apa0712 Anpec Electronics Corporation, apa0712 Datasheet - Page 16

• Manufacturer Part Number: apa0712
• Description: 1.4w Mono Audio Low-voltage Audio Power Amplifier
• Manufacturer: Anpec Electronics Corporation

Application Descriptions (Cont.)
Power Dissipation (Cont.)
tion11 states the maximum power dissipation point
for a SE mode operating at a given supply voltage and
driving a specified load.
In BTL mode operation, the output voltage swing is
doubled as in SE mode. Thus the maximum power
dissipation point for a BTL mode operating at the same
given conditions is 4 times as in SE mode.
Even with this substantial increase in power dissipation,
the APA0712 does not require extra heat-sink. The
power dissipation from equation12, assuming a 5V-
power supply and an 8
than the power dissipation that results from the
equation13:
For WLCSP-9, the thermal resistance (
165
Since the maximum junction temperature (T
APA0712 is 150
is defined by the power system design, the maximum
power dissipation, which the IC package is able to
handle, can be obtained from equation13. Once the
power dissipation is greater than the maximum limit
(P
the load impedance (R
ambient temperature should be reduced.
Copyright
Rev. A.2 - Aug., 2007
APA0712
D.MAX
SE mode:
BTL mode:
O
P
C/W.
D.MAX
), the supply voltage (V
ANPEC Electronics Corp.
T
J.MAX
O
P
P
C and the ambient tem- perature (T
D.MAX
D.MAX
JA
T
A
L
2
) must be increased or the
2
load, must not be greater
V
V
DD
2
2
DD
R
R
DD
2
2
L
L
) must be decreased,
JA
) is equal to
(11)
(12)
(13)
J.MAX
) of
A
)
16
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