TFA9842AJ/N1,112 NXP Semiconductors, TFA9842AJ/N1,112 Datasheet

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TFA9842AJ/N1,112

Manufacturer Part Number
TFA9842AJ/N1,112
Description
IC AMP AUDIO PWR 7.5W STER 9SIL
Manufacturer
NXP Semiconductors
Type
Class ABr
Datasheet
1.TFA9842AJN1112.pdf (18 pages)

Specifications of TFA9842AJ/N1,112

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
7.5W x 2 @ 4 Ohm
Voltage - Supply
9 V ~ 28 V
Features
Depop, Mute, Short-Circuit and Thermal Protection, Standby, Volume Control
Mounting Type
Through Hole
Package / Case
9-SIL (Bent and Staggered Leads)
Product
Class-AB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
935278063112
TFA9842AJ/N1
TFA9842AJ/N1

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Allchip Electronic(HK) Limited Allchip Electronic(HK) Limited
Part Number:
TFA9842AJ/N1,112
Manufacturer:
NXP
Quantity:
15 768
1. General description
2. Features
3. Applications
The TFA9842AJ contains two identical audio power amplifiers. The TFA9842AJ can be
used as two Single-Ended (SE) channels with a volume control. The maximum gain is
26 dB.
The TFA9842AJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9842AJ
is pin compatible with the TFA9843AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J. The
difference between the TFA9843AJ and the TFA9843(B)J, TFA9842(B)J, TFA9841J is the
functionality of pin 7. The TFA9843AJ has a Volume Control (VC) on pin 7. The
TFA9843(B)J, TFA9842(B)J and TFA9841J have a mode select (MODE) on pin 7.
The TFA9842AJ contains a unique protection circuit that is solely based on multiple
temperature measurements inside the chip. This gives maximum output power for all
supply voltages and load conditions with no unnecessary audio holes. Almost any supply
voltage and load impedance combination can be made as long as thermal boundary
conditions (number of channels used, external heatsink and ambient temperature) allow
it.
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TFA9842AJ
7.5 W stereo power amplifier with volume control
Rev. 01 — 28 April 2006
2 channel SE: 1 W to 7.5 W operation possibility
Soft clipping
Input clamps
Volume control
Standby and Mute mode
No on or off switching plops
Low standby current
High supply voltage ripple rejection
Outputs short-circuit protected to ground, supply and across the load
Thermally protected
Pin compatible with the TFA9843AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J
CRT TV and LCD TV
Monitors
PC speakers
Boom box
Mini and micro audio receivers
Preliminary specification

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TFA9842AJ/N1,112 Summary of contents

Page 1

TFA9842AJ 7.5 W stereo power amplifier with volume control Rev. 01 — 28 April 2006 1. General description The TFA9842AJ contains two identical audio power amplifiers. The TFA9842AJ can be used as two Single-Ended (SE) channels with a volume control. ...

Page 2

Philips Semiconductors 4. Quick reference data Table 1. Symbol CC(stb THD G v(max SVRR [1] A minimum load of 3 [2] Supply voltage ripple rejection is measured at the output, with ...

Page 3

Philips Semiconductors 6. Block diagram Fig 1. Block diagram 7. Pinning information 7.1 Pinning Fig 2. Pin configuration TFA9842AJ_1 Preliminary specification 7.5 W stereo power amplifier with volume control IN1 IN2 60 k ...

Page 4

Philips Semiconductors 7.2 Pin description Table 3. Symbol IN2 OUT2 CIV IN1 GND SVR VC OUT1 Functional description 8.1 Input configuration The input cut-off frequency is 3dB – Single-ended application 3dB – ...

Page 5

Philips Semiconductors 8.2.2 Headroom Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom, compared to the average power output, for transferring the loudest parts without distortion and P CC Listening Level (ALL) ...

Page 6

Philips Semiconductors 8.5 Built-in protection circuits The TFA9842AJ contains two types of temperature sensors; one measures the local temperatures of the power stages and one measures the global chip temperature local temperature of the power stage of approximately ...

Page 7

Philips Semiconductors 11. Static characteristics Table unless otherwise specified. Symbol stb I(VC) I I(VC) [1] A minimum load of 3 [2] The DC output voltage ...

Page 8

Philips Semiconductors [2] Supply voltage ripple rejection is measured at the output, with a source impedance Z and with a frequency range from kHz (unweighted). The ripple voltage is a sine wave with a frequency f ...

Page 9

Philips Semiconductors ( THD = kHz L Fig 7. Output power as a function of supply voltage 0 cs ...

Page 10

Philips Semiconductors 13. Application information 13.1 Application diagrams 13.1.1 Single-ended Application CONTROLLER 22 F Fig 11. SE application diagram Remark: Switching inductive loads, the output voltage can rise beyond the maximum supply voltage ...

Page 11

Philips Semiconductors 13.1.2 Volume control drive options Fig 12. Volume control drive circuit with 3.3 V PWM PWM Fig 13. Volume control drive circuit with 5 V 13.2 Printed-circuit board 13.2.1 Layout and grounding To obtain a high-level system performance, ...

Page 12

Philips Semiconductors Fig 15. Printed-circuit board layout (single-sided); components view 13.2.2 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 to the ...

Page 13

Philips Semiconductors R th(tot and R CC 8.4 W; see dissipation, is: 150 th(tot) R th(tot) R th(h-a) This calculation is for an application at worst-case (stereo) sine-wave output signals. In practice ...

Page 14

Philips Semiconductors 15. Package outline DBS9P: plastic DIL-bent-SIL power package; 9 leads (lead length 12/11 mm); exposed die pad DIMENSIONS (mm are the original dimensions) (2) (1) (2) UNIT ...

Page 15

Philips Semiconductors 16. Soldering 16.1 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 16

Philips Semiconductors 17. Revision history Table 11. Revision history Document ID Release date TFA9842AJ_1 20060428 TFA9842AJ_1 Preliminary specification 7.5 W stereo power amplifier with volume control Data sheet status Change notice Preliminary data sheet - Rev. 01 — 28 April ...

Page 17

Philips Semiconductors 18. Legal information 18.1 Data sheet status [1][2] Document status Product status Objective [short] data sheet Development Preliminary [short] data sheet Qualification Product [short] data sheet Production [1] Please consult the most recently issued document before initiating or ...

Page 18

Philips Semiconductors 20. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...

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