PAM8124 Datasheet, PDF (11/15 Pages) Diodes Incorporated – HIGH POWER AUDIO

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 ¹⁹
GAIN0 ¹⁸
C8
0.1uF
C11
10uF
G0
GAIN1 ¹⁷
G1
BSR ^{16 C6 1uF}
ROUT ¹⁵
PGNDR ¹⁴
PGNDR ¹³
L2
33uH
C18
470uF
C16
R4
220nF 4.7K
L_out
8ohm
8ohm
R_out
C9
0.1uF
C12
10uF
VCC
C14
470uF
Schematic for Single-Ended (SE) Configuration (8Ω Speaker)
PAM8124
Document number: DS36627 Rev. 1 - 2
11 of 15
www.diodes.com
October 2013
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