TBA820M 1.2W AUDIO AMPLIFIER DESCRIPTION The TBA820M is a monolithic integrated audio amplifier in a 8 lead dual in-line plastic package. It is intended for use as low frequency class B power amplifier with wide range of supply voltage: 3 to 16V, in portable radios, cassette recorders and players etc. Main features are: minimum working supply voltage of 3V, low quiescent current, low number of external components, good ripple rejection, no cross-over distortion, low power dissipation. Output power: Po = 2W at 12V/8Ω, 1.6W at 9V/4Ω and 1.2W at 9V/8Ω. Minidip ORDERING NUMBER: TBA820M ABSOLUTE MAXIMUM RATINGS Symbol Value Unit Vs Supply voltage Parameter 16 V Io Output peak current 1.5 A Ptot Power dissipation at Tamb = 50°C 1 W Tstg, Tj Storage and junction temperature -40 to 150 °C TEST AND APPLICATION CIRCUITS Figure 1. Circuit diagram with load connectedto the supply voltage Figure 2. Circuit diagram with load connected to ground * Capacitor C6 must be used when high ripple rejection is requested. June 1988 1/6 TBA820M PIN CONNECTION (top view) SCHEMATIC DIAGRAM THERMAL DATA Symbol Rth-j-amb 2/6 Parameter Thermal resistance junction-ambient max Value Unit 100 °C/W TBA820M ELECTRICAL CHARACTERISTICS (Refer to the test circuits Vs = 9V, Tamb = 25 °C unless otherwise specified) Symbol Parameter Test conditions Min. Vs Supply voltage 3 Vo Quiescent output voltage (pin 5) 4 Id Quiescent drain current Ib Bias current (pin 3) Po Output power d = 10% Rf = 120Ω Vs = 12V Vs = 9V Vs = 9V Vs = 6V Vs = 3.5V Ri Input resistance (pin 3) f = 1 kHz B Frequency response (-3 dB) RL = 8Ω C5 = 1000 µF Rf = 120Ω d Distortion Typ. Max. Unit 16 V 4.5 5 V 4 12 mA 0.1 µA 2 1.6 1.2 0.75 0.25 W W W W W 5 MΩ f = 1 kHz R L = 8Ω R L = 4Ω R L = 8Ω R L = 4Ω R L = 4Ω 0.9 C B = 680 pF 25 to 7,000 C B = 220 pF 25 to 20,000 Hz Po = 500 mW RL = 8Ω f = 1 kHz R f = 33Ω 0.8 R f = 120Ω 0.4 % Gv Voltage gain (open loop) f = 1 kHz R L = 8Ω 75 Gv Voltage gain (closed loop) RL = 8Ω R f = 33Ω 45 f = 1 kHz R f = 120Ω 34 dB dB eN Input noise voltage (*) 3 µV iN Input noise current (*) 0.4 nA S+N N Signal to noise ratio (*) SVR Supply voltage rejection (test circuit of fig. 2) Po = 1.2W RL = 8Ω Gv = 34 dB RL = 8Ω f(ripple) = 100 Hz C6 = 47 µF Rf = 120Ω R1 = 10KΩ 80 R1 = 50 kΩ 70 dB 42 dB (*) B = 22 Hz to 22 KHz 3/6 TBA820M Figure 3. Output power vs. supply voltage Figure 4. Harmonic distortion vs. output power Figure 5. Power dissipation and efficiency vs. output power Figure 6. Maximum power d i ss i p ati on (s i ne wa ve operation) Figure 7. Suggested value of CB vs. Rf Figur e 8. Frequ ency response Figure 9. Harmonic distortion vs. frequency Figure 10. Supply voltage rejection (Fig. 2 circuit) Figure 11. Quiescent current vs. supply voltage 4/6 TBA820M MINIDIP PACKAGE MECHANICAL DATA mm DIM. MIN. A TYP. inch MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 0.020 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 3.18 3.81 1.52 0.125 0.150 0.060 5/6 TBA820M Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in 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 express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 6/6