at a 9 V supply.
| Power output | 2.2 W per channel |
|---|---|
| Load impedance | 8 Ω |
| Supply voltage | 2.2 V to 18 V |
| Standby current | < 10 µA |
| Gain range | 6 dB to 30 dB |
| Package | HVQFN20 |
| Thermal resistance (junction-to-ambient) | 22 K/W |
The device provides 2.2 W per channel into an 8 Ω load at a 9 V supply.
The gain can be set within a range of 6 dB to 30 dB using external feedback resistors.