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PDF PAM8615 Data sheet ( Hoja de datos )
| Número de pieza | PAM8615 | |
| Descripción | 16W/ 32W STEREO CLASS-D AUDIO POWER AMPLIFIER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
PAM8615
16W/ 32W STEREO CLASS-D AUDIO POWER AMPLIFIER
Description
The PAM8615 is a 16W 32W (per channel) efficient Class-D audio
power amplifier for driving stereo speakers in a single-ended
configuration or mono bridge-tied speaker. The PAM8615 can drive
single-ended speakers as low as 4Ω. Due to the low power
dissipation and high efficiency the device can be used without any
external heat sink when playing music.
Stereo speaker volume is controlled with a DC voltage applied to the
volume control terminal offering a range of gain from -40dB to +36dB.
The PAM8615 is available in a TSSOP-24 package.
Pin Assignments
Features
• 32W/ch into 8Ω BTL Load from 24V Supply (Thermal Limited)
• 16W/ch into 4Ω SE Load from 24V Supply (Thermal Limited)
• Operates from 8V to 30V
• Supports Multiple Output Configurations:
2-Ch Single-ended (half bridge)(16WX2)
1 Ch Bridge-tied load (full bridge) (32WX1)
• High Efficiency Above 90%
• 64-Setup DC Volume Control from -40dB to +36dB
• Singel Ended Analog Inputs
• Thermal and Short-Circuit Protection
• Flexible Frequency Adjustable by External Component
• Clock Output for Synchronization with Multiple Class-D Devices
• No Pop Noise for Start-Up and Shut-Down Sequences
• Space-Saving Surface-Mount 24 Pin TSSOP Package
• Pb-Free Package
Applications
• Televisions
• Home Sound Systems
PAM8615
Document number: DSxxxxx Rev. 1 - 1
1 of 14
www.diodes.com
October 2012
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
PAM8615
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Parameter
Supply Voltage (VCC)
DCV Volume Control Pin
fOSC Oscillator Frequency (ROSC = 100kΩ)
TA – Operating Free-Air Temperature
Ambient Operating Temperature
Ambient Temperature Range
Junction Temperature Range
Rating
10 to 26
0 to 5
250 to 350
-40 to +85
-20 to +85
-40 to +160
-40 to +85
Unit
V
kHz
°C
Thermal Information
Parameter
Thermal Resistance (Junction to Ambient)
Package
TSSOP-24
Symbol
θJA
Max
30
Unit
°C/W
Electrical Characteristics (@TA = +25°C, VCC = 24V, Gain = 20dB, RL = 4Ω, unless otherwise specified.)
Parameter
Class-D Output Offset Voltage (measured differently)
Quiescent Supply Current
Quiescent Supply Current in Mute Mode
Quiescent Supply Current in Shutdown Mode
Oscillator Frequency
Drain-Source On-State Resistance
Power Supply Rejection Ratio
Output Power at 1% THD+N
Output Power at 10% THD+N
Output Power at 1% THD+N
Output Power at 10% THD+N
Total Harmonic Distortion + Noise
Output Integrated Noise Floor
Crosstalk
Signal-to-Noise Ratio
Thermal Trip Point
Thermal Hystersis
Symbol
|VOS|
ICC
ICC(MUTE)
ICC(SD)
fOSC
RDS(ON)
PSRR
PO(SE)
PO(BTL)
THD+N
VN
CS
SNR
Test Conditions
VI = 0V, AV = 36dB
SHDN = 2V, MUTE = 0V, Input
AC_GND, No load
MUTE = 2V, No load
SHDN = 0.5V, No load
ROSC = 100kΩ
VCC = 24V,IO = 1A, TA = 27°C
VCC = 23.5V to 24.5V
VCC = 24V, RL = 4Ω, f = 1kHz
VCC = 24V, RL = 8Ω, f = 1kHz
VCC = 24V, RL = 4Ω, f = 1kHz
VCC = 24V, RL = 8Ω, f = 1kHz
VCC = 24V, RL = 8Ω, f = 1kHz
VCC = 12V, RL=8Ω, f = 1kHz
VCC = 24V, RL = 8Ω, f = 1kHz
VCC = 12V, RL = 8Ω, f = 1kHz
RL = 4Ω, f = 1kHz, Po = 10W
RL = 8Ω, f = 1kHz, Po = 5W
20Hz to 22kHz, A-weighted
filter, Gain = 20dB
PO = 1W, f = 1kHz, Gain = 20dB
Max output at THD+N<1%,
f = 1kHz, Gain = 20dB
Min Typ Max Units
10 65 mV
25 40 mA
25
5
323
220
-60
14
8.2
17.3
9.8
27
7
35
9
0.25%
0.15%
40
20
mA
µA
kHz
mΩ
dB
W
W
-67 dBV
-60 dB
86 dB
160 °C
40 °C
PAM8615
Document number: DSxxxxx Rev. 1 - 1
5 of 14
www.diodes.com
October 2012
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
PAM8615
Application Information (cont.)
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 PAM8615 has short circuit protection circuitry on the outputs to prevent damage to the device when output-to-output shorts (BTL mode),
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.
Thermal Protection
Thermal protection on the PAM8615 prevents damage to the device when the internal die temperature exceeds +160°C. There is a ±15 degree
tolerance on this trip point from device to device. Once the die temperature exceeds the set thermal point, the device enters into the shutdown
state and the outputs are disabled. This is not a latched fault. The thermal fault is cleared once the temperature of the die is reduced by +40°C.
The device begins normal operation at this point without external system intervention.
Master-Slave and SYNC Operation
The MS/SL and SYNC terminals can be used to synchronize the frequency of the class-D output switching. When the MS/SL is high or left
floating due to the internal pull up resistor, the switching frequency is determined by the ROSC. The SYNC becomes an output whose
source/sink current is about 0.5mA, and the frequency of this output is also determined by the ROSC. And this output can be connected to
another PAM8615 who is configured in the slave mode. The output switching is synchronized to avoid any beat frequencies that occur in the
audio band when two Class-D amplifiers in the same system are switching at the slight different frequencies. When the MS/SL is low, the
switching frequency is determined by the incoming square wave on the SYNC input. The SNYC becomes an input in this mode and accept a
square wave from another PAM8615 configured in the master mode or from an external GPIO.
(Key: MS/SL = ”H”, Master Mode, MS/SL = ”L”, Slave Mode)
PAM8615
Document number: DSxxxxx Rev. 1 - 1
11 of 14
www.diodes.com
October 2012
© Diodes Incorporated
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet PAM8615.PDF ] | |
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