View TPA12_5068775.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TPA12/ TPA12A
Power Operational Amplifier
THALER CORPORATION * 2015 N. FORBES BOULEVARD * TUCSON, AZ. 85745 * (520) 882-4000
FEATURES
* HIGH OUTPUT CURRENT - 15A PEAK * HIGH VOLTAGE RATING - 50V * LOW THERMAL RESISTANCE - 1.4 oC/W *CURRENT FOLDOVER PROTECTION * EXCELLENT LINEARITY - CLASS A/B OUTPUT
APPLICATIONS
* MOTOR, VALVE AND ACTUATOR CONTROL * MAGNETIC DEFLECTION CIRCUITS UP TO 10A * POWER TRANSDUCERS UP TO 100 kHz * AUDIO AMPLIFIERS UP TO 120W RMS
EQUIVALENT SCHEMATIC
DESCRIPTION
The TPA12 and TPA12A are designed for high voltage and high current applications. They can deliver up to 600 Watts of power to a load. The safe operating area (SOA) at the output stage can be guaranteed for all operating conditions by properly selecting the external current limiting resistor. The class A/B output stage delivers power with remarkably low distortion (see graph page 3). In order to maintain stable bias current and low distortion over the operating temperature range a resistor/thermistor network in the VBE multiplier is used to closely match the VBE of the output transistors.
3 D1 2 7 4 A1 5 1
8
6
EXTERNAL CONNECTIONS AND PIN CONFIGURATIONS
RCL+ +Vs +IN 4 -IN 5 6 -Vs 7 F.O. CL+ 3 2 1 OUT OUTPUT RCL-
TOP VIEW
8 CL-
TPA12/12A Rev. B Oct. 2006
TPA12/TPA12A
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Output Current, within SOA Power Dissipation, internal Input Voltage, differential Input Voltage, common mode 100V 15A 125W VS -3V VS Temperature, pin solder - 10s Temperature, junction1 Temperature range, storage Operating temperature range, case 300C 200C -65 to +150C -55 to +125C
Electrical Specifications
PARAMETER INPUT Offset Voltage, initial Offset Voltage, vs. temp. Offset Voltage, vs. supply Offset Voltage, vs. power Bias Current, initial Bias Current, vs. temp. Bias Current, vs. supply Offset Current, initial Offset Current, vs. temp. Input Impedance, DC Input Capacitance Common Mode Volt. Range3 Common Mode Rejection, DC GAIN Open Loop Gain at 10Hz Open Loop Gain at 10Hz Gain Bandwidth Product (1MHz) Power Bandwidth Phase Margin AV = +4 OUTPUT Voltage Swing3 Voltage Swing3 Voltage Swing3 Current, peak Settling Time to .1%, Slew Rate Capacitive Load Capacitive Load POWER SUPPLY Voltage Current, quiescent THERMAL Resistance, AC junction to case4 Resistance, DC junction to case Resistance, junction to air Temperature Range, case CONDITIONS
2,5
TPA12
MIN TYP 2 10 30 20 12 50 10 12 50 200 3 Vs-3 100 110 108 4 20 20 MAX 6 65 200 30 500 30 MIN TYP 1 * * * 10 * * 5 * * * * * * * * * *
TPA12A
MAX 4 40 * 20 * 20 UNITS mV V/C V/V V/W nA pA/C pA/V nA pA/C M pF V db db db MHz kHz o V V V A s V/s nF
Tc = 25C full temperature range Tc = 25C Tc = 25C Tc = 25C full temperature range T c= 25C T c= 25C full temperature range Tc = 25C Tc = 25C full temperature range full temp. range VCM = Vs-5 Tc = 25C, 1k load Full temp range, 8 load Tc = 25C, 8 load T c= 25C, 8 load Full temp range, 8 load
T c=25C,TPA12 =10A, TPA12A=15A
Vs-5 74
* *
96 13
* *
Tc = 25C, Io = 5A full temp range, Io = 80mA Tc = 25C T c= 25C, 2V step Tc = 25C full temp range, Av = 4 full temp range, Av >10 full temp range Tc = 25C
Vs-6 Vs-5 Vs-5 10 2.5 2 4 1.5 SOA 10 40 25 45 50
* * * 15 * * * * * * * * 50 *
V mA
Tc= -55 to +125C, F>60Hz Tc= -55 to +125C Tc= -55 to +125C Meets full range specifications
0.8 1.25 30 -25
0.9 1.4 +85 -55
* * *
* * +125
C/W C/W C/W C
Notes:
*Same as previous Model. 3. +Vs and -Vs denote the positive and negative supply rail respectively. Total Vs is measured from +Vs to -Vs. 4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 5. Exceeding CMV range can cause the output to latch.
1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 2. The power supply voltage for all specifications is 40V unless otherwise noted as a test condition.
Caution: The internal substrate contains beryllia (BeO). Do not crush, break, machine or subject the substrate to temperatures in excess of 850C. TPA12/12A Rev. B Oct. 2006
TYPICAL PERFORMANCE CURVES
POWER DERATING
INTERNAL POWER DISSIPATION (W) 140 NORMALIZED BIAS CURRENT (X) 120 100 80 60 40 20 0 0 20 40 60 80 100 120 140 CASE TEMPERATURE oC TPA12 TPA12A 2.5 2.2 1.9 1.6 1.3 1.0 .7 .4 -50 -25 0 25 50 75 100 125 CASE TEMPERATURE oC CURRENT LIMIT (A)
BIAS CURRENT
17.5 15.0 12.5 10.0 7.5 5.0 2.5
CURRENT LIMIT
RCL = 0.06, RFO = Vo = 0V RCL = 0.18, RFO = 0 Vo = 0V Vo = 24V
Vo = -24V 0 -50 -25 0 25
50
75 100 125
CASE TEMPERATURE oC
SMALL SIGNAL RESPONSE
120 100 OPEN LOOP GAIN (dB) 80 PHASE (o) 60 40 20 0 -20 1 10 100 1K 10K 100K 1M 10M FREQUENCY (Hz) 0
PHASE RESPONSE
100 68 OUTPUT VOLTAGE (VP-P) 46 32 22 15 10 6.8 1 10 100 1K 10K 100K 1M 10M 4.6 10K
POWER RESPONSE
abs(+Vs)+abs(-Vs)=100V
-30 -60 -90 -120 -150 -180 -210 FREQUENCY (Hz)
abs(+Vs)+abs(-Vs)=80V abs(+Vs)+abs(-Vs)=30V
20K
30K
50K 70K 100K
FREQUENCY (Hz)
COMMON MODE REJECTION
120 COMMON MODE REJECTION (dB) 100 80 60 40 20 0 8 6 OUTPUT VOLTAGE (V) 4 2 0 -2 -4 -6 -8 1 10 100 1K 10K 100K 1M
PULSE RESPONSE
100 VIN = 5V, tr = 100ns INPUT NOISE VOLTAGE (nV/Hz)) 70 50 40 30 20
INPUT NOISE
0
2
4
6
8
10
12
10
10
100
1K
10K
100K
FREQUENCY (Hz)
TIME (s)
FREQUENCY (Hz)
HARMONIC DISTORTION
3 1 DISTORTION (%) 0.3 0.1 0.03 0.01 0.003 100 300 1K 3K 10K 30K 100K FREQUENCY (Hz)
12 0W =
QUIESCENT CURRENT
1.6 6 VOLTAGE DROP FROM SUPPLY (V) 5 4
OUTPUT VOLTAGE SWING
AV = 10 VS = 37V RL = 4 NORMALIZED (X)
W 0m 10
W =4
1.4 1.2 1.0 0.8 0.6 0.4 40 50 60 70 80 90 100 TOTAL SUPPLY VOLTAGE (V)
Po
T c = -2
5o C T c = 25
oC
-Vo 3 +Vo 2 1 0 3 6 9 12 15 OUTPUT CURRENT (A) TPA12/12A Rev. B Oct. 2006
Po
Tc = 8
5
oC
oC
Tc = 1
25
= Po
DISCUSSION OF PERFORMANCE
SAFE OPERATING AREA (SOA)
The output stage of most power amplifiers has three distinct limitations: 1) The current handling capability of the transistor geometry and the wire bonds. 2) The second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceeds specified limits. 3) The junction temperature of the output resistors. transistors. SOA
OUTPUT CURRENT FROM +Vs OR -Vs (A) 15 10 6.0 4.0 2.0 1.0 0.6 0.4 0.3 10 20 30 40 50 70 100 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V)
TH
Vs 50V 40V 35V 30V 25V 20V 15V
Short to VS C,L or EMF Load 0.30A 0.58A 0.87A 1.50A 2.40A 2.90A 4.20A
Short to Common 2.4A 2.9A 3.7A 4.1A 4.9A 6.3A 8.0A
SECOND BREAKDOWN
ER
These simplified limits may be exceeded with further analysis using the operating conditions for a specific application.
t= m 0.5
t=
MA L
T T
C
=2 =8
3 oC
CURRENT LIMIT
For fixed current limit, leave pin 7 open and use the equations in 1 and 2. RCL = 0.65/LCL ICL = 0.65/RCL Where: ICL is the current limit in amperes. RCL is the current limit resistor in ohms. For certain applications the foldover current limit adds a slope to the current limit which allows more power to be delivered to the load without violating the SOA. For maximum foldover slope, ground pin 7and use equations 3 and 4. ICL= (0.65+(Vo*0.014)) / RCL RCL =( 0.65 + (Vo * 0.014)) / ICL Where Vo is the output voltage in volts. Most designers start with either equation 1 to set RCL for the desired output current at 0V out or with equation 4 set to RCL at the maximum output voltage. Equation 3 should then be used to plot the resulting foldover limits on the SOA graph. If equation 3 results in a negative current limit, foldover slope must be reduced. This can happen when the output voltage is the opposite polarity of the supply conducting the current. In applications where a reduced foldover slope is desired, this can be achieved by adding a resistor (RFO) between pin 7 and ground. Use equations 5 and 6 with this new resistor in the circuit. ICL= ((0.65+(VO*0.014)/(10.14+RFO)) / RCL RCL= ((0.65+(VO*0.014)/(10.14+RFO)) / ICL Where RFO is in K ohms.
TPA12/12A Rev. B Oct. 2006
s
s 1m
t=
s 5m
C
5 oC
T= C 125 o C
The SOA curves combine the effect of all limits for this Power Op Amp. For a given application, the direction and magnitude of the output current should be calculated or measured and checked against the SOA curves. This is simple for resistive loads but more complex for reactive and EMF generating loads. The following guidelines may save extensive analytical efforts. 1.Capacitive and dynamic* loads up to the following maximums are safe with the current limits set as specified.
Capacitive Load ILIM = 5A ILIM = 10A 200F 500F 2.0mF 7.0mF 25mF 60mF 150mF 125F 350F 850F 2.5mF 10mF 20mF 60mF Inductive Load ILIM = 5A ILIM= 10A 5mH 15mH 50mH 150mH 500mH 1,000mH 2,500mH 2.0mH 3.0mH 5.0mH 10mH 20mH 30mH 50mH
DY EA ST E AT ST
(1) (2)
(3) (4)
Vs 50V 40V 35V 30V 25V 20V 15V
2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rail or common if the current limits are set as follows at Tc = 25OC.
* If the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 8V below the supply rail with ILIM = 15A or 25V below the supply rail with ILIM = 5A while the amplifier is current limiting, the inductor must be capacitively coupled or the current limit must be lowered to meet SOA criteria.
(5) (6)
MECHANICAL
TO3-8 Package
TPA12/12A Rev. B Oct. 2006

▲Up To Search▲

Price & Availability of TPA12

	To Download TPA12 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .