Texas Instruments TPA032D03DCAR, TPA032D03DCA Datasheet

TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Extremely Efficient Class-D Mono
Operation

D

Drives Mono Speaker, Plus Stereo
Headphones

D

10-W BTL Output Into 4 Ω From 12 V

D

32-W Peak Music Power

D

Fully Specified for 12-V Operation

D

Low Shutdown Current

D

Class-AB Headphone Amplifier

D

Thermally-Enhanced PowerP AD Surface­Mount Packaging

D

Thermal and Under-Voltage Protection

description

The TPA032D03 is a monolithic power IC mono
audio amplifier that operates in extremely efficient
Class-D operation, using the high switching speed
of power DMOS transistors to replicate the analog
input signal through high-frequency switching of
the output stage. This allows the TPA032D03 to
be configured as a bridge-tied load (BTL) amplifier
capable of delivering up to 10 W of continuous
average power into a 4-Ω load at 0.5% THD+N
from a 12-V power supply in the high-fidelity audio
frequency range (20 Hz to 20 kHz). A BTL
configuration eliminates the need for external
coupling capacitors on the output. Included is a Class-AB headphone amplifier with interface logic to select
between the two modes of operation. Only one amplifier is active at any given time, and the other is in
power-saving sleep mode. Also, a chip-level shutdown control is provided to limit total supply current to 20 µA,
making the device ideal for battery-powered applications.

The output stage is compatible with a range of power supplies from 8 V to 14 V . Protection circuitry is included
to increase device reliability: thermal and under-voltage shutdown, with a status feedback terminal for use when
any error condition is encountered.

The high switching frequency of the TP A032D03 allows the output filter to consist of three small capacitors and
two small inductors per channel. The high switching frequency also allows for good THD+N performance.

The TPA032D03 is offered in the thermally enhanced 48-pin PowerPAD TSSOP surface-mount package
(designator DCA).

Copyright  2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments Incorporated.

SHUTDOWN

MUTE

MODE

INN
INP

COMP

AGND

V

DD

PV

DD

OUTP
OUTP
PGND
PGND
OUTN
OUTN

PV

DD

HPREG

HPLOUT

HPLIN

AGND

PV

DD

VCP

HPDL

CP1

COSC
AGND
AGND
AGND
AGND
AGND
FAULT0
FAULT1
PV

DD

NC
NC
PGND
PGND
NC
NC
PV

DD

HPV

CC

HPROUT
HPRIN
V2P5
PV

DD

PGND
HPDR
CP2

NC – No internal connection

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

DCA PACKAGE

(TOP VIEW)

TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

Template Release Date: 7–11–94

2

POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•

_

+

_

+

INP

RAMP

GENERATOR

GATE

DRIVE

PV

DD

GATE

DRIVE

PV

DD

THERMAL

DETECT

VCP-UVLO

DETECT

DOUBLER

CHARGE PUMP

_

+

_

+

CONTROL and

STARTUP

LOGIC

5-V

REGULATOR

and BIASES

HPV

CC

PV

DD

INN

COMP

COSC

PV

DD

PV

DD

VCP

CP2

CP1

OUTP

OUTN

FAULT0

FAULT1

SHUTDOWN
MODE
MUTE

HPREG

V2P5

HPLIN

HPLOUT

HPV

CC

HPROUT

HPRIN

LPV

DD

PGND

VCP PV

DD

VCP PV

DD

V

DD

V

DD

10 kΩ 10 kΩ

1.5 V

HP

DEPOP

HPDL
HPDR

AGND

NOTE A: VDD and PVDD are externally connected. AGND and PGND are externally connected.

schematic

TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

DESCRIPTION

AGND 7, 20,

43, 44,

45, 46, 47

Analog ground for headphone and Class-D analog sections

COMP 6 Compensation capacitor terminal for Class-D amplifier
COSC 48 Connect a capacitor from analog ground to this terminal to set the frequency of the ramp reference signal.
CP1 24 First diode node for charge pump
CP2 25 First inverter switching node for charge pump
FAULT0 42 Logic level fault0 output signal. Lower order bit of the two fault signals with open drain output.
FAULT1 41 Logic level fault1 output signal. Higher order bit of the two fault signals with open drain output.
HPDL 23 Depop control for left headphone
HPDR 26 Depop control for right headphone
HPLIN 19 Headphone amplifier left input
HPLOUT 18 Headphone amplifier left output
HPREG 17 5-V regulator output. This terminal requires a 1-µF capacitor to ground for stability reasons.
HPRIN 30 Headphone amplifier right input
HPROUT 31 Headphone amplifier right output
HPV

CC

32 5V supply to headphone amplifier and logic. This terminal is typically connected to HPREG.
INN 4 Class-D negative input
INP 5 Class-D positive input
MODE 3 TTL logic-level mode input signal. When MODE is held low, the main Class-D amplifier is active. When MODE is

held > high, the head phone amplifier is active.

MUTE

2

Active-low TTL logic-level mute input signal. When MUTE is held low, the selected amplifier is muted. When MUTE
is held > high, the device operates normally. When the Class-D amplifier is muted, the low-side output transistors
are turned on, shorting the load to ground.

NC 34, 35,

38, 39

No connection

OUTN 14, 15 Class-D amplifier negative output of H-bridge
OUTP 10, 11 Class-D amplifier positive output of H-bridge
PGND 12, 13 Power ground for H–bridge only
PGND 27 Power ground for charge pump only
PGND 36, 37 Power ground for H-bridge only
PV

DD

9, 16, 21,

28, 33, 40

VDD supply for charge-pump, headphone regulator, Class-D amplifier , and gate drive circuitry

SHUTDOWN

1

Active-low TTL logic-level shutdown input signal. When SHUTDOWN is held low, the device goes into shutdown
mode. When SHUTDOWN

is held high, the device operates normally.
V2P5 29 2.5V internal reference bypass. This terminal requires a capacitor to ground.
VCP 22 Connect a capacitor from this terminal to power ground to provide storage for the charge pump output voltage.
V

DD

8 VDD bias supply for analog circuitry. This terminal needs to be well filtered to prevent degrading the device

performance.

TPA032D03
10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Class-D amplifier faults

Table 1. Class-D Amplifier Fault Table

FAULT 0 FAULT 1 DESCRIPTION

1 1 No fault. The device is operating normally.
0 1 Charge pump under-voltage lock-out (VCP-UV) fault. All low-side transistors are turned on, shorting the load to

ground. Once the charge pump voltage is restored, normal operation resumes, but FAUL T1 is still active. This is not
a latched fault, however. FAULT1 is cleared by cycling MUTE

, SHUTDOWN, or the power supply.

0 0 Thermal fault. All the low-side transistors are turned on, shorting the load to ground. Once the junction temperature

drops 20°C, normal operation resumes (not a latched fault). But the FAULTx terminals are still set and are cleared
by cycling MUTE

, SHUTDOWN, or the power supply.

headphone amplifier faults

The thermal fault remains active when the device is in head phone mode. This fault operation has exactly the
same as it does for the Class-D amplifier (see Table 1).

If HPVCC drops below approximately 4.5 V , the head phone is disabled. Once HPVCC exceeds approximately

4.5 V, the head phone amplifier is re-enabled. No fault is reported to the user.

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

TSSOP

†

(DCA)

–40°C to 125°C TPA032D03DCA

†

The DCA package is available in left-ended tape and reel. T o order
a taped and reeled part, add the suffix R to the part number (e.g.,
TPA032D03DCAR).

TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range, TC = 25°C (unless otherwise
noted)

†

Supply voltage, (VDD, PVDD) 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Headphone supply voltage, (HPVCC) 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage, VI (MUTE, MODE, SHUTDOWN) –0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current, I

O

(FAULT0, FAULT1), open drain terminated 1 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply/load voltage, (FAULT0, FAULT1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charge pump voltage, VCP PVDD + 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous H-bridge output current (1 H-bridge conducting) 3.5 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pulsed H-Bridge output current, each output, I

max

(see Note 1) 7 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous HPREG output current, I

O

(HPREG) 150 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation, TC = 25°C See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating virtual junction temperature range, TJ –40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating case temperature range, TC –40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: Pulse duration = 10 ms, duty cycle v 2%

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

‡

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

DCA 5.6 W 44.8 mW/°C 3.6 W 2.9 W

‡

Please see the Texas Instruments document,

PowerPAD Thermally Enhanced Package Application

Report

(literature number SLMA002), for more information on the PowerPAD package. The thermal data

was measured on a PCB layout based on the information in the section entitled

Texas Instruments

Recommended Board for PowerPAD

on page 33 of the before mentioned document.

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, VDD, PV

DD

8 14 V

Headphone supply voltage, HPV

CC

4.5 5.5 V
High-level input voltage, VIH (MUTE, MODE, SHUTDOWN) 2 VDD + 0.3 V V
Low-level input voltage, VIL (MUTE, MODE, SHUTDOWN) –0.3 0.8 V
Audio inputs, LINN, LINP, RINN, RINP, HPLIN, HPRIN, differential input voltage 1 V

RMS

PWM frequency 100 250 500 kHZ

TPA032D03
10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics Class-D amplifier, VDD = PVDD = 12 V, RL = 4 Ω to 8 Ω, TA = 25°C,
See Figure 1 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Power supply rejection ratio VDD = PVDD = 11 V to 13 V –40 dB

I

DD

Supply current No output filter connected 25 35 mA

I

DD(Mute)

Supply current, mute mode MUTE = 0 V 10 18 mA

I

DD(S/D)

Supply current, shutdown mode SHUTDOWN = 0 V 20 30 µA

|IIH| High-level input current (MUTE, MODE,

SHUTDOWN

)

VIH = 5.25 V 10 µA

|IIL| Low-level input current (MUTE, MODE,

SHUTDOWN

)

VIL = –0.3 V 10 µA

r

DS(on)

Static drain-to-source on-state resistance
(high-side + low-side FETs)

IDD = 0.5 A 720 800 mΩ

r

DS(on)

Matching, high-side to high-side, low-side to
low-side, same channel

95% 98%

operating characteristics, Class-D amplifier, VDD = PVDD = 12 V, RL = 4 Ω, TA = 25°C, See Figure 1
(unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power

f = 1 kHz,
THD = 0.5%,
Device soldered on PCB,
See Note 2

10 W

Efficiency

PO = 10 W,
f = 1 kHz

77%

A

V

Gain 25 dB
Noise floor –60 dB
Dynamic range 80 dB
Crosstalk f = 1 kHz –50 dB
Frequency response bandwidth, post output filter, –3 dB 20 20000 Hz

B

OM

Maximum output power bandwidth 20 kHz

Z

I

Input impedance 10 kΩ

NOTE 2: Output power is thermally limited, TA = 23°C

TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

operating characteristics, Class-D amplifier, VDD = PVDD = 12 V, RL = 8 Ω, TA = 25°C, See Figure 2
(unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power,

THD = 0.5%
Device soldered on PCB,
See Note 2

7.5 W

Efficiency

PO = 7.5 W,
f = 1 kHz

85%

A

V

Gain 25 dB
Noise floor –60 dB
Dynamic range 80 dB
Crosstalk f = 1 kHz –50 dB
Frequency response bandwidth, post output filter, –3 dB 20 20000 Hz

B

OM

Maximum output power bandwidth 20 kHz

Z

I

Input impedance 10 kΩ

NOTE 2: Output power is thermally limited, TA = 85°C

electrical characteristics, headphone amplifier, HPVCC = 5 V, RL = 32 Ω, TA = 25°C, See Figure 3
(unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Power supply rejection ratio –60 dB
Uncompensated gain range –1 –10 V/V

I

DD

Supply current 9 12 mA

I

DD(MUTE)

Supply current, mute mode 9 12 mA

I

DD(S/D)

Supply current, shutdown mode 20 30 µA

operating characteristics, headphone amplifier, HPVCC = 5V, RL = 32 Ω, gain set at –10V/V,
T

A

= 25°C, See Figure 3 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power

THD = 0.5%,
f = 1 kHz

50 mW

Crosstalk f = 1 kHz –60 dB
Frequency response bandwidth, post output filter, –3 dB 20 20 kHz

B

OM

Maximum output power bandwidth 20 kHz

Z

I

Input impedance >1 MΩ

operating characteristics, HPREG 5-V regulator, TA = 25°C (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

O

Output voltage

VDD = PVDD = LPVDD = RPVDD = 8 V to 14 V,
IO = 0 to 90 mA

4.5 5.5 V

I

OS

Short-circuit output current VDD = PVDD = LPVDD = RPVDD = 8 V to 14 V

†

90 mA

†

Pulse width must be limited to prevent exceeding the maximum operating virtual junction temperature of 150°C.

thermal shutdown

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Thermal shutdown temperature 165 °C
Thermal shutdown hysteresis 30 °C

TPA032D03
10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

INP

INN

COMP

V

DD

COSC

AGND

PV

DD

SHUTDOWN

HPREG

V2P5

HPLIN

HPLOUT

HPV

CC

HPROUT

HPRIN

PGND

15 µH

15 µH

0.22 µF

0.22 µF
1 µF

4 Ω

1 µF

1 µF

Balanced

Differential

Input Signal

1000 pF

1000 pF

HPDR

HPDL

CP1

CP2
VCP

FAULT0
FAULT1

MODE

MUTE

HPREG

1 µF

OUTP

OUTN

47 nF

0.1 µF

42

1
2
3

5

4

6

48

7,20,46,47

12,13,27,36,37

9, 16, 21, 28, 33, 34

19

30

32

41

14,15

10,11

29

8

18
31
17

26

23
24

25
22

12 V

HPREG

12 V

500 kΩ

100 kΩ

To

HPREG

To HPV

CC

0.1 µF

Figure 1. 12-V, 4-Ω Test Circuit