EUA5544 Datasheet, PDF (1/10 Pages) Eutech Microelectronics Inc – Class AB Stereo Headphone Driver with Shutdown

EUA5544
Class AB Stereo Headphone Driver
with Shutdown
DESCRIPTION
The EUA5544 is pin compatible with the BH3541/4, and
functionally compatible with the TPA611 series and
LM488 series. As the EUA5544 contains advanced
depop circuitry which eliminates pops & clicks during
shutdown-on and shutdown-off, it can reduces a capacitor
and resistor compared to Mute solution of other devices.
The EUA5544 features an advantage of low-power
consumption shutdown mode, activated by driving the
shutdown pin with logic low. And it also allows fast
turn-on with 1µF bypass capacitor (C_B).
The EUA5544 is an integrated class AB stereo headphone
amplifier capable of delivering 68mW per channel of
continuous average power into a 16Ω load or 35mW per
channel into a 32Ω load from a 5V power supply. It also
can operate from a 3V supply, capable of delivering 24
mW into a 32Ω load.
The EUA5544 further integrates a voltage divider inside
the chip. Thus, the external resistors can be eliminated.
The EUA5544 has a fixed gain of 6dB so that external
gain setting is unnecessary.
FEATURES
z No Switch On/Off Clicks
z Wide Power Supply Operation 2.5V– 6V
z Mute Function Compatibility
z High Signal-to-Noise Ratio
z Low Distortion
z Large Output Voltage Swing
z Excellent Power Supply Ripple Rejection
z High Crosstalk Immunity 85dB
z Low Quiescent Current
z Ultra-low Shutdown Current …0.02µA typical
z Short-circuit Protection
z Integrated Voltage Divider (V_DD/2) to Eliminate
External Resistors
z Available in SOP-8
APPLICATIONS
z Headphone Amplifier for CD-ROMs
z Portable Audio Equipment
Typical Application Circuit
DS5544 Ver 2.2 Oct.2004
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