Tda8954

		
TDA8954

2 × 210 W class-D power amplifier

Rev. 01 — 24 December 2009
Product data sheet
1. General description
The TDA8954 is a stereo or mono high-efficiency Class D audio power amplifier in a

single IC featuring low power dissipation. It is designed to deliver up to 2 × 210 W into a


4 Ω load in a stereo Single-Ended (SE) application, or 1 × 420 W into an 8 Ω load in a

mono Bridge-Tied Load (BTL) application.

It combines the benefits of Class D efficiency (≈93 % into a 4 Ω load) with audiophile

sound quality comparable to that associated with Class AB amplification.

The amplifier operates over a wide supply voltage range from ±12.5 V to ±42.5 V and

features low quiescent current consumption.
The TDA8954 is supplied with two diagnostic pins for monitoring the status of Thermal
Fold Back (TFB), Over Current Protection (OCP) and other protection circuits.
2. Features

High output power in typical applications:


SE 2 × 210 W, RL = 4 Ω (VDD = 41 V; VSS = −41 V)


SE 2 × 235 W, RL = 3 Ω (VDD = 39 V; VSS = −39 V)


SE 2 × 150 W, R = 6 Ω (V = 41 V; V = −41 V)www.DataSheet.net/

L DD
SS

BTL 1 × 420 W, RL = 8 Ω (VDD = 41 V; VSS = −41 V)


Symmetrical operating supply voltage range from ±12.5 V to ±42.5 V


Stereo full differential inputs, can be used as stereo SE or mono BTL amplifier


Low noise


Smooth pop noise-free start-up and switch off


2-pin diagnostics for protection circuits


Fixed frequency internal or external clock


High efficiency ≈93 %


Zero dead time switching


Low quiescent current


Advanced protection strategy: voltage protection and output current limiting


Thermal FoldBack (TFB) with disable functionality


Fixed gain of 30 dB in SE and 36 dB in BTL applications


Fully short-circuit proof across load


BD modulation in BTL configuration


Clock protection

Datasheet pdf - http://www.DataSheet4U.co.kr/

1 pageNXP Semiconductors
TDA8954

2 × 210 W class-D power amplifier

7.2 Pin description
Table 3. Pin description
Symbol Pin
Description
TDA8954TH TDA8954J
VSSA
1
18 negative analog supply voltage
SGND
2
19 signal ground
VDDA
3
20 positive analog supply voltage
IN2M
4
21 channel 2 negative audio input
IN2P
5
22 channel 2 positive audio input
MODE 6
23 mode selection input: Standby, Mute or Operating
mode
OSC
7
1
oscillator frequency adjustment or tracking input
IN1P
8
2
channel 1 positive audio input
IN1M
9
3
channel 1 negative audio input
DIAG1 10
4
diagnostic output 1 (open drain; TFB)
OSCREF 11
5
reference for OSC pin
DIAG2 12
6
diagnostic output 2 (open drain; protection functions)
PROT
13
7
decoupling capacitor for protection (OCP)
VDDP1 14
8
channel 1 positive power supply voltage
BOOT1 15
9
channel 1 bootstrap capacitor
OUT1
VSSP1
16
17
10 channel 1 PWM output
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11 channel 1 negative power supply voltage
STABI
18
12
decoupling of internal stabilizer for logic supply
n.c. 19 17 not connected
VSSP2 20 13 channel 2 negative power supply voltage
OUT2
21
14
channel 2 PWM output
BOOT2 22 15 channel 2 bootstrap capacitor
VDDP2 23 16 channel 2 positive power supply voltage
VSSA
24
—
negative analog supply voltage
8. Functional description
8.1 General
The TDA8954 is a two-channel audio power amplifier that uses Class D technology.
For each channel, the audio input signal is converted into a digital Pulse Width Modulation

(PWM) signal using an analog input stage and a PWM modulator; see Figure 1. To drive

the output power transistors, the digital PWM signal is fed to a control and handshake
block and to high- and low-side driver circuits. This level-shifts the low-power digital PWM
signal from a logic level to a high-power PWM signal switching between the main supply
lines.
A second-order low-pass filter converts the PWM signal to an analog audio signal that can
be used to drive a loudspeaker.
TDA8954_1
Product data sheet
Rev. 01 — 24 December 2009
NXP B.V. 2009. All rights reserved.
5 of 46
Datasheet pdf — http://www.DataSheet4U.co.kr/
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TDA8954

2 × 210 W class-D power amplifier

Rev. 01 — 24 December 2009
Product data sheet
1. General description
The TDA8954 is a stereo or mono high-efficiency Class D audio power amplifier in a

single IC featuring low power dissipation. It is designed to deliver up to 2 × 210 W into a

4 Ω load in a stereo Single-Ended (SE) application, or 1 × 420 W into an 8 Ω load in a

mono Bridge-Tied Load (BTL) application.

It combines the benefits of Class D efficiency (≈93 % into a 4 Ω load) with audiophile

sound quality comparable to that associated with Class AB amplification.

The amplifier operates over a wide supply voltage range from ±12.5 V to ±42.5 V and

features low quiescent current consumption.
The TDA8954 is supplied with two diagnostic pins for monitoring the status of Thermal
Fold Back (TFB), Over Current Protection (OCP) and other protection circuits.
2. Features

High output power in typical applications:

SE 2 × 210 W, RL = 4 Ω (VDD = 41 V; VSS = −41 V)

SE 2 × 235 W, RL = 3 Ω (VDD = 39 V; VSS = −39 V)

SE 2 × 150 W, R = 6 Ω (V = 41 V; V = −41 V)www.DataSheet.net/

L DD
SS

BTL 1 × 420 W, RL = 8 Ω (VDD = 41 V; VSS = −41 V)

Symmetrical operating supply voltage range from ±12.5 V to ±42.5 V

Stereo full differential inputs, can be used as stereo SE or mono BTL amplifier

Low noise

Smooth pop noise-free start-up and switch off

2-pin diagnostics for protection circuits

Fixed frequency internal or external clock

High efficiency ≈93 %

Zero dead time switching

Low quiescent current

Advanced protection strategy: voltage protection and output current limiting

Thermal FoldBack (TFB) with disable functionality

Fixed gain of 30 dB in SE and 36 dB in BTL applications

Fully short-circuit proof across load

BD modulation in BTL configuration

Clock protection

Datasheet pdf — http://www.DataSheet4U.co.kr/

NXP Semiconductors
TDA8954

2 × 210 W class-D power amplifier

3. Applications

DVD

Mini and micro receiver

Subwoofers

Home Theater In A Box (HTIAB) system

High-power speaker system

Public Address (PA) system

4. Quick reference data
Table 1. Quick reference data
Symbol Parameter
Conditions
General

VDD

VSS

Vth(ovp)

positive supply voltage
negative supply voltage
overvoltage protection
threshold voltage
Operating mode
Operating mode

Standby, Mute modes; VDD − VSS

IDD(tot) total positive supply current the sum of the currents through pins VDDA,

VDDP1 and VDDP2
Operating mode; no load; no filter; no RC-snubber
network connected;

ISS(tot) total negative supply current the sum of the currents through pins VSSA, VSSP1

and VSSP2
Operating mode; no load; no filter; no RC-snubber
network connected;
www.DataSheet.net/
Stereo single-ended configuration

Po output power

Tj = 85 °C; LLC = 15 μH; CLC = 680 nF (see

Figure 13)
Mono bridge-tied load configuration

THD + N = 10 %; RL = 4 Ω; VDD = 41 V;

VSS = −41 V

THD + N = 10 %; RL = 4 Ω; VDD = 35 V;

VSS = −35 V

Po output power

Tj = 85 °C; LLC = 22 μH; CLC = 680 nF (see

Figure 13); RL = 8 Ω; THD + N = 10 %; VDD = 41 V;

VSS = −41 V

Min Typ

12.5 41

−12.5 −41

85 —
— 50
— 65

—

—
210
150

—

420
Max Unit
42.5 V

−42.5 V

90 V
60 mA
75 mA
-W
-W
-W

VDD is the supply voltage on pins VDDP1, VDDP2 and VDDA.

VSS is the supply voltage on pins VSSP1, VSSP2 and VSSA.

Output power is measured indirectly; based on RDSon measurement; see Section 14.3.

5. Ordering information
Table 2. Ordering information
Type number
Package
Name
Description
Version
TDA8954J
DBS23P plastic DIL-bent-SIL power package; 23 leads (straight lead length 3.2 mm) SOT411-1
TDA8954TH
HSOP24 plastic, heatsink small outline package; 24 leads; low stand-off height
SOT566-3
TDA8954_1
Product data sheet
Rev. 01 — 24 December 2009
NXP B.V. 2009. All rights reserved.
2 of 46
Datasheet pdf — http://www.DataSheet4U.co.kr/

NXP Semiconductors
6. Block diagram
TDA8954

2 × 210 W class-D power amplifier

VDDA DIAG1
STABI PROT
VDDP2
VDDP1
IN1M
IN1P
OSCREF
OSC
MODE
SGND
IN2P
IN2M
3 (20) 10 (4)
18 (12) 13 (7)
23 (16)
14 (8)
15 (9)
9 (3)
8 (2)
INPUT
STAGE

11 (5) mute

7 (1)
6 (23)
OSCILLATOR
MODE
PWM
MODULATOR
STABI
MANAGER

SWITCH1 CONTROL

AND
HANDSHAKE
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
DRIVER
HIGH
DRIVER
LOW
TDA8954TH
(TDA8954J)
2 (19)
mute
5 (22)
4 (21)
INPUT
STAGE
PWM
MODULATOR
CONTROL
SWITCH2
AND
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
16 (10)
VSSP1
VDDP2
22 (15)
21 (14)
BOOT1
OUT1
BOOT2
OUT2
1 (18) 12 (6)
VSSA DIAG2
24 (-)
19 (17)
VSSA
n.c.
17 (11) 20 (13)
VSSP1 VSSP2
010aaa556
Fig 1.
Pin numbers in brackets refer to type number TDA8954J.
Block diagram
www.DataSheet.net/
TDA8954_1
Product data sheet
Rev. 01 — 24 December 2009
NXP B.V. 2009. All rights reserved.
3 of 46
Datasheet pdf — http://www.DataSheet4U.co.kr/