Monolithic Linear LA4708 Stereos 2-Channel Power Amplif

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Monolithic Linear LA4708 Stereos 2-Channel Power Amplif

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Ordering number EN5245B
Monolithic Linear
LA4708
Stereos
2-Channel Power Amplifier
LA4708 two-channel power audio developed pursuit excellent sound quality. Low-region frequency characteristics have been improved through capacitorless circuit, crosstalk which causes "muddy" sound been reduced improving both circuit pattern layout. result, LA4708 provides powerful bass clear treble. addition, LA4708 features on-chip protectors standby switch. LA4708 also pin-compatible with LA4705NA (car stereo-use two-channel power IC), substituted LA4705NA higher power. (When board shared, pins must left open.)
Features
High power supports total output (VCC 13.2V, 30%, Supports when 13.2V, 10%) Designed excellent sound quality 10Hz, 130kHz) capacitorless time settable external capacitor Less noise Standby switch circuit chip (microprocessor supported) Various protectors chip (output-to-ground short/output-to-VCC short/load short/overvoltage/thermal shutdown circuit)
SANYO Semiconductor Co.,Ltd. products described contained herein are, with regard "standard application", intended general electronics equipment (home appliances, equipment, communication device, office equipment, industrial equipment etc.). products mentioned herein shall intended "special application" (medical equipment whose purpose sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level reliability directly threaten human lives case failure malfunction product cause harm human bodies, shall they grant guarantee thereof. should intend products applications outside standard applications customer considering such and/or outside scope intended standard applications, please consult with prior intended use. there consultation inquiry before intended use, customer shall solely responsible use. Specifications SANYO Semiconductor Co.,Ltd. products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer' products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer' products equipment.
51408 JK/93096HA(II)/13096HA(II) No.5245-1/9
LA4708
Specifications
Maximum Ratings 25°C
Parameter Maximum supply voltage Symbol Surge supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature surge peak Topr Tstg 0.2s, single giant pulse channel Arbitrarily large heat sink Conditions signal, Ratings 37.5 +150 Unit
VCC, range that does exceed 37.5W
Operating Conditions 25°C
Parameter Recommended supply voltage Operating voltage range Recommended load resistance Recommended load resistance range Symbol Range where exceeded Conditions Ratings 13.2 Unit
Electrical Characteristics 25°C, 13.2V, 1kHz,
Parameter Quiescent current Standby current Voltage gain Total harmonic distortion Output power Symbol ICCO Output offset voltage Output noise voltage Ripple rejection ratio Channel separation Input resistance Standby applied voltaga offset SVRR CHsep applied through 10%, 14.4V 10%, B.P.F. 20Hz 20kHz 100Hz, 0dBm 10k, 0dBm -300 Conditions 0.07 +300 Unit mVrms
Package Dimensions
unit (typ) 3109A
5245-2/9
LA4708
Arbitrarily large heat sink
heat sink, 1.5mm Tightening torque With silicone grease applied
Allowable power dissipation,
Heat sink thermal resistance,
1.5°C/W 2.0°C/W 3.2°C/W
2.0°C/W
4.1°C/W 7.0°C/W
Ambient temperature,
JK470801
Heat sink area,
1000 JK470802
Block Diagram
100F/ RIPPLE FILTER PREDRIVER 2.2F/ 6.3V POWER VCC1 OUTPUT PIN-TO-VCC SHORT PROTECTOR 2200F
INVERTING OUT1 0.1F 0.1F
PREDRIVER POWER
LOAD SHORT PROTECTOR
POWER GND1
NONINVERTING OUT1 BIAS CIRCUIT STANDBY OVERVOLTAGE/ SURGE PROTECTOR THERMAL SHUTDOWN OUTPUT PIN-TO-GND SHORT PROTECTOR OUTPUT PIN-TO-GND SHORT PROTECTOR POLYESTER FILM CAPACITOR
2.2F/ 6.3V
PREDRIVER
POWER LOAD SHORT PROTECTOR
NONINVERTING OUT2 0.1F 0.1F
POWER GND2
PREDRIVER NOISE PREVENTION CIRCUIT 33F/ 6.3V
POWER OUTPUT PIN-TO-VCC SHORT PROTECTOR
INVERTING OUT2
VCC2
Pins Don't use. connection.
Each Voltage
13.2V, applied through STBY 10k,
Name voltage Name voltage Name voltage 0.29 1.58 PWR-GND 1.58 2.08 +OUT 6.55 0.29 +OUT Pre-GND PWR-GND STBY VCC2 13.2 -OUT TIME 2.28 -OUT VCC1 13.2
5245-3/9
LA4708
Sample Print Pattern
OUT2
Copper foil area 105mm2
Description External Components
Input capacitors Decoupling capacitor (ripple filter) Amplifier time setting capacitor Power supply capacitor Oscillation blocking capacitors polyester film capacitors (Mylar capacitors) with good temperature characteristics. (R2, used jointly.) Since stability affected slightly pattern layout, etc., 0.1F more recommended. recommended (when applied voltage standby switch 2.5V 13.2V). This resistor cannot removed. Approximately second 33F. Since time proportional this capacitance, desired varying this capacitance. (Refer characteristics curve.) 2.2F recommended. varied capacitances adjust bass range.
Standby switch current limiting resistor
OUT1
5245-4/9
LA4708
Features Inside Usage Notes
Standby function standby switch pin. amplifier turned applying approximately 2.5V more this through external resistor (R1). voltage excess 13.2V applied standby switch, calculate value using following formula that current flowing into 500A less: Applied voltage 1.4V 500A
Mute function connector capacitor that determines time order prevent noise. grounding this pin, amplifier implement mute operation. this case, recovery time depends reduce noise Although LA4708 reduces noise, electrolytic capacitor between 0.47 2.2F connected between pre-GND further reduce noise that occurs when power supply turned on/off (standby switch on/off). larger capacitance, lower frequency noise, barely audible, sound residue sound signal liable linger when power turned off. bias output amplifier normally left open. Protectors output-to-ground output-to-VCC short protector system configuration, resistor connected between amplifier output GND, protector operate, causing amplifier start operating. Therefore, general rule, resistor should connected between amplifier output GND. order prevent damage degradation which caused abnormally heated LA4708 thermal shutdown protector. Accordingly, junction temperature (Tj) climbs around 180°C inadequate heat dissipation, thermal shutdown protector will operate control output gradually into attenuation. Also fully careful handling other protectors built LA4708. Miscellaneous Since pins which unused, connected internally, they must left open. internal connection).
5245-5/9
LA4708
ICCO
Open
1kHz 40dB Dual channel drive
Quiescent current, ICCO
Output power,
Supply voltage,
JK470806
Input level, mVrms
JK470807
1kHz Dual channel drive
1kHz Dual channel drive
Output power,
Output power,
Supply voltage,
JK470808
Supply voltage,
JK470809
Total harmoinc distortion,
13.2V Dual channel drive
13.2V Dual channel drive
Total harmoinc distortion,
10kH
100Hz
100H
1kHz
Output power,
JK470811
JK470810
Output power,
13.2V
Response
13.2V 0dBm 1kHz
Total harmoinc distortion,
Response
7100k
7100k JK470813
Input frequency,
JK470812
Input frequency,
5245-6/9
LA4708
Channel separation, CHSep
13.2V 0dBm
Output power,
13.2V 40dB Dual channel drive
710k
-100
100k
Input frequency,
JK470814
Input frequency,
JK470815
Ripple rejection ratio, SVRR
SVRR
100Hz VCCR 0dBm
Output noise voltage, mVrms
13.2V AUDIO
OUT1
OUT2
Input resistance,
100k
-100
2200F (power supply capacitor) changed 0.47F (Mylar)
JK470816
Supply voltage,
JK470817
SVRR
Ripple rejection ratio, SVRR
SVRR VCCR
13.2V 100Hz/3kHz
Ripple rejection ratio, SVRR
13.2V VCCR 0dBm
100Hz OUT1 OUT1 3kHz
OUT2
OUT2
-100
value power supply capacitor 0.47F (Mylar)
7100k
-100
value power supply capacitor 0.47F (Mylar) Calculate SVRR VCCR
Ripple frequency,
JK470818
Power supply ripple voltage, VCCR Vrms
JK470819
1kHz Dual channel drive
1kHz Dual channel drive
Allowable power dissipation package
Power dissipation,
37.5W
13.2
(VCC 13.2V)
Output power,
JK470820
Output power,
JK470821
5245-7/9
Current drain,
Current drain, Power dissipation,
LA4708
Open
ICCO
13.2V Open
Quiescent current, ICCO
Output voltage,
Supply voltage,
JK470822
Ambient temperature,
JK470823
Total harmonic distortion,
13.2V 1kHz Dual channel drive
Output power,
13.2V 1kHz Dual channel drive
Ambient temperature,
JK470824
Ambient temperature,
JK470825
time
Output voltage,
time
13.2V Apply standby (pin through 10k.
13.2V (Apply through 10k.)
Standby applied voltage,
JK470826
JK470827
5245-8/9
LA4708
SANYO Semiconductor Co.,Ltd. assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO Semiconductor Co.,Ltd. products described contained herein. SANYO Semiconductor Co.,Ltd. strives supply high-quality high-reliability products, however, semiconductor products fail malfunction with some probability. possible that these probabilistic failures malfunction could give rise accidents events that could endanger human lives, trouble that could give rise smoke fire, accidents that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO Semiconductor Co.,Ltd. products described contained herein controlled under applicable local export control laws regulations, such products require export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written consent SANYO Semiconductor Co.,Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO Semiconductor Co.,Ltd. product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. Upon using technical information products described herein, neither warranty license shall granted with regard intellectual property rights other rights SANYO Semiconductor Co.,Ltd. third party. SANYO Semiconductor Co.,Ltd. shall liable claim suits with regard third party's intellctual property rights which resulted from technical information products mentioned above.
This catalog provides information 2008. Specifications information herein subject change without notice.
5245-9/9

Monolithic Linear LA4708 Stereos 2-Channel Power Amplif

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