Mono 1.9W / Stereo 300mW Power Amplifier Low Voltage Operation, Shutdown Function

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May Black
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1 Low Voltage Operation, Shutdown Function FEATURES Operation range:.4v ~ 6.5V Shutdown Current 8uA at 5V Output power, THDN=% BTL, R L =3Ω,.W at 5V BTL, R L =4Ω,.9W at 5V, 0.83W at 3.3V, 500mW at.7v BTL, R L =8Ω,.W at 5V, 0.54W at 3.3V, 350mW at.7v SE, R L =8Ω, 300mW at 5V, 5mW at 3.3V, 85mW at.7v SE, R L =3Ω, 90mW at 5V, 43mW at 3.3V, 5mW at.7v Headphone sense Unity-gain stable, pop noise free Space-saving MSOP0 (enhance thermal pad), TSSOP4 APPLICATIONS Desktop computer s sound card Portable audio devices PDA Handheld games Communication headsets Cross-reference: SSM50, LM4853, LM4858 DESCRIPTION The is a low distortion power amplifier that can drive a set of.9w of continuous average power into a mono 4Ω bridged-tied load (BTL) or * 90mW into stereo 3Ω single ended (SE) loads headphone. It can automatically switch between mono BTL and stereo s utilizing a headphone sense pin. The BTL configuration eliminates the need for external coupling capacitors on the output in most applications. The unity gain stable s gain is set by external gain-setting resistors. The has good feature for portable equipment, these features include the low voltage operation, micropower consumption shutdown mode, enhance thermal pad and small package MSOP0, TSSOP4, make the ideally suited for use in portable digital audio equipments. BLOCK DIAGRAM L-IN - A L-OUT / BTL OUT- BYPASS - A BTL OUT R-IN - A3 R-OUT Mono / Stereo Mode Switching Circuitry HP-IN GND Click/Pop Reduction Bias SHUTDOWN REV 6 /4

2 PIN CONFIGURATION MSOP0 TSSOP4 Symbol Pin Pin L-IN Left channel input SHUTDOWN 3 HP-IN 3 4 GND 4 5 Ground R-IN 5 6 Right channel input R-OUT 6 9 Right channel output BY PASS 7 0 Description SHUTDOWN places the entire device in shutdown mode when held high. TTL compatible input. Headphone input detection. A logical low sets, a logical high sets. BTL OUT 8 Bridged-tied load positive output BYPASS is the cap to the voltage divider for internal mid-supply bias. This terminal should be connected to a 0.-µF to 0-µF capacitor C BP. VDD 9 Supply voltage L-OUT/BTL OUT- 0 3 Left channel output or bridged-tied load negative output nc -,7,8,4 No connected MSOP0 TSSOP4 L-IN SHUTDOWN HP-IN GND R-IN Thermal Pad L-OUT / BTL OUT- BTL OUT BYPASS R-OUT nc L-IN SHUTDOWN 3 HP-IN 4 GND 5 R-IN nc L-OUT / BTL OUT- BTL OUT BYPASS R-OUT nc 7 8 nc ORDERING INFORMATION Package Part number Packaging Marking Transport Media 0-Pin MSOP (lead free) MGTR 6853G 3.5k Units Tape and Reel 0-Pin MSOP (lead free) MGU 6853G 80 Units Tube 4Pin TSSOP (lead free) TGTR G.5Units Tape and Reel 4Pin TSSOP (lead free) TGU G 98Units Tube RoHS Compliance REV 6 /4

3 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit VDD Supply voltage 6.5 V V ESD Electrostatic handling to 3000 V T STG Storage temperature range -65 to 50 T A Operating ambient temperature range -40 to 85 T J Maximum junction temperature 50 T S Soldering temperature, 0 seconds 60 R THJA Thermal resistance from junction to ambient in free air MSOP0 (enhance thermal pad) TSSOP /W OPERATING RATINGS Symbol Parameter Min Typ Max Unit Supply voltage V 5V ELECTRICAL CHARACTERISTICS Ta = 5 C, =5V,, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit I Q Quiescent current BTL Mode, V IN =0V, I O =0A ma SE Mode, V IN =0V, I O =0A ma I SD Shutdown current SD Mode, V SD = 8 ua V SDH Shutdown input voltage high V V SDL Shutdown input voltage low V V HPINH HP-IN input voltage high V Hysteresis voltage HP-IN input voltage low V V HPINL CS Channel separation SE Mode, R L =3Ω db PSRR THDN Power supply rejection ratio Total harmonic distortion plus noise BTL Mode, R L =8Ω C BP =, f=00hz SE Mode, R L =3Ω C BP =0uF, f=00hz, R L =3Ω, 60mW db db db % S/N Signal-to-noise ratio, A-weighting db Po Output power BTL Mode, R L = 3Ω BTL Mode, R L = 4Ω BTL Mode, R L = 8Ω SE Mode, R L =8Ω SE Mode, R L = 3Ω -. - W W -. - W - 300m - W - 90m - W REV 6 3/4

4 3.3V ELECTRICAL CHARACTERISTICS Ta = 5 C, =3.3V,, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit I Q Quiescent current BTL Mode, V IN =0V, I O =0A -. - ma SE Mode, V IN =0V, I O =0A -. - ma I SD Shutdown current SD Mode, V SD = - - ua CS Channel separation SE Mode, R L =3Ω db PSRR THDN Power supply rejection ratio Total harmonic distortion plus noise BTL Mode, R L =8Ω C BP =, f=00hz SE Mode, R L =3Ω C BP =0uF, f=00hz, R L =3Ω, 5mW db db db % S/N Signal-to-noise ratio, A-weighting db Po Output power BTL Mode, R L = 4Ω BTL Mode, R L = 8Ω SE Mode, R L =8Ω SE Mode, R L = 3Ω W W - 5m - W - 43m - W.7V ELECTRICAL CHARACTERISTICS Ta = 5 C, =.7V,, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit I Q Quiescent current BTL Mode, V IN =0V, I O =0A - - ma SE Mode, V IN =0V, I O =0A - - ma I SD Shutdown current SD Mode, V SD = ua CS Channel separation SE Mode, R L =3Ω db PSRR THDN Power supply rejection ratio Total harmonic distortion plus noise BTL Mode, R L =8Ω C BP =, f=00hz SE Mode, R L =3Ω C BP =0uF, f=00hz, R L =3Ω, 5mW db db db % S/N Signal-to-noise ratio, A-weighting db Po Output power BTL Mode, R L = 4Ω BTL Mode; R L = 8Ω SE Mode; R L = 8Ω SE Mode; R L = 3Ω W W - 85m - W - 5m - W REV 6 4/4

5 .4V ELECTRICAL CHARACTERISTICS Ta = 5 C, =.4V,, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit THDN Total harmonic distortion plus noise, R L =3Ω, 5mW db % S/N Signal-to-noise ratio, A-weighting db Po Output power BTL Mode, R L = 4Ω BTL Mode; R L = 8Ω SE Mode; R L = 8Ω SE Mode; R L = 3Ω W W - 67m - W - m - W REV 6 5/4

TYPICAL PERFORMANCE CHARACTERISTICS Ta = 5 C, BW<30kHz, unless otherwise specified. RL=4Ω RL=4Ω RL=4Ω Po=.9W Po=0.8W Po=0.5W THDN vs. frequency THDN vs. frequency THDN vs. frequency Po=.W Po=0.5W Po=0.

6 TYPICAL PERFORMANCE CHARACTERISTICS Ta = 5 C, BW<30kHz, unless otherwise specified. RL=4Ω RL=4Ω RL=4Ω Po=.9W Po=0.8W Po=0.5W THDN vs. frequency THDN vs. frequency THDN vs. frequency Po=.W Po=0.5W Po=0.34W Po=W Po=0.3W Po=0.5W THDN vs. frequency THDN vs. frequency THDN vs. frequency Po=5mW Po=90mW Po=5mW Po=60mW Po=35mW Po=5mW THDN vs. frequency THDN vs. frequency THDN vs. frequency REV 6 6/4

7 RL=4Ω RL=4Ω RL=4Ω THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power THDN vs. output power REV 6 7/4

8 CBP=0uF CBP=0uF CBP=0uF PSRR (db) CBP= PSRR (db) CBP= PSRR (db) CBP= PSRR vs. frequency PSRR vs. frequency PSRR vs. frequency CBP= CBP= CBP= CBP=0uF CBP=0uF CBP=0uF PSRR (db) PSRR (db) PSRR (db) PSRR vs. frequency PSRR vs. frequency PSRR vs. frequency VIN=0V No load QUIESCENT CURRENT (ma) CHANNEL SEPARATION (db) Po=90mW Po=40mW Po=5mW OUTPUT MODE SUPPLY VOLTAGE (V) HP-IN VOLTAGE (V) Quiescent current vs. supply voltage Channel separation vs. frequency Output mode vs. HP-IN voltage REV 6 8/4

9 APPLICATION INFORMATION Basic application example 0k R F V INL 0k R IN 00k 00k L-IN SHUTDOWN HP-IN L-OUT/BTL OUT- VDD BTL OUT R L 8Ω 00uF k Headphone Jack GND BYPASS 0k R-IN R-OUT 00uF R IN k V INR 0k R F DC Gain = -R F / R IN = - Fig. A audio amplifier application circuit. (connected to R-OUT) 0k R F V INL 0k R IN 00k 00k 00k 0. L-IN SHUTDOWN HP-IN GND L-OUT/BTL OUT- VDD BTL OUT BYPASS R L 8Ω 00uF k Headphone Jack 0k R-IN R-OUT 00uF R IN V INR 0k k R F DC Gain = -R F / R IN = - Fig. A audio amplifier application circuit. (connected to L-OUT) REV 6 9/4

10 and operation As shown in block diagram and Fig., in the, the operates as a high current output dual op amp. Amplifier A and A3 are independent amplifiers with an externally configured gain of A V = - R F /R IN. Amplifier A is shut down to a high output impedance state. In, A3 is shutdown to a high impedance state. The audio signal from the R-IN pin is directed to the inverting input of A. As a result, the L-IN and R-IN audio signals, V INL and V INR, are summed together at the input of A. A is then activated with a closed-loop gain of A V = - fixed by two internal resistors. The outputs of A and A are then used to drive the mono bridged-tied load. HP-IN operation The ability of the is easily switched between mono BTL and stereo s. The mode is switched by headphone control pin, HP-IN. A logic-high activates the when a set of headphone plugged into the system, on the other hand, a logical-low to HP-IN activates the when no headphones. HP-IN pin is a hysteresis control input, the hysteresis range is from 0.65VDD to 0.75VDD. In the case of 5V VDD for (the hysteresis voltage for HP-IN is from 3.5V to 3.75V) and 3V VDD for the controlling device, such as MCU, a simple level shift circuit is needed, as shown below. 5V 00k =5V =3V MCU pmos HP-IN Thermal pad considerations The thermal pad must be connected to ground. The package with thermal pad of the requires special attention on thermal design. The thermal pad on the bottom of the should be soldered down to a copper pad on the circuit board. Heat can be conducted away from the thermal pad through the copper plane to ambient. If the copper plane is not on the top surface of the circuit board, 9 vias of 3 mil or smaller in diameter should be used to thermally couple the thermal pad to the bottom plane. For good thermal conduction, the vias must be plated through and solder filled. REV 6 0/4

11 EXTERNAL DIMENSIONS TSSOP4 D E E Symbol Dimension in mm Dimension in inches Min Nom Max Min Nom Max A A A b C D E E e BASIC 0.06 BASIC L θ 0 o - 8 o 0 o - 8 o A A e b A L C θ MSOP0 (Thermal Pad) Thermal Pad Symbol Dimension in mm Dimension in inches Min Nom Max Min Nom Max H E W W A A A b c D H E e 0.50 BASIC 0.0 BASIC L θ 0 o - 6 o 0 o - 6 o W W D A A A e B L C θ REV 6 /4

12 TAPE AND REEL (Unit : mm) MSOP /-0.0 DIA R MAX MIN 0.5 Radius Typical.0.7 REV 6 /4

13 DEMO BOARD MSOP0 (Thermal Pad) TSSOP4 REV 6 3/4

14 Function description Label : Supply Input Supply voltage range is.7v to 6.5V, the right of jump is positive, the left of jump is negative. Label : Signal Input Connected to audio signals. Label 3: Speaker Output Connected to speaker with 8ohm or 4 ohm Label 4: Headphone Jack Used 3.5mm diameter of headphone with 3ohm Label 5: Shutdown Control System is active mode when jump is close, system enters shutdown mode when jump is open. and operation The headphone controls operational mode. System enters when headphone jack is empty. When a set of headphone plugged into the jack, the system switched to. Circuit JP3 Lin JP4 Rin C C R 0K R 0K JP VDD JP SHUTDOWN 0. C7 C3 R5 00K R6 00K R3 0K U L_IN L_O/B_O SD VDD HP_IN B_O GND BP R_IN R_O R C5 00uF LS SPEAKER C4 R7 K J JP5 3 OUTPUT 0K C6 HEADPHONE 00uF R8 K REV 6 4/4

Dual 2W Power Amplifier, I 2 C interface Stereo Input with Volume Control

Dual 2W Power Amplifier, I 2 C interface Stereo Input with Volume Control Dual W Power Amplifier, I C interface Stereo Input with Volume Control FEATURES Operation range:.4v ~ 6.5V Volume control range Gain: 0 to db, 3dB/step Attenuation: 0 to -77.5dB,.5dB/step Output mode :