INTEGRATED CIRCUITS DATA SHEET Stereo BTL audio output amplifier with DC Supersedes data of May 1995 File under Integrated Circuits, IC1 1995 Nov 9
Stereo BTL audio output amplifier with DC FEATURES DC Few external components Mute mode Thermal protection Short-circuit proof No switch-on and switch-off clicks Good overall stability Low power consumption Low HF radiation ESD protected on all pins. GENERAL DESCRIPTION The (2 1 W) and T (2.5 W) are stereo BTL output amplifiers with DC. The devices are designed for use in TV and monitors, but are also suitable for battery-fed portable recorders and radios. Missing Current Limiter (MCL) A MCL protection circuit is built-in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 1 ma (typical 3 ma). This level of 1 ma allows for headphone applications (single-ended). QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V P supply voltage 4.5 1 V P out output power V P =6V R L =Ω.5 1. W T R L =16Ω.5.6 W G v voltage gain 39.5 4.5 41.5 db G C gain control 6. 73.5 db I q(tot) total quiescent current V P =6V; R L = 22 25 ma THD total harmonic distortion P out =.5 W.3 1 % T P out =.25 W.3 1 % ORDERING INFORMATION TYPE PACKAGE NUMBER NAME DESCRIPTION VERSION DIP16 plastic dual in-line package; 16 leads (3 mil); long body SOT3-1 T SO16 plastic small outline package; 16 leads; body width 7.5 mm SOT162-1 1995 Nov 9 2
BLOCK DIAGRAM V P input 1 5 T 4 I i 16 positive output 1 DC volume control 1 2 Ι I i 13 negative output 1 V ref STABILIZER TEMPERATURE PROTECTION input 2 6 I i 12 negative output 2 DC volume control 2 ΙΙ I i 9 positive output 2 1,3,11,15 7 14 1 MSA717-2 not connected signal ground power ground 1 power ground 2 Fig.1 Block diagram. 1995 Nov 9 3
PINNING SYMBOL PIN DESCRIPTION n.c. 1 not connected VC1 2 DC 1 n.c. 3 not connected V I (1) 4 voltage input 1 V P 5 positive supply voltage V I (2) 6 voltage input 2 SGND 7 signal ground VC2 DC 2 OUT2+ 9 positive output 2 PGND2 1 power ground 2 n.c. 11 not connected OUT2 12 negative output 2 OUT1 13 negative output 1 PGND1 14 power ground 1 n.c. 15 not connected OUT1+ 16 positive output 1 FUNCTIONAL DESCRIPTION The and T are stereo output amplifiers with two DC stages, designed for TV and monitors, but also suitable for battery-fed portable recorders and radios. In conventional DC circuits the control or input stage is AC coupled to the output stage via external capacitors to keep the offset voltage low. The two DC stages are integrated into the input stages so that no coupling capacitors are required and a low offset voltage is still maintained. The minimum supply voltage also remains low. The BTL principle offers the following advantages: Lower peak value of the supply current The frequency of the ripple on the supply voltage is twice the signal frequency. Consequently, a reduced power supply with smaller capacitors can be used which results in cost reductions. n.c. VC1 n.c. V I (1) V P V I (2) SGND VC2 1 2 3 4 5 6 7 T MSA719-2 16 15 14 13 12 11 1 Fig.2 Pin configuration. 9 OUT1 n.c. PGND1 OUT1 OUT2 n.c. PGND2 OUT2 For portable applications there is a trend to decrease the supply voltage, resulting in a reduction of output power at conventional output stages. Using the BTL principle increases the output power. The maximum gain of the amplifier is fixed at 4.5 db. The DC stages have a logarithmic control characteristic. Therefore, the total gain can be controlled from +4.5 to 33 db. If the DC voltage falls below.4 V, the device will switch to the mute mode. The amplifier is short-circuit protected to ground, V P and across the load. A thermal protection circuit is also implemented. If the crystal temperature rises above 15 C the gain will be reduced, thereby reducing the output power. Special attention is given to switch-on and switch-off clicks, low HF radiation and a good overall stability. 1995 Nov 9 4
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT V P supply voltage 1 V I ORM repetitive peak output current 1.25 A I OSM non-repetitive peak output current 1.5 A P tot total power dissipation T amb 25 C 2.5 W T 1.32 W t sc short-circuit time 1 hr V n input voltage pins 2, 4, 6 and 5 V T amb operating ambient temperature 4 +5 C T stg storage temperature 55 +15 C T vj virtual junction temperature +15 C THERMAL CHARACTERISTICS SYMBOL PARAMETER VALUE UNIT R th j-a thermal resistance from junction to ambient in free air 5 K/W T 95 K/W Power dissipation : Assume V P = 6 V and R L =Ω. The maximum sine wave dissipation is 2.9 W = 1. W. The R th j-a of the package is 5 K/W therefore T amb(max) = 15 (5 1.) = 6 C. T: Assume V P = 6 V and R L =16Ω. The maximum sine wave dissipation is 2.46 W =.92 W. The R th j-a of the package is 95 K/W therefore T amb(max) = 15 (95.92) = 62.6 C. 1995 Nov 9 5
CHARACTERISTICS V P =6V; T amb =25 C; f i = 1 khz; : R L =Ω; T: R L =16Ω; unless otherwise specified (see Fig.13). SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V P supply voltage 4.5 1 V I q(tot) total quiescent current V P =6V; R L = ; note 1 22 25 ma Maximum gain; V 2, 1.4 V P out output power THD = 1% 1. 1.1 W T.5.6 W THD total harmonic distortion P out =.5 W.3 1 % T P out =.25 W.3 1 % G v voltage gain 39.5 4.5 41.5 db V I(rms) input signal handling (RMS value) G v = db; THD < 1% 1 V V no noise output voltage f i = 5 khz; note 2 21 µv B bandwidth at 1 db note 3 Hz SVRR supply voltage ripple rejection note 4 34 3 db V O(os) DC output offset voltage V 16 V 13 and V 12 V 9 2 mv Z i input impedance (pins 4 and 6) 15 2 25 kω α cs channel separation R S =5kΩ 4 db G v channel unbalance note 5 1 db G 1 = db; note 6 1 db Mute position; V 2, =.4 V ±3 mv V O output voltage in mute position V i = 1. V; note 7 3 µv DC G C gain control 6.5 73.5 db I DC current V 2 =V =V 2 25 3 µa Notes 1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being equal to the DC output offset voltage divided by R L. 2. The noise output voltage (RMS value) at f i = 5 khz is measured with R S =Ω and bandwidth = 5 khz. 3. 2 Hz to 3 khz (typical). 4. The ripple rejection is measured with R S =Ω and f i = 1 Hz to 1 khz. The ripple voltage of 2 mv (RMS value) is applied to the positive supply rail. 5. The channel unbalance is measured with V DC1 =V DC2. 6. The channel unbalance at G 1 = db is measured with V DC1 =V DC2. 7. The noise output voltage (RMS value) is measured with R S =5kΩ unweighted. 1995 Nov 9 6
4 I q (ma) MBG672 12 THD (%) MBG671 3 2 (1) (2) (3) 4 1 4 12 16 2 V P (V) 1 2 1 1 1 P out (W) 1 Fig.3 Quiescent current as a function of supply voltage. (1) V P = 4.5 V. (2) V P = 6 V; R L =Ω. (3) V P = 12 V; R L =25Ω. Fig.4 THD as a function of output power. 1 THD (%) MBG669 2.5 P out (W) 2. MBG67 6 1.5 (1) (2) (3) 4 1. 2 (2) (1).5 1 2 1 1 1 1 1 2 f (khz) 4 12 16 V P (V) (1) G v = 3 db; P o =.1 W. (2) G v = 4 db; P o =.1 W. Fig.5 THD as a function of frequency. (1) R L =Ω. (2) R L =16Ω. (3) R L =25Ω. Fig.6 Output power as a function of supply voltage. 1995 Nov 9 7
4 P diss (W) 3 (1) (2) (3) MBG66 G v (db) 4 MBG667 2 4 1 4 12 16 V P (V) 12.4. 1.2 1.6 2. V VC (V) (1) R L =Ω. (2) R L =16Ω. (3) R L =25Ω. Fig.7 Total worst case power dissipation as a function of supply voltage. Fig. Voltage gain as a function of voltage. 1 V no (mv) MBG664 SVRR (db) 2 MBG663 1 1 4 (1) 6 (2) 1 2.4. 1.2 1.6 2. V VC (V) 1 2 1 1 1 1 1 2 f (khz) f = 22 Hz to 22 khz. Fig.9 Noise voltage as a function of volume control voltage. (1) V DC = 1.4 V;V ripple =.2 V. (2) V DC =.4 V; V ripple =.2 V. Fig.1 SVRR as a function of frequency. 1995 Nov 9
2. V in (V) 1.6 MBG665 3 I VC (µa) 2 MBG666 1 1.2. 1.4 2 4 12 16 2 V P (V) 3.4. 1.2 1.6 2. V VC (V) THD = 1 %. Fig.11 Input signal handling. Fig.12 Volume control current as a function of voltage. APPLICATION INFORMATION The application diagram is illustrated in Fig.13. Test conditions T amb =25 C unless otherwise specified; V P =6V; V DC = 1.4 V; f i = 1 khz; R L =Ω. The quiescent current has been measured without load impedance. The output power as a function of the supply voltage has been measured at THD = 1%. The maximum output power is limited by the maximum power dissipation and the maximum available output current. The maximum input signal voltage is measured at THD = 1% at the output with a voltage gain of db. To avoid instabilities and too high distortion, the input ground and power ground must be separated as far as possible and connected as close as possible to the IC. The DC can be applied in several ways. Two possible circuits are shown below the main application diagram. The circuits at the control pin will influence the switch-on and switch-off behaviour and the maximum voltage gain. For single-end applications the output peak current must not exceed 1 ma. At higher output currents the short-circuit protection (MCL) will be active. 1995 Nov 9 9
handbook, full pagewidth (1) 1 nf 22 µf V P = 6 V 5 16 input 1 47 nf 4 2 I + 1 (2) R s = 5 kω I 1 13 STABILIZER TEMPERATURE MCL PROTECTION 12 input 2 47 nf 6 I 1 (2) R s = 5 kω DC- volume I + 1 9 7 1 14 signal ground power ground V CC = 6 V volume control 2, maximum voltage gain 34 db volume control 56 kω 2, maximum voltage gain 4 db 1 µf 1 MΩ 1 µf 22 kω MBG673 (1) This capacitor can be omitted if the 22 µf electrolytic capacitor is connected close to pin 5. (2) R L =Ω. Fig.13 Test and application diagram. 1995 Nov 9 1
PACKAGE OUTLINES DIP16: plastic dual in-line package; 16 leads (3 mil); long body SOT3-1 D M E seating plane A 2 A L A 1 Z 16 e b b 1 9 w M c (e ) 1 M H pin 1 index E 1 5 1 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. A 1 A 2 (1) (1) min. max. b b 1 c D E e e 1 L M E M H 4.7.51 3.7.19.2.15 1.4 1.14.55.45.53.3.21.15.32.23.13.9 21. 21.4.6.4 Note 1. Plastic or metal protrusions of.25 mm maximum per side are not included. 6.4 6.2.26.24 2.54 7.62.1.3 3.9 3.4.15.13.25 7..32.31 9.5.3.37.33 w.254.1 (1) Z max. 2.2.7 OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE SOT3-1 5G9 MO-1AE 92-1-2 95-1-19 1995 Nov 9 11
SO16: plastic small outline package; 16 leads; body width 7.5 mm SOT162-1 D E A X c y H E v M A Z 16 9 Q A 2 A 1 (A ) 3 A pin 1 index L L p θ 1 e b p w M detail X 5 1 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 2.65.1 A 1 A 2 A 3 b p c D (1) E (1) e H (1) E L L p Q v w y Z.3.1.12.4 2.45 2.25.96.9.25.1.49.36.19.14.32.23.13.9 1.5 1.1.41.4 7.6 7.4.3.29 1.27.5 Note 1. Plastic or metal protrusions of.15 mm maximum per side are not included. 1.65 1..42.39 1.4.55 1.1.4.43.16 1.1 1..43.39.25.25.1.1.1.4 θ.9.4 o o.35.16 OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE SOT162-1 75E3 MS-13AA 92-11-17 95-1-24 1995 Nov 9 12
SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our IC Package Databook (order code 939 652 911). DIP SOLDERING BY DIPPING OR BY WAVE The maximum permissible temperature of the solder is 26 C; solder at this temperature must not be in contact with the joint 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 (T stg 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. REPAIRING SOLDERED JOINTS Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 3 C it may remain in contact for up to 1 seconds. If the bit temperature is between 3 and 4 C, contact may be up to 5 seconds. SO REFLOW SOLDERING Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 5 and 3 seconds depending on heating method. Typical reflow temperatures range from 215 to 25 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 C. WAVE SOLDERING Wave soldering techniques can be used for all SO packages if the following conditions are observed: A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. The longitudinal axis of the package footprint must be parallel to the solder flow. The package footprint must incorporate solder thieves at the downstream end. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Maximum permissible solder temperature is 26 C, and maximum duration of package immersion in solder is 1 seconds, if cooled to less than 15 C within 6 seconds. Typical dwell time is 4 seconds at 25 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. REPAIRING SOLDERED JOINTS Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 1 seconds at up to 3 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 27 and 32 C. 1995 Nov 9 13
DEFINITIONS Data sheet status This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). 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 Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS 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 customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1995 Nov 9 14