Sanyo EP93F manual LA4705NA, LA4708NF8

Monolithic Linear IC

Car Stereo 17 W Two-Channel BTL AF Amplifier

LA4705NA

Overview

The LA4705NA is a two-channel BTL power amplifier IC designed for car stereo systems. It was designed with particular emphasis placed on achieving superb audio quality.

The low band frequency characteristics were extended with a new capacitor-free noise filter circuit, and improvements in both circuit and pattern designs allow crosstalk, a source of audio quality problems, to be reduced, resulting in audio with powerful bass and clear treble.

The LA4705NA also features a full complement of protection circuits and a standby mode switch.

Functions

■Total output: 25 W + 25 W (VCC = 14.4 V, THD = 30%, RL = 4Ω )

■Supports loads as low as RL = 2 Ω

■Superb sound quality design (fL < 10 Hz, fH = 130 kHz)

■Noise filter circuit does not require capacitors

■The turn-on time can be set arbitrarily with an external capacitor

■Extremely low levels of impulse noise

■Built-in standby mode switching circuit (microcontroller support)

■Built-in each protection circuit

◆Output pin-to-Vcc short

◆Output pin-to-GND short

◆Load short

◆Overvoltage

◆Thermal shutdown

■Package: SIP18H

Monolithic Linear ICIC

Car Stereo 20 WW TwoTwo--ChannelChannelBTLBTL AFAF AmplifierAmplifier

LA4708NF8

Overview

The LA4708NF is two-channel BTL power amplifier IC designed for car stereo systems. It was designed with particular emphasis placed on achieving superb audio quality.

The low band frequency characteristics were extended with a new capacitor-free noise filter circuit, and improvements in both circuit and pattern designs allow crosstalk, a source of audio quality problems, to be reduced, resulting in audio with powerful bass and clear treble.

The LA4708NF also features a full complement of protection circuits and a standby mode switch.

Note that the LA4708NF is pin compatible with the LA4705NA (car stereo 17 W two-channel power amplifier IC), and allows end product power to be increased simply by switching ICs.

(Pins 1 and 9 must be left open to allow the same circuit board to be used.)

Functions

■High power with a total output of 30 W + 30 W (VCC = 13.2 V, THD = 30%, RL = 4 Ω )

■Supports loads as low as RL = 2 Ω (VCC = 13.2 V, THD = 30%, PO = 30 W)

■Superb sound quality design (fL < 10 Hz, fH = 130 kHz)

■Noise filter circuit does not require capacitors

■The turn-on time can be set arbitrarily with an external capacitor

■Extremely low levels of impulse noise

■Built-in standby mode switching circuit (microcontroller support)

■Built-in each protection circuit

◆Output pin-to-Vcc short

◆Output pin-to-GND short

◆Load short

◆Overvoltage

◆Thermal shutdown

■Package: SIP18H