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PDF PAM8124 Data sheet ( Hoja de datos )
| Número de pieza | PAM8124 | |
| Descripción | HIGH POWER AUDIO | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Description
The PAM8124 is a 15W efficient, Class-D audio power amplifier for
driving stereo speakers in a single-ended configuration; or a mono
speaker in a bridge-tied-load configuration. The PAM8124 can drive
stereo speakers (SE) as low as 4Ω. Due to the low power dissipation
and high efficiency, up to 95%, the device can be used without any
external heat sink when playing music.
The gain of the amplifier is controlled by 2 gain selectable pins,
offering 20dB, 26dB, 32dB, and 36dB gain selections.
The PAM8124 is available in a TSSOP-24-EP package.
Features
• 30W/Ch into 8Ω BTL Load from 22V Supply
• 15W/Ch into 4Ω SE Load from 22V Supply
• 10W/Ch into 8Ω SE Load from 24V Supply
• Operate from 10V to 26V
• Single-Ended Analog Inputs
• Supports Multiple Output Configurations:
2-Ch Single-Ended (SE, Half-Bridge)
1-Ch Bridge-Tied Load (BTL, Full-Bridge)
• Four Selectable Fixed-gain Settings
• No Pop Noise for Start-up and Shut-down Sequences
• Internal Oscillator (No External Components Required)
• High Efficient Class-D Operation Eliminates Need for Heat Sinks
• Thermal and Short-Circuit Protection with Auto Recovery
• Space-Saving Surface-Mount TSSOP-24EP Package
• Pb-Free Package
A Product Line of
Diodes Incorporated
PAM8124
HIGH POWER AUDIO
Pin Assignments
TSSOP-24-EP
PVCCL 1
SDN 2
PVCCL 3
MUTE 4
LIN 5
RIN 6
VCM 7
AGND 8
AGND 9
PVCCR 10
VCLAMP 11
PVCCR 12
24 PGNDL
23 PGNDL
22 LOUT
21 BSL
20 AVCC
19 SE_BTL
18 GAIN0
17 GAIN1
16 BSR
15 ROUT
14 PGNDR
13 PGNDR
Applications
• Televisions
• Home Sound Systems
• Active Speakers
Typical Applications Circuit
10V_to_26V
SD
Mute
L_in
R_in
C1
1uF
C3
1uF
10V_to_26V
U1
1 PVCCL
2 SDN
3 PVCCL
4 MUTE
5 LIN
6 RIN
7 VCM
8 AGND
9 AGND
10 PVCCR
11 VCLAMP
12 PVCCR
PGNDL
PGNDL
LOUT
BSL
AVCC
SE_BTL
GAIN0
GAIN1
BSR
ROUT
PGNDR
PGNDR
24
23
22 L1
33uH
21
C2 1uF
20 10V_to_26V
19 SE_BTL
18 G0
17 G1
16 C4 1uF
15 L2
14 33uH
13
C5 R1
220nF 4.7K C7
470uF
L_out1
8ohm
C8
470uF
C6 R2
220nF 4.7K
8ohm
R_out1
PAM8124
Document number: DS36627 Rev. 1 - 2
1 of 15
www.diodes.com
October 2013
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
PAM8124
Performance Characteristics (@TA = +25°C, VCC = 24V, f = 1kHz, Gain = 20dB unless otherwise specified.)
+0
-5
-10
-15
-20
-25
-30
-35
-40
-45
d
B
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
-100
20
Crosstalk vs. Frequency (RL = 4Ω, SE)
PO = 1W
L to R/ R to L
(Red /Blue)
50
100
200
500
Hz
1k
2k
5k
10k 20k
+0
-5
-10
-15
-20
-25
-30
-35
-40
-45
d
B
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
-100
20
Crosstalk vs. Frequency (RL = 8Ω, SE)
TT
PO = 1W
L to R/ R to L
(Red / Blue)
50
100
200
500
Hz
1k
2k
5k
10k 20k
+0
-5
-10
-15
-20
-25
-30
-35
d
B
-40
-45
-50
-55
-60
-65
-70
-75
-80
20
PSRR vs. Frequency (RL = 4Ω, SE)
TT
50 100 200
500
Hz
1k
2k
5k 10k 20k
+0T
-5
-10
-15
-20
-25
-30
-35
d
B
-40
-45
-50
-55
-60
-65
-70
-75
-80
20
PSRR vs. Frequency (RL = 8Ω, SE)
TT
50 100 200
500
Hz
1k
2k
5k 10k 20k
+0T T T
-5
-10
-15
-20
-25
-30
-35
d
B
-40
-45
-50
-55
-60
-65
-70
-75
-80
20
PSRR vs. Frequency (RL = 8Ω, BTL)
TTT
50 100 200
500
Hz
1k
2k
5k
10k 20k
+0
-10
-20
-30
-40
-50
d
B -60
r
-70
A
-80
-90
-100
-110
-120
-130
20
Noise Floor (RL = 8Ω, SE)
50 100 200
500
Hz
1k
2k
5k 10k 20k
PAM8124
Document number: DS36627 Rev. 1 - 2
5 of 15
www.diodes.com
October 2013
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
PAM8124
Application Information (cont.)
Thermal Protection
Thermal protection on the PAM8124 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 60°C. The
device begins normal operation at this point without external system intervention.
Over Voltage Protection and Under Voltage Lock-out (OVP and UVLO)
An over voltage protection (OVP) circuit is integrated in PAM8124, when the supply voltage is over 28V the OVP is active and then the output
stage is disabled. The PAM8124 will auto recovery when the supply voltage is lower than the OVP threshold.
The PAM8124 incorporates circuitry designed to detect low supply voltage. When the supply voltage drops to 9V or below, the PAM8124 goes
into a state of shutdown. When the supply voltage is higher than UVLO threshold normal operation is resumed.
Typical Applications Circuits
C7
0.1uF
C10
10uF
C13
470uF
U1
1 PVCCL
SD 2 SDN
3 PVCCL
Mute
R1
L_in C1 1uF R2
R_in C2 1uF
4 MUTE
5 LIN
6 RIN
7 VCM
C4
1uF
8 AGND
9 AGND
C3 10 PVCCR
1uF 11 VCLAMP
12 PVCCR
VCC
PGNDL
PGNDL
LOUT
BSL
AVCC
24
23
22
21
C5 1uF
20
L1
33uH
C15 R3
220nF 4.7K C17
470uF
VCC
SE_BTL
GAIN0
19
18
C8
0.1uF
C11
10uF
G0
GAIN1
17
G1
BSR 16 C6 1uF
ROUT
PGNDR
PGNDR
15
14
13
L2
33uH
C18
470uF
C16 R4
220nF 4.7K
L_out
8ohm
8ohm
R_out
C9
0.1uF
C12
10uF
C14
470uF
VCC
Schematic for Single-Ended (SE) Configuration (8Ω Speaker)
PAM8124
Document number: DS36627 Rev. 1 - 2
11 of 15
www.diodes.com
October 2013
© Diodes Incorporated
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet PAM8124.PDF ] | |
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