Philips TFA9843AJ Datasheet Download Page 17

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TFA9843AJ_1

Preliminary data sheet

Rev. 01 — 28 April 2006

17 of 19

Philips Semiconductors

TFA9843AJ

20 W stereo power amplifier with volume control

17. Revision history

Table 11.

Revision history

Document ID

Release date

Data sheet status

Change notice

Supersedes

TFA9843AJ_1

20060428

Preliminary data sheet

Summary of Contents for TFA9843AJ

Page 1: ...e 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 2 Features n 2 channel SE 1 W to 20 W operation possibility n Soft clipping n Input clamps n Volume co...

Page 2: ...dering information Table 1 Quick reference data VCC 18 V Tamb 25 C RL 4 Ω VI VC VCC Vi 0 V measured in test circuit of Figure 11 unless otherwise specified Symbol Parameter Conditions Min Typ Max Unit VCC supply voltage operating 1 9 18 28 V Iq quiescent current VCC 18 V RL 60 100 mA ICC stb standby supply current VCC 18 V VI VC 0 8 V 150 µA Po output power THD 10 RL 4 Ω VCC 18 V 7 8 5 W THD 10 RL...

Page 3: ...reo power amplifier with volume control 6 Block diagram 7 Pinning information 7 1 Pinning Fig 1 Block diagram 001aae428 VOLUME CONTROL SHORT CIRCUIT AND TEMPERATURE PROTECTION VREF 0 5VCC VCC VCC 9 4 IN1 IN2 OUT1 OUT2 SVR CIV VC 1 3 7 8 2 6 5 GND TFA9843AJ 60 kΩ 60 kΩ Fig 2 Pin configuration TFA9843AJ OUT2 CIV IN1 GND SVR VC OUT1 001aae429 IN2 VCC 2 1 3 4 5 6 7 8 9 ...

Page 4: ...erating mode maximum gain the input clamp voltage is 1 V RMS 8 2 Power amplifier The power amplifier is a single ended amplifier with an all NPN output stage capable of delivering a peak output current of 4 A 8 2 1 Output power measurement The output power as a function of the supply voltage is measured on the output pins at THD 10 see Figure 7 The maximum output power is limited by the supply vol...

Page 5: ...d with an electrolytic capacitor of 150 µF connected to pin SVR with a bandwidth of 20 Hz to 22 kHz The SVRR as a function of the frequency is illustrated in Figure 10 A larger capacitor value on pin SVR improves the ripple rejection behavior at the lower frequencies Table 4 Power rating as function of headroom Headroom Power output THD 0 5 SE Power dissipation P both channels driven 0 dB Po 6 5 W...

Page 6: ... in repetitive switching during too high junction temperature This protects the TFA9843AJ against short circuits to ground to the supply voltage across the load and too high chip temperatures The protection will only be activated when necessary so even during a short circuit condition a certain amount of pulsed current will still flow through the short circuit as much as the power stage can handle...

Page 7: ...ge 2 9 V VI VC input voltage on pin VC On mode maximum gain 5 0 VCC V Volume control mode 1 5 5 0 V Mute mode 1 2 1 5 V Standby mode 0 0 8 V II VC input current on pin VC 0 V VI VC VCC 20 µA Table 9 Dynamic characteristics SE VCC 18 V Tamb 25 C RL 4 Ω f 1 kHz VI VC VCC measured in test circuit of Figure 11 unless otherwise specified Symbol Parameter Conditions Min Typ Max Unit Po output power THD ...

Page 8: ... and an amplitude of 300 mV RMS which is applied to the positive supply rail 3 Output voltage in Mute mode VI VC 1 35 V and an input voltage of 1 V RMS in a bandwidth from 20 Hz to 22 kHz including noise VCC 18 V THD 10 Fig 3 Voltage gain as a function of volume control voltage Fig 4 Output power one channel as a function of supply voltage for various loads 001aae340 VI VC V 0 6 0 4 0 2 0 50 100 0...

Page 9: ...hannel output power per channel worst case both channels driven 8 28 50 0 10 20 30 40 12 Po W 16 20 24 VCC V mce491 0 20 Po W 10 0 2 4 6 8 4 Ptot W 8 12 16 mce507 VCC 18 V RL 4 Ω VCC 18 V ZS 0 Ω Vripple 300 mV RMS a bandpass filter of 20 Hz to 22 kHz has been applied inputs short circuited Fig 9 Channel separation as a function of frequency no bandpass filter applied Fig 10 Supply voltage ripple r...

Page 10: ...rk By switching inductive loads the output voltage can rise beyond the maximum supply voltage of 28 V At high supply voltage it is recommended to use Schottky diodes between the supply voltage and ground Fig 11 SE application diagram MICRO CONTROLLER 001aae430 60 kΩ 60 kΩ 22 µF 10 µF 220 nF 150 µF VOLUME CONTROL SHORT CIRCUIT AND TEMPERATURE PROTECTION VREF 0 5VCC VCC VCC 9 4 IN1 IN2 OUT1 OUT2 SVR...

Page 11: ...ontrol 13 1 2 Volume control drive options Fig 12 Volume control drive circuit with 3 3 V PWM Fig 13 Volume control drive circuit with 5 V PWM Fig 14 Volume control drive circuit with potentiometer 001aae337 1 kΩ R5 1 kΩ R4 R2 1 kΩ R1 10 kΩ D1 5 6 V R3 1 kΩ T3 T1 T2 C1 10 µF PWM 3 3 V VC VCC GND 5 V 001aae338 1 kΩ R4 C1 10 µF PWM 5 V VC 001aae339 16 kΩ R5 R6 16 kΩ R1 10 kΩ D1 10 V T1 C1 10 µF VC V...

Page 12: ...roper 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 device and connected to the power ground Proper power supply decoupling also prevents unwanted oscillations For suppressing higher frequency transients spikes on the supply rail a capacitor with low ESR typical 100 nF has to b...

Page 13: ...This can be calculated using the maximum temperature increase divided by the power dissipation Rth tot Tj max Tamb max P At VCC 18 V and RL 4 Ω 2 SE the measured worst case sine wave dissipation is 8 4 W see Figure 8 For Tj max 150 C the temperature raise caused by the power dissipation is 150 60 90 C P Rth tot 90 C Rth tot 90 8 4 K W 10 7 K W Rth h a Rth tot Rth j mb 10 7 K W 2 0 K W 8 7 K W This...

Page 14: ...lifier with volume control 14 Test information 14 1 Quality information The General Quality Specification for Integrated Circuits SNW FQ 611 is applicable 1 RL 2 Ω 2 RL 4 Ω 3 RL 6 Ω 4 RL 8 Ω 5 RL 16 Ω 2 SE loads Tamb 25 C external heatsink of 10 K W music signals Fig 16 Junction temperature as a function of supply voltage 8 150 100 50 0 12 28 VCC V 16 20 24 mce504 Tj C 1 2 3 4 5 ...

Page 15: ... mm maximum per side are not included 2 Plastic surface within circle area D1 may protrude 0 04 mm maximum SOT523 1 0 10 mm 5 scale w M bp Dh q1 Z 1 9 e e1 m e2 x A2 non concave D1 D P k q2 L3 L2 L Q c E 00 07 03 03 03 12 DBS9P plastic DIL bent SIL power package 9 leads lead length 12 11 mm exposed die pad SOT523 1 view B mounting base side B UNIT bp L1 c D 1 Dh L q2 mm 2 7 2 3 A2 2 0 80 0 65 0 58...

Page 16: ...ive solder waves must not exceed 5 seconds The device may be mounted up to the seating plane but the temperature of the plastic body must not exceed the specified maximum storage temperature Tstg max If the printed circuit board has been pre heated forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit 16 3 Manual soldering Apply the solder...

Page 17: ...ary data sheet Rev 01 28 April 2006 17 of 19 Philips Semiconductors TFA9843AJ 20 W stereo power amplifier with volume control 17 Revision history Table 11 Revision history Document ID Release date Data sheet status Change notice Supersedes TFA9843AJ_1 20060428 Preliminary data sheet ...

Page 18: ...ent nor in applications where failure or malfunction of a Philips Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage Philips Semiconductors accepts no liability for inclusion and or use of Philips Semiconductors products in such equipment or applications and therefore such inclusion and or use is for the customer s own ri...

Page 19: ... 4 8 2 1 Output power measurement 4 8 2 2 Headroom 5 8 3 Mode selection 5 8 4 Supply voltage ripple rejection 5 8 5 Built in protection circuits 6 9 Limiting values 6 10 Thermal characteristics 6 11 Static characteristics 7 12 Dynamic characteristics 7 13 Application information 10 13 1 Application diagrams 10 13 1 1 Single ended application 10 13 1 2 Volume control drive options 11 13 2 Printed c...

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