TDA8932 NXP Semiconductors, TDA8932 Datasheet - Page 6

• Manufacturer Part Number: TDA8932
• Manufacturer: NXP Semiconductors

Specifications of TDA8932

• Operational Class: Class-D
• Output Power (typ): 50x1@8Ohm/25x2@4OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.015@4Ohm@1W%
• Single Supply Voltage (typ): 22V
• Dual Supply Voltage (typ): ±11V
• Power Supply Requirement: Single/Dual
• Power Dissipation: 5W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 10V
• Single Supply Voltage (max): 36V
• Dual Supply Voltage (min): ±5V
• Dual Supply Voltage (max): ±18V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Philips Semiconductors
8. Functional description
TDA8932_1
Preliminary data sheet
8.1 General
8.2 Mode selection and interfacing
The TDA8932 is a mono full-bridge or stereo half-bridge audio power amplifier using
class-D technology. The audio input signal is converted into a Pulse Width Modulated
(PWM) signal via an analog input stage and PWM modulator. To enable the output power
Diffusion Metal Oxide Semiconductor (DMOS) transistors to be driven, this digital PWM
signal is applied to a control and handshake block and driver circuits for both the high side
and low side. A 2nd-order low-pass filter converts the PWM signal to an analog audio
signal across the loudspeakers.
The TDA8932 contains two independent half-bridges with full differential input stages. The
loudspeakers can be connected in the following configurations:
The TDA8932 contains common circuits to both channels such as the oscillator, all
reference sources, the mode functionality and a digital timing manager. The following
protections are built-in: thermal foldback, temperature, current and voltage protections.
The TDA8932 can be switched in three operating modes using pins POWERUP and
ENGAGE:
Both pins POWERUP and ENGAGE refer to pin CGND.
Table 4
ENGAGE pins.
Table 4.
[1]
Mode
Sleep
Mute
Operating
Fault
•
•
•
•
•
•
Mono full-bridge: Bridge Tied Load (BTL)
Stereo half-bridge: Single-Ended (SE)
Sleep mode: with low supply current.
Mute mode: the amplifiers are switching idle (50 % duty cycle), but the audio signal at
the output is suppressed by disabling the Vl-converter input stages. The capacitors on
pins HVP1 and HVP2 have been charged to half the supply voltage (asymmetrical
supply only).
Operating mode: the amplifiers are fully operational with output signal.
Fault mode.
In case of symmetrical supply conditions the voltage applied to pins POWERUP and ENGAGE must never
exceed the supply voltage (V
shows the different modes as function of the voltages on the POWERUP and
Mode selection
Pin
POWERUP
< 0.8 V
2 V to 6.0 V
2 V to 6.0 V
2 V to 6.0 V
Rev. 01 — 11 May 2006
[1]
[1]
[1]
DDA
, V
DDP1
or V
ENGAGE
< 0.8 V
< 0.8 V
3 V to 6.0 V
don’t care
DDP2
).
[1]
[1]
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Class-D audio amplifier
DIAG
don’t care
> 2 V
> 2 V
< 0.8 V
TDA8932
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