LA4802 SANYO [Sanyo Semicon Device], LA4802 Datasheet

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LA4802

Manufacturer Part Number
LA4802
Description
Headphone Stereo Power Amplifier
Manufacturer
SANYO [Sanyo Semicon Device]
Datasheet
Ordering number : ENN6657
Overview
The LA4802T is a headphone stereo power amplifier for
portable CD and MD players. It features a high signal-to-
noise ratio, a high ripple rejection ratio, low distortion,
and low current drain.
Functions
• Headphone stereo power amplifier
• Power switch
• Muting switch
• Beep tone function control input pin (The beep tone
Features
• High signal-to-noise ratio (100 dB typical at 7.5 µV)
• High ripple rejection ratio (70 dB typical)
• Low current drain (950 µA typical)
• On-chip bass compensation circuit
• Ultraminiature package (MSOP-20)
Specifications
Maximum Ratings at Ta = 25°C
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
function can be used regardless of whether the mute
function is on or off.)
(Compensates for bass frequency attenuation due to the
output capacitors and achieves flat frequency
characteristics.)
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Parameter
SANYO Electric Co.,Ltd. Semiconductor Company
V
Symbol
Pd max
CC
Topr
Tstg
max
When mounted, Ta = 80°C
Headphone Stereo Power Amplifier
Package Dimensions
unit: mm
3262-MSOP20
Conditions
(0.35)
0.5
1
20
5.2
[LA4802T]
0.2
10
11
72502RM (OT) No. 6657-1/10
Monolithic Linear IC
–40 to +150
–20 to +80
Ratings
LA4802T
SANYO: MSOP20
375
4.5
0.125
Unit
mW
°C
°C
V

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LA4802 Summary of contents

Page 1

... Ordering number : ENN6657 Overview The LA4802T is a headphone stereo power amplifier for portable CD and MD players. It features a high signal-to- noise ratio, a high ripple rejection ratio, low distortion, and low current drain. Functions • Headphone stereo power amplifier • Power switch • Muting switch • ...

Page 2

... Operating current drain Total harmonic distortion Output noise voltage Crosstalk Ripple rejection ratio Switch Threshold Voltages and Pin Influx Currents • Standby switch (pin 1) • Mute switch (pin 20), boost switch (pin 4) LA4802T Symbol Conditions 2 kHz, R ...

Page 3

... This function can be turned on or off from pin 4. When used as a line output, the load will be less than 16 Ω, and the bass frequency characteristics will be somewhat increased. Therefore we recommend leaving the bass compensation circuit off in this case. + Output pin Load terminal A13554 LA4802T = 2.4 Vp-p. When the muting function is off, the IN Off time ...

Page 4

... Pre GND 0 4 Package : MSOP-20 LA4802T 10k A Pre GND Boost SW Boost 10k B MUTE C Vref OUT A Vref A Vref OUT B Vref B Beep IN Beep R.F OUT R OFF ...

Page 5

... Output capacitors. Low band attenuation increases with lower capacitances. • kΩ) Smoothing resistor for the boost switch on/off transition. Note that using a smaller value will increase the idling current when the boost switch is off. • R2, R3 (10 Ω) Output oscillation prevention resistors. LA4802T No. 6657-5/10 ...

Page 6

... Boost Pre GND 1 F Vref OUT A 7 Vref OUT Beep + 9 0.1 F R.F OUT + 10 4 Package : MSOP-20 LA4802T PW SW 10k A Pre GND SW Boost SW 10k B MUTE C Vref A Vref B IN Beep R OFF OUT 220 F 10k 0.1mF 10 ...

Page 7

... BOOST SW 6 MUTE C 1. OUT 1.21 REF 8 LA4802T Pin description • IC on/off switch • 0 off • 1 • Power input • Bass compensation circuit on/off switch • 0.5 V: Boost on • 1.4 to 4.5 V: Boost off • Connection for the mute switch on/off impulse noise reduction capacitor • ...

Page 8

... RF CONT 2.15 V CONT C 12 1.21 REF 1. LA4802T Pin description • Beep input • Ripple filter output • Ripple filter reference • V amplifier reference REF • Connection for the bass compensation circuit switch on/off impulse noise reduction capacitor Equivalent circuit 300 ...

Page 9

... 1. POWER OUT 1. MUTE SW LA4802T Pin description • Bass compensation circuit low-pass filter connection • The amount of bass boost depends on the capacitance used. • Power outputs • Muting on/off switch • 0.5 V: Muting off • 1.4 to 4.5 V: Muting on Equivalent circuit ...

Page 10

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 2002. Specifications and information herein are subject to change without notice. LA4802T PS No. 6657-10/10 ...

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