Pam8124 new prod uc t, Application information, Pam8124 – Diodes PAM8124 User Manual
Page 11: A product line of diodes incorporated, Thermal protection, Typical applications circuits
PAM8124
Document number: DS36627 Rev. 1 - 2
11 of 15
October 2013
© Diodes Incorporated
PAM8124
NEW PROD
UC
T
A Product Line of
Diodes Incorporated
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
PVCCL
1
SDN
2
PVCCL
3
MUTE
4
LIN
5
RIN
6
VCM
7
AGND
8
AGND
9
PVCCR
10
VCLAMP
11
PVCCR
12
PGNDR
13
PGNDR
14
ROUT
15
BSR
16
GAIN1
17
GAIN0
18
SE_BTL
19
AVCC
20
BSL
21
LOUT
22
PGNDL
23
PGNDL
24
U1
C10
10uF
C7
0.1uF
C12
10uF
C9
0.1uF
C14
470uF
C13
470uF
SD
R1
Mute
R2
C1
1uF
C2
1uF
C4
1uF
C3
1uF
C15
220nF
L1
33uH
G0
C5
1uF
C8
0.1uF
G1
C11
10uF
VCC
VCC
VCC
R3
4.7K
C17
470uF
L_out
8ohm
C16
220nF
L2
33uH
C6
1uF
R4
4.7K
C18
470uF
R_out
8ohm
L_in
R_in
P
A
M
8124
Schematic for Single-Ended (SE) Configuration (8Ω Speaker)