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RB-TA3020-1
RB-TA3020-2
CLASS-T DIGITAL AUDIO AMPLIFIER REFERENCE BOARD USING DIGITAL POWER PROCESSING (DPP T M ) TECHNOLOGY
Technical Information Revision 3.0- March 2002
GENERAL DESCRIPTION The RB-TA3020 reference board is based on the TA3020 digital audio power amplifier driver from Tripath Technology. This board is designed to provide a simple and straightforward environment for the evaluation of the Tripath stereo TA3020 amplifier. This board can also be used in a bridged configuration for high power mono output. Note: There are two versions of the RB-TA3020, depending on nominal supply voltage. RB-TA3020-1 - Nominal supply voltage +/-21V to +/-39V RB-TA3020-2 - Nominal supply voltage +/-35V to +/-60V
Features
RB-TA3020-1: 2 x 70W continuous output power @ 0.1% THD+N, 4, +28V RB-TA3020-1: 250W continuous output power @ 0.1% THD+N, bridged 4, +28V RB-TA3020-2: 2 x 175W continuous output power @ 0.1% THD+N, 4, +45V RB-TA3020-2: 525W continuous output power @ 0.1% THD+N, bridged 4, +45V Outputs short circuit protected
Benefits
Uses only N-channel power MOSFETs Ready to use in many applications: 2 channel stereo systems Powered 2.1 speaker systems Powered Subwoofers
Note: RB-TA3020-2 shown
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OPERATING INSTRUCTIONS
Power Supply Description
There are four external power supplies required to operate this board: VPP, VNN, VN10, and V5 (see Figures 1 and 2). VPP and VNN power the load and so must each be able to provide half of the desired output power, plus about 20% for overhead and margin. The TA3020 amplifier also requires a supply, VN10, that is 10V more positive than VNN and tracks VNN. All output and power supply connections are made using tinned wire (not shown). Though not required, the following powering-up sequence is usually adhered to during bench evaluations: 1st) V5 and VN10, 2nd) VNN and 3rd) VPP (refer to the Turn-on/off Pop section). Please refer to the Turnon/off Pop section. The positive and negative supply voltages do not have to match or track each other, but distortion or clipping levels will be determined by the lowest (absolute) supply voltage. Figure 1 shows the proper supply configuration for the RB-TA3020.
VPP (yellow) V5 (red) VS 5V
AGND (black) PGND (blue) VS 10V VNN (orange)
Figure 1
VN10 (green)
Note: To avoid signal degradation, the Analog Ground and Power Ground should be kept separate at the power supply. They are connected locally on the RB-TA3020.
Connector J5 (Yellow) J5 (Blue) J5 (Orange) J5 (Green) J1 (Red) J1 (Black) Power Supply VPP PGND VNN VN10 V5 AGND
Table 1
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Input Connections
Audio input to the board is located at CH1 INPUT (J100) and CH2 INPUT (J200) (see Figures 2 and 3). The input can be a test signal or music source. A dual RCA cable is provided with female 100mil connectors that mate with J100 and J200.
Output Connections
There are two output connectors on the reference board for the speaker outputs. Channel 1 output and associated Power Ground 1 is located at J101. Channel 2 output and associated Power Ground 2 is located at J201. A two-wire harness for each output is provided. See Table 2 for the output connector wire colors. The TA3020 can be operated as a two-channel single-ended amplifier, bridged mono output amplifier (see Figure 9) or with a passive crossover for a 2.1 channel application (refer to Application Note 13). Outputs can be any passive speaker(s) or test measurement equipment with resistive load (see Application Note 4 for more information on bench testing). Connector Name J101 J201 Output White Red Table 2 Ground Blue Black
Turn-on/off Pop
To avoid turn-on pops, bring the mute from a high to a low state after all power supplies have settled. To avoid turn-off pops, bring the mute from a low to a high state before turning off the supplies. The only issue with bringing up the V5 last, or turning it off first, is clicks/pops. If the mute line is properly toggled (slow turn-on, quick turn-off), then any power up sequence is acceptable. In practice, the V5 will usually collapse before VPP and VNN. The same discussion holds true for the VN10 supply. It can collapse before VPP or VNN though this may cause a larger turn-off pop than if the mute had been activated before either the VN10 or V5 supply have collapsed. No damage will occur to the TA3020 if either the V5 or VN10 collapse before VPP or VNN, assuming the mute is asserted before the supplies start to discharge.
HMUTE
There is an LED, D1, which will illuminate if a fault condition is reported. HMUTE, pin 15, will illuminate D1 via R2, if the processor detects an over or under voltage fault, as well as an over current fault. In addition, if MUTE is high (by removing jumper on J4), the LED will also be illuminated. An over/under voltage fault will automatically reset (and D1 will turn off) once the supply voltage is brought back into specification. If an over current condition occurs, cycle the MUTE pin (by removing the jumper on J4 and then replacing it). Assuming all supplies are still within specification, the HMUTE LED will be off and the TA3020 reference board will again amplify input signals.
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RB-TA3020 Board
Power In: VPP (yel) PGND (blu) VNN (org) VN10 (grn)
Channel 1 Output & Ground
Channel 1 Offset
Channel 1 Input & AGND
AGND (blk) V5 (red) Channel 2 Input & AGND Channel 2 Offset Break Before Make Jumpers
Output Transistors
Channel 2 Output & Ground
HMute LED
Mute Jumper
Figure 2
HEATSINK
OUT1 M100 GND1 AGND
Ch1 Offset
-+
28V (-1 VERSION) 45V (-2 VERSION)
IN1 AGND V5 VPP PGND VNN VN10 M201 HMUTE LED AGND IN2 M200 Ch2 Offset TA3020 AUDIO SOURCE
M101
28V (-1 VERSION) 45V (-2 VERSION)
10V
-+ -+
GND2 OUT2
BBM1 BBM0 MUTE
Figure 3
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ARCHITECTURE
A block diagram of one channel of the reference board is shown in Figure 4. The major functional blocks of the amplifier are described below.
In
Input Stage
TA3020
Output Section
Out
Figure 4 Note: The TA3020 is an inverting amplifier.
TA3020 Amplifier Gain
The TA3020 amplifier gain is the product of the input stage gain and the modulator gain. AVTA3020 = AVINPUTSTAGE * AVMODULATOR
AVTA3020 - RF RFBC (RFBA +RFBB ) x + 1 RI RFBA RFBB
For the RB-TA3020-2 board; RI (R100, R200) = 49.9k RF (R101, R201) = 20k RFBA (R105, R205) = 1k RFBB (R110, R210) = 1.07k RFBC (R106, R206) = 13.3k
AVTA3020 - 20k 13.3k (1k+1.07k ) x + 1 = 10.71 V V 49.9k 1k 1.07k
Input Stage Figure 5 shows one channel of the Input Stage. The TA3020 amplifier is designed to accept unbalanced inputs. For the RB-TA3020-1, the gain is 6.4, or approximately 16 dB. For the RB-TA3020-2, the gain is 10.8, or approximately 20.7 dB. Please note that the input stage of the TA3020 is biased at approximately 2.5VDC. Therefore, for an input signal centered around ground (0VDC), the polarity of the coupling capacitor, CIN, shown in Figure 5 is correct.
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49.9K RIN V5
2.2uF, 50V + CIN 1M 1M Input to TA3020
(DC Bias ~2.5V)
10K 0.1uF, 50V
Figure 5
The value of the input capacitor, CIN, in Figure 5 (labeled C100 and C200 on the schematic), and the input resistor, RIN (labeled R100 and R200), set the -3dB point of the input high-pass filter. The frequency of the input high pass pole, FP, -3dB point can be calculated as follows: FP = 1/(2 x CIN x RIN ) where: CIN = input capacitor value in Farads RIN = input resistor value in Ohms Output offset voltages can be nulled by adjusting the 10K potentiometer shown in Figure 5. Once set, the offset does not typically drift with temperature, so no tracking circuitry is required. Offsets can typically be set to +/- 25 mV. R104 is used to adjust the offset of CH1, and R204 is used to adjust the offset of CH2. If a different TA3020 is placed in the RB-TA3020 reference board, the offset of each channel will need to be re-trimmed. RB-TA3020 Control Circuitry The MUTE pin is brought out to an external 2-pin header, J4 (Figure 6). When a jumper is installed from Pin 1 to 2 of J4, the MUTE line is pulled to ground and the outputs are enabled. Note that if the MUTE jumper is removed, the MUTE pin floats high, and the amplifier is muted.
ROCR
OCR2 J4 MUTE
24
+5V R111 BBM0
22
33
J2
C103 31 R211
23
+5V BBM1 J3
AGND
OCR1
C203
Figure 6
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The resistors, ROCR in Figure 6 (labeled R111 and R211 in the schematic), set the overcurrent threshold for the output devices. Note that these are NOT the sense resistors (the overcurrent sense resistors, RS, are in the output stage). By adjusting the ROCR resistor values, the threshold at which the amplifier "trips" can be changed. The range that the overcurrent trip point can be adjusted (by changing ROCR) is determined by the value of the sense resistors. ROCR on this reference board is pre-set to 20K for a 4 single-ended application. For lower impedance applications (i.e. 4 bridged), this board's overcurrent may trip prematurely. This is indicated by the amplifier going into mute; to clear, toggle the mute or cycle the power. To reduce overcurrent sensitivity, decrease the value of ROCR until the sensitivity meets the desired level. ROCR can be reduced, though if set too low of a value, this may result in an overcurrent threshold that is so high the amplifier will try to drive a short circuit, possibly damaging the output FETs. Finally, the Break-Before-Make (or "BBM") lines are used to control the "dead time" of the output FETs. The "dead time" is the period of time between the turn-off of one device and the turn-on of the opposite device on the same channel. If the two devices are both on at the same time, current "shoots through" from one supply to the other, bypassing the load altogether. Obviously, this will have a great impact on the overall efficiency of the amplifier. However, if the dead time is too long, linearity suffers. The optimum BBM setting will change with different output FETs, different operating voltages, different layouts and different performance requirements. For this reason, Tripath has provided a means to adjust the BBM0 setting, via jumper J2, on the 3-pin header (see Figure 6). Please note that BBM1 is hardwired to "0" on the RB-TA3020 since operating the reference board with BBM delays of 40nS or less will result in significant shoot through current and possible MOSFET destruction. These settings should be verified over the full temperature and load range of the application to ensure that any thermal rise of the output FETs and TA3020 does not impact the performance of the amplifier. This amplifier board is set to 80nS, and the table below shows the BBM values for various settings of the jumpers (Figure 7).
BM1 BM0
Delay 0 1 0 1 120nS 80nS 40nS 0nS
J3 0
1) 2) 3) 4)
0 0 1 1
J2 0
1
1
BB delay BBM1 Note: The default M0 jumper setting is 80nS.
Figure 7
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Output Section The output section includes the gate resistors, output diodes, FETs, output filters, the previously mentioned OVERCURRENT sense resistors, clamping diodes, a Zobel Network, and various bypass capacitors.
OCSHN R115/215 0.01
OCSHP VPP
M100/200 HO R113/213 5.6 HOCOM
C105/205 0.1uF, 250V D106/206 MUR120 C113/223 33uF, 160V
+
C106/206 0.1uF, 100V C7 330uF, 63V
L100/200 11.3uH
OUT
FBKOUT C108/208 0.22uF, 100V R117/217 33 /2W
M101/201 LO R114/214 5.6 LOCOM
D107/207 MUR120
C109/209 0.1uF, 100V R116/216 0.01
VNN
+
C110/210 0.1uF, 100V OCSLP OCSLN
C6 330uF, 63V
Figure 8
The gate resistors (labeled R113, R213, R114, and R214 in Figure 8 and the attached schematic) are used to control MOSFET switching rise/fall times and thereby minimize voltage overshoots. They also dissipate a portion of the power resulting from moving the gate charge each time the MOSFET is switched. If RG is too small, excessive heat can be generated in the driver. Large gate resistors lead to slower gate transitions resulting in longer rise/fall times and thus requiring a larger BBM setting. Tripath recommends using an RG of 5.6 when the Qg is greater than 70nC and RG of 10 when the gate charge (Qg) of the output FET is less than 70nC. The output FETs (M100, M101, M200 and M201) provide the switching function required of a Class-T design. They are driven directly by the TA3020 through the gate resistors. The devices used on the reference board are ST STW34NB20 MOSFETs. The TA3020 data sheet contains information on output FET selection as well as Tripath application notes "FETs - Selection and Efficiency" and "Designing with Switching Amplifiers for Performance and Reliability". The bypass capacitors C105/C205 and C113/c213 are critical to the reduction of ringing on the outputs of the FETs. These parts are placed as closely as possible to the leads of the FETs, and the leads of the capacitors themselves are as short as practical. Their values will not change with different output FETs. The output diodes D106/D107/D206/D207 are also critical to the reduction of ringing on the outputs of the FETs. They shunt the inductive energy if the output exceeds VPP or goes below VNN. The proper connection of these diodes are "drain to drain" and "source to source" as shown in the schematic diagrams. The output filters L100/C108 and L200/C208 are the low-pass filters that recover the analog audio signal. One of the benefits of the Class-T design is the ability to use output filters with relatively high cutoff frequencies. This greatly reduces the speaker interactions that can occur with the use of lower-frequency filters common in Class-D designs. Also, the higher-frequency operation means that the filter can be of a lower order (simpler and less costly).
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The OEM may benefit from some experimentation in the filter design, but the values provided in the reference design, 11.3uH and 0.22uF (nominal resonant frequency of 101kHz), provide excellent results for most loads between 4 and 8. As important as the values themselves, the material used in the core is important to the performance of the filter. Core materials that saturates too easily will not provide acceptable distortion or efficiency figures. Tripath recommends a low-mu core, like type 2, iron powder cores. Micrometals, (www.micrometals.com), is a main supplier of iron powder cores. The core part number used on the RBTA3020 is T106-2 and is wound with 29 turns of 16AWG wire. The Zobel circuits R117/C109 and R217/C209 are there in case an amplifier is powered up with no load attached. The Q of the LC output filter, with no load attached, rises quickly out to 80kHz. Resonant currents in the filter and ringing on the output could reduce the reliability of the amplifier. The Zobel eliminates these problems by reducing the Q of the network significantly above 50kHz. Modifying the LC output filter should not require a recalculation of the Zobel value, though depending on application, the power capability of R117 and R217 may need to be increased to 5W from 2W. The components used on the reference board should be quite adequate for almost all applications. The bypass capacitors C105/C205 are critical to the reduction of ringing on the outputs of the FETs. These parts are placed as closely as possible to the leads of the FETs, and the leads of the capacitors themselves are as short as practical. Their values will not change with different output FETs. Connection Diagram for Bridge Mode Operation The amplifier is connected to the power supplies and load as shown in Figure 9. Note that an inverter has been added in front of one of the channel inputs (i.e. Channel 2). The main reason for processing the channels out of phase is to avoid potential problems with switching power supplies, but it also simplifies the connections for bridged-mode operation. For bridged operation, simply connect the "-" terminal to the output of the inverted channel* (Channel 1 output, J101 pin 1) and the "+" terminal to the output of the non-inverted channel with respect to the input signal (Channel 2 output, J201 pin 2). The connection shown in Figure 9 is the easiest way to use the RB-TA3020 to test bridged mode operation. If the evaluation setup does not provide two out of phase signals, there is another way to evaluate bridge mode operation. This requires the RB-TA3020 to be modified. Change R201 to 20K from 49.9K. Connect Pin 26 (OAOUT1) to IN2 on J200. The input signal is still applied to (J100) and is inverted on chip thus providing the input signal for Channel 2 via J200. If the gain of the system needs to be modified, R101 can be adjusted. R201 should be left at 20K. If stereo operation is again desired, then the value of R101 and R201 must be made the same to ensure nominal gain for both channels. Additionally, the connection between Pin 26 and IN2 on J200 should be removed.
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HEATSINK
OUT1 M100 GND1
+
Ch1 Offset
AGND
-+
28V (-1 VERSION) 45V (-2 VERSION)
IN1 AGND V5 VPP PGND VNN VN10 M201 Ch2 Offset AGND IN2 M200 TA3020 AUDIO SOURCE
M101
28V (-1 VERSION) 45V (-2 VERSION)
-+ -+
10V
HMUTE LED
GND2 OUT2
BBM1 BBM0 MUTE
Figure 9
Circuit Board Layout
The TA3020 is a power (high current) amplifier that operates at relatively high switching frequencies. The output of the amplifier switches between VPP and VNN at high speeds while driving large currents. This high-frequency digital signal is passed through an LC low-pass filter to recover the amplified audio signal. Since the amplifier must drive the inductive LC output filter and speaker loads, the amplifier outputs can be pulled above the supply voltage and below ground by the energy in the output inductance. To avoid subjecting the TA3020 to potentially damaging voltage stress, it is critical to have a good printed circuit board layout. It is recommended that Tripath's layout and application circuit be used for all applications and only be deviated from after careful analysis of the effects of any changes. Please refer to the TA3020 evaluation board document, EB-TA3020, available on the Tripath website, at www.tripath.com. The following components are important to place near either their associated TA3020 or output MOSFET pins. The recommendations are ranked in order of layout importance, either for proper device operation or performance considerations. The component designators, referred to, are for channel 1 of the RB-TA3020. The capacitors, CHBR (C105/C113), provide high frequency bypassing of the amplifier power supplies and will serve to reduce spikes across the supply rails. Please note that both mosfet half-bridges must be decoupled separately. In addition, the voltage rating for CHBR should be at least 150V as this capacitor is exposed to the full supply range, VPP-VNN. DO (D106/D107) are also critical to the reduction of ringing on the outputs of the FETs. They shunt the inductive energy if the output exceeds VPP or goes below VNN. The proper connection of these diodes are "drain to drain" and "source to source" as shown in the schematic diagrams. These diodes have a 200V rating. CFB (C107) removes very high frequency components from the amplifier feedback signals and lowers the output switching frequency by delaying the feedback signals. In addition, the value of CFB is different for channel 1 and channel 2 to keep the average switching frequency difference greater than 40kHz. This minimizes in-band audio noise. Locate these capacitors as close to their respective TA3020 pin as possible.
RB-TA3020, Rev. 3.0/03.02
-
-
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-
To minimize noise pickup and minimize THD+N, RFBC (R106/R109) should be located as close to the TA3020 as possible. Make sure that the routing of the high voltage feedback lines is kept far away from the input op amps or significant noise coupling may occur. It is best to shield the high voltage feedback lines by using a ground plane around these traces as well as the input section. CB (C111), CSW (C5) provides high frequency bypassing for the VN10 and bootstrap supplies. Very high currents are present on these supplies.
-
In general, to enable placement as close to the TA3020, and minimize PCB parasitics, the capacitors CFB, CB and CSW should be surface mount types, located on the "solder" side of the board. Some components are not sensitive to location but are very sensitive to layout and trace routing. To maximize the damping factor and reduce distortion and noise, the modulator feedback connections should be routed directly to the pins of the output inductors. LO (L100). The output filter capacitor, CO (C108), and zobel capacitor, CZ (C109), should be star connected with the load return. The output ground feedback signal should be taken from this star point. The modulator feedback resistors, RFBA (R105/R108) and RFBB (R107/R110), should all be grounded and attached to 5V together. These connections will serve to minimize common mode noise via the differential feedback. The feedback signals that come directly from the output inductors are high voltage and high frequency in nature. If they are routed close to the input nodes, INV1 and INV2, the high impedance inverting opamp pins will pick up noise. This coupling will result in significant background noise, especially when the input is AC coupled to ground, or an external source such as a CD player or signal generator is connected. Thus, care should be taken such that the feedback lines are not routed near any of the input section. To minimize the possibility of any noise pickup, the trace lengths of INV1 and INV2 should be kept as short as possible. This is most easily accomplished by locating the input resistors, RI (R100), and the input stage feedback resistors, RF (R101), as close to the TA3020 as possible. In addition, the offset trim resistor, ROFB (R103), which connects to either INV1, or INV2, should be located close to the TA3020 input section.
-
-
-
Performing Measurements on the EB-TA3020
The TA3020 operates by generating a high frequency switching signal based on the audio input. This signal is sent through a low-pass filter that recovers an amplified version of the audio input. The frequency of the switching pattern is spread spectrum in nature and typically varies between 100kHz and 1MHz, which is well above the 20Hz - 20kHz audio band. The pattern itself does not alter or distort the audio input signal, but it does introduce some inaudible components. The measurements of certain performance parameters, particularly noise related specifications such as THD+N, are significantly affected by the design of the low-pass filter used on the output as well as the bandwidth setting of the measurement instrument used. Unless the filter has a very sharp roll-off just beyond the audio band or the bandwidth of the measurement instrument is limited, some of the inaudible noise components introduced by the TA3020 amplifier switching pattern will degrade the measurement. One feature of the TA3020 is that it does not require large multi-pole filters to achieve excellent performance in listening tests, usually a more critical factor than performance measurements. Though using a multi-pole filter may remove high-frequency noise and improve THD+N type measurements
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(when they are made with wide-bandwidth measuring equipment), these same filters degrade frequency response. The RB-TA3020 Reference Board has a simple two-pole output filter with excellent performance in listening tests.
(See Application Note 4 for more information on bench testing)
Revision Changes
Revision 3.0 - Added capacitors C113 & C213 in Bill of Materials, Schematics, and Layout. Added gate diodes and output diodes to design.
Documentation
Soft copies of the schematics and layout can be provided upon request (available in Protel format). Gerber files are also available.
Contact Information
TRIPATH TECHNOLOGY, INC 2560 Orchard Parkway, San Jose, CA 95131 408.750.3000 - P 408.750.3001 - F For more Sales Information, please visit us @ www.tripath.com/cont_s.htm For more Technical Information, please visit us @ www.tripath.com/data.htm
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1 VSS
VPP
2
3
4
R215 0.01OHM/2W C213 33uF/160V C205 0.1uF/250V
M200 STW34NB20
D204 MUR120 R213 5.6OHM/1W R218 510K, 5% R220 WIRE
C8 47uF/25V
C5 0.1uF VSS+10
I1 1 VN10 LO1 48 C112 0.1uF 2 LO2 LO1COM 47 D103 MURS120T3 3 LO2COM HO1COM 46
D104 MUR120 R113 5.6OHM/1W
M100 STW34NB20 C105 0.1uF/250V R118 510K, 5%
R115 0.01OHM/2W C113 33uF/160V
VPP
C206 0.1uF/250V
C106 0.1uF/250V
D206 MUR120 D AMPOUT2 C209 0.1uF/100V R217 20OHM/5W PGND2
VSS
C212 0.1uF D203 MURS120T3 4
R120 WIRE
D106 MUR120 L100 11uH 1 2 C108 0.22uF/100V AMPOUT1 C109 0.1uF/100V R117 20OHM/5W D
L200 11uH 2 C208 0.22uF/100V 1
D207 MUR120
M201 STW34NB20
D205 MUR120 R214 5.6OHM/1W R219 510K, 5% R221 WIRE 5
HO2COM
HO1
45 D105 MUR120 M101 STW34NB20 D107 MUR120
HO2
OCS1HN
44
R114 5.6OHM/1W R119 510K, 5% R121 WIRE R112 240 OHM, 5% C110 0.1uF/250V FB1
R216 0.01OHM/2W
6
OCS2LN
OCS1HP
43
PGND1 R116 0.01OHM/2W
VSS
C210 0.1uF/250V
7
OCS2LP
OCS1LP
42
FB2 R212 240 OHM, 5% 8 OCS2HP OCS1LN 41 D102 MURS120T3 9 C204 47uF/25V C211 0.1uF D202 MURS120T3 10 VBOOT2 VNN 39
VSS
AMP OUTPUT 2 J201 AMPOUT2 PGND2
C111 0.1uF
C104 47uF/25V AMP OUTPUT 1 J101 AMPOUT1 PGND1 C
OCS2HN
VBOOT1
40
C
V5
11 AGND OCRNT2 12
R105 1K, 1% R106 FB1 8.25K, 1% C107 150pF R109 PGND1 8.25K, 1% R110 1.13K, 1% D1 AGND
V5
NC
NC
38 AGND
OCR2
OCR1
37
OCRNT1 C6 330uF/63V
R107 1.13K, 1%
POWER SUPPLY CONNECTOR J5 VSS+10 1 VSS 2 3 VPP 4 C7 330uF/63V
R108 1K, 1%
FN1
13
FBKOUT1
NC
36 AGND
FP1
14
FBKGND1
V5
35
V5
R2 2K, 5%
C3 0.1uF 15 HMUTE DGND 34 AGND 16 FBKOUT2 OCR1 33 C103 220pF AGND AGND B OCRNT2 C203 220pF 19 BIASCAP VNNSENSE 30 AGND 20 INV2 VPPSENSE 29 R211 20K,1%
VSS
AGND
R205 1K, 1% R206 FB2 8.25K, 1% C207 270pF R209 PGND2 8.25K, 1% R210 1.13K, 1% R207 1.13K, 1%
LED
FN2
OCRNT1 R1 8.25K, 1% R111 20K,1%
17 R208 1K, 1% AGND
FP2
DCOMP
REF1
32
B
18
FBKGND2
OCR2
31
NOTE: D106, D107, D206, D207 ARE MUR120 DIODES SOLDERED DIRECTLY TO FET LEADS ON BOTTOM OF BOARD C113 AND C213 ARE SOLDERED DIRECTLY TO FET LEADS ON BOTTOM OF BOARD
5V INPUT CONNECTOR J1 V5 AGND J200
C4 0.1uF R200 49.9K,1% AGND
IN2
AGND C200 2.2uF AGND
R4 249K, 1%
VPP
R201 20K,1%
C201 33pF 21 J2 V5 22 J3 BBM0 V5 27
V5
OAOUT2
AGND
28 C1 AGND 0.1uF
R5 750M, 1%
R6 267K, 1%
BBM 0 SET TO 5V
BBM0
R7 267K, 1% 23 BBM1 OAOUT1 26 C101 33pF 24 AGND R203
IN2 V5
BBM 1 SET TO 0V J4 MUTE
BBM1 R3 1K, 1%
R101 20K,1%
IN1
MUTE TA3020
INV1
25
R100 49.9K,1%
C100 2.2uF
J100
REMOVE J4 SHUNT TO ENABLE MUTE A CH 2 OFFSET TRIM R204 10K POT
V5
CON2INPT AGND A
R202 510K, 5%
510K, 5% C202 0.1uF AGND 1
L1 FBEAD
IN1
R103
R102 510K, 5% C102 0.1uF
V5
510K, 5% 2
CH 1 OFFSET TRIM R104 10K POT
Title Size C Date: File:
EB-TA3020-2 BOARD - NOMINAL SUPPLY +/-21V - +/-39V
Number Revision
AGND
AGND
BOARD REVISION 3.0
26-Mar-2002 C:\WINDOWS\..\2139R301.SCH 4 Sheet of Drawn By:
SCH REV. 3.01
1
2
3
C:\WINDOWS\DESKTOP\LAYOUT~1\TA3020\REV3_0\2139R301.BOM 10:43:25 26-Mar-2002
Bill of Material for C:\WINDOWS\DESKTOP\LAYOUT~1\TA3020\REV3_0\2139R301.Sch Used ==== 4 10 2 6 2 4 2 2 1 5 2 4 2 2 2 1 2 1 1 2 2 2 3 2 4 8 1 5 2 2 1 1 1 1 2 1 8 4 4 1 4 4 Part Type =========== 0.01OHM/2W 0.1uF Designator ==================== R115 R116 R215 R216 C1 C102 C111 C112 C202 C211 C212 C3 C4 C5 0.1uF/100V C109 C209 0.1uF/250V C105 C106 C110 C205 C206 C210 0.22uF/100V C108 C208 1.13K, 1% R107 R110 R207 R210 10K POT R104 R204 11uH L100 L200 150pF C107 1K, 1% R105 R108 R205 R208 R3 2.2uF C100 C200 20K,1% R101 R111 R201 R211 20OHM/5W R117 R217 220pF C103 C203 240 OHM, 5% R112 R212 249K, 1% R4 267K, 1% R6 R7 270pF C207 2K, 5% R2 330uF/63V C6 C7 33pF C101 C201 33uF/160V C113 C213 47uF/25V C104 C204 C8 49.9K,1% R100 R200 5.6OHM/1W R113 R114 R213 R214 510K, 5% R102 R103 R118 R119 R202 R203 R218 R219 750M, 1% R5 8.25K, 1% R1 R106 R109 R206 R209 CON2 J101 J201 CON2INPT J100 J200 CON2LPWR J1 CON4 J5 FBEAD L1 HDR2 J4 HDR3 J2 J3 LED D1 MUR120 D104 D105 D106 D107 D204 D205 D206 D207 MURS120T3 D102 D103 D202 D203 STW34NB20 M100 M101 M200 M201 TA3020 I1 WIRE R120 R121 R220 R221 ALUMINUM OXIDE ISOLATING WASHER Footprint =========== RLVR1RG2 0805 C0U1MF10 C0U1MF10 C0U22MF10 0805 POTSTURN T106 0805 0805 C10UEL05 0805 R33R3W 0805 0805 0805 0805 0805 0805 C100UEL06 0805 C100UEL06 C10UEL05 0805 RES1WFLT 0805 0805 0805 PWR2 CON2 CON2B PWR4 2512 GJMPR001 GJMP3001 LED1 DIODE60 SMB TO3P&220RGT DIP48 RES1WFLT Part Field 1 ===================== OHMITE 20% TOL. PANASONIC PANASONIC PANASONIC * BOURNS COIL WINDING SPEC NPO 5% * PANASONIC * XICON NPO 5% * * * NPO 5% PANASONIC NPO 5% PANASONIC PANASONIC * PANASONIC * * * WALDOM WALDOM WALDOM WALDOM * * * RED LED ON SEMICONDUCTOR ON SEMICONDUCTOR ST MICROELECTRONICS TRIPATH 22AWG SOLID CORE WIRE AAVID THERMALLOY Part Field 2 ============ 12FR010 * ECH-S1104JZ ECQ-E2104KF ECH-S1224JZ * 3306P-1-103 T106-2 CORE * * ECA-1HHG2R2 * ERG-2SJ330 * * * * * EEU-FC1J331 * EEU-EB2C330 ECA-1EHG470 * ERG-1SJ5R6 * * * 26-60-4020 705-43-0001 22-23-2021 26-60-4040 * * * * MUR120 MURS120T3 * * 4170 Part Field 3 =============== DK 12FR010-ND * DK PS1104J-ND DK EF2104-ND DK PS1224J-ND * DK 3306P-103-ND 29TURNS / 16AWG * * DK P5564-ND * MSR 280-PRM5-20 * * * * * DK P10349-ND * DK P5901-ND DK P5539-ND * P5.6W-1BK-ND * * * DK DK DK DK * * * * * * * * WM4620-ND WM4800-ND WM4200-ND WM4622-ND
1 VSS
VPP
2
3
4
R215 0.01OHM/2W C213 33uF/160V C205 0.1uF/250V
M200 STW34NB20
D204 MUR120 R213 5.6OHM/1W R218 510K, 5% R220 WIRE
C8 47uF/25V
C5 0.1uF VSS+10
I1 1 VN10 LO1 48 C112 0.1uF 2 LO2 LO1COM 47 D103 MURS120T3 3 LO2COM HO1COM 46
D104 MUR120 R113 5.6OHM/1W
M100 STW34NB20 C105 0.1uF/250V R118 510K, 5%
R115 0.01OHM/2W C113 33uF/160V
VPP
C206 0.1uF/250V
C106 0.1uF/250V
D206 MUR120 D AMPOUT2 C209 0.1uF/100V R217 20OHM/5W PGND2
VSS
C212 0.1uF D203 MURS120T3 4
R120 WIRE
D106 MUR120 L100 11uH 1 2 C108 0.22uF/100V AMPOUT1 C109 0.1uF/100V R117 20OHM/5W D
L200 11uH 2 C208 0.22uF/100V 1
D207 MUR120
M201 STW34NB20
D205 MUR120 R214 5.6OHM/1W R219 510K, 5% R221 WIRE 5
HO2COM
HO1
45 D105 MUR120 M101 STW34NB20 D107 MUR120
HO2
OCS1HN
44
R114 5.6OHM/1W R119 510K, 5% R121 WIRE R112 240 OHM, 5% C110 0.1uF/250V FB1
R216 0.01OHM/2W
6
OCS2LN
OCS1HP
43
PGND1 R116 0.01OHM/2W
VSS
C210 0.1uF/250V
7
OCS2LP
OCS1LP
42
FB2 R212 240 OHM, 5% 8 OCS2HP OCS1LN 41 D102 MURS120T3 9 C204 47uF/25V C211 0.1uF D202 MURS120T3 10 VBOOT2 VNN 39
VSS
AMP OUTPUT 2 J201 AMPOUT2 PGND2
C111 0.1uF
C104 47uF/25V AMP OUTPUT 1 J101 AMPOUT1 PGND1 C
OCS2HN
VBOOT1
40
C
V5
11 AGND OCRNT2 12
R105 1K, 1% R106 FB1 13.3K, 1% C107 150pF R109 PGND1 13.3K, 1% R110 1.07K, 1% D1 AGND
V5
NC
NC
38 AGND
OCR2
OCR1
37
OCRNT1 C6 330uF/63V
R107 1.07K, 1%
POWER SUPPLY CONNECTOR J5 VSS+10 1 VSS 2 3 VPP 4 C7 330uF/63V
R108 1K, 1%
FN1
13
FBKOUT1
NC
36 AGND
FP1
14
FBKGND1
V5
35
V5
R2 2K, 5%
C3 0.1uF 15 HMUTE DGND 34 AGND 16 FBKOUT2 OCR1 33 C103 220pF AGND AGND B OCRNT2 C203 220pF 19 BIASCAP VNNSENSE 30 AGND 20 INV2 VPPSENSE 29 R211 20K,1%
VSS
AGND
R205 1K, 1% R206 FB2 13.3K, 1% C207 270pF R209 PGND2 13.3K, 1% R210 1.07K, 1% R207 1.07K, 1%
LED
FN2
OCRNT1 R1 8.25K, 1% R111 20K,1%
17 R208 1K, 1% AGND
FP2
DCOMP
REF1
32
B
18
FBKGND2
OCR2
31
NOTE: D106, D107, D206, D207 ARE MUR120 DIODES SOLDERED DIRECTLY TO FET LEADS ON BOTTOM OF BOARD C113 AND C213 ARE SOLDERED DIRECTLY TO FET LEADS ON BOTTOM OF BOARD
5V INPUT CONNECTOR J1 V5 AGND J200
C4 0.1uF R200 49.9K,1% AGND
IN2
AGND C200 2.2uF AGND
R4 392K, 1%
VPP
R201 20K,1%
C201 33pF 21 J2 V5 22 J3 BBM0 V5 27
V5
OAOUT2
AGND
28 C1 AGND 0.1uF
R5 1.18M, 1%
R6 422K, 1%
BBM 0 SET TO 5V
BBM0
R7 422K, 1% 23 BBM1 OAOUT1 26 C101 33pF 24 AGND R203
IN2 V5
BBM 1 SET TO 0V J4 MUTE
BBM1 R3 1K, 1%
R101 20K,1%
IN1
MUTE TA3020
INV1
25
R100 49.9K,1%
C100 2.2uF
J100
REMOVE J4 SHUNT TO ENABLE MUTE A CH 2 OFFSET TRIM R204 10K POT
V5
CON2INPT AGND A
R202 510K, 5%
510K, 5% C202 0.1uF AGND 1
L1 FBEAD
IN1
R103
R102 510K, 5% C102 0.1uF
V5
510K, 5% 2
CH 1 OFFSET TRIM R104 10K POT
Title Size C Date: File:
EB-TA3020-2 BOARD - NOMINAL SUPPLY +/-35V - +/-60V
Number Revision
AGND
AGND
BOARD REVISION 3.0
26-Mar-2002 C:\WINDOWS\..\3560R301.SCH 4 Sheet of Drawn By:
SCH REV. 3.01
1
2
3
C:\WINDOWS\DESKTOP\LAYOUT~1\TA3020\REV3_0\3560R301.BOM 10:44:13 26-Mar-2002
Bill of Material for C:\WINDOWS\DESKTOP\LAYOUT~1\TA3020\REV3_0\3560R301.Sch Used ==== 4 10 2 6 2 4 1 2 2 4 1 5 2 4 2 2 2 1 1 2 2 2 1 2 3 2 4 8 1 2 2 1 1 1 1 2 1 8 4 4 1 4 4 Designator ==================== R115 R116 R215 R216 C1 C102 C111 C112 C202 C211 C212 C3 C4 C5 0.1uF/100V C109 C209 0.1uF/250V C105 C106 C110 C205 C206 C210 0.22uF/100V C108 C208 1.07K, 1% R107 R110 R207 R210 1.18M, 1% R5 10K POT R104 R204 11uH L100 L200 13.3K, 1% R106 R109 R206 R209 150pF C107 1K, 1% R105 R108 R205 R208 R3 2.2uF C100 C200 20K,1% R101 R111 R201 R211 20OHM/5W R117 R217 220pF C103 C203 240 OHM, 5% R112 R212 270pF C207 2K, 5% R2 330uF/63V C6 C7 33pF C101 C201 33uF/160V C113 C213 392K, 1% R4 422K, 1% R6 R7 47uF/25V C104 C204 C8 49.9K,1% R100 R200 5.6OHM/1W R113 R114 R213 R214 510K, 5% R102 R103 R118 R119 R202 R203 R218 R219 8.25K, 1% R1 CON2 J101 J201 CON2INPT J100 J200 CON2LPWR J1 CON4 J5 FBEAD L1 HDR2 J4 HDR3 J2 J3 LED D1 MUR120 D104 D105 D106 D107 D204 D205 D206 D207 MURS120T3 D102 D103 D202 D203 STW34NB20 M100 M101 M200 M201 TA3020 I1 WIRE R120 R121 R220 R221 ALUMINUM OXIDE ISOLATING WASHER Part Type =========== 0.01OHM/2W 0.1uF Footprint =========== RLVR1RG2 0805 C0U1MF10 C0U1MF10 C0U22MF10 0805 0805 POTSTURN T106 0805 0805 0805 C10UEL05 0805 R33R3W 0805 0805 0805 0805 C100UEL06 0805 C100UEL06 0805 0805 C10UEL05 0805 RES1WFLT 0805 0805 PWR2 CON2 CON2B PWR4 2512 GJMPR001 GJMP3001 LED1 DIODE60 SMB TO3P&220RGT DIP48 RES1WFLT Part Field 1 ===================== OHMITE 20% TOL. PANASONIC PANASONIC PANASONIC * * BOURNS COIL WINDING SPEC * NPO 5% * PANASONIC * XICON NPO 5% * NPO 5% PANASONIC NPO 5% PANASONIC * * PANASONIC * PANASONIC * * WALDOM WALDOM WALDOM WALDOM * * * RED LED MOTOROLA MOTOROLA ST MICROELECTRONICS TRIPATH 22AWG SOLID CORE WIRE AAVID THERMALLOY Part Field 2 ============ 12FR010 * ECH-S1104JZ ECQ-E2104KF ECH-S1224JZ * * 3306P-1-103 T106-2 CORE * * * ECA-1HHG2R2 * ERG-2SJ330 * * * EEU-FC1J331 * EEU-EB2C330 * * ECA-1EHG470 * ERG-1SJ5R6 * * 26-60-4020 705-43-0001 22-23-2021 26-60-4040 * * * * MUR120 MURS120T3 * * 4170 Part Field 3 =============== DK 12FR010-ND * DK PS1104J-ND DK EF2104-ND DK PS1224J-ND * * DK 3306P-103-ND 29TURNS / 16AWG * * * DK P5564-ND * MSR 280-PRM5-20 * * * DK P10349-ND * DK P5901-ND * * DK P5539-ND * P5.6W-1BK-ND * * DK DK DK DK * * * * * * * * WM4620-ND WM4800-ND WM4200-ND WM4622-ND

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