IC AMP AUDIO PWR 7W STER 17SIL

TDA8944AJ/N2,112

Manufacturer Part NumberTDA8944AJ/N2,112
DescriptionIC AMP AUDIO PWR 7W STER 17SIL
ManufacturerNXP Semiconductors
TypeClass AB
TDA8944AJ/N2,112 datasheet
 


Specifications of TDA8944AJ/N2,112

Output Type2-Channel (Stereo)Max Output Power X Channels @ Load7W x 2 @ 8 Ohm
Voltage - Supply4.5 V ~ 18 VFeaturesDepop, Mute, Short-Circuit and Thermal Protection, Standby, Volume Control
Mounting TypeThrough HolePackage / Case17-SIL (Bent and Staggered Leads)
Operational ClassClass-ABAudio Amplifier Output Configuration2-Channel Stereo
Output Power (typ)7x2@8OhmWAudio Amplifier FunctionSpeaker
Total Harmonic Distortion0.07@8Ohm@1W%Single Supply Voltage (typ)12V
Dual Supply Voltage (typ)Not RequiredVPower Supply RequirementSingle
Power Dissipation18WRail/rail I/o TypeNo
Single Supply Voltage (min)4.5VSingle Supply Voltage (max)18V
Dual Supply Voltage (min)Not RequiredVDual Supply Voltage (max)Not RequiredV
Operating Temp Range-40C to 85COperating Temperature ClassificationIndustrial
MountingThrough HolePin Count17
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names568-3461-5
935270284112
TDA8944AJU
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TDA8944AJ
2 x 7 W BTL audio amplifier with DC gain control
Rev. 01 — 01 March 2002
M3D541
1. General description
The TDA8944AJ is a dual-channel audio power amplifier with DC gain control. It has
an output power of 2
Bridge-Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute
logic. The overall gain can be adjusted from +30 dB down to 50 dB using a DC
control voltage. This feature can be used for volume control or a preset gain.
The TDA8944AJ comes in a 17-pin DIL-bent-SIL (DBS) power package and is pin
compatible with the TDA8944J.
2. Features
Gain/volume adjustment via a DC control pin
Soft clipping
Operating at a low supply voltage
Standby and mute mode
No on/off switching plops
Low standby current
High supply voltage ripple rejection
Outputs short-circuit protected to ground, supply and across the load
Thermally protected
Printed-circuit board compatible with TDA8946AJ and TDA8580J.
3. Applications
Mains fed applications (e.g. TV sound)
PC audio
Portable audio.
4. Quick reference data
Table 1:
Symbol Parameter
V
CC
I
q
I
stb
P
o
THD
7 W at an 8
load and a 12 V supply. The circuit contains two
Quick reference data
Conditions
supply voltage
quiescent supply current
V
= 12 V; R
CC
standby supply current
output power
THD = 10%; R
V
= 12 V
CC
total harmonic distortion
P
= 1 W
o
Product data
Min
Typ
Max
Unit
4.5
12
18
V
=
-
40
50
mA
L
-
-
10
= 8 ;
6
7
-
W
L
-
0.07
0.5
%
A

TDA8944AJ/N2,112 Summary of contents

  • Page 1

    TDA8944AJ BTL audio amplifier with DC gain control Rev. 01 — 01 March 2002 M3D541 1. General description The TDA8944AJ is a dual-channel audio power amplifier with DC gain control. It has an output power of ...

  • Page 2

    Philips Semiconductors Table 1: Symbol Parameter G v(max) G v(cr) SVRR 5. Ordering information Table 2: Type number Package TDA8944AJ 6. Block diagram idth Fig 1. Block diagram. 9397 750 09433 Product data BTL audio amplifier ...

  • Page 3

    Philips Semiconductors 7. Pinning information 7.1 Pinning Fig 2. Pin configuration. 7.2 Pin description Table 3: Symbol OUT1 GND1 V CC1 OUT1 n.c. IN1 SGND IN1 IN2 MODE SVR IN2 9397 750 09433 Product data BTL ...

  • Page 4

    Philips Semiconductors Table 3: Symbol GC OUT2 GND2 V CC2 OUT2 8. Functional description The TDA8944AJ is a stereo BTL audio power amplifier capable of delivering 2 output power external heatsink. The gain of both amplifiers can ...

  • Page 5

    Philips Semiconductors The input cut-off frequency is cut off For cut off As shown in the switch-on delay during charging of the input capacitors can be minimized. This results in a good low frequency response ...

  • Page 6

    Philips Semiconductors Table 4: Headroom For the average listening level a power dissipation can be used for a heatsink calculation. 8.3 Mode selection The TDA8944AJ has three functional modes, which can be selected ...

  • Page 7

    Philips Semiconductors 8.6 Built-in protection circuits The TDA8944AJ contains two types of protection circuits, i.e. short-circuit and thermal shutdown. 8.6.1 Short-circuit protection Short-circuit to ground or supply line — This is detected by a so-called ‘missing current’ detection circuit which ...

  • Page 8

    Philips Semiconductors 11. Static characteristics Table 7: Static characteristics amb L Symbol Parameter V supply voltage CC I quiescent supply current q I standby supply current ...

  • Page 9

    Philips Semiconductors 12. Dynamic characteristics Table 8: Dynamic characteristics kHz amb L unless otherwise specified. Symbol Parameter P output power o THD total ...

  • Page 10

    Philips Semiconductors 2 10 handbook, halfpage THD (%) Fig 8. Total harmonic distortion as function of output power. 16 handbook, halfpage P o (W) ...

  • Page 11

    Philips Semiconductors 10 handbook, halfpage P ( Fig 12. Power dissipation as function of output power. handbook, halfpage ...

  • Page 12

    Philips Semiconductors 13. Internal circuitry Table 9: Pin 6 and 8 12 and 9 1 and 4 14 and 17 10 9397 750 09433 Product data BTL audio amplifier with DC gain control Internal circuitry Symbol ...

  • Page 13

    Philips Semiconductors Table 9: Pin 11 13 9397 750 09433 Product data BTL audio amplifier with DC gain control Internal circuitry …continued Symbol Equivalent circuit SVR handbook, halfpage GC handbook, halfpage 13 Rev. 01 — 01 ...

  • Page 14

    Philips Semiconductors 14. Application information handbook, full pagewidth R source 220 220 source 220 220 nF MICROCONTROLLER (1) To prevent high frequency oscillations do not leave the inputs open, connect a ...

  • Page 15

    Philips Semiconductors 220 nF Fig 16. Printed-circuit board layout (single-sided); components view. 14.1.2 Power supply decoupling Proper supply bypassing is critical for low-noise performance and high supply voltage ripple rejection. The respective capacitor location should be as close as possible ...

  • Page 16

    Philips Semiconductors see Figure dissipation - is: 150 P R th(tot) R th(h-a) The calculation above is for an application at worst-case (stereo) sine-wave output signals. In practice music signals will be applied, which decreases the maximum ...

  • Page 17

    Philips Semiconductors 16. Package outline DBS17P: plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm DIMENSIONS (mm are the original dimensions) (1) UNIT 17.0 4.6 ...

  • Page 18

    Philips Semiconductors 17. Soldering 17.1 Introduction to soldering through-hole mount packages This text gives a brief insight to wave, dip and manual soldering. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit ...

  • Page 19

    Philips Semiconductors 19. Data sheet status [1] [2] Data sheet status Product status Objective data Development Preliminary data Qualification Product data Production [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product ...

  • Page 20

    Philips Semiconductors Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . ...