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RB-TA0105A-1 RB-TA0105A-2
CLASS-T DIGITAL AUDIO AMPLIFIER REFERENCE BOARD USING DIGITAL POWER PROCESSING (DPP T M ) TECHNOLOGY
Technical Information Rev. 0.75 September 2002
GENERAL DESCRIPTION
The RB-TA0105A reference board is based on the TA0105A 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 TA0105A amplifier. Note: There are two versions of the RB-TA0105A, depending on nominal supply voltage. RB-TA0105A-1 - "LV" Version - Nominal supply voltage +/-60V to +/-93V RB-TA0105A-2 - "HV" Version - Nominal supply voltage +/-125V to +/-185V
FEATURES BENEFITS
RB-TA0105A-1: 2 x 400W continuous output power @ 0.1% THD+N, 4, +90V RB-TA0105A-1: 1000W continuous output power @ 0.1% THD+N, bridged 4, +75V RB-TA0105A-2: 2 x 325W continuous output power @ 0.1% THD+N, 25, +148V RB-TA0105A-2: 2 x 400W continuous output power @ 0.1% THD+N, 12.5, +125V Outputs short circuit protected
Quick and easy evaluation of the TA0105A in multiple applications Uses only N-channel power MOSFETs Ready to use in many applications: 2 channel stereo systems 70V and 100V systems Powered Subwoofers
Note: RB-TA0105A-2 shown
1 RB-TA0105A-1, RB-TA0105A-2 - KL/Rev. 0.75, 09/02
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OPERATING INSTRUCTIONS
Power Supply Description
There are four external power supplies required to operate this board: VPP, VNN, V12 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 TA0105A amplifier also requires a supply, VN12, that is 12V more positive than VNN and tracks VNN. This VN12 power supply should be a regulated, positive 12V supply. Output and power supply connections are supplied using cable harnesses (not shown in picture). Though not required, the following powering-up sequence is usually adhered to during bench evaluations: 1st) V5 and V10 2nd) VNN and 3rd) VPP. Please refer to the Turn-on/off Pop section for additional discussion on power supply sequencing 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-TA0105A.
VPP (yellow) V5 (red) VS 5V
AGND (black) PGND (blue) VS 12V VNN (orange) VN12 (green)
Figure 1 Note: To avoid signal degradation, AGND (Analog Ground) and PGND (Power Ground) should be kept separate at the power supply. They are connected internally on the TA0105A module.
Connector J5 (Yellow) J5 (Blue) J5 (Orange) J5 (Green) J2 (Red) J2 (Black) Power Supply VPP PGND VNN VN12 V5 AGND
Table 1
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Input Connections
Audio input to the board is located at IN1 (J100) and CH2 IN2 (J200) (see Figures 2 and 3). The input can be a test signal or music source. The connectors are standard RCA types.
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 TA0105A 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 Red White Table 2 Ground Blue Blue
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 turnon, 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 TA0105A chipset if either the V5 or VN10 collapse before VPP or VNN, assuming the mute is asserted before the supplies start to discharge.
RB-TA0105A Board
VN12 VNN VPP
+ VN12 VNN PGND VPP
+ -
+ M101
GND OUT2
SN HV
LV BBM0 BBM1 Ch 1 Offset Ch 2 Offset
IN1
M100
Tripath TA0105A
Audio Source IN2 AGND
M201 AGND V5
REV 4.0
OUT1 M200 GND
Figure 3
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+ -
MUTE
5V
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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 Section
TA0105A
Output Section
Out
Figure 4 Note: The TA0105A is an inverting amplifier.
TA0105A Amplifier Gain
The TA0105A amplifier gain is the product of the input stage gain and the modulator gain. Additional information is available in the TA0105A datasheet available at www.tripath.com. AVTA0105A = AVINPUTSTAGE * AVMODULATOR
A VTA0105A -
20k (1.0k + R FB ) * 2.02 + 1 4.99k + R I 1020
For the RB-TA0105A-2 board; RI (R100, R200) = 34.8k RFBC (R106, R206) = 39.2k
AVTA0105A -
20k 40.2k * 2.02 V + 1 = - 40.52 39.79k 1020 V
Input Stage Figure 5 shows one channel of the Input Stage. The TA0105A amplifier is designed to accept unbalanced inputs. For the RB-TA0105A-1, the gain is -14.58V/V, or approximately 23.28 dB. For the RB-TA0105A-2, the gain is approximately -40.52V/V, or approximately 32.15 dB. Please note that the input stage of the TA0105A 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. In addition, the TA0105A amplifier is an inverting amplifier.
49.9K RI V5 1M 10K 0.1uF, 50V 2.2uF, 50V + CI 1M Input to TA0105A
(DC Bias ~2.5V)
Figure 5
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The value of the input capacitor, CI, 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 CI x RI ) where: CI = input capacitor value in Farads RI = input resistor value in Ohms Output offset voltages can be nulled by adjusting the 10K potentiometer shown in Figure 5. Once set, and the TA0105A reaches equilibrium, the offset does not typically drift. Offsets can typically be set to +/- 25 mV. R103 is used to adjust the offset of CH1, and R203 is used to adjust the offset of CH2. If a different TA0105A is placed in the RB-TA0105A reference board, the offset of each channel will need to be re-trimmed. RB-TA0105A Control Circuitry The MUTE pin is brought out to an external 2-pin header, J1 (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 J1 MUTE
4 8
10
R104
+5V BBM0
7
+5V
AGND
OCR1
11
R204
BBM1
C203
Figure 6 The resistors, ROCR in Figure 6 (labeled R104 and R204 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 the TA0105A-2 reference board is pre-set to 20K for a 12.5 (and above) single-ended applications. For lower impedance applications, 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. In addition, the power dissipation when driving lower impedances may become prohibitive resulting in reduced efficiency and possible FET damage. 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 (via J3) and BBM1 (via J4) settings. The stock setting for BBM is 65nS for the RB-TA0105A-1 board and 105nS for the RB-TA0105-2 board.
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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 TA0105A does not impact the performance of the amplifier.
BBM1 BBM0 DELAY
0 0 1 1
0 1 0 1
145nS 105nS 65nS 25nS
Note: The default delay jumper setting is 25nS for the RB-TA0105A-1 and 105nS for the RB-TA0105A-2.
Figure 7 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.
OCS1HN R123 0.01 C121 1.0uF C123 0.1uF OCS1HP VPP
M100 R121 HO1 D126
C120 0.1uF
+
C125
HOCOM1
L100
OUT
FDBKN1 M101 D125 R120 LO R122 0.01 C126 0.22uF C127 0.22uF R124R127
LOCOM1
VNN
C122 0.1uF OCS1LP OCS1LN
+
C124
Figure 8
The gate resistors (labeled R120 and R121 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. The output MOSFETs (M100 and M101) provide the switching function required of a Class-T design. They are driven directly by the TA0105A through the gate resistors. The devices used on the RB-TA0105A-1 board are ST STW34NB20 MOSFETs. The devices used on the RB-TA0105A-2 board are ST STW20NM50FD MOSFETs. The devices used on the RB-TA0105A-1 board are ST STW34NB20 MOSFETs. The TA0105A data sheet contains information on output FET selection as well as Tripath application note AN16,"Output Mosfet Selection Guide For Tripath Drivers." The bypass capacitors C120/C121 are critical to the reduction of ringing on the output MOSFETs. These parts are placed as closely as possible to the leads of the MOSFETs, and the leads of the capacitors themselves are as short as practical. Their values will not change with different output MOSFETs.
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The output diodes D125/D126 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 filter, L100/C126, is a second order low-pass filters that recovers 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). The OEM may benefit from some experimentation in the filter design, but the values provided in the RBTA0105A-1 reference design, 11.3uH and 0.22uF (nominal resonant frequency of 101kHz), provide excellent results for most loads between 4 and 8. The filter values used on the RB-TA0105A-2, 33uH and 0.22uF (nominal resonant frequency of 59kHz), provide excellent results loads above 12.5. As the supply voltage is increased (most applicable to the RB-TA0105A-2), the inductor value can have a significant effect on amplifier efficiency. Thus, amplifier efficiency characterization should be completed before the inductor value of 33uH is increased. 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 RB-TA0105A-1 is T106-2 and is wound with 29 turns of 16AWG wire. The core part number used on the RB-TA0105A-2 is T106-2 and is wound with 49 turns of 18AWG wire. The Zobel circuits R124-R127/C127 are there in case an amplifier is powered up with no load attached as well as terminating the amplifier with typical, "inductive" loudspeakers. 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 components, though depending on application, the power capability of the Zobel resistor may need to be increased. The components used on the reference board should be quite adequate for almost all applications. The amplifier should never be operated without a zobel filter attached. Connection Diagram for Bridge Mode Operation The amplifier is connected to the power supplies and load as shown in Figure 9. Note that an opamp 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, J100 pin 1) and the "+" terminal to the output of the non-inverted channel with respect to the input signal (Channel 2 output, J200 pin 1). The opamp inverter shown in Figure 9 is not needed if the audio generator used for testing has 2 separate outputs with a phase switch. There are tradeoffs to bridging an amplifier. For a given supply voltage, the output capability is theoretically increased by a factor of four. But this increased potential power comes at the expense of lower efficiency. Thus, the power supply voltage used for bridged operation is usually reduced such that the power dissipation in the output mosfets is not increased to a potentially damaging level. This usually results in twice the output power as compared to the single ended case.
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VN12
VNN
VPP
+ -
+ VN12 VNN PGND VPP
+ + -
M101
GND OUT2
SN HV
LV BBM0 BBM1 Ch 1 Offset Ch 2 Offset
IN1
M100
Tripath TA0105A
Audio Source IN2 AGND
M201 AGND V5
REV 4.0
OUT1 M200 GND
Figure 9 Circuit Board Layout The TA0105A 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 highfrequency 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 TA0105A and external mosfets 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 TA0105A evaluation board document, EB-TA0105A, available on the Tripath website, at www.tripath.com. The following components are important to place near either their associated TA0105A or output MOSFET pins. The recommendations are ranked in order of layout importance, either for proper device operation or performance considerations. The impedance of the output node (the connection between the top side MOSFET source to bottom side MOSFET drain) must be minimized. Reducing the parasitic trace inductance is the most effective way of limiting output node ringing. A flat, bar conductor, in parallel with the PCB output node trace, is quite effective at minimizing the inductance thereby reducing output transients due to the switching architecture. The capacitors, CHBR, provide high frequency bypassing of the amplifier power supplies and will serve to reduce spikes and modulation of the power supply rails. Please note that both mosfet half-bridges must be decoupled separately. In addition, the voltage rating for CHBR should be at least 400V as this capacitor is exposed to the full supply range, VPP-VNN. The output diodes, DO, are used to minimize overshoots/undershoots on the output node. Please note that the proper connection of these is "Drain to Drain" and "Source to Source" as shown in the Application/Test Circuit. Improper routing of these diodes will render them useless due to PCB trace inductance. The gate resistors, RG, should be located as close to the output MOSFET gates leads as possible. In addition, the trace length from the pins LOx/HOx to the gate resistor should be minimized. To reduce the loop area, a parallel trace from LOxCOM/HOxCOM should be routed directly to the respective MOSFET source lead.
RB-TA0105A-1, RB-TA0105A-2 - KL/Rev. 0.75, 09/02
-
-
-
8
+ -
MUTE
5V
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-
CFB 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 TA0105A pin as possible.
Some components are not sensitive to location but are very sensitive to layout and trace routing. The routing of the sense resistors, RS, must be Kelvin connected. This implies a direct trace from the respective TA0105A pin to the sense resistor lead without interruption. If additional connections are made to the TA0105A overcurrent sense pins or the traces, the overcurrent sense circuit may prematurely trigger. 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. Please refer to the EB-TA0105AThis was done on the EB-TA0105A for additional information. The output filter capacitor, CO, and zobel capacitor, CZ, should be star connected with the load return. The output ground feedback signal should be taken from this star point. To minimize the possibility of any noise pickup, the trace lengths of IN1 and IN2 should be kept as short as possible. This is most easily accomplished by locating the input resistors, RI as close to the TA0105A as possible. In addition, the offset trim resistor, ROFB, which connects to either IN1,or IN2, should be located close to the TA0105A input section.
-
-
TA0105A Grounding Proper grounding techniques are required to maximize TA0105A functionality and performance. Parametric parameters such as THD+N, Noise Floor and Crosstalk can be adversely affected if proper grounding techniques are not implemented on the PCB layout. The following discussion highlights some recommendations about grounding both with respect to the TA0105A as well as general "audio system" design rules. The TA0105A is divided into two sections: the input section, which spans pins 1-12 and pins 35-38 and the output (high voltage) section, which spans pins 13 through pin 34. On the TA0105A evaluation board, the ground is also divided into distinct sections, one for the input and one for the output. To minimize ground loops and keep the audio noise floor as low as possible, the input and output ground should not be externally connected. They are already connected internally via a ferrite bead between pin 1 and pin 28. Additionally, any external input circuitry such as preamps, or active filters, should be referenced to pin 1. For the power section, Tripath has traditionally used a "star" grounding scheme. Thus, the load ground returns and the power supply decoupling traces are routed separately back to the power supply. In addition, any type of shield or chassis connection would be connected directly to the ground star located at the power supply. These precautions will both minimize audible noise and enhance the crosstalk performance of the TA0105A. The TA0105A incorporates a differential feedback system to minimize the effects of ground bounce and cancel out common mode ground noise. As such, the feedback from the output ground for each channel needs to be properly sensed. This can be accomplished by connecting the output ground "sensing" trace directly to the star formed by the output ground return, output capacitor, CO, and the zobel capacitor, CZ. Refer to the Application / Test Circuit for a schematic description. Performing Measurements on the RB-TA0105A The TA0105A 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.
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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 TA0105A amplifier switching pattern will degrade the measurement. One feature of the TA0105A 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 (when they are made with wide-bandwidth measuring equipment), these same filters degrade frequency response. The RB-TA0105A 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)
Documentation
Soft copies of the schematics and layout can be provided upon request (available in Protel 2.8 format). Gerber files, with embedded apertures, are also available.
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PRELIMINARY INFORMATION This is a product in development. Tripath Technology, Inc. reserves the right to make any changes without further notice to improve reliability, function and design. Tripath and Digital Power Processing are trademarks of Tripath Technology. Other trademarks referenced in this document are owned by their respective companies. Tripath Technology, Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Tripath does not assume any liability arising out of the application of use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. TRIPATH'S PRODUCT ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN CONSENT OF THE PRESIDENT OF TRIPATH TECHONOLOGY, INC. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in this labeling, can be reasonably expected to result in significant injury of the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
2.
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
2
3
4
5
6
D221
NS M201 STW34NB20
R223 0.01OHM/2W
R221 5.6OHM/1W D
D224 NS C220 0.1UF/250V C221 1.0UF/250V
C223 0.1UF/250V
1
C225 330UF/100V D D225 MUR420 D226 MUR420 L200 11.3uH OUT 2 J201 1 2 C227 0.22uF/100V C226 0.22uF/100V D223 NS R224 33OHM/5W R225 NS R226 33OHM/5W R227 NS R222 0.01OHM/2W C222 0.1UF/250V
CPR200 CPR2PIN
EXTERNAL OV/UV SHIFT RESISTORS
VNN R1 1.21M V5 R3 3.57M R4 1.33M VPP C206 68pF
R206 18.7KOHM/0.6W D220 NS M200 STW34NB20 R220 5.6OHM/1W
R2 1.33M
C3 1000pF/50V
C4 1000pF/50V
V5
31
29
37
34
36
35
38
VHIGH
OCS2L+
OCS2H-
OCS2L-
LO2COM
FDBKN2
OCS2H+
VLOW
HMUTE
PGND
NC
J2 CON2
33
32
30
28
C2 10UF/50V
C1 0.1UF/50V 1 2
I1 LO2 HO2COM HO2 VSNEG VSPOS HO1 HO1COM 27 26 25 24 23 22 21 20 D121 NS M101 STW34NB20 R121 5.6OHM/1W D124 NS C120 0.1UF/250V C121 1.0UF/250V R123 0.01OHM/2W VNN VPP
2
C224 330UF/100V C
5V SUPPLY INPUT
C
AGND
2
1
AGND OVRLDB V5 MUTE IN2 IN1 BBM0
J1 JUMPER SHORT J1 TO ENABLE AMPLIFIER MUTE J200 RCAJACK J100 RCAJACK C200 2.2UF/50V 2 2 C100 2.2UF/50V 2 1 1 R100 49.9K R200 49.9K
V5
3 4
IN2 5 IN1 6 7 8
1
2
POWER SUPPLY INPUT J5 VN12 1 VNN 2 PGND 3 VPP 4
GND_KELVIN1
LO1COM
1 2 1 V5
3
GND_KELVIN2
BBM1
LO1
FDBKN1
OCS1H+
OCS1L+
OCS1H-
OCS1L-
OCR2
OCR1
VN12
3
C123 0.1UF/250V
1
C125 330UF/100V D125 MUR420
9
10
11
12
13
14
15
16
17
18
19
OFFSET TRIM CIRCUIT
R103 10K POT B R102 1M R101 1M IN1 C101 0.1UF/50V R105 18.7KOHM/0.6W R204 10K OHM R104 10K OHM R205 18.7KOHM/0.6W CPR100 CPR2PIN R106 D120 18.7KOHM/0.6W R203 10K POT R202 1M R201 1M IN2 C201 0.1UF/50V C106 56pF R120 5.6OHM/1W NS M100 STW34NB20 D123 NS D126 MUR420
2
B
V5
1
L100 11.3uH
2 C127 0.22uF/100V
OUT 1 J101
C126 0.22uF/100V
R124 33OHM/5W
R125 NS
R126 33OHM/5W
R127 NS
R122 0.01OHM/2W VSNEG C124 330UF/100V
C122 0.1UF/250V
A
1
2
A
Title Size C Date: File: 1 2 3 4 5
RB-TA0105A - 1 SCHEMATIC (LV VERSION)
Number 9-Sep-2002 C:\WINDOWS\..\RB0105_1.SCH Sheet of Drawn By: 6 Revision
4.0
C:\WINDOWS\DESKTOP\LAYOUTS\TA0105~2\TA0105R4\RB0105_1.BOM 15:29:47 9-Sep-2002
Bill of Material for C:\WINDOWS\DESKTOP\LAYOUTS\TA0105~2\TA0105R4\RB0105_1.Sch Used ==== 4 6 3 4 2 1 2 2 2 2 1 2 1 4 4 2 1 4 4 2 4 1 1 1 1 2 1 2 4 12 2 2 4 Part Type ============= 0.01OHM/2W 0.1UF/250V Designator ==================== R122 R123 R222 R223 C120 C122 C123 C220 C222 C223 0.1UF/50V C1 C101 C201 0.22uF/100V C126 C127 C226 C227 1.0UF/250V C121 C221 1.21M R1 1.33M R2 R4 1000pF/50V C3 C4 10K OHM R104 R204 10K POT R103 R203 10UF/50V C2 11.3uH L100 L200 150W_DRVR I1 18.7KOHM/0.6W R105 R106 R205 R206 1M R101 R102 R201 R202 2.2UF/50V C100 C200 3.57M R3 330UF/100V C124 C125 C224 C225 33OHM/5W R124 R126 R224 R226 49.9K R100 R200 5.6OHM/1W R120 R121 R220 R221 56pF C106 68pF C206 CON2 J2 CON4 J5 CPR2PIN CPR100 CPR200 JUMPER J1 JUMPER3 J3 J4 MUR420 D125 D126 D225 D226 NS D120 D121 D123 D124 D220 D221 D223 D224 R125 R127 R225 R227 PWR2 J101 J201 RCAJACK J100 J200 STW34NB20 M100 M101 M200 M201 Footprint ========== PWRR052W C0U1MF10 C0U1MF05 C0U1MF10 C100UEL06 0805 0805 0805 RES50 POTSTURN C10UEL05 IND130 150W_DRVR RES1W RES50 C10UEL05 0805 C100UEL06 R33R3W RES50 2512 0805 0805 CON2 PWR4 GJMPR001 GJMP3001 267_03 R33R3W PWR2 CON2 TO3P Part Field 1 ======================== OHMITE PANASONIC Part Field 2 ============== 12FR010 ECQ-E2104KF Part Field 3 ==================== DK 12FR010-ND DK EF2104-ND
PANASONIC ECQ-V1H104JL DK P4525-ND PANASONIC ECH-S1224JZ DK PS1224J-ND PANASONIC ECQ-E2105KF DK EF2105-ND 1/8W, 1% * * 1/8W, 1% * * 10% NPO * * 1/8W, 1% * * PANASONIC 3306P-1-103 DK 3306P-103-ND PANASONIC ECA-1HHG100 DK P5567-ND AMIDON INDUCTIVE T106-2 CORE 29 turns, 16awg wire TRIPATH TECHNOLOGY, INC. * * BC Components B0207C18K70F5T DK BC18.7KZCT-ND 1/8W, 5% * * PANASONIC ECA-1HHG2R2 DK P5564-ND 1/8W, 1% * * PANASONIC EEU-FC2A331S DK P10783-ND XICON PRM5-33 MSR 280-PRM5-33 1/8W, 1% * * PANASONIC ERJ-1TYJ5R6U DK PT5.6XCT-ND 5% NPO, 50V * * 5% NPO, 50V * * WALDOM 22-23-2021 DK WM4200-ND WALDOM 26-60-4040 DK WM4622-ND * * * * * * * * * ON SEMICONDUCTOR MUR420 NWK - 08F2106 XICON PRM5-33 MSR 280-PRM5-33 WALDOM DGS PRO AUDIO ST MICROELECTRONICS 26-60-4020 * STW34NB20 DK WM4620-ND MSR 161-0390 *
1
2
3
4
5
6
D221
SS16 M201 STW20NM50FD
R223 0.01OHM/2W
R221 33OHM/1W D
D224 NS C220 0.1UF/400V C221 1.0UF/400V
C223 0.1UF/400V
1
C225 220UF/200V D D225 MUR460 D226 MUR460 L200 33uH OUT 2 J201 1 2 C227 0.22uF/250V C226 0.22uF/250V D223 NS R224 47OHM/5W R225 47OHM/5W R226 47OHM/5W R227 NS R222 0.01OHM/2W C222 0.1UF/400V
CPR200 CPR2PIN
EXTERNAL OV/UV SHIFT RESISTORS
VNN R1 NS R3 NS V5 R4 NS VPP
R206 39KOHM/1W D220 SS16 M200 STW20NM50FD R220 33OHM/1W
R2 NS
C206 47pF/50V
C3 1000pF/50V
C4 1000pF/50V
V5
31
29
37
34
36
35
38
VHIGH
OCS2L+
OCS2H-
OCS2L-
LO2COM
FDBKN2
OCS2H+
VLOW
HMUTE
PGND
NC
J2 CON2
33
32
30
28
C2 10UF/50V
C1 0.1UF/50V 1 2
I1 LO2 HO2COM HO2 VSNEG VSPOS HO1 HO1COM 27 26 25 24 23 22 21 20 D121 SS16 M101 STW20NM50FD R121 33OHM/1W D124 NS C120 0.1UF/400V C121 1.0UF/400V R123 0.01OHM/2W VNN VPP
2
C224 220UF/200V C
5V SUPPLY INPUT
C
AGND
2
1
AGND OVRLDB V5 MUTE IN2 IN1 BBM0
J1 JUMPER SHORT J1 TO ENABLE AMPLIFIER MUTE J200 RCAJACK J100 RCAJACK C200 2.2UF/50V 2 2 C100 2.2UF/50V 2 1 1 R100 34.8K R200 34.8K
V5
3 4
IN2 5 IN1 6 7 8
1
2
POWER SUPPLY INPUT J5 VN12 1 VNN 2 PGND 3 VPP 4
GND_KELVIN1
LO1COM
1 2 1 V5
3
GND_KELVIN2
BBM1
LO1
FDBKN1
OCS1H+
OCS1L+
OCS1H-
OCS1L-
OCR2
OCR1
VN12
3
C123 0.1UF/400V
1
C125 220UF/200V D125 MUR460
9
10
11
12
13
14
15
16
17
18
19
OFFSET TRIM CIRCUIT
R103 10K POT B R102 510K R101 510K IN1 C101 0.1UF/50V R105 39KOHM/1W R204 20K OHM R104 20K OHM R205 39KOHM/1W CPR100 CPR2PIN R106 D120 39KOHM/1W R203 10K POT R202 510K R201 510K IN2 C201 0.1UF/50V C106 68pF/50V R120 33OHM/1W SS16 M100 STW20NM50FD D123 NS D126 MUR460
2
B
V5
1
L100 33uH
2 C127 0.22uF/250V
OUT 1 J101
C126 0.22uF/250V
R124 47OHM/5W
R125 47OHM/5W
R126 47OHM/5W
R127 NS
R122 0.01OHM/2W VSNEG C124 220UF/200V
C122 0.1UF/400V
A
1
2
A
Title Size C Date: File: 1 2 3 4 5
RB-TA0105A-2 SCHEMATIC (HV Version)
Number 9-Sep-2002 C:\WINDOWS\..\RB0105_2.SCH Sheet of Drawn By: 6 Revision
4.0
C:\WINDOWS\DESKTOP\LAYOUTS\TA0105~2\TA0105R4\RB0105_2.BOM 15:27:03 9-Sep-2002
Bill of Material for C:\WINDOWS\DESKTOP\LAYOUTS\TA0105~2\TA0105R4\RB0105_2.Sch Used ==== 4 6 3 4 2 2 2 1 1 2 2 4 4 2 2 4 6 1 4 1 1 1 2 1 2 4 10 2 2 4 4 Designator ==================== R122 R123 R222 R223 C120 C122 C123 C220 C222 C223 0.1UF/50V C1 C101 C201 0.22uF/250V C126 C127 C226 C227 1.0UF/400V C121 C221 1000pF/50V C3 C4 10K POT R103 R203 10UF/50V C2 150W_DRVR I1 2.2UF/50V C100 C200 20K OHM R104 R204 220UF/200V C124 C125 C224 C225 33OHM/1W R120 R121 R220 R221 33uH L100 L200 34.8K R100 R200 39KOHM/1W R105 R106 R205 R206 47OHM/5W R124 R125 R126 R224 R225 R226 47pF/50V C206 510K R101 R102 R201 R202 68pF/50V C106 CON2 J2 CON4 J5 CPR2PIN CPR100 CPR200 JUMPER J1 JUMPER3 J3 J4 MUR460 D125 D126 D225 D226 NS D123 D124 D223 D224 R1 R127 R2 R227 R3 R4 PWR2 J101 J201 RCAJACK J100 J200 SS16 D120 D121 D220 D221 STW20NM50FD M100 M101 M200 M201 Part Type =========== 0.01OHM/2W 0.1UF/400V Footprint ========== PWRR052W C0U1MF10 C0U1MF05 C0U1MF10 C100UEL06 0805 POTSTURN C10UEL05 150W_DRVR C10UEL05 RES50 C100UEL06 2512 IND130 RES50 RES1W R33R3W 0805 RES50 0805 CON2 PWR4 GJMPR001 GJMP3001 267_03 SMB PWR2 CON2 SMB TO3P Part Field 1 ======================== OHMITE PANASONIC Part Field 2 ============ 12FR010 ECQ-E4104KF Part Field 3 ==================== DK 12FR010-ND DK EF4104-ND DK P4525-ND DK PF2224-ND DK EF4105-ND * DK 3306P-103-ND DK P5567-ND * DK P5564-ND * DK P5921-ND DK P33XCT-ND 49 turns, 18awg wire * DK P39KW-1BK-ND MSR 280-PRM5-47 * * * DK WM4200-ND DK WM4622-ND * * * NWK - 08F2110 * DK WM4620-ND MSR 161-0390 DK SS16GICT-ND *
PANASONIC ECQ-V1H104JL PANASONIC ECW-F2224JB PANASONIC ECQ-E4105KF 10% NPO * PANASONIC 3306P-1-103 PANASONIC ECA-1HHG100 TRIPATH TECHNOLOGY, INC. * PANASONIC ECA-1HHG2R2 1/8W, 1% * PANASONIC EEU-EB2D221 PANASONIC ERJ-1WYJ330U AMIDON INDUCTIVE T106-2 CORE 1/8W, 1% * PANASONIC ERG-1SJ393 XICON PRM5-47 5% NPO,50V 1/8W, 5% 5% NPO,50V WALDOM WALDOM * * * ON SEMICONDUCTOR ON SEMICONDUCTOR WALDOM DGS PRO AUDIO GENERAL SEMICONDUCTOR ST MICROELECTRONICS * * * 22-23-2021 26-60-4040 * * * MUR460 MURS140T3 26-60-4020 * SS16 STW20NM50FD

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