TDA8944AJ/N2,112 NXP Semiconductors, TDA8944AJ/N2,112 Datasheet - Page 7

• Manufacturer Part Number: TDA8944AJ/N2,112
• Description: IC AMP AUDIO PWR 7W STER 17SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TDA8944AJ/N2,112

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 7W x 2 @ 8 Ohm
• Voltage - Supply: 4.5 V ~ 18 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby, Volume Control
• Mounting Type: Through Hole
• Package / Case: 17-SIL (Bent and Staggered Leads)
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 7x2@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.07@8Ohm@1W%
• Single Supply Voltage (typ): 12V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 18W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 17
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3461-5; 935270284112; TDA8944AJU

Philips Semiconductors
9. Limiting values
Table 5:
In accordance with the Absolute Maximum Rating System (IEC 60134).
10. Thermal characteristics
Table 6:
9397 750 09433
Product data
Symbol
V
V
I
T
T
P
V
Symbol
R
R
ORM
CC
I
stg
amb
tot
CC(sc)
th(j-a)
th(j-mb)
Limiting values
Thermal characteristics
Parameter
thermal resistance from junction to ambient
thermal resistance from junction to mounting base both channels driven
Parameter
supply voltage
input voltage
repetitive peak output current
storage temperature
operating ambient temperature
total power dissipation
supply voltage to guarantee short-circuit
protection
8.6.1 Short-circuit protection
8.6.2 Thermal shutdown protection
8.6 Built-in protection circuits
The TDA8944AJ contains two types of protection circuits, i.e. short-circuit and
thermal shutdown.
Short-circuit to ground or supply line — This is detected by a so-called ‘missing
current’ detection circuit which measures the current in the positive supply line and
the current in the ground line. A difference between both currents larger than 0.8 A,
switches the power stage to the standby mode; high impedance of the outputs and
very low supply current.
Short-circuit across the load — This is detected by an absolute-current
measurement. An absolute-current larger than 2 A, switches the power stage to
standby mode; high impedance of the outputs and a very low supply current.
The junction temperature is measured by a temperature sensor; at a junction
temperature of approximately 150 C this detection circuit switches the power stage
to the standby mode; high impedance of the outputs and very low supply current.
Rev. 01 — 01 March 2002
Conditions
no signal
operating
non-operating
2 x 7 W BTL audio amplifier with DC gain control
Conditions
in free air
Min
-
-
-
0.3
0.3
0.3
55
40
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
TDA8944AJ
Max
+25
+18
V
2
+150
+85
18
15
CC
+ 0.3
Value
40
4.5
Unit
V
V
V
A
W
V
C
C
Unit
K/W
K/W
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