I²C-Bus Controlled 4 x 45 W Power Amplifier

Key Features

• Stop/start-car prepared: keeps operating without audible disturbance during engine start at a battery voltage as low as 6 V
• Operates in either legacy (non I²C-bus) or I²C-bus modes (3.3 V and 5 V compliant)
• Four hardware-programmable I²C-bus addresses
• Can drive 2 Ω and 4 Ω loads
• Speaker fault detection
• Start-up diagnostics with load detection: open, short, present; filtered for door-slam and chatter relays
• AC load (tweeter) detection with low and high current mode
• Gain select after start-up without audible disturbance
• Independent selectable soft mute of front and rear channels
• Programmable gain (26 dB and 16 dB), independently programmable for the front and rear channels
• Line driver mode supports engine start at a battery voltage as low as 6 V (16 dB and mid-tap voltage 0.25 x V_P)
• Programmable clip detect: 2 %, 5 % or 10 %
• Programmable thermal pre-warning
• Pin STB can be programmed/multiplexed with second-clip detect
• Clip information of each channel can be directed separately to pin DIAG or pin STB
• Independent enabling of thermal- , clip- or load fault information (short across the load or to V_P or to ground) on pin DIAG
• Loss-of-ground and open V_P safe (minimum series resistance required)
• All amplifier outputs short-circuit proof to ground, supply voltage and across the load (channel independent)
• All pins short-circuit proof to ground
• Temperature controlled gain reduction to prevent audio holes at high junction temperatures
• Programmable low battery voltage detection to enable 7.5 V or 6 V minimum battery voltage operation
• Over-voltage protection (load-dump safe up to V_P = 50 V) with over-voltage pre-warning at 16 V
• Offset detection