Texas Instruments TPA2000D2PWP, TPA2000D2PWPR, TPA2000D2EVM Datasheet

TPA2000D2

2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Modulation Scheme Optimized to Operate
Without a Filter

D

2 W Into 3-Ω Speakers (THD+N< 0.4%)

D

< 0.08% THD+N at 1 W, 1 kHz, Into 4-Ω Load

D

Extremely Efficient 3rd Generation 5-V
Class-D Technology:
– Low Supply Current (No Filter) ...8 mA
– Low Supply Current (Filter) ...15 mA
– Low Shutdown Current ...1 µA
– Low Noise Floor ...56 µV

RMS

– Maximum Efficiency into 3 Ω, 65 – 70%
– Maximum Efficiency into 8 Ω, 75 – 85%
– 4 Internal Gain Settings ...8 – 23.5 dB
– PSRR . . . –77 dB

D

Integrated Depop Circuitry

D

Short-Circuit Protection (Short to Battery,
Ground, and Load)

D

–40°C to 85°C Operating Temperature
Range

description

The TPA2000D2 is the third generation 5-V class-D amplifier from Texas Instruments. Improvements to
previous generation devices include: lower supply current, lower noise floor, better ef ficiency, four dif ferent gain
settings, smaller packaging, and fewer external components. The most significant advancement with this device
is its modulation scheme that allows the amplifier to operate without the output filter. Eliminating the output filter
saves the user approximately 30% in system cost and 75% in PCB area.

The TPA2000D2 is a monolithic class-D power IC stereo audio amplifier, using the high switching speed of
power MOSFET transistors. These transistors reproduce the analog signal through high-frequency switching
of the output stage. The TPA2000D2 is configured as a bridge-tied load (BTL) amplifier capable of delivering
greater than 2 W of continuous average power into a 3-Ω load at less than 1% THD+N from a 5-V power supply
in the high fidelity range (20 Hz to 20 kHz). With 1 W being delivered to a 4-Ω load at 1 kHz, the typical THD+N
is less than 0.08%.

A BTL configuration eliminates the need for external coupling capacitors on the output. Low supply current of
8 mA makes the device ideal for battery-powered applications. Protection circuitry increases device reliability:
thermal, over-current, and under-voltage shutdown.

Efficient class-D modulation enables the TPA2000D2 to operate at full power into 3-Ω loads at an ambient
temperature of 85°C.

AVAILABLE OPTIONS

PACKAGED DEVICE

T

A

TSSOP (PWP)

–40°C to 85°C TPA2000D2PWP

NOTE: The PWP package is available taped and reeled. To

order a taped and reeled part, add the suffix R to the
part number (e.g., TPA2000D2PWPR).

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.

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12

24
23
22
21
20
19
18
17
16
15
14
13

PGND

LOUTN

GAIN0

PV

DD

LINN
AGND
COSC

RINN

PV

DD

SHUTDOWN

ROUTN

PGND

PGND
LOUTP
BYPASS
PV

DD

LINP
V

DD

ROSC
RINP
PV

DD

GAIN1
ROUTP
PGND

PWP PACKAGE

(TOP VIEW)

TPA2000D2
2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

Gate
Drive

_

+

Gate
Drive

_
+

_
+

_

+

Gain

Adjust

Gain

Adjust

Start-up

Protection

Logic

OC

Detect

OC

Detect

Thermal VDD ok

Ramp

Generator

Biases

and

References

Gate
Drive

_

+

Gate
Drive

_
+

_
+

_

+

Gain

Adjust

Gain

Adjust

Gain

2

AGNDV

DD

V

DD

PV

DD

RINN

ROUTN

PGND
PV

DD

ROUTP

PGND

PV

DD

LOUTP

PGND
PV

DD

LOUTN

PGND

RINP

SHUTDOWN

GAIN1
GAIN0

COSC
ROSC

BYPASS

LINP

LINN

TPA2000D2

2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Function

TERMINAL

NAME NO.

I/O

DESCRIPTION

AGND 6 – Analog ground
BYPASS 22 I Tap to voltage divider for internal midsupply bias generator used for analog reference.

COSC 7 I

A capacitor connected to this terminal sets the oscillation frequency in conjunction with ROSC. For proper

operation, connect a 220 pF capacitor from COSC to ground.
GAIN0 3 I Bit 0 of gain control (TTL logic level)
GAIN1 15 I Bit 1 of gain control (TTL logic level)
LINN 5 I Left channel negative differential audio input
LINP 20 I Left channel positive differential audio input
LOUTN 2 O Left channel negative audio output
LOUTP 23 O Left channel positive audio output

1, 24 – Power ground for left channel H-bridge

PGND

12, 13 – Power ground for right channel H-bridge

4, 21 – Power supply for left channel H-bridge

PV

DD

9, 16 – Power supply for right channel H-bridge
RINN 8 I Right channel negative differential audio input
RINP 17 I Right channel positive differential audio input

ROSC 18 I

A resistor connected to this terminal sets the oscillation frequency in conjunction with COSC. For proper

operation, connect a 120 kΩ resistor from ROSC to ground.
ROUTN 11 O Right channel negative audio output
ROUTP 14 O Right channel positive output

SHUTDOWN 10 I

Places the amplifier in shutdown mode if a TTL logic low is placed on this terminal; normal operation if a TTL

logic high is placed on this terminal.
V

DD

19 – Analog power supply

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

†

Supply voltage, VDD, PVDD –0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage, VI –0.3 V to VDD+0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

A

–40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating junction temperature range, T

J

–40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°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.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 125°C

POWER RATING

PWP 2.7 W 21.8 mW/°C 1.7 W 1.4 W

TPA2000D2
2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

recommended operating conditions

MIN MAX UNIT

Supply voltage, VDD, PV

DD

4.5 5.5 V

High-level input voltage, V

IH

GAIN0, GAIN1, SHUTDOWN 2 V

Low-level input voltage, V

IL

GAIN0, GAIN1, SHUTDOWN 0.8 V

Operating free-air temperature, T

A

–40 85 °C

PWM Frequency 200 300 kHz

electrical characteristics, TA = 25°C, VDD = PVDD = 5 V (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

| VOO | Output offset voltage (measured differentially) VI = 0 V 10 mV
PSRR Power supply rejection ratio VDD=PVDD = 4.5 V to 5.5 V –77 dB
I

IH

High-level input current VDD=PVDD = 5.5 V, VI = VDD = PV

DD

1 µA

I

IL

Low-level input current VDD=PVDD = 5.5 V, VI = 0 V –1 µA

I

DD

Supply current No filter (with or without speaker load) 8 10 mA

I

DD

Supply current With filter ,L = 22 µH, C = 1 µF 15 mA

I

DD(SD)

Supply current, shutdown mode 1 10 µA

operating characteristics, TA = 25°C, VDD = PVDD = 5 V, RL = 4 Ω, Gain = –2 V/V (unless otherwise
noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power THD = 0.1%, f = 1 kHz, RL = 3 Ω 2 W
THD+N Total harmonic distortion plus noise PO = 1 W, f = 20 Hz to 20 kHz <0.5%
B

OM

Maximum output power bandwidth THD = 5% 20 kHz
k

SVR

Supply ripple rejection ratio f = 1 kHz, C

(BYPASS)

= 0.4 µF –60 dB

SNR Signal-to-noise ratio 87 dBV

Integrated noise floor 20 Hz to 20 kHz, No input 56 µV
Z

I

Input impedance >20 kΩ

Table 1. Gain Settings

GAIN0 GAIN1

AMPLIFIER GAIN

(dB)

INPUT IMPEDANCE

(kΩ)

TYP TYP

0 0 8 104
0 1 12 74
1 0 17.5 44
1 1 23.5 24

TPA2000D2

2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

η Efficiency vs Output power 2, 3

In-band output spectrum vs Frequency 4

p

vs Output power 5 – 7

THD+N

Total harmonic distortion plus noise

vs Frequency 8, 9

test set-up for graphs

The THD+N measurements shown do not use an LC output filter, but use a low pass filter with a cut-of f frequency
of 20 kHz so the switching frequency does not dominate the measurement. This is done to ensure that the
THD+N measured is just the audible THD+N. The THD+N measurements are shown at the highest gain for
worst case.

The LC output filter used in the efficiency curves (Figure 2 and 3) is shown in Figure 1.

L1 = L2 = 22 µH (DCR = 110 mΩ,
Part Number = SCD0703T–220 M–S,
Manufacturer = GCI)
C1 = C2 = 1 µF

The ferrite filter used in the efficiency curves (Figure 2 and 3) is shown in Figure 1, where L is a ferrite bead.

L1 = L2 = ferrite bead (part number = 2512067007Y3, manufacturer = Fair-Rite)
C1 = C2 = 1 nF

C2

C1

L1

L2

OUT–

OUT+

Figure 1. Class-D Output Filter

TPA2000D2
2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS291B – MARCH 2000 – REVISED APRIL 2000

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 2

0

10

20

30

40

50

60

70

80

90

0 0.2 0.4 0.6 0.8 1 1.2

No Filter

Ferrite Bead Filter

LC Filter

Class–AB

RL = 8 Ω, Multimedia Speaker
VDD = 5 V

Efficiency – %

EFFICIENCY

vs

OUTPUT POWER

PO – Output Power – W

Figure 3

0

10

20

30

40

50

60

70

80

0 0.5 1 1.5 2

Ferrite Bead Filter

Notebook Speaker

Class–AB

Efficiency – %

EFFICIENCY

vs

OUTPUT POWER

PO – Output Power – W

LC Filter

RL = 3 Ω, Notebook PC Speaker
VDD = 5 V

–140

+0

–120

–100

–80

–60

–40

–20

0 24k2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k

Gain – dB

f – Frequency – Hz

IN-BAND OUTPUT SPECTRUM

VDD = 5 V,
Gain = 8 dB,
fIN = fO = 1 kHz,
PO = 1.5 W,
Bandwidth = 20 Hz to 22 kHz,
16386 Frequency Bins

Figure 4