LV47011P datasheet, PDF - EEWORLD Datasheet

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LV47011P: DescriptionAudio Amp Speaker 4-CH Stereo 29W Class-AB Automotive 25-Pin HZIP; File Size163KB，10 Pages; ManufacturerON Semiconductor; Websitehttp://www.onsemi.cn

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LV47011P Overview

Audio Amp Speaker 4-CH Stereo 29W Class-AB Automotive 25-Pin HZIP

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Ordering number : :ENA1838D

Ordering number ENA1838D

LV47011P

Monolithic Linear IC

4-Channel BTL Power Amplifier

for Car Audio Systems

Overview

http://onsemi.com

The LV47011P is the IC for 4-channel BTL power amplifier that is developed for car audio system.

Pch DMOS in the upper side of the output stage and Nch DMOS in the lower side of the output stage are

complimentary. High power and high quality sound are realized by that.

This IC incorporate various functions (standby switch, muting function, and various protection circuit) necessary for

car audio system. Also, it has a self-diagnosis function.

Functions



High output : PO max = 50W (typical) (VCC = 15.2V, f = 1kHz, RL = 4, Max power)

: PO max = 29W (typical) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4)

: PO max = 22W (typical) (VCC = 14.4V, f = 1kHz, THD = 1%, RL = 4)



Built-in muting function (pin 22)



Built-in Standby switch (pin 4)



Built-in Self-diagnosis function (pin 25) :

Signal output in case of output offset detection, shorting to VCC, shorting to ground, and load shorting.



Electric mirror noise decrease



Built-in various protection circuit (shorting to ground, shorting to VCC, load shorting, over voltage and thermal shut

down)



No external anti-oscillation part necessary.

Note 1 : Please do not mistake connection.

A wrong connection may produce destruction, deterioration and damage for the IC or equipment.

Note 2 : The protective circuit function is provided to temporarily avoid abnormal state such as incorrect output

connection. But, there is no guarantee that the IC is not destroyed by the accident.

The protective function do not operate of the operation guarantee range. If the outputs are connected incorrectly,

IC destruction may occur when used outside of the operation guarantee range.

Note 3 : External parts, such as the anti-oscillation part, may become necessary depending on the set condition. Check

their necessity for each set.

Semiconductor Components Industries, LLC, 2013

May, 2013

42512SY/41812SY/O2611SY 20110930-S00015/60811SY/92910SY No.A1838-1/10

LV47011P

4. Self-diagnostics function (pin 25)

By detecting the unusual state of the IC, the signal is output to the pin 25.

Also, by controlling the standby switch after the signal of the pin 25 is detected by the microcomputer, the burnout of

the speaker can be prevented.

(1) Shorting to VCC/Shorting to ground : The pin 25 becomes the low level.

(2) Load shorting

: The pin 25 is alternated between the low level and the high level

according to the output signal.

(3) Output offset detection

: when the output offset voltage exceeds the detection threshold voltage,

the pin 25 becomes the low level.

* Note: The output offset abnormality is thought of as the leakage current of the input capacitor.

In addition, the pin 25 has become the NPN open collector output (active low).

The pin 25 must be left open when this function is not used.

5. Sound quality (low frequencies)

By varying the value of input capacitor, low-frequency characteristic can be improved.

However, it is concerned the shock noise. Please confirm in each set when the capacitance value varies.

6. Pop noise

For pop noise prevention, it is recommended to use the muting function at the same time.



Please turn on the muting function simultaneously with power supply on when the amplifier is turned on. Next, turn

off the muting function after the output DC potential stabilization.



When the amplifier is turn off, turn off the power supply after turning on the muting function.

7. Oscillation stability

Pay due attention on the following points because parasitic oscillation may occur due to effects of the capacity load,

board layout, etc.

(1) Capacity load

When the capacitor is to be inserted between each output pin and GND so as to prevent electric mirror noise, select

the capacitance of maximum 1500pF. (Conditions : Our recommended board, RL = 4)

(2) Board layout



Provide the VCC capacitor of 0.1F in the position nearest to IC.



PREGND must be independently wired and connected to the GND point that is as stable as possible, such as the

minus pin of the 2200F VCC capacitor.

In case of occurrence of parasitic oscillation, any one of following parts may be added as a countermeasure.

Note that the optimum capacitance must be checked for each set in the mounted state.



Series connection of CR (0.1F and 2.2) between BTL outputs



Series connection of CR(0.1F and 2.2) between each output pin and GND.

No.A1838-5/10

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