LM4925
Overview
The unity gain stable LM4925 is both a mono differential output (for BTL operation) audio amplifier and a Single Ended (SE) stereo headphone amplifier. Operating on a single 3V supply, the mono-BTL mode delivers 410mW into an 8Ω load at 1% THD+N.
- Mono-BTL Output Power (RL = 8Ω, VDD = 3.0V, THD+N = 1%) 410mW (typ) Single Ended Output Power Per Channel (RL = 16Ω, VDD = 3.0V, THD+N = 1%) 40mW (typ) Micropower shutdown current 0.1µA (typ) Supply voltage operating range 1.5V < VDD < 3.6V PSRR 100Hz, VDD = 3V, BTL 70dB (typ) Features
- BTL mode for mono speaker
- 2-cell 1.5V to 3.6V battery operation
- Single ended headphone operation with output coupling capacitors
- Unity-gain stable n “Click and pop” suppression circuitry for both Shutdown and Mute
- Active low micro-power shutdown
- Active-low mute mode
- Thermal shutdown protection circuitry
