BU7150NUV_15 Datasheet, PDF (10/22 Pages) Rohm – Headphone Amplifier Designed for 0.93V Low Voltage Operation

BU7150NUV
Technical Note
●Functional descriptions
[Timing Chart]
BU7150NUV can control many mode states. “Active” is normal operation state for output signal. “Shutdown” is IC power
down state for low power. “Mute” is Headphone amplifier power down state for low power and fast turn-on, because
keeping BIAS voltage = VDD/2. “Turn on” and “Turn off” are sweep state.
Fig. 37 Timing Chart (MODE = VSS: Single-ended mode)
Fig. 38 Timing Chart (MODE = VDD: BTL- mode)
Also, BU7150NUV has wait time for reduction of pop-sound at turn-on and turn-off. Turn-on wait time is 70msec from IN1
voltage = VDD/2. Turn-off wait time is 140msec from BYPASS voltage = 100mV. Please don't change SDB, MUTEB
condition at 70msec and 140msec wait- time.
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10/18
2015.1 - Rev.E