INTEGRATED CIRCUITS DATA SHEET W mono BTL audio amplifier with DC Supersedes data of 1996 May 8 File under Integrated Circuits, IC1 1997 Aug 1
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 is a mono Bridge-Tied Load (BTL) output amplifier with DC. It is designed for use in TV and monitors, but is also suitable for battery-fed portable recorders and radios. The device is contained in a 9-pin medium power package. A Missing Current Limiter (MCL) is built in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 1 ma (3 ma typ.). 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. 18 V P O output power V P =1V R L =16Ω 3 3. W R L =8Ω. W G v(max) maximum total voltage gain 39.. 1. db φ gain control 68 73. db I q(tot) total quiescent current V P = 1 V; R L = 9. 13 ma THD total harmonic distortion P O =. W.3 1 % ORDERING INFORMATION TYPE PACKAGE NUMBER NAME DESCRIPTION VERSION SIL9MPF plastic single in-line medium power package with fin; 9 leads SOT11-1 1997 Aug 1
BLOCK DIAGRAM V P handbook, full pagewidth n.c. n.c. 1 9 I + i 6 positive output input 3 DC I i 8 negative output V ref STABILIZER TEMPERATURE PROTECTION 7 MSA78-1 signal ground power ground Fig.1 Block diagram. PINNING SYMBOL PIN DESCRIPTION n.c. 1 not connected V P positive supply voltage V I 3 voltage input GND1 signal ground VC DC OUT+ 6 positive output GND 7 power ground OUT 8 negative output n.c. 9 not connected n.c. VP V I GND1 VC OUT GND OUT 1 3 6 7 8 n.c. 9 MSA77 Fig. Pin configuration. 1997 Aug 1 3
FUNCTIONAL DESCRIPTION The is a mono BTL output amplifier with DC, designed for use in TV and monitor but is also suitable for battery-fed portable recorders and radios. In conventional DC volume circuits the control or input stage is AC coupled to the output stage via external capacitors to keep the offset voltage low. In the the DC stage is integrated into the input stage so that no coupling capacitors are required. With this configuration, a low offset voltage is still maintained and the minimum supply voltage 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. 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. db. The DC stage has a logarithmic control characteristic. Therefore, the total gain can be controlled from. db to 33 db. If the DC voltage falls below. V, the device will switch to the mute mode. The amplifier is short-circuit proof to ground, V P and across the load. Also a thermal protection circuit is implemented. If the crystal temperature rises above +1 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. Power dissipation Assume V P = 1 V; R L =16Ω. The maximum sine wave dissipation is = 1.8 W. The R th vj-a of the package is K/W. Therefore T amb (max) = 1 1.8 = 1 C. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 13). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT V P supply voltage 18 V V 3, input voltage pins 3 and V I ORM repetitive peak output current 1. A I OSM non-repetitive peak output current 1. A P tot total power dissipation T case < 6 C 9 W T amb operating ambient temperature +8 C T stg storage temperature +1 C T vj virtual junction temperature +1 C T sc short-circuit time 1 h THERMAL CHARACTERISTICS SYMBOL PARAMETER VALUE UNIT R th j-a thermal resistance from junction to ambient in free air K/W R th j-c thermal resistance from junction to case 1 K/W 1997 Aug 1
CHARACTERISTICS V P = 1 V; V DC = 1. V; f = 1 khz; R L =16Ω; T amb = C; unless otherwise specified (see Fig.13). SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply V P positive supply voltage. 18 V I q(tot) total quiescent current note 1; R L = 9. 13 ma Maximum gain (V = 1. V) P O output power THD = 1%; R L =16Ω 3 3. W THD = 1%; R L =8Ω. W THD total harmonic distortion P O =. W.3 1 % G v(max) maximum total voltage gain 39.. 1. db V I input signal handling (RMS value) G v(max) = db; THD < 1% 1. V V no noise output voltage (RMS value) note ; f = khz 1 µv B bandwidth at 1 db. to 3 khz SVRR supply voltage ripple rejection note 3 3 38 db V O DC output offset voltage V 8 v 6 mv Z I input impedance (pin 3) 1 kω Mute position V O output voltage in mute position note ; V. V; V I = 1. V 3 µv DC ; note φ gain control 68 73. db I control current V =V 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.. The noise output voltage (RMS value) at f = khz is measured with R S =Ω and B = khz. 3. The ripple rejection is measured with R S =Ω and f = 1 Hz to 1 khz. The ripple voltage V R of mv (RMS value) is applied to the positive supply rail.. The noise output voltage (RMS value) is measured with R S =kω unweighted.. The DC can be configured in several ways. Two possible circuits are shown in Figs 1 and 1. The circuits at the pin will influence the switch-on and switch-off behaviour and the maximum voltage gain. 1997 Aug 1
MBH37 1 MBH36 G v (db) V no (mv) 1 1 8 1..8 1. 1.6. V (V) DC 1..8 1. 1.6 V DC (V) Measured with R S =kω unweighted. Frequency range is Hz to khz. Fig.3 Gain control as a function of DC volume control. Fig. Noise output voltage as a function of DC. I DC (µa) 1 MBH376 I P (ma) MBH367 1 1 1..8 1. 1.6. V DC (V) 8 1 16 VP (V) Fig. Control current as a function of DC volume control. Measured with R L =. Fig.6 Quiescent current versus supply voltage. 1997 Aug 1 6
1 THD (%) 8 (1) () MBH361 1 THD (%) 8 MBH36 6 6 (1) () 1-1 1 P O (W) 1 1 1 1 1 1 f (khz) 1 (1) R L 16 Ω. () R L =8Ω. Fig.7 Total harmonic distortion versus output power. P O =.1 W. (1) G v(max) =db. () G v(max) =3dB. Fig.8 Total harmonic distortion versus frequency. 1 P O (W) 8 MBH363 6 P d (W) MBH36 6 (1) () 3 (1) () 1 8 1 16 VP (V) 8 1 16 VP (V) Measured at a THD of 1%. The maximum output power is limited by the maximum power dissipation and the maximum available output current. (1) R L =8Ω. () R L =16Ω. Fig.9 Output power versus supply voltage. (1) R L =8Ω. () R L =16Ω. Fig.1 Total worst case power dissipation versus supply voltage. 1997 Aug 1 7
SVRR (db) 3 (1) MBH37. V I (V) 1.6 MBH37 1..8 () 6. 7 1 1 1 1 1 1 f (khz) 8 1 16 VP (V) Measured with V R =. V. (1) V DC = 1. V. () V DC =. V. Fig.11 Supply voltage ripple rejection versus frequency. Measured at a THD of 1% and a voltage gain of db. Fig.1 Input signal handling. 1997 Aug 1 8
TEST AND APPLICATION INFORMATION handbook, full pagewidth (1) 1 nf µf V P = 1 V n.c. n.c. 1 9 I + i 6 + input.7 µf 3 R L = 8 Ω I i 8 R S kω DC volume control STABILIZER TEMPERATURE PROTECTION 7 ground MSA79 - To avoid instabilities and too high distortion, the input- and power ground must be separated as long as possible and connected together as close as possible to the IC. (1) This capacitor can be omitted if the µf electrolytic capacitor is connected close to pin. Fig.13 Test and application diagram. For single-end application the output peak current may not exceed 1 ma; at higher output currents the short circuit protection (MLC) will be activated. 1997 Aug 1 9
V P = 1 V volume control volume control 1 kω 1 µf 1 MΩ MSA71 1 µf kω MBH366 Fig.1 Application with potentiometer as volume control; maximum gain = 3 db. Fig.1 Application with potentiometer as volume control; maximum gain = db. 1997 Aug 1 1
PACKAGE OUTLINE SIL9MPF: plastic single in-line medium power package with fin; 9 leads SOT11-1 D P D 1 q P1 A q 1 q A 3 A A seating plane pin 1 index E 1 9 L c Z e b Q b b 1 w M 1 mm scale DIMENSIONS (mm are the original dimensions) A UNIT A A max. 3 b b 1 b c D (1) D 1 E (1) Z (1) A e L P P 1 Q q q 1 q w max. mm 18. 8.7 1.8 1..67 1..8 1.8 1. 6.8 3.7. 3.9.7 3. 1.7 1.1..9. 1. 17.8 8. 1. 1.1. 1.1.38 1..7 6. 3.. 3. 1. 1.9..7 Note 1. Plastic or metal protrusions of. mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE SOT11-1 9-11-17 9-- 1997 Aug 1 11
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 9398 6 911). Soldering by dipping or by wave The maximum permissible temperature of the solder is 6 C; solder at this temperature must not be in contact with the joint for more than seconds. The total contact time of successive solder waves must not exceed 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 V) to the lead(s) of the package, below the seating plane or not more than 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 C, contact may be up to seconds. DEFINITIONS Data sheet status Objective specification 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. This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 13). 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. 1997 Aug 1 1