Description
The BH7881EFV is a low voltage drive, low noise, high output speaker / headphone amplifier in which a BiCMOS process is used. An on-chip speaker amplifier circuit that is capable of 2W+2W output can be used as a headphone amplifier by switching the operating mode, which makes it possible to configure an audio system using few external devices. Moreover, since a low saturation regulator in which output voltage and output current can be programmed is built in, clear tone quality is obtained even when directly connected to a digital power supply. A peripheral analog circuit also can be regulator driven. Furthermore, the BH7881EFV provides speaker output and VREG output short circuit detection functions, a thermal shutdown function with hysteresis, and a speaker protection function, so it also can be used confidently from a safety standpoint.
·Built-in low saturation type regulator (Digital power supply driver, voltage and current variable, short circuit detection)
·Bass boost mode, gain switching functions
·Speaker MUTE function (Headphone mode)
·Built-in line amplifier output (gain adjustment, LPF setting) active / suspend function (TTL input control pin)
·Hysteretic thermal shutdown function (Set for approximately 150? / 90?)
·IC protection function (SP pin VCC / GND short circuit detection)
·Speaker protection function (Output voltage amplitude control)
