Texas Instruments TAS3251 User Manual

ADVANCE INFORMATION

User's Guide

SLAU757–January 2018

TAS3251 Evaluation Module

This user's guide describes the characteristics, operation, and use of the TAS3251 evaluation module. A
complete printed-circuit board (PCB) description, schematic diagram, and bill of materials (BOM) are also
included. For questions and support go to the E2E forums (e2e.ti.com).

The main contents of this document are:

• Hardware descriptions and implementation

• Design information
Related documents:

• TPA3245 115-W Stereo, 230-W Mono PurePath™ Ultra-HD Analog-Input Class-D Amplifier data sheet

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TAS3251 Evaluation Module

1

TAS32xx

PWM A

PWM B

PWM C

PWM D

I2S Input

MCLK

BCLK

LRCLK

Data

Copyright © 2017, Texas Instruments Incorporated

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Quick Start (BTL Mode)

1 Quick Start (BTL Mode)..................................................................................................... 2

2 Schematic and Bill of Materials ............................................................................................ 6

1 Output Configuration BTL .................................................................................................. 2

2 EVM Board (Top Side)...................................................................................................... 3

3 EVM Board (Bottom Side) .................................................................................................. 4

4 TAS3251EVM Schematics (1 of 6)........................................................................................ 6

5 TAS3251EVM Schematics (2 of 6)........................................................................................ 7

6 TAS3251EVM Schematics (3 of 6)........................................................................................ 8

7 TAS3251EVM Schematics (4 of 6)........................................................................................ 9

8 TAS3251EVM Schematics (5 of 6) ...................................................................................... 10

9 TAS3251EVM Schematics (6 of 6) ...................................................................................... 11

1 Jumper and Switch Configurations (USB BTL Mode) .................................................................. 4

2 TAS3251EVM Bill of Materials ........................................................................................... 12

Trademarks

PurePath is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

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Contents

List of Figures

List of Tables

1 Quick Start (BTL Mode)

Figure 1 shows the output configuration BTL.

1.1 Required Hardware

The following is required for this EVM configuration:

• TAS3251EVM

• Power supply 5–17 A, 15–36 V

• Two cables for for power supply connection

• Two 3–8 Ω speakers or resistor loads (ensure speaker or load is appropriately sized for required
wattage output)

• Four cables for banana or terminal to speaker or load connection

• USB micro cable

• PC with PurePath™ Console 3 (PPC3) and audio track

Figure 1. Output Configuration BTL

2

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1.2 Connections and Board Configuration (USB BTL Mode)

Figure 2 and Figure 3 illustrate the top and bottom EVM boards.

Quick Start (BTL Mode)

Figure 2. EVM Board (Top Side)

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Quick Start (BTL Mode)

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Figure 3. EVM Board (Bottom Side)

Use the following when connecting and configuring the board for 48-kHz USB BTL mode:

1. Ensure the power supply is OFF. Connect the power supply positive terminal to J24 PVDD (red) and
negative to J1 GND (black).

2. Connect the left channel speaker or power resistor load (3–8 Ω) to the TAS3251EVM OUTA terminal
(J10 OUTA (red)) and the other side of the speaker or resistor load to the TPA3251EVM OUTB
terminal (J10 OUTB (black)).

3. Connect the right channel speaker or power resistor load (3–8 Ω) to the TAS3251EVM OUTA terminal
(J15 OUTA (red)) and the other side of the speaker or resistor load to the TPA3251EVM OUTB
terminal (J15 OUTB (black)).

4. Check to make sure that the power supply is connected to J24 only, and the speakers or resistor loads
are connected to J10 or J15 only, as their colors are the same.

5. Connect USB cable from the PC to the TAS3251EVM.

6. Ensure that DAC MUTE S1 and AMP RESET S3 are in the lower positions of MUTE and RESET.

7. Check Table 1 for all jumper and switch configurations.

Table 1. Jumper and Switch Configurations (USB BTL Mode)

Jumper Description Configuration for BTL

J16 HS-EN USB high-speed enable Do not care
J33 XMOS DISABLE Remove

J2 Frequency select Remove

J30 Data select for J9 Do not care

J1 MCLK-SEL Install
J3 MCLK 1-2
J4 SCLK 1-2

4

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Quick Start (BTL Mode)

Table 1. Jumper and Switch Configurations (USB BTL Mode) (continued)

Jumper Description Configuration for BTL

J5 LRCLK 1-2

J7 SDIN 1-2
J37 I2S source select Install
J31 PBTL INC Remove
J32 PBTL IND Remove
J14 MODE Install
J19 ADR Install
J22 PWM switching frequency 3-4
J35 SLAVE ENABLE Remove
J11 JTAG power Do not care
J26 PVDD Install
J29 3.3V Install
J27 12V Install
J20 GVDD Install

J8 5-V select 1-2

S1 DAC MUTE MUTE
S3 AMP RESET RESET

1.3 Power Up

Ensure that the required connections and configurations have been checked. The TAS3251EVM board
can now be powered on.

1. Enable the power supply at 15 V to 36 V and ensure that D13 and D14 illuminates. LEDs D9 and D10
should not be illuminated.

2. Bring the DAC out of MUTE by switching DAC MUTE (S1) to NORMAL.

3. Bring the Power Stage out of RESET by switching AMP RESET (S3) to the high position. You should
see the FAULT LED (D10) blink once quickly, then remain unilluminated.

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TAS3251 Evaluation Module

5

GND

47.0k

R157

3.3V

1A

1

GND

2

2A32Y

4

VCC

5

1Y

6

U29

SN74LVC2G07DSFR

3.3V

VDDIOL

6

VDD

11

VDDIOL

14

VDD

16

VDD

17

VDDIOL

19

VDD

24

VDDIOL

29

VDD

36

VDD

41

VDDIOL

42

VDDIOR

52

VDD

56

VDD

60

NC

65

VDDIOR

67

VDD

73

VDDIOR

78

VDD

80

VDD

81

VDDIOR

83

VDD

87

VDDIOR

92

VDD

101

VDD

102

PLL_AVDD

103

PLL_AGND

104

OTP_VCC

105

VDDIOT

110

VDDIOT

111

VDD

120

USB_VDD33

44

USB_VDD

49

NC

50

VDD

126

PAD

129

XEF216-512-TQ128-C20

U2E

3.3V 1.0V

3.3V

1.0V

GND

4.75

R140

0.1µF

C82

GND

X0D36

3

X0D37

4

X0D38

5

X0D39

7

X0D40

8

X0D41

9

X0D42

10

X0D43

12

X0D01

27

X0D10

28

X0D00

30

X0D04

31

X0D11

32

X0D05

33

X0D06

34

X0D07

35

X0D02

37

X0D03

38

X0D08

39

X0D09

40

X0D14

57

X0D15

58

X0D20

59

X0D21

61

X0D12

62

X0D13

63

X0D22

64

X0D23

66

X0D16

68

X0D17

69

X0D18

70

X0D19

71

X0D24

88

X0D25

89

X0D34

90

X0D35

91

X0D26

93

X0D27

94

X0D32

95

X0D28

96

X0D33

97

X0D29

98

X0D30

99

X0D31

100

XEF216-512-TQ128-C20

U2A

1.00k

R110

3.3V

GND

3.3V

GND

3.3V

10.0k

R144

3.3V

GND

X-HS-EN

L2

USB_D_P

USB_D_M

USB_ID

GND

X1D35

13

X1D36

15

X1D37

18

X1D38

20

X1D18

25

X1D19

26

X1D14

51

X1D15

53

X1D20

54

X1D21

55

X1D02

72

X1D03

74

X1D04

75

X1D05

76

X1D06

77

X1D07

79

X1D08

82

X1D09

84

X1D00

85

X1D01

86

X1D41

107

X1D42

108

X1D43

109

X1D40

106

X1D26

112

X1D27

113

X1D28

114

X1D29

115

X1D30

116

X1D31

117

X1D32

118

X1D33

119

X1D39

21

X1D16

22

X1D17

23

X1D10

121

X1D11

122

U2B

XEF216-512-TQ128-C20

EN1PG

2

FB

3

VOS

4

GND

5

SW

6

VIN

7

U1

TPS62085RLTR

22µF

C125

470nH

L1

40.2k

R1

162k

R3

1.00M

R2

5V to 1V BUCK

0.1µF

C126

22µF

C124

1.0V

GND

GND

GND

GND GND

XIN/CLK

1

S0

2

VDD

3

VCTRL

4

GND

5

VDDOUT

6

VDDOUT

7

Y3

8

Y2

9

GND

10

Y1

11

SCL/S2

12

SDA/S1

13

XOUT

14

U26

CDCE913PWR

GND

3.3V

VCCA

1

A1

2

A2

3

GND

5

B2

6

B1

7

OE

4

VCCB

8

U6

SN74AVC2T244DQMR

GND GND

3.3V 1.8V

ENABLE

1

GND

2

SENSE

3

SENSE_OUT

4

CT

5

VCC

6

U30

TPS3897ADRYR

3.3V

25.5k

R156

1.0V

51.0k

R158

10.0k

R155

3.3V

470pF

C150

GND

GND

GND

10.0k

R149

10.0k

R150

X-24M

X-MCLK

3.3V

Blue

D1
USB RDY

560

R141

2.2µF

C142

GND

GND GND

X-MCLK

47.0k

R136

3.3V 3.3V

3.3V

USB I/O

USB_ID

43

USB_VBUS

45

USB_DP

46

USB_DM

47

USB_RTUNE

48

XEF216-512-TQ128-C20

U2C

43.2

R148

0.1µF

C141

GND

GND

10.0k

R145

X-TCK
X-TMS

X-TDO

X-TDI

X-TRSTN

X-RSTN

TRST

123

RST

124

CLK

125

TMS

127

TCK

128

TDO

1

TDI

2

XEF216-512-TQ128-C20

U2D

X-24M

X-TCK
X-TMS

X-TDO

X-TDI

X-RSTN

TRST

XMOS AND I/Os

0

R147

VDD

4

OE/STANDBY1GND

2

OUT

3

24

MHz

Y1

3.3V

GND

10.0k

R154

JTAG

CLOCK GENERATION

33.2

R153

33.2R146

33.2

R151

33.2

R152

GND

0.1µF
16V

C148

3.3V

GND

0.1µF
16V

C149

3.3V

GND

3.3V

GND

3.3V

GND

3.3V

X-SCL

X-SDA

33.2R143

33.2

R142

1
2
3
4
5
6

J17

JTAG

GND

X-TDI

X-TMS

X-TCK

X-TDO
X-TRSTN

VBUS-XMOS

X-SCL
X-SDA

BCLK-USB

LRCLK-USB

SDOUT-USB

3.3V

BCLK-USB

5V

4.99k

R124

4.99k

R133

3.3V 3.3V

SDOUT-USB

BCLK-USB

LRCLK-USB

I2S

USB-SPDIF

0R134

0

R135

X-MCLK

X-SCL

X-SDA

GND

I2C

SDA

SCL

GND

3.3V

SDA_B

1

GND

2

VCCA

3

SDA_A

4

SCL_A

5

OE

6

VCCB

7

SCL_B

8

U3

TCA9406DCUR

I2C-BUF-EN

I2C BUF CTRL

I2C-BUF-EN

0.1µF
16V

C17

0.1µF
16V

C27

0.1µF
16V

C37

0.1µF
16V

C40

0.1µF
16V

C45

0.1µF
16V

C54

0.1µF
16V

C58

0.1µF
16V

C74

0.1µF
16V

C80

0.1µF
16V

C99

0.1µF
16V

C100

0.1µF
16V

C101

0.1µF
16V

C102

5V-USB

5V-USB

5V-USB

5V-USB

0.1µF
16V

C143

0.1µF
16V

C144

0.1µF
16V

C145

0.1µF
16V

C146

0.1µF
16V

C147

1.8V

1.8V 1.8V

VBUS

1

D-

2

D+

3

ID

4

GND

5

678

9

J18
USB

J16

HS-EN

GND

XMOS-ENABLE

XMOS-ENABLE

0

R159

3.3V

RESET-AMP
DAC_MUTE

FAULT
CLIP_OTW

0R160
0R161

0R162
0R163

47.0k

R137

47.0k

R138

47.0k

R139

XIN-CLK

0

R63

0

R164

3.3V

0

R167

1.0V

GND

0.1µF
16V

C127

0.1µF
16V

C128

0.1µF
16V

C129

0.1µF
16V

C130

0.1µF
16V

C131

0.1µF
16V

C132

0.1µF
16V

C133

0.1µF
16V

C134

0.1µF
16V

C135

0.1µF
16V

C136

0.1µF
16V

C137

0.1µF
16V

C138

0.1µF
16V

C139

0.1µF
16V

C140

GND

-USB

J33

10.0k

R80

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Schematic and Bill of Materials

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2 Schematic and Bill of Materials

This section includes the TAS3251EVM schematics and the TAS3251EVM BOM.

2.1 Schematic

Figure 4 to Figure 9 display the EVM schematics.

6

TAS3251 Evaluation Module

Figure 4. TAS3251EVM Schematics (1 of 6)

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Q4

2.00k

R52

ADR

DUT

0R62

CLIP_OTW

FAULT

DUT

MODE

Blue

D8

USB

Q8

2.00k

R105

Blue

D15

OPTICAL

Q9

GND

2.00k

R107

Q10

GND

2.00k

R109

MUTE-LED

P2-LED

P1-LED

P0-LED

I2S MUX CONTROL

MUX_CTRL

MUX-CTRL_MCU

0

R111

ADR-MCU

GND

S4 MUTE

S5 VOL UP

S6 VOL DN

S7 PROGRAM SEL

S8 LOAD

S10 INPUT

470pF

C53

470pF

C51

470pF

C50

470pF

C49

470pF

C48

470pF

C57

25.5k

R38

25.5k

R39

25.5k

R40

25.5k

R42

25.5k

R44

25.5k

R45

AVCC

14

AVSS

13

DVCC

38

DVCC

39

DVSS

1

DVSS

4

P1.0/TA0CLK/ADC10CLK

29

P1.1/TA0.0

30

P1.2/TA0.1

31

P1.3/TA0.2

32

P1.4/SMCLK/TCK

33

P1.5/TA0.0/TMS

34

P1.6/TA0.1/TDI

35

P1.7/TA0.2/TDO/TDI

36

P2.0/TA1CLK/ACLK/A0

6

P2.1/TA0INCLK/SMCLK/A1

7

P2.2/TA0.0/A2

8

P2.3/TA0.1/A3/VREF-/VEREF-

27

P2.4/TA0.2/A4/VREF+/VEREF+

28

P2.5/TA1.0/ROSC

40

P3.0/UCB0STE/UCA0CLK/A5

9

P3.1/UCB0SIMO/UCB0SDA

10

P3.2/UCB0SOMI/UCB0SCL

11

P3.3/UCB0CLK/UCA0STE

12

P3.4/UCA0TXD/UCA0SIMO

23

P3.5/UCA0RXD/UCA0SOMI

24

P3.6/TA1.1/A6

25

P3.7/TA1.2/A7

26

P4.0/TB0.0/CA0

15

P4.1/TB0.1/CA1

16

P4.2/TB0.2/CA2

17

P4.3/TB0.0/A12/CA3

18

P4.4/TB0.1/A13/CA4

19

P4.5/TB0.2/A14/CA5

20

P4.6/TB0OUTH/A15/CA6

21

P4.7/TB0CLK/CA7

22

PAD

41

RST/NMI/SBWTDIO

5

TEST/SBWTCK

37

XIN/P2.6

3

XOUT/P2.7

2

U12

MSP430G2955IRHA40R

SBWTDIO

SBWTCK

GND

3.3V

GND

0.1µF

C56

GND

1µF

C55

0.1µF

C109

GND

I2C

SDA

0

R55 SDA-MCU

SCL

0

R54 SCL-MCU

MODE

0

R103

0

R104

SW-LOAD

SW-PROGSEL

SW-VOLDN

SW-VOLUP

SW-MUTE

SW-INPUT

SW-MUTE
SW-VOLUP

SW-LOAD

SW-PROGSEL

SW-VOLDN

3.3V

Blue

D16

COAX

3.3V

3.3V

GND

3.3V

USB-LED

OPTICAL-LED

COAX-LED

USB-LED
OPTICAL-LED
COAX-LED

GND

3.3V

GND

3.3V

Blue

D6

P1

Blue

D5

P2

560

R47

Q3

2.00k

R51

Red

D4

MUTE

Q2

2.00k

R50

Blue

D7

P0

Q5

2.00k

R53

GND

3.3V

GND

3.3V

I2S BUFFERS

SLAVE-EN

I2S-BUF-EN

J35

SLAVE ENABLE

0

R113

GND

10.0k

R114

3.3V

CLIP_OTW

FAULT

J2

FREQ SEL

GND

FREQ SELECT

FREQ-SEL

OUT = 24.576MHz

IN = 22.5792MHz

FREQUENCY

SELECT

SLAVE
ENABLE

OUT = NORMAL MODE
IN = SLAVE MODE

12345

6

J36 JTAG-RA

GND

J37

I2S SELECT

GND

I2S SELECT

OUT = AIB I2S
IN = SRC I2S

10.0k

R5

3.3V

FREQ-SEL

3.3V

AIB

3.30k

R60

GND

PVDD

100k

R32

GND

8.06k

R56

1µF
100V

C46

1µF
100V

C97

0.1uF

C64

GND

0.1uF

C96

GND

VDD-RST

GND

RESET-AMP

GND

1

GND

2

MR

5

RESET

3

VDD

4

U5

TPS3802K33DCKR

VDD-RST

GND

6

4

5

13

S3

AMP RESET

GND

GND

6

4

5

13

S1

DAC MUTE

GND

RST-AIB

P2-LED

P1-LED

P0-LED

MUTE-LED

GND

3.3V

49.9R43

47.0k

R41

3.3V

SPI BI-WIRE JTAG

VCC TOOL

TDIO

TCK

GND

J11

JTAG POWER

SBWTDIO

TCK

1

2

3

4

5

6

J12

JTAG

2200pF

C52

GND

SBWTCK
SBWTDIO

GPIO_AIB-1

GPIO_AIB-2

SW-INPUT

MUTE-AIB

DAC_MUTE

10.0k

R92

3.3V

DAC_MUTE

RST-AIB

MUTE-AIB

GPIO_AIB-1
GPIO_AIB-2

RST-AMP

TO DUT

560

R46

560

R48

560

R49

560

R106

560

R108

560

R57

0.1µF

C151

GND

GVDD

10.0k

R129

3.3V

A0-SRC

I2C BUFFERS

I2C-BUF-EN

0

R112

0R10

SRC4392

MCLK-SEL

MCLK SELECT

MCLK-SEL

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Figure 5. TAS3251EVM Schematics (2 of 6)

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Schematic and Bill of Materials

TAS3251 Evaluation Module

7