TDA2003

 TDA2003 10W CAR RADIO AUDIO AMPLIFIER DESCRIPTION The TDA 2003 has improved performancewith the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low numberof externalcomponents,ease of assembly, space and cost saving, are maintained. Thedeviceprovidesa high outputcurrentcapability (up to 3.5A) very low harmonic and cross-over distortion. Completely safe operation is guaranteed due to protectionagainst DCand ACshort circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground. October 1998 Symbol Parameter Value Unit VS Peak supply voltage (50ms) 40 V VS DC supply voltage 28 V VS Operating supply voltage 18 V IO Output peak current (repetitive) 3.5 A IO Output peak current (non repetitive) 4.5 A Ptot Power dissipation at Tcase = 90°C 20 W Tstg, Tj Storage and junction temeperature -40 to 150 °C ABSOLUTE MAXIMUM RATINGS TEST CIRCUIT PENTAWATT ORDERING NUMBERS : TDA 2003H TDA 2003V 1/10 Symbol Parameter Value Unit Rth-j-case Thermal resistance junction-case max 3 °C/W THERMAL DATA 2/10 PIN CONNECTION (top view) SCHEMATIC DIAGRAM TDA2003 Symbol Parameter Test conditions Min. Typ. Max. Unit DC CHARACTERISTICS (Refer to DC test circuit) Vs Supply voltage 8 18 V Vo Quiescent output voltage (pin 4) 6.1 6.9 7.7 V Id Quiescent drain current (pin 5) 44 50 mA AC CHARACTERISTICS (Refer to AC test circuit, Gv = 40 dB) Po Output power d = 10% f = 1 kHz RL = 4Ω RL = 2Ω RL = 3.2Ω RL = 1.6Ω 5.5 9 6 10 7.5 12 W W W W Vi(rms) Input saturation voltage 300 mV Vi Input sensitivity f = 1 kHz Po = 0.5W Po = 6W Po = 0.5W Po 10W RL = 4Ω RL = 4Ω RL = 2Ω RL = 2Ω 14 55 10 50 mV mV mV mV ELECTRICAL CHARACTERISTICS ( Vs = 14.4V,Tamb = 25 °C unless otherwise specified) DC TEST CIRCUIT AC TEST CIRCUIT 3/10 TDA2003 4/10 Figure 1. Quiescent output voltage vs. supply voltage Figure 2. Quiescent drain current vs. supply voltage Figure 3. Output power vs. supply voltage Symbol Parameter Test conditions Min. Typ. Max. Unit B Frequency response (-3 dB) Po = 1WRL = 4Ω 40 to 15,000 Hz d Distortion f = 1 kHz Po = 0.05 to4.5W RL = 4Ω Po = 0.05 to 7.5W RL = 2Ω 0.15 0.15 % % Ri Input resistance (pin 1) f = 1 kHz 70 150 kΩ Gv Voltage gain (open loop) f = 1 kHz f = 10 kHz 80 60 dB dB Gv Voltage gain (closed loop) f = 1 kHz RL = 4Ω 39.3 40 40.3 dB eN Input noise voltage (0) 1 5 µV iN Input noise current (0) 60 200 pA η Efficiency f = 1 Hz Po = 6W Po = 10W RL = 4Ω RL = 2Ω 69 65 % % SVR Supply voltage rejection f = 100 Hz Vripple = 0.5V Rg = 10 kΩ RL = 4Ω 30 36 dB ELECTRICAL CHARACTERISTICS (continued) (0) Filter with noise bandwidth:22 Hz to 22 kHz TDA2003 Figure 4. Output power vs. load resistance RL Figure 5. Gain vs. input sensivity Figure 6. Gain vs. input sensivity Figure 7. Distortion vs. output power Figure 8. Distortion vs. frequency Figure 9. Supply voltage rejection vs. voltage gain Figure 10. Supply voltage rejection vs. frequency Figure 11. Power dissipa- tion and efficiency vs.output power (RL = 4Ω) Figure 12. Power dissipa- tionand efficiencyvs.output power (RL = 2Ω) 5/10 TDA2003 6/10 Figure 13. Maximum power dissipation vs. supply voltage (sine wave operation) Figure 14. Maximum allowable power dissipation vs. ambient temperature Figure 15. Typical values of capacitor (CX) for different values of frequency reponse (B) Figure 16. Typical application circuit Figure 17. P.C. board and component layout for the circuit of fig. 16 (1 : 1 scale) APPLICATION INFORMATION BUILT-IN PROTECTION SYSTEMS Load dump voltage surge The TDA 2003 has a circuit which enables it to withstanda voltagepulse train, on pin 5, of the type shown in fig. 19. If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin 5, in order to assure that the pulses at pin 5 will be held within the limits shown in fig. 18. A suggested LC network is shown in fig. 19. With this network, a train of pulses with amplitude up to 120V and width of 2 ms can be applied at point A. This type of protection is ON when the supply voltage(pulsed or DC)exceeds18V.For thisreason the maximum operating supply voltage is 18V. TDA2003 Short-circuit (AC and DC conditions) The TDA 2003 can withstand a permanent short- circuit on the output for a supply voltage up to 16V. Polarity inversion High current (up to 5A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 1A fuse (normally con- nected in series with the supply). This feature is added to avoid destruction if, during fitting to the car, a mistakeon the connectionof the supply is made. Open ground When the radio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the TDA 2003 pro- tection diodes are included to avoid any damage. Inductive load A protectiondiode is provided betweenpin 4 and 5 (see the internal schematic diagram) to allow use of the TDA 2003 with inductive loads. In particular, the TDA 2003 can drive a coupling transformer for audio modulation. DC voltage The maximum operating DC voltage on the TDA 2003 is 18V. However the devicecan withstand a DC voltage up to 28V with no damage. This could occur during winter if two batteries were series connected to crank the engine. Thermal shut-down The presence of a thermal limitingcircuit offers the following advantages: 1) an overload on the output (even if it is perma- nent), oran excessive ambient temperature can be easily withstood. 2) the heat-sink can have a smaller factor com- pared with that of a conventionalcircuit. There is no device damage in the case of ex- cessive junction temperature: all that happens is thatPo (andthereforePtot) andId are reduced. Figure 20. Output power and dra in current vs . case temperature (RL = 4Ω) Figure 21. Output power and drain current vs . case temperature (RL = 2Ω) Figure 18. Figure 19. 7/10 TDA2003 Component Recommmended value Purpose Larger than recommended value Smaller than recommended value C1 C1 2.2 µF Input DCdecoupling Noise at switch-on, switch-off C2 470 µF Ripple rejection Degradation of SVR C3 0.1 µF Supply bypassing Danger of oscillation C4 1000 µF Output coupling to load Higher low frequency cutoff C5 0.1 µF Frequency stability Danger of oscillation at high frequencies with inductive loads CX ≅ 1 2 pi B R1 Upper frequency cutoff Lower bandwidth Larger bandwidth R1 (Gv-1) • R2 Setting of gain Increase of drain current R2 2.2 Ω Setting of gain and SVR Degradation of SVR R3 1 Ω Frequency stability Danger of oscillation at high frequencies with inductive loads RX ≅ 20 R2 Upper frequency cutoff Poor high frequency attenuation Danger of oscillation PRATICAL CONSIDERATION Printed circuit board The layout shown in fig. 17 is recommended. If different layouts are used, the ground points of input 1 and input 2 must be well decoupled from thegroundof the output throughwhicha ratherhigh current flows. Assembly suggestion No electrical insulation is required between the packageand the heat-sink.Pin length should be as short as possible.The soldering temperature must not exceed 260°C for 12 seconds. Application suggestions The recommended component values are those shown in the application circuits of fig.16. Different values can be used.The following table is intended to aid the car-radio designer. 8/10 TDA2003 Pentawatt V DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A 4.8 0.189 C 1.37 0.054 D 2.4 2.8 0.094 0.110 D1 1.2 1.35 0.047 0.053 E 0.35 0.55 0.014 0.022 E1 0.76 1.19 0.030 0.047 F 0.8 1.05 0.031 0.041 F1 1 1.4 0.039 0.055 G 3.2 3.4 3.6 0.126 0.134 0.142 G1 6.6 6.8 7 0.260 0.268 0.276 H2 10.4 0.409 H3 10.05 10.4 0.396 0.409 L 17.55 17.85 18.15 0.691 0.703 0.715 L1 15.55 15.75 15.95 0.612 0.620 0.628 L2 21.2 21.4 21.6 0.831 0.843 0.850 L3 22.3 22.5 22.7 0.878 0.886 0.894 L4 1.29 0.051 L5 2.6 3 0.102 0.118 L6 15.1 15.8 0.594 0.622 L7 6 6.6 0.236 0.260 L9 0.2 0.008 M 4.23 4.5 4.75 0.167 0.177 0.187 M1 3.75 4 4.25 0.148 0.157 0.167 V4 40° (typ.) L L1 A C L5 D1 L2 L3 E M1 MD H3 Dia. L7 L6 F1 H2 F G G1 E1 F E L9 V4 R R R RESIN BETWEEN LEADS H1 V3 H2 L8 V VV1 B V V V4 V4 OUTLINE AND MECHANICAL DATA 9/10 TDA2003 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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