818
Audio ICs
Low power consumption headphone
driver for digital audio
BA3577FS
The BA3577FS is a headphone driver developed for portable digital audio equipment that supports a voltage of 1.5V.
Applications
Portable MD players and others
Features
1) 1.5V supported.
2) Low current consumption
(At PO = 0.5mW / ch, VCC inflow current = 3.3mA, and
B inflow current = 6.8mA (Typ.)).
3) Output coupling capacitor of 100µF produces fC =
45Hz (RL = 16Ω).
4) Internal muting switch.
5) Internal ripple filter.
6) Internal BEEP circuit.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
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Audio ICs BA3577FS
Block diagram
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Audio ICs BA3577FS
Pin descriptions
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Audio ICs BA3577FS
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Audio ICs BA3577FS
Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 2.8V, B = 1.2V, PWSTB = 2.8V, MUTE = 0V,
RL = 16Ω, f = 1kHz, DIN AUDIO)
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Audio ICs BA3577FS
Measurement circuit
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Audio ICs BA3577FS
Measurement conditions
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Audio ICs BA3577FS
Circuit operation
(1) The BA3577FS operates at the timing chart shown below, which prevents popping noises in the headphone output.
(2) The ripple filters (pins 1 and 2) and bias amplifiers (pins 3 and 4) of the BA3577FS cannot be used as external power
supplies or reference voltages.
(3) The BA3577FS outputs a BEEP signal only when the PWSTB pin (pin 7) and the MUTE pin (pin 9) are HIGH. Also,
input a rectangular waveform of 500Hz to 5kHz with an amplitude from the GND to VCC to the BEEP IN pin (pin 11).
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Audio ICs BA3577FS
Application example
Electrical characteristic curves
External dimensions (Units: mm)
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Audio ICs BA3577FS
Product Designation Page 1 of 2
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Product Designation
lWhen ordering, specify the part number.
lCheck each code against the tables shown below.
lFill in from the left, leaving any extra boxes empty on the
right.
Product Designation
Ordering information
Packing and forming information only required for SOP, and QFP
parts that are required in tape and reel containers. For example,
to order part BA4558F on paper tape type E2, order number is
BA4558F-E2, when required in tube container, order number is
BA4558F.
Quick reference of packaging specifications
Package Container
type Packaging
specification code
DIP/SDIP Tube
container
SIP/HSIP/ZIP/SZIP/RSIP-A3 Tube
container
SOP/SSOP/HSOP/WSOP-10/WSOP-
L10
Tube
container
Embossed
tape E1, E2
Product Designation Page 2 of 2
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[LSI Package Assemblies]
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SSOP-A54 Embossed
tape E2
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pack) VP
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tape E1, E2
TO220FP Bulk
Tube
container
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tape TL, TR
TO252 Embossed
tape E1, E2
RSLP8 Embossed
tape E2(Sprocket 1pin,
Horizontal)
RSIP13 Embossed
tape
E2(Sprocket 1pin,
Horizontal), E4
(Sprocket 1pin,
Vertical)
Note: SOP type can be delivered in tube, paper tape, or embossed tape.
BGA/CSP package |SIP/ZIP package
QFP package |Photo package
SOP package |Product Designation
DIP package |Packaging Specification
