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TDA7297

15+15W DUAL BRIDGE AMPLIFIER

WIDE SUPPLY VOLTAGE RANGE (6V -18V)

MINIMUM EXTERNAL COMPONENTS

– NO SVR CAPACITOR

– NO BOOTSTRAP

– NO BOUCHEROT CELLS

– INTERNALLY FIXED GAIN

STAND-BY & MUTE FUNCTIONS

SHORT CIRCUIT PROTECTION

THERMAL OVERLOAD PROTECTION

DESCRIPTION

The TDA7297 is a dual bridge amplifier specially

designed for TV and Portable Radio applications.

September 2003

Vref

ST-BY 7

IN1

0.22µF

133

D94AU175B

OUT1+

OUT1-

MUTE 6

IN2

0.22µF

OUT2+

OUT2-

S-GND

PW-GND

470µF 100nF

BLOCK AND APPLICATION DIAGRAM

Multiwatt 15

ORDERING NUMBER:

TDA7297

TECHNOLOGY BI20II

1/9

Downloaded from Arrow.com.

Summary of content (9 pages)

PAGE 1
TDA7297 ® 15+15W DUAL BRIDGE AMPLIFIER WIDE SUPPLY VOLTAGE RANGE (6V -18V) MINIMUM EXTERNAL COMPONENTS – NO SVR CAPACITOR – NO BOOTSTRAP – NO BOUCHEROT CELLS – INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION TECHNOLOGY BI20II Multiwatt 15 ORDERING NUMBER: TDA7297 DESCRIPTION The TDA7297 is a dual bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM VCC 470µF 3 0.
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TDA7297 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V VS Supply Voltage 20 IO Ptot Output Peak Current (internally limited) 2 A Total Power Dissipation (Tcase = 70°C) 33 W Top Operating Temperature 0 to 70 °C -40 to +150 °C Tstg, Tj Storage and Junction Temperature THERMAL DATA Symbol Rth j-case Description Value Thermal Resistance Junction to case Typ. 1.4 Unit Max. 2 °C/W PIN CONNECTION (Top view) 15 OUT2+ 14 OUT2- 13 VCC 12 IN2 11 N.C. 10 N.C.
PAGE 3
TDA7297 ELECTRICAL CHARACTERISTICS (Continued) Symbol VTMUTE VTST-BY IST-BY eN Parameter Mute Threshold St-by Threshold ST-BY current V6 = GND Total Output Noise Voltage Test Condition VO = -30dB Min. 2.3 0.8 A curve f = 20Hz to 20kHz APPLICATION SUGGESTION STAND-BY AND MUTE FUNCTIONS (A) Microprocessor Application In order to avoid annoying "Pop-Noise" during Turn-On/Off transients, it is necessary to guarantee the right St-by and mute signals sequence.
PAGE 4
TDA7297 Figure 2: Microprocessor Driving Signals. +VS(V) +18 VIN (mV) VST-BY pin 7 1.8 1.3 0.8 VMUTE pin 6 4.1 2.9 2.3 Iq (mA) VOUT (V) OFF ST-BY PLAY MUTE (B) Low Cost Application In low cost applications where the mP is not present, the suggested circuit is shown in fig.3. The St-by and mute terminals are tied together and they are connected to the supply line via an 4/9 Downloaded from Arrow.com. MUTE ST-BY OFF D96AU259 external voltage divider.
PAGE 5
TDA7297 Figure 3: Stand-alone Low-cost Application. VCC C3 0.22µF R1 47K IN1 ST-BY R2 47K 3 4 + 1 C1 470µF OUT1+ 2 OUT1- 15 OUT2+ 14 OUT2- 13 C2 100nF 7 C4 10µF S-GND 9 Vref C5 0.22µF 12 IN2 + + - MUTE PW-GND 6 8 + D95AU260A Figure 3b: PCB and Component Layout of the Application Circuit (Fig. 1). 5/9 Downloaded from Arrow.com.
PAGE 6
TDA7297 Figure 4: Distortion vs Output Power Figure 5: Distortion vs Output Power TH D(%) TH D (% ) 10 10 Vcc = 12 V R l = 8 o hm Vcc = 16.5V R l = 8 ohm 1 1 f = 15K H z f = 15KH z f = 5K H z f = 5K H z 0.1 0.1 f = 1K H z f = 1K H z 0.010 0.1 1 10 20 0.010 0.1 1 10 P ou t (W ) P out (W ) Figure 7: Frequency Respone Figure 6: Distortion vs Frequency Level(d B r) T H D (% ) 10 5.00 0 0 4.00 0 0 3.00 0 0 V cc = 16.5V R l = 8 o hm V c c = 1 6 .5 V Rl = 8 ohm Pou t = 1W 2.
PAGE 7
TDA7297 Figure 10: Mute Attenuation vs. V pin.6 Figure 11: Stand-By Attenuation vs Vpin.7 Attenuation (dB) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 1.5 2 2.5 3 3.5 4 4.5 5 Vpin.6(V) Attenuation (dB) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 Vpin.7 (V) Figure 12: Quiscent Current vs.
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TDA7297 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 0.063 1 0.039 E 0.49 0.55 0.019 0.022 F 0.66 0.75 0.026 0.030 G 1.02 1.27 1.52 0.040 0.050 0.060 G1 17.53 17.78 18.03 0.690 0.700 0.710 H1 19.6 0.772 H2 20.2 0.795 L 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.870 0.886 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 0.713 L7 2.65 2.
PAGE 9
TDA7297 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.