TBA820M

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 connected to the supply voltage Figure 2. Circuit diagram with load connected to ground * Capacitor C6 must be used when high ripple rejection is requested. September 2003 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 RL = 8Ω RL = 4Ω RL = 8Ω RL = 4Ω RL = 4Ω 0.9 CB = 680 pF 25 to 7,000 CB = 220 pF 25 to 20,000 Hz Po = 500 mW RL = 8Ω f = 1 kHz Rf = 33Ω 0.8 Rf = 120Ω 0.4 % Gv Voltage gain (open loop) f = 1 kHz RL = 8Ω 75 Gv Voltage gain (closed loop) RL = 8Ω Rf = 33Ω 45 f = 1 kHz Rf = 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 di s si pa ti on (sine wave operation) Figure 7. Suggested value of CB vs. Rf Fi gure 8. Frequency 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 mm inch DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 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 0.020 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 OUTLINE AND MECHANICAL DATA 3.81 1.52 0.125 0.150 Minidip 0.060 5/6 TBA820M 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. Specifications 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. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2003 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia – Belgium - Brazil - Canada - China – Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com 6/6