Texas Instruments TPA032D02EVM, TPA032D02DCAR, TPA032D02DCA Datasheet

TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Extremely Efficient Class-D Stereo
Operation

D

Drives L and R Channels

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

Thermally-Enhanced PowerP AD Surface­Mount Packaging

D

Thermal and Under-Voltage Protection

description

The TPA032D02 is a monolithic power IC stereo
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 TPA032D02 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. 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 A032D02 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 TPA032D02 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
AGND

LINN
LINP

LCOMP

AGND

V

DD

LPV

DD

LOUTP
LOUTP

PGND

PGND
LOUTN
LOUTN

LPV

DD

VCCREG

NC
NC

AGND

PV

DD

VCP

NC

CP1

COSC
AGND
AGND
RINN
RINP
RCOMP
FAULT0
FAULT1
RPV

DD

ROUTP
ROUTP
PGND
PGND
ROUTN
ROUTN
RPV

DD

V

CC

NC
NC
V2P5
PV

DD

PGND
NC
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)

TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

Template Release Date: 7–11–94

2

POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•

_

+

_

+

LINP

RAMP

GENERATOR

_

+

_

+

GATE

DRIVE

LPV

DD

GATE

DRIVE

LPV

DD

GATE

DRIVE

RPV

DD

GATE

DRIVE

RPV

DD

THERMAL

DETECT

VCP-UVLO

DETECT

DOUBLER

CHARGE PUMP

CONTROL and

STARTUP

LOGIC

5-V

REGULATOR

and BIASES

V

CC

PV

DD

LINN

LCOMP

COSC

RCOMP

RINP
RINN

RPV

DD

AGND

LPV

DD

ROUTP

ROUTN

PV

DD

VCP

CP2

CP1

LOUTP

LOUTN

FAULT0

FAULT1

SHUTDOWN

MUTE

VCCREG

V2P5

LPV

DD

RPV

DD

PGND

VCP PV

DD

VCP PV

DD

VCP PV

DD

VCP PV

DD

V

DD

V

DD

10 kΩ 10 kΩ

1.5 V

10 kΩ 10 kΩ

1.5 V

NOTE A: LPVDD, RPVDD, and PVDD are externally connected. AGND and PGND are externally connected.

schematic

TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

DESCRIPTION

AGND 3, 7, 20,

46, 47

Analog ground for Class-D analog circuitry

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.
LCOMP 6 Compensation capacitor terminal for left-channel Class-D amplifier
LINN 4 Class-D left-channel negative input
LINP 5 Class-D left-channel positive input
LOUTN 14, 15 Class-D amplifier left-channel negative output of H-bridge
LOUTP 10, 11 Class-D amplifier left-channel positive output of H-bridge
LPV

DD

9, 16 Class-D amplifier left-channel power supply

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 18, 19,

23, 26,

30, 31

No connection

PGND 12, 13 Power ground for left-channel H–bridge only
PGND 27 Power ground for charge pump only
PGND 36, 37 Power ground for right-channel H-bridge only
PV

DD

21, 28 VDD supply for charge-pump and gate drive circuitry
RCOMP 43 Compensation capacitor terminal for right-channel Class-D amplifier
RINN 45 Class-D right-channel negative input
RINP 44 Class-D right-channel positive input
RPV

DD

33, 40 Class-D amplifier right-channel power supply
ROUTN 34, 35 Class-D amplifier right-channel negative output of H-bridge
ROUTP 38, 39 Class-D amplifier right-channel positive output of H-bridge

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.

V

CC

32 5V supply to logic. This terminal is typically connected to VCCREG.
VCCREG 17 5-V regulator output. This terminal requires a 1-µF capacitor to ground for stability reasons.
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.

TPA032D02
10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – 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.

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

TSSOP

†

(DCA)

–40°C to 125°C TPA032D02DCA

†

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.,
TPA032D02DCAR).

TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – 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, LPVDD, RPVDD) 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Logic supply voltage, (VCC) 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 V

CC

REG output current, IO (VCCREG) 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, PVDD, LPVDD, RPV

DD

8 14 V

Logic supply voltage, V

CC

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

RMS

PWM frequency 100 250 500 kHZ

TPA032D02
10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics Class-D amplifier, VDD = PVDD = LPVDD = RPVDD = 12 V , RL = 4 Ω to 8 Ω,
T

A

= 25°C, See Figure 1 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Power supply rejection ratio VDD = PVDD = xPVDD = 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 = LPVDD = RPVDD = 12 V, RL = 4 Ω,
T

A

= 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%, per channel,
Device soldered on PCB,
See Note 2

10 W

Efficiency

PO = 10 W,
f = 1 kHz

77%

A

V

Gain 25 dB
Left/right channel gain matching 92% 95%
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

TPA032D02

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS243A – DECEMBER 1999 – REVISED MARCH 2000

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

operating characteristics, Class-D amplifier, VDD = PVDD = LPVDD = RPVDD = 12 V, RL = 8 Ω,
T

A

= 25°C, See Figure 2 (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power,

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

7.5 W

Efficiency

PO = 7.5 W,
f = 1 kHz

85%

A

V

Gain 25 dB
Left/right channel gain matching 92% 95%
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

operating characteristics, VCC 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