TDA2005

TDA2005 20W BRIDGE AMPLIFIER FOR CAR RADIOHigh output power : PO = 10 + 10 W@RL = 2Ω, MULTIWATT11d = 10% ; PO = 20W@RL = 4Ω , d = 1 %. ORDERING NUMBERS : TDA2005M (Bridge Appl.)High reliability of the chip and package with addi- TDA2005S (Stereo Appl.)tional complete safety during operation thanks toprotection against : DESCRIPTION. OUTPUT DC AND AC SHORT CIRCUIT TO The TDA2005 is class B dual audio power amplifier GROUND in MULTIWATT® package specifically designed for car radio application : power booster amplifiers. OVERRATING CHIP TEMPERATURE are easily designed using this device that provides. LOAD DUMP VOLTAGE SURGE a high current capability (up to 3.5 A) and that can. FORTUITOUS OPEN GROUND drive very low impedance loads (down to 1.6Ω in. VERY INDUCTIVE LOADS stereo applications) obtaining an output power of more than 20 W (bridge configuration).Flexibility in use : bridge or stereo booster ampli-fiers with or without boostrap and with programma-ble gain and bandwidth.Space and cost saving : very low number ofexternal components, very simple mounting sys-tem with no electrical isolation between the pack-age and the heatsink (one screw only).In addition, the circuit offers loudspeaker protec-tion during short circuit for one wire to ground.ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value Unit 18 VVs Operating Supply Voltage 28 V 40 VVs DC Supply Voltage 4.5 A 3.5 AVs Peak Supply Voltage (for 50 ms) 30 W °CIo (*) Output Peak Current (non repetitive t = 0.1 ms) – 40 to 150Io (*) Output Peak Current (repetitive f ≥ 10 Hz)Ptot Power Dissipation at Tcase = 60 °C Tstg, Tj Storage and Junction Temperature(*) The max. output current is internally limited.PIN CONNECTIONMarch 1995 1/21

TDA2005SCHEMATIC DIAGRAMTHERMAL DATASymbol Parameter Max. Value UnitRth j-case Thermal Resistance Junction-case 3 °C/W2/21

TDA2005BRIDGE AMPLIFIER APPLICATION (TDA2005M)Figure 1 : Test and Application Circuit (Bridge amplifier)Figure 2 : P.C. Board and Components Layout of Figure 1 (1:1 scale) 3/21

TDA2005ELECTRICAL CHARACTERISTICS (refer to the Bridge application circuit, Tamb = 25oC, GV = 50dB,Rth (heatsink) = 4oC/W, unless otherwise specified)Symbol Parameter Test Conditions Min. Typ. Max. Unit Vs 8 Vos Supply Voltage Vs = 14.4V RL = 4Ω 75 18 V Vs = 13.2V RL = 3.2Ω 18 70 Id Output Offset Voltage (1) 20 150 mV (between pin 8 and pin 10) Vs = 14.4V 17 20 150 mV Vs = 13.2V 22 Total Quiescent Drain Current 19 150 mA 160 mAPo Output Power d = 10% f = 1 Hz W Vs = 14.4V RL = 4Ω Vs = 13.2V RL = 3.2Ω RL = 3.2 Ω d Distortion f = 1kHz Vs = 14.4V RL = 4Ω Po = 50mW to 15W 1% 1% Vs = 13.2V RL = 3.2Ω Po = 50mW to 13W Vi Input Sensitivity f = 1kHz RL = 4Ω Po = 2W RL = 3.2Ω Po = 2W 9 mV 8 mV Ri Input Resistance f = 1kHz 70 kΩ fL Low Frequency Roll Off (– 3dB) fH High Frequency Roll Off (– 3dB) RL = 3.2Ω 40 Hz Gv Closed Loop Voltage Gain eN Total Input Noise Voltage RL = 3.2Ω 20 kHzSVR Supply Voltage Rejection f = 1kHz 50 dB η Efficiency Rg = 10kΩ (2) 3 10 µV Rg = 10kΩ, C4 = 10µF 45 55 dB fripple = 100Hz, Vripple = 0.5V Vs = 14.4V, f = 1 kHz RL = 4Ω Po = 20W RL = 3.2Ω 60 % 60 % Po = 22W 58 % Vs = 13.2V, f = 1 kHz 145 °C RL = 3.2Ω Po = 19W Tj Thermal Shut-down Junction Vs = 14.4V, RL = 4Ω Temperature f = 1kHz, Ptot = 13W VOSH Output Voltage with one Side of Vs = 14.4V RL = 4Ω 2V the Speaker shorted to ground Vs = 13.2V RL = 3.2ΩNotes : 1. For TDA2005M only 2. Bandwith Filter : 22Hz to 22kHz.4/21

Figure 3 : Output Offset Voltage versus TDA2005 Supply Voltage Figure 4 : Distortion versus Output Power (bridge amplifier)Figure 5 : Distortion versus Output Power (bridge amplifier)BRIDGE AMPLIFIER DESIGNThe following consideraions can be useful when designing a bridge amplifier.Vo max Parameter Single Ended Bridge Peak Output Voltage (before clipping) Vs – 2 VCE sat 1 VS − 2 VCE satIo max Peak Output Current (before clippling) 2 (Vs – 2 VCE sat) 1 VS − 2 VCE sat RLPo max RMS Output Power (before clipping) 2 RL (VS − 2 VCE sat)2 1 (VS − 2 VCE sat)2 2 RL 4 2 RL 5/21Where : VCE sat = output transistors saturation voltage VS = allowable supply voltage RL = load impedance

TDA2005Voltage and current swings are twice for a bridge For sufficiently high gains (40 to 50dB) it is possibleamplifier in comparison with single ended amplifier. to put R2 = R4 and R3 = 2 R1, simplifing the formulaIn order words, with the same RL the bridge con- in :figuration can deliver an output power that is fourtimes the output power of a single ended amplifier, GV = 4 R1 R2while, with the same max output current the bridgeconfiguration can deliver an output power that is Gv (dB) R1 (Ω) R2 = R4 (Ω) R3 (Ω)twice the output power of a single ended amplifier.Core must be taken when selecting VS and RL in 40 1000 39 2000order to avoid an output peak current above the 50 1000 12 2000absolute maximum rating.From the expression for IO max, assuming Figure 6 : Bridge ConfigurationVS = 14.4V and VCE sat = 2V, the minimum loadthat can be driven by TDA2005 in bridge configu-ration is : RL min = VS − 2 VCEsat = 14.4 −4 = 2.97Ω IO max 3.5The voltage gain of the bridge configurationis givenby (see Figure 34) : GV = V0 = 1 +  R1  + R3 V1  R2 ⋅ R4  R4  R2 + R4 STEREO AMPLIFIER APPLICATION (TDA2005S)Figure 7 : Typical Application Circuit6/21

TDA2005ELECTRICAL CHARACTERISTICS (refer to the Stereo application circuit, Tamb = 25oC, GV = 50dB,Rth (heatsink) = 4oC/W, unless otherwwise specified)Symbol Parameter Test Conditions Min. Typ. Max. Unit Vs Supply Voltage 8 Vo Quiescent Output Voltage Vs = 14.4V 6.6 7.2 18 V Vs = 13.2V 6 6.6 7.8 VId Total Quiescent Drain Current Vs = 14.4V 6 65 7.2 V Vs = 13.2V 7 62 9 120 mA 10 6.5 120 mA 6 8Po Output Power (each channel) f = 1kHz, d = 10% 9 10 W 11 Vs = 14.4V RL = 4Ω 6.5 10 RL = 3.2Ω 12 RL = 2Ω RL = 1.6Ω Vs = 13.2V RL = 3.2Ω RL = 1.6Ω Vs = 16V RL = 2Ωd Distortion (each channel) f = 1kHz Vs = 14.4V RL = 4Ω Po = 50mW to 4W 0.2 1 % Vs = 14.4V RL = 2Ω Po = 50mW to 6W 0.3 1 % Vs = 13.2V RL = 3.2Ω Po = 50mW to 3W 0.2 1 % Vs = 13.2V RL = 1.6Ω Po = 40mW to 6W 0.3 1 % dBCT Cross Talk (1) Vs = 14.4V, Vo = 4VRMS RL = 4Ω, Rg = 5kΩ 60 f = 1kHz 45 f = 10kHzVi Input Saturation Voltage 300 mVVi Input Sensitivity f = 1kHz, Po = 1W mV RL = 4Ω RL = 3.2Ω 6 5.5 f = 1kHz Ri Input Resistance 70 200 kΩ fL Low Frequency Roll Off (– 3dB) RL = 2Ω fH High Frequency Roll Off (– 3dB) RL = 2Ω 50 Hz Gv Voltage Gain (open loop) f = 1kHz Gv Voltage Gain (closed loop) 15 kHz∆ Gv Closed Loop Gain Matching f = 1kHz eN Total Input Noise Voltage 90 dBSVR Supply Voltage Rejection 48 50 51 dB η Efficiency 0.5 dB Rg = 10kΩ (2) 1.5 5 µV Rg = 10kΩ, C3 = 10µF 35 45 dB fripple = 100Hz, Vripple = 0.5V Vs = 14.4V, f = 1kHz Po = 6.5W RL = 4Ω 70 % RL = 2Ω 60 % Po = 10W 70 % Vs = 13.2V, f = 1kHz 60 % Po = 6.5W RL = 3.2Ω 145 °C RL = 1.6Ω Po = 100WTj Thermal Shut-down Junction TemperatureNotes : 1. For TDA2005M only 2. Bandwith Filter : 22Hz to 22kHz. 7/21

TDA2005 Figure 9 : Quiescent Drain Current versus Supply Voltage (Stereo amplifier)Figure 8 : Quiescent Output Voltage versus Supply Voltage (Stereo amplifier)Figure 10 : Distortion versus Output Power Figure 11 : Output Power versus Supply Voltage (Stereo amplifier) (Stereo amplifier)Figure 12 : Output Power versus Supply Voltage Figure 13 : Distortion versus Frequency (Stereo amplifier) (Stereo amplifier)8/21

Figure 14 : Distortion versus Frequency TDA2005 (Stereo amplifier) Figure 15 : Supply Voltage Rejection versus C3 (Stereo amplifier)Figure 16 : Supply Voltage Rejection versus Figure 17 : Supply Voltage Rejection versus Frequency (Stereo amplifier) C2 and C3 (Stereo amplifier)Figure 18 : Supply Voltage Rejection versus Figure 19 : Gain versus Input Sensitivity C2 and C3 (Stereo amplifier) (Stereo amplifier) 9/21

TDA2005 Figure 21 : Total Power Dissipation and Effi- ciency versus Output PowerFigure 20 : Gain versus Input Sensitivity (Bridge amplifier) (Stereo amplifier)Figure 22 : Total Power Dissipation and Effi- ciency versus Output Power (Stereo amplifier)10/21

TDA2005APPLICATION SUGGESTIONThe recommended values of the components are those shown on Bridge applicatiion circuit of Figure 1.Different values can be used ; the following table can help the designer.Comp. Recom. Purpose Larger Than Smaller Than Value Smaller Po max Smaller Po maxR1 120 kΩ Optimization of the Output SymmetryR2 1kΩR3 2 kΩR4, R5 12 Ω Closed Loop Gain Setting (see Bridge Amplifier Design) (*)R6, R7 1 Ω Frequency Stability Danger of Oscillation at High Frequency with Inductive LoadsC1 2.2 µF Input DC DecouplingC2 2.2 µF Optimization of Turn on Pop and High Turn on Delay Higher Turn on Pop, Higher Turn on Delay Low Frequency Cut-off, Increase of NoiseC3 0.1 µF Supply by Pass Danger of OscillationC4 10 µF Ripple Rejection Increase of SVR, Increase of Degradation of SVR. the Switch-on TimeC5, C7 100 µF Bootstrapping Increase of Distortion at low FrequencyC6, C8 220 µF Feedback Input DC Decoupling, Higher Low Frequency Low Frequency Cut-off Cut-offC9, C10 0.1 µF Frequency Stability Danger of Oscillation(*) The closed loop gain must be higher than 32dB. 11/21

TDA2005APPLICATION INFORMATIONFigure 23 : Bridge Amplifier without BoostrapFigure 24 : P.C. Board and Components Layout of Figure 23 (1:1 scale)12/21

TDA2005APPLICATION INFORMATION (continued)Figure 25 : Dual - Bridge AmplifierFigure 26 : P.C. Board and Components Layout of Figure 25 (1:1 scale) 13/21

TDA2005APPLICATION INFORMATION (continued)Figure 27 : Low Cost Bridge Amplifier (GV = 42dB)Figure 28 : P.C. Board and Components Layout of Figure 27 (1:1 scale)14/21

TDA2005APPLICATION INFORMATION (continued)Figure 29 : 10 + 10 W Stereo Amplifier with Tone Balance and Loudness ControlFigure 30 : Tone Control Response (circuit of Figure 29) 15/21

TDA2005APPLICATION INFORMATION (continued)Figure 31 : 20W Bus AmplifierFigure 32 : Simple 20W Two Way Amplifier (FC = 2kHz)16/21

TDA2005APPLICATION INFORMATION (continued)Figure 33 : Bridge Amplifier Circuit suited for Low-gain Applications (GV = 34dB)Figure 34 : Example of Muting Circuit 17/21

TDA2005BUILT-IN PROTECTION SYSTEMS Open Ground When the ratio is in the ON condition and theLoad Dump Voltage Surge ground is accidentally opened, a standard audioThe TDA2005 has a circuit which enables it to amplifier will be damaged. On the TDA2005 pro-withstand a voltage pulse train, on Pin 9, of the type tection diodes are included to avoid any damage.shown in Figure 36.If the supply voltage peaks to more than 40V, then Inductive Loadan LC filter must be inserted between the supply A protection diode is provided to allow use of theand pin 9, in order to assure that the pulses at pin TDA2005 with inductive loads.9 will be held withing the limits shown.A suggested LC network is shown in Figure 35. DC VoltageWith this network, a train of pulses with amplitude The maximum operating DC voltage for theup to 120V and width of 2ms can be applied at point TDA2005 is 18V.A. This type of protection is ON when the supply However the device can withstand a DC voltage upvoltage (pulse or DC) exceeds 18V. For this reason to 28V with no damage. This could occur duringthe maximum operating supply voltage is 18V. winter if two batteries are series connected to crank the engine.Figure 35 Thermal Shut-downFigure 36 The presence of a thermal limiting circuit offers the following advantages : 1) an overload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood. 2) the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature : all that happensis that PO (and therefore Ptot) and Id are reduced. The maximum allowable power dissipation de- pends upon the size of the external heatsink (i.e. its thermal resistance) ; Figure 37 shows the dissi- pable power as a function of ambient temperature for different thermal resistance. Loudspeaker Protection The circuit offers loudspeaker protection during short circuit for one wire to ground.Short Circuit (AC and DC conditions)The TDA2005 can withstand a permanent short-cir-cuit on the output for a supply voltage up to 16V.Polarity InversionHigh current (up to 10A) can be handled by thedevice with no damage for a longer period than theblow-out time of a quick 2A fuse (normally con-nected in series with the supply). This feature isadded to avoid destruction, if during fitting to thecar, a mistake on the connection of the supply ismade.18/21

TDA2005Figure 37 : Maximum Allowable Power Dissipa- Figure 38 : Output Power and Drain Current ver- tion versus Ambient Temperature sus Case TemperatureFigure 39 : Output Power and Drain Current ver- sus Case Temperature 19/21

TDA2005MULTIWATT11 PACKAGE MECHANICAL DATA DIM. MIN. mm MAX. MIN. in ch MAX. TYP. 5 TYP. 0.197 A 0.49 0.019 0.104 B 0.88 1 2.65 0.035 0.039 0.063 C 1.45 1.6 0.057 D 16.75 1.7 0.659 0.067 0.022 E 19.6 17 0.55 0.772 0.669 0.037 F 0.95 0.077 G 21.9 22.2 1.95 0.862 0.874 0.679 G1 21.7 22.1 17.25 0.854 0.87 H1 17.4 17.5 0.685 0.689 0.795 H2 17.25 10.7 20.2 0.679 0.421 0.886 L 10.3 4.55 22.5 0.406 0.179 0.886 L1 2.65 5.08 22.5 0.104 0.200 0.713 L2 4.25 18.1 0.167 0.699 L3 4.73 17.75 0.186 0.429 L4 1.9 10.9 0.075 0.114 L7 1.9 2.9 0.075 0.191 M 3.65 4.85 0.144 0.214 M1 5.43 0.102 S 2.6 0.102 S1 2.6 0.152 Dia1 3.8520/21

TDA2005Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for theconsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. Nolicense is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentionedin this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without expresswritten approval of SGS-THOMSON Microelectronics. © 1995 SGS-THOMSON Microelectronics - All Rights Reserved MULTIWATT ® is a Registered Trademark of SGS-THOMSON Microelectronics SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singa- pore - Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 21/21