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 types in the TDA894x family. One PCB footprint accommodates both the mono and the stereo products. 2. Features c c ■ ■ ■ ■ ■ ■ ■ ■ ■ Few external components Fixed gain Standby and mute mode No on/off switching plops Low standby current High supply voltage ripple rejection Outputs short-circuit protected to ground, supply and across the load Thermally protected Printed-circuit board compatible. 3. Applications ■ Mains fed applications (e.g. TV sound) ■ PC audio ■ Portable audio. 4. Quick reference data Table 1: Quick reference data Symbol Parameter VCC supply voltage Iq quiescent supply current Istb standby supply current Conditions VCC = 12 V; RL = ∞ Min Typ Max Unit 6 12 18 V - 24 36 mA - - 10 µA TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Table 1: Quick reference data…continued Symbol Parameter Conditions Min Typ Max Unit Po output power THD = 10%; RL = 8 Ω; VCC = 12 V 6 7 - W THD total harmonic distortion Po = 1 W - 0.03 0.1 % Gv voltage gain 31 32 33 dB SVRR supply voltage ripple rejection 50 65 - dB 5. Ordering information Table 2: Ordering information Type number Package Name Description Version TDA8944J DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1 6. Block diagram idth VCC1 VCC2 3 16 1 IN1− IN1+ OUT1− 8 6 4 OUT1+ TDA8944J 14 IN2− IN2+ OUT2− 9 12 17 OUT2+ VCC MODE SVR 10 STANDBY/ MUTE LOGIC 20 kΩ SHORT CIRCUIT AND TEMPERATURE PROTECTION 11 20 kΩ 2 15 MBK933 GND1 GND2 Fig 1. Block diagram. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 2 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 7. Pinning information 7.1 Pinning handbook, halfpage OUT1− 1 GND1 2 VCC1 3 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 VCC2 16 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 VCC1 3 supply voltage channel 1 OUT1+ 4 positive loudspeaker terminal 1 n.c. 5 not connected IN1+ 6 positive input 1 n.c. 7 not connected IN1− 8 negative input 1 IN2− 9 negative input 2 MODE 10 mode selection input (standby, mute, operating) SVR 11 half supply voltage decoupling (ripple rejection) IN2+ 12 positive input 2 © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 3 of 21 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 VCC2 16 supply voltage channel 2 OUT2+ 17 positive loudspeaker terminal 2 8. Functional description The TDA8944J is a stereo BTL audio power amplifier capable of delivering 2 × 7 W output power to an 8 Ω load at THD = 10%, using a 12 V power supply and an external heatsink. The voltage gain is fixed at 32 dB. With the three-level MODE input the device can be switched from ‘standby’ to ‘mute’ and to ‘operating’ mode. The TDA8944J outputs are protected by an internal thermal shutdown protection mechanism and a short-circuit protection. 8.1 Input configuration The TDA8944J inputs can be driven symmetrical (floating) as well as asymmetrical. In the asymmetrical mode one input pin is connected via a capacitor to the signal ground which should be as close as possible to the SVR (electrolytic) capacitor ground. Note that the DC level of the input pins is half of the supply voltage VCC, so coupling capacitors for both pins are necessary. The input cut-off frequency is: 1 f i ( cut – off ) = ------------------------------2 – ( Ri × C i ) (1) For Ri = 45 kΩ and Ci = 220 nF: 1 f i ( cut – off ) = ------------------------------------------------------------------ = 16 Hz 3 –9 2 – ( 45 × 10 × 220 × 10 ) (2) As shown in Equation 1 and 2, large capacitor values for the inputs are not necessary; so the switch-on delay during charging of the input capacitors, can be minimized. This results in a good low frequency response and good switch-on behaviour. Remark: To prevent HF oscillations do not leave the inputs open, connect a capacitor of at least 1.5 nF across the input pins close to the device. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 4 of 21 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: • • • • 8.2.1 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. Output power measurement The output power as a function of the supply voltage is measured on the output pins at THD = 10%; see Figure 8. The maximum output power is limited by the maximum supply voltage of 12 V and the maximum available output current: 2 A repetitive peak current. 8.2.2 Headroom Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom – compared to the average power output – for transferring the loudest parts without distortion. At VCC = 12 V, RL = 8 Ω and Po = 4 W at THD = 0.1% (see Figure 6), the Average Listening Level (ALL) – music power – without any distortion yields: Po(ALL) = 4 W/15.85 = 252 mW. The power dissipation can be derived from Figure 11 on page 10 for 0 dB respectively 12 dB headroom. Table 4: Power rating as function of headroom Headroom Power output (THD = 0.1%) Power dissipation (P) 0 dB Po = 4 W 8W 12 dB Po(ALL) = 252 mW 4W For the average listening level a power dissipation of 4 W can be used for a heatsink calculation. 8.3 Mode selection The TDA8944J has three functional modes, which can be selected by applying the proper DC voltage to pin MODE. See Figure 4 and 5 for the respective DC levels, which depend on the supply voltage level. The MODE pin can be driven by a 3-state logic output stage: e.g. a microcontroller with additional components for DC-level shifting. Standby — In this mode the current consumption is very low and the outputs are floating. The device is in standby mode when (VCC − 0.5 V) < VMODE < VCC, or when the MODE pin is left floating (high impedance). The power consumption of the TDA8944J will be reduced to <0.18 mW. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 5 of 21 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 3 V < VMODE < (VCC − 1.5 V). Operating — In this mode the amplifier is operating normally. The operating mode is activated at VMODE < 0.5 V. 8.3.1 Switch-on and switch-off To avoid audible plops during supply voltage switch-on or switch-off, the device is set to standby mode before the supply voltage is applied (switch-on) or removed (switch-off). The switch-on and switch-off time can be influenced by an RC-circuit on the MODE pin. Rapid on/off switching of the device or the MODE pin may cause ‘click- and pop-noise’. This can be prevented by proper timing of the RC-circuit on the MODE pin. 8.4 Supply Voltage Ripple Rejection (SVRR) The SVRR is measured with an electrolytic capacitor of 10 µF on pin SVR at a bandwidth of 10 Hz to 80 kHz. Figure 13 on page 11 illustrates the SVRR as function of the frequency. A larger capacitor value on the SVR pin improves the ripple rejection behaviour at the lower frequencies. 8.5 Built-in protection circuits The TDA8944J contains two types of protection circuits, i.e. short-circuit and thermal shutdown. 8.5.1 Short-circuit protection Short-circuit to ground or supply line — This is detected by a so-called ‘missing current’ detection circuit which measures the current in the positive supply line and the current in the ground line. A difference between both currents larger than 0.4 A, switches the power stage to standby mode (high impedance). Short-circuit across the load — This is detected by an absolute-current measurement. An absolute-current larger than 2 A, switches the power stage to standby mode (high impedance). 8.5.2 Thermal shutdown protection The junction temperature is measured by a temperature sensor; at a junction temperature of approximately 150 °C this detection circuit switches the power stage to standby mode (high impedance). © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 6 of 21 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 VCC supply voltage no signal −0.3 +25 V operating −0.3 +18 V VI input voltage −0.3 VCC + 0.3 V IORM repetitive peak output current - 2 A Tstg storage temperature −55 +150 °C Tamb operating ambient temperature −40 +85 °C Ptot total power dissipation - 18 W VCC(sc) supply voltage to guarantee short-circuit protection - 15 V non-operating 10. Thermal characteristics Table 6: Thermal characteristics Symbol Parameter Conditions Value Unit Rth(j-a) thermal resistance from junction to ambient in free air 40 K/W Rth(j-mb) thermal resistance from junction to mounting base both channels driven 6.9 K/W 11. Static characteristics Table 7: Static characteristics VCC = 12 V; Tamb = 25 °C; RL = 8 Ω; VMODE = 0 V; Vi = 0 V; measured in test circuit Figure 14; unless otherwise specified. Symbol Parameter Conditions VCC supply voltage operating Iq quiescent supply current RL = ∞ Istb standby supply current VMODE = VCC VO DC output voltage ∆VOUT [3] VMODE IMODE [1] [2] [3] [2] differential output voltage offset mode selection input voltage mode selection input current [1] operating mode Min Typ Max Unit 6 12 18 V - 24 36 mA - - 10 µA - 6 - V - - 200 mV 0 - 0.5 V mute mode 3 - VCC − 1.5 V standby mode VCC − 0.5 - VCC V 0 < VMODE < VCC - - 20 µA With a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal to the differential output voltage offset (∆VOUT) divided by the load resistance (RL). The DC output voltage with respect to ground is approximately 0.5VCC. ∆VOUT = VOUT+ − VOUT− © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 7 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL954 50 Iq (mA) (mA) 40 40 30 30 20 20 10 10 0 0 MGL955 50 Iq handbook, halfpage handbook, halfpage VCC = 12 V 4 8 12 0 0 20 16 VCC (V) Fig 3. Quiescent current as function of supply voltage. 4 8 12 20 16 VMODE (V) Fig 4. Quiescent current as function of mode voltage. 12. Dynamic characteristics Table 8: Dynamic characteristics VCC = 12 V; Tamb = 25 °C; RL = 8 Ω; f = 1 kHz; VMODE = 0 V; measured in test circuit Figure 14; audio pass band 22 Hz to 22 kHz; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Po output power THD = 10% 6 7 - W THD = 0.5% 4 5 - W Po = 1 W - 0.03 0.1 % THD total harmonic distortion Gv voltage gain 31 32 33 dB Zi(dif) differential input impedance 70 90 110 kΩ Vn(o) noise output voltage [1] - 90 120 µV supply voltage ripple rejection fripple = 1 kHz [2] 50 65 - dB fripple = 100 Hz to 20 kHz [2] - 60 - dB [3] - - 50 µV 50 75 - dB SVRR Vo(mute) output voltage mute mode αcs channel separation Rs = 0 Ω [1] [2] [3] The noise output voltage is measured at the output in a frequency range from 20 Hz to 20 kHz (unweighted), with a source impedance Rs = 0 Ω at the input. Supply voltage ripple rejection is measured at the output, with a source impedance Rs = 0 Ω at the input. The ripple voltage is a sine wave with a frequency fripple and an amplitude of 707 mV (RMS), which is applied to the positive supply rail. Output voltage in mute mode is measured with an input voltage of 1 V (RMS) in a bandwidth of 20 kHz, so including noise. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 8 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL957 10 handbook, full pagewidth Vo (V) 1 10−1 10−2 10−3 10−4 VCC = 12 V 10−5 0 4 8 12 16 20 VMODE (V) Fig 5. Output voltage as function of mode voltage. MGL952 102 handbook, halfpage MGL953 10 handbook, halfpage THD (%) THD (%) 10 VCC = 12 V 1 Po = 0.1 W 1 1W 10−1 10−1 10−2 10−2 10−1 1 10 Po (W) 102 10−2 10 102 103 104 f (Hz) 105 No bandpass filter applied. Fig 6. Total harmonic distortion as function of output power. Fig 7. Total harmonic distortion as function of frequency. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 9 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL959 20 handbook, halfpage MGL960 20 handbook, halfpage Po (W) 16 Ptot (W) 16 12 12 RL = 8 Ω 8 RL = 8 Ω 8 16 Ω 16 Ω 4 0 0 4 4 8 12 0 16 20 VCC (V) 0 4 8 12 16 20 VCC (V) THD = 10%. Fig 8. Output power as function of supply voltage. MGL962 100 Fig 9. Total power dissipation as function of supply voltage. MGL961 10 handbook, halfpage handbook, halfpage η P (%) (W) 8 80 RL = 8 Ω RL = 16 Ω 6 60 8Ω 40 4 20 2 0 0 2 4 6 10 8 0 0 16 Ω 2 4 6 8 10 Po (W) Po (W) VCC = 12 V. Fig 10. Efficiency as function of output power. Fig 11. Power dissipation as function of output power. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 10 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier MGL958 0 handbook, halfpage αcs (dB) −20 −40 −60 −80 −100 10 102 103 104 f (Hz) 105 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 10 102 103 104 f (Hz) 105 VCC = 12 V; Rs = 0 Ω; Vripple = 707 mV (peak-to-peak); no bandpass filter applied. Curves A: inputs short-circuited Curves B: inputs short-circuited and connected to ground (asymmetrical application) Fig 13. Supply voltage ripple rejection as function of frequency. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 11 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 13. Internal circuitry Table 9: Internal circuitry Pin Symbol 6 and 8 IN1+ and IN1− 12 and 9 IN2+ and IN2− Equivalent circuit VCC VCC 1.5 kΩ 1.5 kΩ 45 kΩ 45 kΩ VCC 8, 9 6, 12 1/2 VCC 1:1 1 and 4 OUT1− and OUT1+ 14 and 17 OUT2− and OUT2+ 1:1 (SVR) MGL946 100 Ω 1, 4, 14, 17 40 Ω 1/2 VCC MGL947 10 MODE VCC VCC 1 kΩ 10 kΩ VCC 1 kΩ 10 kΩ 10 MUTE HIGH OFF HIGH MGL949 11 SVR VCC Standby 20 kΩ 11 20 kΩ MGL948 © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 12 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 14. Application information +VCC 100 nF 3 Rs 220 nF Symmetrical input Ci 16 IN1− 8 − Ri 45 kΩ 1.5 nF − 1/2 VCC 220 nF + Ri 45 kΩ 220 nF Rs 1000 µF 1 OUT1− + + − RL 8Ω 1/2 VCC + 6 4 OUT1+ − IN1+ Asymmetrical Ci input TDA8944J IN2− 9 220 nF − Ri 45 kΩ signal GND 1.5 nF − 1/2 VCC VCC 12 + Ri 45 kΩ signal GND C2 MODE C1 C2 Standby Mute On 0 0 1 0 1 0 17 OUT2+ VCC STANDBY/ MUTE LOGIC 20 kΩ R MICROCONTROLLER RL 8Ω 1/2 VCC − IN2+ C1 + − + R MODE 10 14 OUT2− + SHORT CIRCUIT AND TEMPERATURE PROTECTION 1/2 VCC SVR 11 10 µF 20 kΩ 2 15 GND full pagewidth MGL950 Fig 14. Application diagram. 14.1 Printed-circuit board (PCB) 14.1.1 Layout and grounding For a high system performance level certain grounding techniques are essential. The input reference grounds have to be tied with their respective source grounds and must have separate tracks from the power ground tracks; this will prevent the large (output) signal currents from interfering with the small AC input signals. The small-signal ground tracks should be physically located as far as possible from the power ground tracks. Supply and output tracks should be as wide as possible for delivering maximum output power. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 13 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 54 mm idth 56 mm OUT2− ON MUTE OUT2+ + − 10 µF 17 220 nF IN2− IN2+ 1.5 nF 220 nF IN1− IN1+ VCC 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 to the power ground. Proper power supply decoupling also prevents oscillations. For suppressing higher frequency transients (spikes) on the supply line a capacitor with low ESR – typical 100 nF – has to be placed as close as possible to the device. For suppressing lower frequency noise and ripple signals, a large electrolytic capacitor – e.g. 1000 µF or greater – must be placed close to the device. The bypass capacitor on the SVR pin reduces the noise and ripple on the midrail voltage. For good THD and noise performance a low ESR capacitor is recommended. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 14 of 21 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, Rth(j-mb) is 6.9 K/W. A calculation for the heatsink can be made, with the following parameters: Tamb(max) = 50 °C VCC = 12 V and RL = 8 Ω Tj(max) = 150 °C. Rth(tot) is the total thermal resistance between the junction and the ambient including the heatsink. In the heatsink calculations the value of Rth(mb-h) is ignored. At VCC = 12 V and RL = 8 Ω the measured worstcase sine-wave dissipation is 8 W; see Figure 11. For Tj(max) = 150 °C the temperature raise - caused by the power dissipation - is: 150 – 50 = 100 °C. P × Rth(tot) = 100 °C Rth(tot) = 100/8 = 12.5 K/W Rth(h-a) = Rth(tot) – Rth(j-mb) = 12.5 – 6.9 = 5.6 K/W. The calculation above is for an application at worstcase (stereo) sine-wave output signals. In practice music signals will be applied, which decreases the maximum power dissipation to approximately half of the sine-wave power dissipation (see Section 8.2.2). This allows for the use of a smaller heatsink: P × Rth(tot) = 100 °C Rth(tot) = 100/4 = 25 K/W Rth(h-a) = Rth(tot) – Rth(j-mb) = 25 – 6.9 = 18.1 K/W. To increase the lifetime of the IC, Tj(max) should be reduced to 125 °C. This requires a heatsink of approximately 12 K/W for music signals. 15. Test information 15.1 Quality information The General Quality Specification for Integrated Circuits, SNW-FQ-611D is applicable. 15.2 Test conditions Tamb = 25 °C; VCC = 12 V; f = 1 kHz; RL = 8 Ω; audio pass band 22 Hz to 22 kHz; unless otherwise specified. Remark: In the graphs as function of frequency no bandpass filter was applied; see Figure 7, 12 and 13. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 15 of 21 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 Dh x D Eh view B: mounting base side d A2 B j E A L3 L Q c 1 v M 17 e1 Z bp e e2 m w M 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A A2 bp c D (1) d Dh E (1) e mm 17.0 15.5 4.6 4.4 0.75 0.60 0.48 0.38 24.0 23.6 20.0 19.6 10 12.2 11.8 2.54 e1 e2 1.27 5.08 Eh j L L3 m Q v w x Z (1) 6 3.4 3.1 12.4 11.0 2.4 1.6 4.3 2.1 1.8 0.8 0.4 0.03 2.00 1.45 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE 97-12-16 99-12-17 SOT243-1 Fig 16. DBS17P package outline. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 16 of 21 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 solder wave The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 17.3 Manual soldering Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds. 17.4 Package related soldering information Table 10: Suitability of through-hole mount IC packages for dipping and wave soldering methods Package Soldering method DBS, DIP, HDIP, SDIP, SIL [1] Dipping Wave suitable suitable [1] For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 17 of 21 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 Section 8 “Functional description”: – Section 8.1 “Input configuration” on page 4 → added. – Section 8.2 “Power amplifier” on page 5: ........, capable of delivering a peak output current of 1.5 A → changed to 2 A. – Section 8.2.1 “Output power measurement” on page 5 → added – Section 8.2.2 “Headroom” on page 5 → added • Section 8.3 “Mode selection”: – Standby mode: VMODE > (VCC − 0.5 V) → changed to (VCC − 0.5 V) < VMODE < VCC; The power consumption of the TDA8944J will be reduced to <0.18 mW → added. – Mute mode: the DC level of the input and output pins remain on half the supply voltage → added; – 2.5 V < VMODE < (VCC − 1.5 V) → changed to 3 V < VMODE < (VCC − 1.5 V) – Section 8.3.1 “Switch-on and switch-off” on page 6 • • • Section 8.4 “Supply Voltage Ripple Rejection (SVRR)” on page 6 → added Section 8.5 “Built-in protection circuits” on page 6 → added Table 5 on page 7: – Ptot value added 18 V – VCC(sc) value added 15 V • Table 6 on page 7: – Rth(j-a) value added 40 K/W – Rth(j-c) value 10 → changed to 6.9 K/W; condition ‘in free air’ → changed to ‘both channels driven’ • • Table 7 on page 7: VMODE - mute mode - value Min 2.5 → changed to 3 V Table 8 on page 8: – SVRR; Typ values 65 and 60 dB → added – αcs; Typ value 75 dB → added • • • • • • • 01 990414 - Figure 3 to 13: figures added Section 13 “Internal circuitry” on page 12: → added Figure 14: figure adjusted Section 14.1 “Printed-circuit board (PCB)” on page 13: → added Figure 15: figure added Section 14.2 “Thermal behaviour and heatsink calculation” on page 15: → added Section 15.2 “Test conditions” on page 15: → added Preliminary specification; initial version. © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 18 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier 19. Data sheet status Datasheet status Product status Definition [1] 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 make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued data sheet before initiating or completing a design. 20. Definitions 21. Disclaimers Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. © Philips Electronics N.V. 2000 All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 19 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Philips Semiconductors - a worldwide company Argentina: see South America Australia: Tel. +61 2 9704 8141, Fax. +61 2 9704 8139 Austria: Tel. +43 160 101, Fax. +43 160 101 1210 Belarus: Tel. +375 17 220 0733, Fax. +375 17 220 0773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Tel. +359 268 9211, Fax. +359 268 9102 Canada: Tel. +1 800 234 7381 China/Hong Kong: Tel. +852 2 319 7888, Fax. +852 2 319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Tel. +45 3 288 2636, Fax. +45 3 157 0044 Finland: Tel. +358 961 5800, Fax. +358 96 158 0920 France: Tel. +33 14 099 6161, Fax. +33 14 099 6427 Germany: Tel. +49 40 23 5360, Fax. +49 402 353 6300 Hungary: see Austria India: Tel. +91 22 493 8541, Fax. +91 22 493 8722 Indonesia: see Singapore Ireland: Tel. +353 17 64 0000, Fax. +353 17 64 0200 Israel: Tel. +972 36 45 0444, Fax. +972 36 49 1007 Italy: Tel. +39 039 203 6838, Fax +39 039 203 6800 Japan: Tel. +81 33 740 5130, Fax. +81 3 3740 5057 Korea: Tel. +82 27 09 1412, Fax. +82 27 09 1415 Malaysia: Tel. +60 37 50 5214, Fax. +60 37 57 4880 Mexico: Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Tel. +31 40 278 2785, Fax. +31 40 278 8399 New Zealand: Tel. +64 98 49 4160, Fax. +64 98 49 7811 Norway: Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Tel. +63 28 16 6380, Fax. +63 28 17 3474 Poland: Tel. +48 22 5710 000, Fax. +48 22 5710 001 Portugal: see Spain Romania: see Italy Russia: Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: Tel. +27 11 471 5401, Fax. +27 11 471 5398 South America: Tel. +55 11 821 2333, Fax. +55 11 829 1849 Spain: Tel. +34 33 01 6312, Fax. +34 33 01 4107 Sweden: Tel. +46 86 32 2000, Fax. +46 86 32 2745 Switzerland: Tel. +41 14 88 2686, Fax. +41 14 81 7730 Taiwan: Tel. +886 22 134 2865, Fax. +886 22 134 2874 Thailand: Tel. +66 27 45 4090, Fax. +66 23 98 0793 Turkey: Tel. +90 216 522 1500, Fax. +90 216 522 1813 Ukraine: Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Tel. +44 208 730 5000, Fax. +44 208 754 8421 United States: Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: Tel. +381 11 3341 299, Fax. +381 11 3342 553 For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 272 4825 Internet: http://www.semiconductors.philips.com (SCA69) © Philips Electronics N.V. 2000. All rights reserved. 9397 750 06861 Product specification Rev. 02 — 14 February 2000 20 of 21 TDA8944J Philips Semiconductors 2 x 7 W stereo BTL audio amplifier Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.2.1 8.2.2 8.3 8.3.1 8.4 8.5 8.5.1 8.5.2 9 10 11 12 13 14 14.1 14.1.1 14.1.2 14.2 15 15.1 15.2 16 17 17.1 17.2 17.3 17.4 18 19 20 21 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 Functional description . . . . . . . . . . . . . . . . . . . 4 Input configuration . . . . . . . . . . . . . . . . . . . . . . 4 Power amplifier . . . . . . . . . . . . . . . . . . . . . . . . . 5 Output power measurement . . . . . . . . . . . . . . . 5 Headroom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . 5 Switch-on and switch-off. . . . . . . . . . . . . . . . . . 6 Supply Voltage Ripple Rejection (SVRR) . . . . . 6 Built-in protection circuits . . . . . . . . . . . . . . . . . 6 Short-circuit protection . . . . . . . . . . . . . . . . . . . 6 Thermal shutdown protection . . . . . . . . . . . . . . 6 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal characteristics. . . . . . . . . . . . . . . . . . . 7 Static characteristics. . . . . . . . . . . . . . . . . . . . . 7 Dynamic characteristics . . . . . . . . . . . . . . . . . . 8 Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 12 Application information. . . . . . . . . . . . . . . . . . 13 Printed-circuit board (PCB). . . . . . . . . . . . . . . 13 Layout and grounding . . . . . . . . . . . . . . . . . . . 13 Power supply decoupling . . . . . . . . . . . . . . . . 14 Thermal behaviour and heatsink calculation . 15 Test information. . . . . . . . . . . . . . . . . . . . . . . . 15 Quality information . . . . . . . . . . . . . . . . . . . . . 15 Test conditions . . . . . . . . . . . . . . . . . . . . . . . . 15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Introduction to soldering through-hole mount packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Soldering by dipping or by solder wave . . . . . 17 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 17 Package related soldering information . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 18 Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 19 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 © Philips Electronics N.V. 2000. Printed in The Netherlands All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 14 February 2000 Document order number: 9397 750 06861