an5270 Panasonic Corporation of North America, an5270 Datasheet

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an5270

Manufacturer Part Number
an5270
Description
4.3 W X 1 8ohm Power Amplifier With Volume Control And Tone Control
Manufacturer
Panasonic Corporation of North America
Datasheet

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ICs for Audio Common Use
AN5270
4.3 W
The AN5720 is an integrated circuit designed for 4.3 W(8
Note) Pins 2 and 4 are weaker in protection against positive surge than the other pins.
) power amplifier with volume control and tone control.
DC volume control : 0 to 5 V
DC tone control : 0 to 5 V
9-lead single-in-line plastic package with fin
Pin No.
Overview
Features
Block Diagram
Pin Descriptions
1
2
3
4
5
6
7
8
9
It is necessary to pay attention during application use.
1(8 ) Power Amplifier with Volume Control and Tone Control
V
Sound input
Low frequency input
Volume control
Tone control
Ripple filter
Ground
Sound output
V
CC1
CC2
amp.
Pre
Pin Name
Volume
control
control
Tone
8.4 0.25
5.8 0.25
1.5 0.25
5.6 0.25
HSIP009-P-0000
6.3
0.3
9
8
7
6
5
4
3
2
1
7.1
0.25
3.75 0.25
Unit : mm
1

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an5270 Summary of contents

Page 1

... ICs for Audio Common Use AN5270 4.3 W 1(8 ) Power Amplifier with Volume Control and Tone Control Overview The AN5720 is an integrated circuit designed for 4.3 W(8 ) power amplifier with volume control and tone control. Features DC volume control : tone control : 9-lead single-in-line plastic package with fin ...

Page 2

... AN5270 Absolute Maximum Ratings Parameter Supply voltage Circuit voltage Supply current * 3, 4 Circuit current * 2 Power dissipation * 1 Operating ambient temperature * 1 Storage temperature Note) Do not apply a current or voltage from the external to the terminals that are not described above excluding parameters regarding ambient temperature and storage temperature. ...

Page 3

... V TC O(tone max.) O(tone min.) AN5270 5.1k 3.3 F 0.039 30k 5V 10k VR 33k 10k should start up first before the onset of V CC1 declines faster than V CC2 CC1 AN5270 Vol. max., a Min Typ Max Unit 7.2 8.3 9 ...

Page 4

... Al board (t 1 mm) 4 Infinity heat sink Structure of pre-amp. stage Tone-control Fig. Simplified structure of AN5270 pre-amp. stage Explanation of gain notations : G : Gain of tone-amp. (treble-amp Gain of flat-response amp Gain of bass-amp Gain at point 1 with respect ...

Page 5

... C1 · 6600) 1 tan (2 f · C1 · 6600 100 kHz 2 Fig. Frequency response of AN5270 Note This is the response if LF pin is open (i.e. R1 open). passes only the upper range of frequencies (cut-off T max., tone max.) : · pre · G · ...

Page 6

... Note Tone max. Table. Tabulated summary of frequency characteristics of AN5270. Volume control The volume control range This range is adopted simplify the pull-up of typical PWM output from micro-computer IC. The following simplified PWM output configuration is suggested : The high input impedance of the volume control pin makes the input current extremely small, so that it is not necessary to have an external buffer at the PWM output ...

Page 7

... CC V should be fixed Achieve best performance by obtaining this supply from voltage regulator output. CC1 Configuration Configuration Fig. Volume characteristics of AN5270 47 k and a Miller capacitor which is formed and the gain AN5270 2 ...

Page 8

... Output Pin8 470 ms Fig. Power on/off typical timing characteristics of AN5270 (The above timing diagram is based on the evaluation circuit that is given in the product specification. Actual chasis performance may differ due to differences in power supply and external components.) The internal mute pulse will force the volume to minimum by grounding Pin4 momentarily. In most chasis also common to implement externally the audio defeat feature by forcing Pin4 to ground momentarily, for the purpose of power-on/off as well as during channel switching ...

Page 9

... Pin6 and Pin9 (e. use non-polarity type if possible Fig. One suggested counter-measure against power-off 'pop' for AN5270. This effect of Cpop is to discharge C6 gradually as soon as power is switched off. However, it must be noted that the necessity of this countermeasure is dependent upon the set design and other timing considerations ...

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