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PDF LA4587 Data sheet ( Hoja de datos )
| Número de pieza | LA4587 | |
| Descripción | Preamplifier + Power Amplifier for 1.5 V Headphone Stereos | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LA4587 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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Ordering number: EN5204A
Monolithic Linear IC
LA4587M
Preamplifier + Power Amplifier
for 1.5 V Headphone Stereos
Overview
The LA4587M is a system IC that includes all of the necessary
functions for a playback set on a single chip, reducing the
number of external components needed.
Functions
. Stereo preamplifier (supports auto reverse function,
switchable between metal and normal tape)
. Stereo power amplifier (OCL, mute function)
. Ripple filter
. Low boost function (BTL operation in low-frequency range)
. AMSS (Automatic Music Select System)
. Power switch
Package Dimensions
unit : mm
3102-QFP48D
[LA4587M]
Features
. Preamplifier has a high open-loop gain (VGO = 73 dB).
. Preamplifier requires no NF capacitor.
. Virtual ground capacitor can be 1 µF or less. (Lower
impedance is achieved by having a VREF amplifier built in.)
. Ripple filter requires no capacitor for preventing oscillation.
. Powerful output is obtained in low boost output
. (Po = 21 mW/VCC = 1.2 V, f = 100 Hz).
A high-frequency cutoff capacitor is built into the
preamplifier and power amplifier inputs; anti-buzz provision.
SANYO : QIP48D
Specifications
Maximum Ratings at Ta = 25 °C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
VCC max
Pd max
Operating temperature
Topr
Storage temperature
Tstg
Conditions
Ambient temperature, Ta − °C
Ratings
3.0
635
–10 to +60
–40 to +125
Unit
V
mW
°C
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13097HA(II)/N3095HA(II) No.5204-1/18
1 page  
Pin Functions
Pin No.
Pin name
45 R.F OUT
LA4587M
Pin voltage
[V]
1.13
Unit (resistance:Ω, capacitance: F)
Internal equivalent circuit
* Pin voltage is when VCC = 1.2 V
Remarks
2 POWER OUT1
7 POWER OUTC
13 POWER OUT2
3 POWER NF REF1
9 POWER NF REFC
12 POWER NF REF2
0.6
0.75
4 POWER NF1
8 POWER NFC
11 POWER NF2
0.75
5 POWER H.P1
10 POWER H.P2
0.75
14 L.P2
0.75
c A 160 Ω resistor is connected
between individual outputs
(between pins 2 and 7, and
between pins 13 and 7).
c Each power NF connection
c Each power NF connection.
c Grounded to VREF through a
1 kΩ resistor when low boost
is on (pin 41: floating).
c Low boost secondary LP
connection.
Continued on next page.
No.5204-5/18
5 Page 
LA4587M
Sample Application Circuits for Low Boost Switching
Sample 1
Sample 2
In the above circuits, MID and MAX are switched by changing the gain of the boost amplifier.
The AMSS comparator
Block Diagram
No.5204-11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet LA4587.PDF ] | |
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