View LM1875_274039.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

UTC LM1875
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
20W AUDIO POWER AMPLIFIER
The UTC LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. The UTC LM1875 delivers 20 wants into a 4 or 8 load on +25V supplies.Using an 8 load and +30V supplies,over 30 watts of power may be delivered.The amplifier is designed to operate with a minimum ofexternal components.Device overload protection consists of both internal current limit and thernal shutdown. The UTC LM1875 design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels.Other outstanding features include high gain,fast slew rate and a wide power bandwidth,large output voltage swing,high current capability,and a very wide supply range.The amplifier is internally compensated and stable for gains of 10 or greater.
1
TO-220B
1
TO-220-5
1: +IN 4: Output
*2: -IN 5: Vcc
3: -VEE
FEATURES
*Up to 30 watts output power *Avo typically 90 dB *Low distortion: 0.015%,1kHz,20W *Wide power bandwidth: 70kHz *Protection for AC and DC short circuits to ground *Themal protection with parole circuit *High current capability: 4A *Wide supply range 16V-60V *Internal output protection diodes *94 dB ripple rejection
APPLICATIONS
*High performance audio systems *Bridge amplifiers *Stereo phonographs *Servo amplifiers *Instrument systems
UTC
UNISONIC TECHNOLOGIES
CO. LTD
1
QW-R107-019,B
UTC LM1875
TYPICAL APPLICATIONS
LINEAR INTEGRATED CIRCUIT
+Vcc C3 0.1F C1 2.2F VIN R1 1M R2 22k 2_ -VEE C4 0.1F 1 + C7 100F 4~8 + 5 LM1875 3 C6 + 100F 4 R5 1 C5 0.22F
R4 20k
R3 1K + C2 22F
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage Input Voltage Storage Temperature Junction Temperature Lead Temperature(Soldering,10 seconds)
SYMBOL
Vs VIN Tstg TJ TL
RATING
60 -VEE ~ Vcc -65 ~ +150 150 260
UNIT
V V
THERMAL DATA
DESCRIPTION
Thermal Resistance, Junction-case Thermal Resistance, Junction-ambient
SYMBOL
JC JA
RATING
3 73
UNIT
/W /W
ELECTRICAL CHARACTERISTICS
Vcc=+25V,-VEE=-25V,TAMBIENT=25,RL=8,Av=20(26dB),fo=1kHz,unless otherwise specified.
PARAMETER
Supply Current Output Power(Note 1) Total Harmonic Distortion (Note 1)
SYMBOL
Vs Po THD
TEST CONDITIONS
POUT=0W THD=1% POUT=20W,fo=1kHz POUT =20W, fo =20kHz POUT =20W,RL=4,fo=1kHz POUT =20W,RL=4,fo=20kHz
MIN
TYP
70 25 0.015 0.05 0.022 0.07 1
MAX
100
UNIT
mA W
0.4 0.6 15
%
mV
Offset Voltage
Vos
UTC
UNISONIC TECHNOLOGIES
CO. LTD
2
QW-R107-019,B
UTC LM1875
PARAMETER
Input Bias current Input Offset Current Gain-Bandwidth Product Open Loop Gain Power Supply Rejection Ratio
LINEAR INTEGRATED CIRCUIT
SYMBOL
Iib IIO GBW Gv PSRR
CONDITIONS
MIN
TYP
0.2 0 5.5 90 95 83 8 4 3
MAX
2 0.5
UNIT
A A MHz dB dB
Max Slew Rate SR V/s ILIM Current Limit VOUT=VSUPPLY - 10V 3 A Rs=600,CCIR Equivalent Input Noise en Vrms Voltage Note 1: Assumes the use of a heat sink having a thermal resistance of 1/W and no insulator with an ambient temperature of 25.Because the output limiting circuitry has a negative temperature coefficient,the maximum output power delivered to a 4load may be slightly reduced when the tab temperature exceeds 55.
Fo=20kHz DC Vcc,1kHz,1 Vrms VEE,1kHz,1 Vrms 20W,8,70kHz BW
52 52
TYPICAL APPLICATIONS(CONTINUED)
R1 22k + C2 10F R2 +Vcc C4 0.1F 22k
C1 1.0F VIN R4 1M
R3 22k 1 + 5
C7 + 100F C6 2200F + 4~ 8
LM1875 2_ 3
4
R7 1 C5 0.22F R6 200k
C3 R5 10F 10k +
UTC
UNISONIC TECHNOLOGIES
CO. LTD
3
QW-R107-019,B
UTC LM1875
THD vs Power Output 1.0 TOTAL HARMONIC DISTORTION(%)
LINEAR INTEGRATED CIRCUIT
THD vs Supply Voltage Vs=+25V 0.09 PD=10W 0.08 0.07 THD(%) 0.06 0.05 0.04 0.03 0.02 0.01 0 RL=4 RL=8 0.1
TYPICAL PERFORMANCE CHARACTERISTICS
0.1
0.01
0.1
1.0
10
100
20
50 100 200 500 1K 2K 5K 10K 20K FREQUENCY(Hz)
POWER OUTPUT(W) 35 30 POWE OUTPUT(W) 25 20 15 10 5 0 0 5 10 15 20 25 SUPPLY VOLTAGE(+V) 30 Power Output vs Supply Voltage RL=8 THD=1% SUPPLY CURRENT(mA) 100 80 Supply Current vs Supply Voltage
60 40 20 0
0
5
10
15
20
25
30
SUPPLY VOLTAGE(V) Device Dissipation vs Ambient Temperature 45 40 DEVICE DISSIP ATION(W) 35 30 25 20 15 10 5 0 0 10/W HEAT SINK 20 40 60 80 100 120 140 160 TA - AMBIENT TEMPERATURE() INTERFACE=1/W See Application Hints.
5/W HEAT SINK
PSRR vs Frequency 100 90 80 POSITIVE SUPPLY 70 60 50 40 30 20 10 0 20 INPUT REFERRED RS=0 RL=4 1 Vrms 50 100 200 500 1K 2K 5K10K 20K FREQUENCY(Hz) NEGATIVE SUPPLY
INFINITE HEAT SINK
PSRR(dB)
1/W HEAT SINK 2/W HEAT SINK
UTC
UNISONIC TECHNOLOGIES
CO. LTD
4
QW-R107-019,B
UTC LM1875
50 45 POWER DISSIPATION(W) 40 35 30 25 20 15 10 5 0 0 5 Vs=+25V Vs=+30V
LINEAR INTEGRATED CIRCUIT
Power Disipation vs Power Output 50 45 POWER DISSIPATION(W) 40 35 30 25 20 15 10 5 0 0 5 10 15 20 25 30 POW ER OUTPUT(W ) Open Loop Gain and Phase vs Frequency 30 25 15 GAIN(dB) 10 5 0 -5 -10 -15 0 5 10 15 20 25 -20 100k 1M FREQUENCY(Hz) 135 90 45 0 -45 -90 -135 -180 10M OHASE LAG(DEGREES) 20 180 Vs=+15V Vs=+20V Vs=+30V Vs=+25V RL=8 fo=1kHz
Power Disipation vs Power Output
Vs=+20V Vs=+15V RL=4 fo=1kHz 20 25 10 15 POW ER OUTPUT(W ) 30
IOUT vs VOUT-Current Limit/ Safe Operating Area Boundary 6 OUTPUT CURRENT(A) 4 2 0 -2 -4 -6 -25 -20 -15 -10 -5
OUTPUT VOLTAGE(V)
300 INPUT BIAS CURRENT(nA) 250
Input Bias Current vs Supply Volage TA=70
T A= 25
200 150
TA=0
100 0 0 5 10 20 25 15 SUPPLY VOLTAGE(+V) 30 * Thermal shutdown with infinite heat sink **Thermal shutdown with 1/ W heat sink
UTC
UNISONIC TECHNOLOGIES
CO. LTD
5
QW-R107-019,B
V+ 5 R8 1.7k Q13 R23 20k Q22 Q24 R33 26 S Q34 40X Z4 S Q35 500X Z5 Q43 3X R36 510 R32A 20 3X R31 75 S Q36 R21 30 R19 5k R38 20k R20 370 R22 30
UTC
R1 1.2k Q12 Q1 Q2 3 1 R18 2.7k Q21 Q28 10X S Q44 11 Q14 S Q27 10X
1
UTC LM1875
Q29 R2 3.3k R3 3.3k Q15 Q4 Q6 Z2 Z1 R10 3.6k Q5 R37 400
R29 3k
R32 0.25 R32B 20 4 Vout
Q3
Cin 2.2
Vin Q41
1 3x 3x Q26 Q46 2 1 3x 40X Q38 R30 200 Z6 R12 20k R34 75 Q32 Q40 Q31 R26 40k Q20 R14 395 R13 1k R17 910 R28 150 R27 450 S Q33 3x Z7 3X Rc 1 R11 1k S Q37 3x R39 510 R40 40 R35A 20 R35 0.25 R35B 20 C1 22 Cc 220n Load R41 20k
Rin 22k Q30 C1 Q18 Q17 R15 6k2 Z3 R24 80k R25 1.2k R11 820 C2 4p
Q47
Q42 S Q25
2 4p Q10 R12 450
UNISONIC TECHNOLOGIES
S Q39 500X Q9 Q7 R6 50k Q11 R4 6.8k R5 6.2k R7 15k Q8 R9 4.9k Q19 R15 3.3k S Q45 3X
Q48
C3
4p
LINEAR INTEGRATED CIRCUIT
CO. LTD
V- 3
6
QW-R107-019,B

▲Up To Search▲

Price & Availability of LM1875

	To Download LM1875 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .