LA4906 Datasheet, PDF (1/10 Pages) Sanyo Semicon Device – 17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for Car Audio Systems

Ordering number : EN *5714
Preliminary
Monolithic Linear IC
LA4906
17-W, 2-Channel BTL AF High-Efficiency
Power Amplifier for Car Audio Systems
Overview
The LA4906 is a BTL two-channel power amplifier for
use in car audio systems. It uses a signal-following
switching technique in the power supply for the amplifier
output stage and a newly-developed nonlinear amplifier
that features nonlinear characteristics in the signal system.
These features hold increases in the number of external
components to a minimum, and reduce power dissipation
(and thus heat generation) in the practical operating region
to about 1/2 that of earlier class B amplifier ICs. This can
contribute significantly to miniaturization and weight
reduction in the heat sink and to reduction of the heat
generated within the end product case.
Features
• Power dissipation reduced by 50% (for music at average
power levels, as compared to earlier Sanyo products)
• The number of required signal-following switching
circuits has been reduced to just one circuit for two
channels, reducing the number of external components.
• The output is a pure analog signal; no switching noise
whatsoever appears on the output lines.
• Uses a single-voltage power supply from 8 to 18 V.
• Provides a full range of built-in protection circuits,
including shorting of output pin to V_CC, shorting of
output pin to ground, overvoltage, and thermal
shutdown protection.
• Built-in standby switch
• Clipping detection function
Package Dimensions
unit: mm
3160-SIP23HZ
[LA4906]
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V_CC max1
V_CC max2
I_O Peak
Pd max
Topr
Tstg
Conditions
With no signal, t = 1 minute
Per channel
With an arbitrarily large heat sink
Notes: 1. Set V_CC and R_L to be in the range where Pd max does not exceed 37.5 W.
2. The overvoltage protection circuit operates at V_CC = 26 V or higher.
SANYO: SIP23HZ
Ratings
Unit
18
V
16
V
4.5
A
37.5
W
–35 to +85
°C
–40 to +150
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73097HA(OT) No. 5714-1/10