STEVAL-CCA001V1 STMicroelectronics

TS4962M 3W filter-free class D audio power amplifier Features Pin connections Operating from V = 2.4V to 5.5V CC ININ GNDGND OUTOUT Standby mode active low ++ -- 1/1/AA11 2/A22/A2 3/A33/A3 Output power: 3W into 4 and 1.75W into 8 VV GNGNDD with 10% THD+N max and 5V power supply. VV DDDD DDDD 4/4/BB11 5/B25/B2 6/B36/B3 Output power: 2.3W 5V or 0.75W 3.0V into 4 with 1% THD+N max. ININ STSTBYBY OUTOUT -- ++ 7/C7/C11 8/C28/C2 9/C9/C33 Output power: 1.4W 5V or 0.45W 3.0V IN+: positive differential input into 8 with 1% THD+N max. IN-: negative differential input VDD: analog power supply Adjustable gain via external resistors GND: power supply ground STBY: standby pin (active low) Low current consumption 2mA 3V OUT+: positive differential output OUT-: negative differential output Efficiency: 88% typ. Signal to noise ratio: 85dB typ. Block diagram PSRR: 63dB typ. 217Hz with 6dB gain B1 B2 PWM base frequency: 250kHz Vcc Stdby C2 Internal Bias Low pop & click noise Out+ 150k C3 Thermal shutdown protection C1 Output - In- Available in flip-chip 9 x 300m (Pb-free) H PWM In+ + Bridge A1 A3 150k Out- Description Oscillator GND The TS4962M is a differential Class-D BTL power A2 B3 amplifier. It is able to drive up to 2.3W into a 4 load and 1.4W into a 8 load at 5V. It achieves outstanding efficiency (88%typ.) compared to classical Class-AB audio amps. Applications The gain of the device can be controlled via two external gain-setting resistors. Pop & click Cellular phone reduction circuitry provides low on/off switch noise PDA while allowing the device to start within 5ms. A Notebook PC standby function (active low) allows the reduction of current consumption to 10nA typ. January 2007 Rev 4 1/41 www.st.com 41 300kContents TS4962M Contents 1 Absolute maximum ratings . 3 2 Application component information 4 3 Electrical characteristics . 5 4 Electrical characteristic curves . 16 5 Application information . 28 5.1 Differential configuration principle 28 5.2 Gain in typical application schematic 28 5.3 Common mode feedback loop limitations . 29 For example: . 29 5.4 Low frequency response . 29 5.5 Decoupling of the circuit 30 5.6 Wake-up time: (t ) . 30 WU 5.7 Shutdown time (t ) . 30 STBY 5.8 Consumption in shutdown mode . 30 5.9 Single-ended input configuration . 30 5.10 Output filter considerations 32 5.11 Different examples with summed inputs 33 Example 1: Dual differential inputs . 33 Example 2: One differential input plus one single-ended input . 34 6 Demoboard . 35 7 Footprint recommendations 37 8 Package information 38 9 Ordering information . 39 10 Revision history . 40 2/41