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 SA58635 is a stereo, class-G headphone driver designed for battery-friendly operation with low supply current. It features an integrated buck converter to step down the battery voltage and an internal charge pump to eliminate DC blocking capacitors.
The device offers digital volume control via I2C-bus, allowing independent channel enable and mute functions. It delivers 2 x 25 mW into 16 Ω or 32 Ω loads and includes thermal shutdown and self-limiting current protection.
| Power supply range | 2.3 V to 5.5 V |
|---|---|
| Output power (16 Ω) | 2 x 25 mW minimum |
| Supply current | 1.5 mA typical |
| Shutdown current | 5 uA maximum |
| Signal-to-noise ratio (S/N) | 100 dB minimum |
| Power Supply Rejection Ratio (PSRR) | > 100 dB |
The device operates with a power supply voltage ranging from 2.3 V to 5.5 V.
Yes, it has an integrated charge pump designed to eliminate DC blocking capacitors.
The driver delivers a minimum of 2 x 25 mW into 16 Ω loads.