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PDF PAM8006 Data sheet ( Hoja de datos )
| Número de pieza | PAM8006 | |
| Descripción | 10W STEREO CLASS-D AUDIO POWER AMPLIFIER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PAM8006 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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A Product Line of
Diodes Incorporated
PAM8006
10W STEREO CLASS-D AUDIO POWER AMPLIFIER
Description
The PAM8006 is a 10W (per channel) stereo Class-D audio amplifier
with fixed gain which offers low THD+N, low EMI, and good PSRR
producing high-quality sound reproduction.
The PAM8006 runs off from a 7.5V to 18V supply at much higher
efficiency than competitors’ ICs.
The PAM8006 only requires very few external components,
significantly saving cost and board space.
The PAM8006 is available in a 32pin QFN 5mm*5mm and TSSOP-
28PP package.
Pin Assignments
Features
10W @ 10%THD/ Channel Output into a 8Ω Load at 13V
Power Supply Range: 7.5V to 18V
Low SNR: 95dB
Over 90% Efficiency
With Shutdown/Mute Function
Over Current , Thermal, Short-Circuit Protection and UVLO
Low THD+N
Low Quiescent Current
Pop Noise Suppression
Small Package Outlines: Thin 32-pin QFN 5mm*5mm and
TSSOP-28PP Package
RoHS Pass and Green Package
Applications
Flat Monitor /LCD TVs
Multi-media Speaker System
DVD players, Game machines
Boom Box
Music instruments
PAM8006
Document number: DSxxxxx Rev. 1 - 0
1 of 16
www.diodes.com
November 2012
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
PAM8006
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Parameter
Supply Voltage (VCC)
Maximum Volume Control Pins, Input
Pins Voltage
High Level Input Voltage:
SD
MUTE
Low Level Input Voltage:
SD
MUTE
Ambient Operating Temperature
Junction Temperature Range, TJ
Rating
7.5 to 18.0
0 to 5.0
2.0 to VCC
2.0 to 5.0
0 to 0.3
0 to 0.3
-20 to +85
-40 to +125
Unit
V
V
V
V
°C
°C
Thermal Information
Parameter
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
Internal Power Dissipation (TA = +25°C)
Package
QFN 5x5
TSSOP-28PP
QFN 5x5
TSSOP-28PP
QFN 5x5
TSSOP-28PP
The exposed PAD must be soldered to a thermal land on the PCB
Symbol
θJA
θJC
PD
Max
18.1
27.8
7.6
14.4
5.52
3.60
Unit
°C/W
W
PAM8006
Document number: DSxxxxx Rev. 1 - 0
5 of 16
www.diodes.com
November 2012
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
PAM8006
Application Information (cont.)
Internal 2.5V Bias Generator Capacitor Selection
The internal 2.5V bias generator (V2P5) provides the internal bias for the preamplifier stage. The external input capacitors and this internal
reference allow the inputs to be biased within the optimal common-mode range of the input preamplifiers.
The selection of the capacitor value on the V2P5 terminal is critical for achieving the best device performance. During startup or recovery from
shutdown state, the V2P5 capacitor determines the rate at which the amplifier starts up. When the voltage on the V2P5 capacitor equals 0.75 x
V2P5, or 75% of its final value, the device turns on and the Class-D outputs start switching. The startup time is not critical for the best de-pop
performance since any heard pop sound is the result of the Class-D output switching-on other than that of the startup time. However, at least a
0.47μF capacitor is recommended for the V2P5 capacitor.
Another function of the V2P5 capacitor is to filter high frequency noise on the internal 2.5V bias generator.
Power Supply Decoupling, CS
The PAM8006 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic
distortion (THD) as low as possible. Power supply decoupling also prevents oscillations caused by long lead between the amplifier and the
speaker. The optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power supply
leads. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-seriesresistance (ESR) ceramic capacitor,
typically 1μF, is recommended, placing as close as possible to the device’s VCC lead. To filter lowerfrequency noises, a large aluminum
electrolytic capacitor of 10μF or greater is recommended, placing near the audio power amplifier. The 10μF capacitor also serves as a local
storage capacitor for supplying current during large signal transients on the amplifier outputs.
BSN and BSP Capacitors
The full H-bridge output stages use NMOS transistors only. They therefore require bootstrap capacitors for the high side of each output to turn on
correctly. A at least 220nF ceramic capacitor, rated for at least 25V, must be connected from each output to its corresponding bootstrap input.
Specifically, one 220nF capacitor must be connected from xOUTP to xBSP, and another 220nF capacitor from xOUTN to xBSN. It is
recommended to use 1µF BST capacitor to replace 220nF (pin15, pin16, pin35 and pin36) for lower than 100Hz applications.
VCLAMP Capacitors
To ensure that the maximum gate-to-source voltage for the NMOS output transistors not exceeded, two internal regulators are used to clamp the
gate voltage. Two 1μF capacitors must be connected from VCLAMP to ground and must be rated for at least 25V. The voltages at the VCLAMP
terminals vary with VCC and may not be used to power any other circuitry.
Internal Regulated 5-V Supply (AVDD)
The AVDD terminal is the output of an internallygenerated 5V supply, used for the oscillator, preamplifier. It requires a 0.1μF to 1μF capacitor,
placed very close to the pin to Ground to keep the regulator stable. The regulator may not be used to power any external circuitry.
Differential Input
The differential input stage of the amplifier eliminates noises that appear on the two input lines of the channel. To use the PAM8006 with a
differential source, connect the positive lead of the audio source to the INP input and the negative lead from the audio source to the INN input. To
use the PAM8006 with a single-ended source, acground the INP input through a capacitor equal in value to the input capacitor on INN and apply
the audio source to the INN input. In a single-ended input application, the INP input should be acgrounded at the audio source other than at the
device input for best noise performance.
Using Low-ESR Capacitors
Low-ESR capacitors are recommended throughout this application section. A real (with respect to ideal) capacitor can be modeled simply as a
resistor in series with an ideal capacitor. The voltage drop across this resistor minimizes the beneficial effects of the capacitor in the circuit. The
lower the equivalent value of this resistance the more the real capacitor behaves as an ideal capacitor.
Short-Circuit Protection
The PAM8006 has short circuit protection circuitry on the outputs to prevent damage to the device when output-to-output shorts, output-to-GND
shorts, or output-to-VCC shorts occur. Once a short-circuit is detected on the outputs, the output drive is immediately disabled. This is a latched
fault and must be reset by cycling the voltage on the SD pin to a logic low and back to the logic high state for normal operation. This will clear the
short-circuit flag and allow for normal operation if the short was removed. If the short was not removed, the protection circuitry will again activate.
PAM8006
Document number: DSxxxxx Rev. 1 - 0
11 of 16
www.diodes.com
November 2012
© Diodes Incorporated
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet PAM8006.PDF ] | |
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