TDA8945S/N1,112 NXP Semiconductors, TDA8945S/N1,112 Datasheet - Page 4

• Manufacturer Part Number: TDA8945S/N1,112
• Description: IC AMP AUDIO PWR 15W MONO 9SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TDA8945S/N1,112

• Output Type: 1-Channel (Mono)
• Package / Case: 9-SIL (Straight Leads)
• Max Output Power X Channels @ Load: 15W x 1 @ 8 Ohm
• Voltage - Supply: 6 V ~ 25 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Product: Class-AB
• Output Power: 15 W
• Available Set Gain: 32 dB
• Thd Plus Noise: 0.03 %
• Operating Supply Voltage: 18 V
• Maximum Power Dissipation: 14000 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Audio Load Resistance: 8 Ohms
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Type: Single
• Supply Voltage (max): 25 V
• Supply Voltage (min): 6 V
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 15x1@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.03@8Ohm@1W%
• Single Supply Voltage (typ): 18V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 14W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 6V
• Single Supply Voltage (max): 25V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-3509-5; 935262856112; TDA8945SU

Philips Semiconductors
9397 750 06866
Product specification
8.2.1 Output power measurement
8.1 Input configuration
8.2 Power amplifier
The TDA8945S inputs can be driven symmetrical (floating) as well as asymmetrical.
In the asymmetrical mode one input pin is connected via a capacitor to the signal
ground which should be as close as possible to the SVR (electrolytic) capacitor
ground. Note that the DC level of the input pins is half of the supply voltage V
coupling capacitors for both pins are necessary.
The input cut-off frequency is:
For R
As shown in
necessary;
minimized. This results in a good low frequency response and good switch-on
behaviour.
Remark: To prevent HF oscillations do not leave the inputs open, connect a capacitor
of at least 1.5 nF across the input pins close to the device.
The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output
stage, capable of delivering a peak output current of 2 A.
The BTL principle offers the following advantages:
The output power as a function of the supply voltage is measured on the output pins
at THD = 10%; see
supply voltage of 18 V and the maximum available output current: 2 A repetitive peak
current.
f
f
•
•
•
•
i cut off
i cut off
Lower peak value of the supply current
The ripple frequency on the supply voltage is twice the signal frequency
No expensive DC-blocking capacitor
Good low frequency performance.
i
–
–
= 45 k and C
=
=
so the switch-on delay during charging of the input capacitors, can be
Equation 1
---------------------------- -
2
---------------------------------------------------------------- -
2
R
45 10
1
i
Rev. 02 — 7 April 2000
Figure
i
C
= 220 nF:
i
3
and 2, large capacitor values for the inputs are not
1
8. The maximum output power is limited by the maximum
220 10
9 –
=
16 Hz
15 W mono BTL audio amplifier
© Philips Electronics N.V. 2000. All rights reserved.
TDA8945S
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