Руководство по эксплуатации Philips TDA8944J

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TDA8944J
2 x 7 W stereo Bridge Tied Load (BTL) audio amplifier
Rev. 02 — 14 February 2000 Product specification
1. General description
The TDA8944J is a dual-channel audio power amplifier with an output power of
2 × 7 W at an 8 Ω load and a 12 V supply. The circuit contains two Bridge Tied Load
(BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J
comes in a 17-pin DIL-bent-SIL (DBS) power package. The TDA8944J is
printed-circuit board (PCB) compatible with all other typ

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Table 1: Quick reference data…continued Symbol Parameter Conditions Min Typ Max Unit P output power THD = 10%; R =8 Ω; 67- W o L V =12V CC THD total harmonic distortion P = 1 W - 0.03 0.1 % o G voltage gain 31 32 33 dB v SVRR supply voltage ripple 50 65 - dB rejection 5. Ordering information Table 2: Ordering information Type number Package Name Description Version TDA8944J DBS17P plastic DIL-bent-SIL power package; SOT243-1 17 le

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 7. Pinning information 7.1 Pinning handbook, halfpage OUT1- 1 GND1 2 V 3 CC1 OUT1+ 4 n.c. 5 IN1+ 6 n.c. 7 IN1- 8 IN2- 9 TDA8944J MODE 10 SVR 11 IN2+ 12 n.c. 13 OUT2- 14 GND2 15 V 16 CC2 OUT2+ 17 MBK936 Fig 2. Pin configuration. 7.2 Pin description Table 3: Pin description Symbol Pin Description OUT1- 1 negative loudspeaker terminal 1 GND1 2 ground channel 1 V 3 supply voltage channel 1 CC1 OUT1+ 4 positive loudspeaker terminal 1 n.

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Table 3: Pin description…continued Symbol Pin Description n.c. 13 not connected OUT2- 14 negative loudspeaker terminal 2 GND2 15 ground channel 2 V 16 supply voltage channel 2 CC2 OUT2+ 17 positive loudspeaker terminal 2 8. Functional description The TDA8944J is a stereo BTL audio power amplifier capable of delivering 2 × 7W output power to an 8 Ω load at THD = 10%, using a 12 V power supply and an external heatsink. The voltage ga

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 8.2 Power amplifier The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output stage, capable of delivering a peak output current of 2 A. The BTL principle offers the following advantages: Lower peak value of the supply current • • The ripple frequency on the supply voltage is twice the signal frequency No expensive DC-blocking capacitor • • Good low frequency performance. 8.2.1 Output power measurement The outp

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Mute — In this mode the amplifier is DC-biased but not operational (no audio output); the DC level of the input and output pins remain on half the supply voltage. This allows the input coupling and Supply Voltage Ripple Rejection (SVRR) capacitors to be charged to avoid pop-noise. The device is in mute mode when 3V

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 9. Limiting values Table 5: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit V supply voltage no signal - 0.3 +25 V CC operating - 0.3 +18 V V input voltage - 0.3 V + 0.3 V I CC I repetitive peak output current - 2 A ORM T storage temperature non-operating - 55 +150 °C stg T operating ambient temperature - 40 +85 °C amb P total power dissipation - 18 W tot

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL955 MGL954 50 50 handbook, halfpage handbook, halfpage I I q q (mA) (mA) 40 40 30 30 20 20 V = 12 V CC 10 10 0 0 04 8 12 16 20 04 8 12 16 20 V (V) V (V) CC MODE Fig 3. Quiescent current as function of supply Fig 4. Quiescent current as function of mode voltage. voltage. 12. Dynamic characteristics Table 8: Dynamic characteristics V =12V; T =25 °C; R =8 Ω; f = 1 kHz; V = 0 V; measured in test circuit Figure 14; audio pass band C

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL957 10 handbook, full pagewidth V o (V) 1 - 1 10 - 2 10 - 3 10 - 4 10 V = 12 V CC - 5 10 0 4 8 12 16 20 V (V) MODE Fig 5. Output voltage as function of mode voltage. MGL952 2 MGL953 10 10 handbook, halfpage handbook, halfpage THD THD (%) (%) 10 V = 12 V CC 1 P = 0.1 W o 1 1 W - 1 10 - 1 10 - 2 10 - 2 10 - 2 - 1 2 10 10 1 10 10 2 3 4 5 10 10 10 10 10 P (W) o f (Hz) No bandpass filter applied. Fig 6. Total harmonic distortion as f

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL959 MGL960 20 20 handbook, halfpage handbook, halfpage P P o tot (W) (W) 16 16 12 12 R = 8 Ω R = 8 Ω L L 8 8 16 Ω 16 Ω 4 4 0 0 04 8 12 16 20 04 8 12 16 20 V (V) V (V) CC CC THD = 10%. Fig 8. Output power as function of supply voltage. Fig 9. Total power dissipation as function of supply voltage. MGL962 MGL961 100 10 handbook, halfpage handbook, halfpage P η (%) (W) R = 8 Ω 80 8 L R = 16 Ω L 60 6 8 Ω 16 Ω 40 4 20 2 0 0 02 4 6 8

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL958 0 handbook, halfpage α cs (dB) - 20 - 40 - 60 - 80 - 100 2 3 4 5 10 10 10 10 10 f (Hz) No bandpass filter applied. Fig 12. Channel separation as function of frequency. MGL956 0 handbook, full pagewidth SVRR (dB) - 20 - 40 B CH2 - 60 CH1 A - 80 2 3 4 5 10 10 10 10 10 f (Hz) V = 12 V; R =0 Ω; V = 707 mV (peak-to-peak); no bandpass filter applied. CC s ripple Curves A: inputs short-circuited Curves B: inputs short-circuited and

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 13. Internal circuitry Table 9: Internal circuitry Pin Symbol Equivalent circuit 6 and 8 IN1+ and IN1- V CC 12 and 9 IN2+ and IN2- V V CC CC 1.5 kΩ 1.5 kΩ 8, 9 6, 12 45 kΩ 45 kΩ 1/2 V CC 1 : 1 1 : 1 (SVR) MGL946 1 and 4 OUT1- and OUT1+ 14 and 17 OUT2- and OUT2+ 100 Ω 1, 4, 14, 17 40 Ω 1/2 V CC MGL947 10 MODE V CC V CC 1 kΩ 1 kΩ 10 kΩ V CC 10 kΩ 10 OFF MUTE HIGH HIGH MGL949 11 SVR V CC Standby 20 kΩ 11 20 kΩ MGL948 9397 750 06861 ©

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 14. Application information +V CC 100 nF 1000 μF 3 16 R 220 nF IN1- 8 s - R 1 OUT1- i Symmetrical C i 45 kΩ + input - 1.5 + R 1/2 V L - CC 1/2 V nF CC + 8 Ω 220 nF R i + 4 OUT1+ 45 kΩ 220 nF R s 6 - IN1+ Asymmetrical C TDA8944J i input IN2- 9 220 nF - R 14 OUT2- i signal 45 kΩ + - GND 1.5 + R 1/2 V L CC - 1/2 V nF CC + 8 Ω R i + 17 OUT2+ 45 kΩ V 12 CC - IN2+ V CC R MODE 10 STANDBY/ MUTE LOGIC 20 kΩ R SHORT CIRCUIT C1 AND 1/2 V SVR

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 54 mm idth 56 mm OUT2- ON MUTE OUT2+ +- 10 μF 17 IN2- 220 nF IN2+ 1.5 nF IN1- IN1+ 220 nF V CC 1 OUT1- 100 nF 1000 μF GND OUT1+ MGL951 Fig 15. Printed-circuit board layout (single-sided); components view. 14.1.2 Power supply decoupling Proper supply bypassing is critical for low-noise performance and high supply voltage ripple rejection. The respective capacitor locations should be as close as possible to the device and grounded t

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 14.2 Thermal behaviour and heatsink calculation The measured maximum thermal resistance of the IC package, R is 6.9 K/W. th(j-mb) A calculation for the heatsink can be made, with the following parameters: T =50 °C amb(max) V = 12 V and R =8 Ω CC L T = 150 °C. j(max) R is the total thermal resistance between the junction and the ambient th(tot) including the heatsink. In the heatsink calculations the value of R is ignored. th(mb-h)

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 16. Package outline DBS17P: plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1 non-concave D h x D E h view B: mounting base side d A 2 B j E A L 3 L Q c v M 117 e m e 1 w M Z 2 b p e 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) (1) (1) (1) UNIT A A b cDde D E e e E j LL m Q v w x Z 2 p h 1 2 h 3 17.0 4.6 0.75 0.48 24.0 20.0 12.2 3.4 12.4 2.4 2.1 2.00 6 mm 10 2.54 1.27 5.08 4.3 0.8 0.4 0.03 15

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 17. Soldering 17.1 Introduction to soldering through-hole mount packages This text gives a brief insight to wave, dip and manual soldering. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages (document order number 9398 652 90011). Wave soldering is the preferred method for mounting of through-hole mount IC packages on a printed-circuit board. 17.2 Soldering by dipping or by

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 18. Revision history Table 11: Revision history Rev Date CPCN Description 02 000214 - Product specification; second version; supersedes initial version TDA8944J-01 of 14 April 1999 (9397 750 04881). Modifications: Table 1 on page 1: SVRR; Typ value 65 dB → added • • Figure 1 on page 2: Block diagram; pin numbers changed OUT2-→ 14 and OUT2+ → 17 Figure 2 on page 3: Pin configuration; pin numbers changed OUT2-→ 14 and OUT2+ → 17 • • Se

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 19. Data sheet status [1] Datasheet status Product status Definition Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to mak

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TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Philips Semiconductors - a worldwide company Argentina: see South America Netherlands: Tel. +31 40 278 2785, Fax. +31 40 278 8399 Australia: Tel. +61 2 9704 8141, Fax. +61 2 9704 8139 New Zealand: Tel. +64 98 49 4160, Fax. +64 98 49 7811 Austria: Tel. +43 160 101, Fax. +43 160 101 1210 Norway: Tel. +47 22 74 8000, Fax. +47 22 74 8341 Belarus: Tel. +375 17 220 0733, Fax. +375 17 220 0773 Philippines: Tel. +63 28 16 6380, Fax. +63 2