STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet

Page 1

Features 2 W output power into 4 Ω load per channel ■ 125 mW into 16 Ω load ground-referenced ■ stereo headphone driver ■ Four-step gain settings on speaker path ■ 3 levels of 3D effect on speaker path ■ ...

Page 2

Contents Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Typical application . . . . . . . . . . . . . . ...

Page 3

TS4982 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol CCL PV Supply voltage CCR HPV CC CPV CC Input voltage Loudspeaker inputs V Headphone inputs in V HDEN V HDEN T Operating ...

Page 4

Absolute maximum ratings and operating conditions Table 2. Operating conditions Symbol V Common power supply voltage CC PV Left channel loudspeaker amplifier power supply CCL PV Right channel loudspeaker amplifier power supply CCR HPV Headphone supply voltage CC CPV Negative ...

Page 5

TS4982 2 Typical application Figure 1. Typical application schematics Cin 1uF LEFT SPEAKER INPUT Cin 1uF RIGHT SPEAKER INPUT SPEAKER STANDBY CONTROL Cinbeep Rin 47nF 47k PC BEEP INPUT GAIN SETTING (LSB) CONTROL GAIN SETTING (MSB) CONTROL Cin 1uF RIGHT ...

Page 6

Typical application Table 5. Pin descriptions Pin number Pin name I/O/P 1 3D1 I 2 LRIN I 3 LLIN I 4 BEEP I 5 PGND P 6 LOUT LOUT PVCC P 9 CPVCC P 10 CP+ ...

Page 7

TS4982 3 Electrical characteristics 3.1 Electrical characteristics tables Table 6. General electrical characteristics amb Symbol Current consumption, no load I Speaker mode Headphone mode, V Standby current consumption, no input signal I STBY V HDEN Level ...

Page 8

Electrical characteristics Table 7. Loudspeaker amplifier Cin = μF, V (unless otherwise specified) (continued) Symbol Capacitive load = 4 Ω to 100 Ω > 100 Ω Wake ...

Page 9

TS4982 Table 9. Internal charge pump stage Symbol Internal frequency of charge pump across temperature f osc range Table 10. PC beep input stage, R Symbol V Beep signal minimum amplitude beep f Beep signal minimum frequency beep 3.2 Electrical ...

Page 10

Electrical characteristics Figure 2. Current consumption vs. power supply voltage 25°C SPEAKER AMB load SPKREN HDEN HEADPHONE SPKREN HDEN ...

Page 11

TS4982 Figure 8. Output power vs. power supply 200 THD+N = 10% 150 100 50 THD 3.0 3.5 4.0 Power Supply Voltage HPV Figure 10. Output power vs. load resistance 2.5 SPEAKER 2.0 ...

Page 12

Electrical characteristics Figure 14. THD+N vs. output power 10 SPEAKER Ω CCL,R ° Gain = 9dB AMB BW = 22Hz to 22kHz ...

Page 13

TS4982 Figure 20. THD+N vs. frequency 10 SPEAKER Ω 1.5W ° 5V CCL,R AMB BW = 22Hz to 22kHz 1 Gain = 9dB 0.1 ...

Page 14

Electrical characteristics Figure 26. Wake-up time, V =PV =CPV CC CCL SPKREN IH Figure 28. Wake-up time, V =PV =CPV CC CCL HDEN IL Figure 30. Crosstalk vs. frequency 0 SPEAKER 5V, ...

Page 15

TS4982 Figure 32. Crosstalk vs. frequency 0 HEADPHONE 5V, HPV = CPV CC CCL,R CC -20 Ω 50mW AMB -40 -60 Left to Right channel ...

Page 16

Application information 4 Application information 4.1 General description The TS4982 is a stereo loudspeaker power amplifier and ground-referenced headphone driver with dedicated separated single-ended inputs in a QFN32 package, which is the best solution in space-saving applications. Each of the ...

Page 17

TS4982 Bridge tied load (BTL) means that each end of the load is connected to two single-ended output amplifiers. Therefore, we have: Single-ended output Single-ended output BTL output = V out1 The output power ...

Page 18

Application information The power delivered by the supply voltage is: Then, the power dissipated by each amplifier is: and the maximum value is obtained when: and its value is: This maximum value only depends on the power supply voltage and ...

Page 19

TS4982 4.4 Loudspeaker 3D effect enhancement The TS4982 features a 3D audio effect which can be programmed at three discrete levels (LOW, MEDIUM, HIGH) through input pins 3D1 and 3D0 which provide a digital interface. The correspondence between the logic ...

Page 20

Application information In this case we can consider that Rin equals Zin. So, for a desired cut-off frequency F is calculated as follows: The input impedance Zin is for the whole power supply voltage range, typically 30 kΩ . There ...

Page 21

TS4982 4.7 PC beep The PC beep input allows to send a system beep (for instance power-on self-test error code) through the amplifiers to the loudspeaker or (and) headphone output. In the typical application (see Figure the signal appear on ...

Page 22

Application information 4.8 Decoupling and charge pump capacitors Only a power supply decoupling capacitor Cs and a bias voltage decoupling capacitor Cb are needed to correctly decouple the TS4982. 4.8.1 Decoupling capacitors Cs and Cb Cs has a particular influence ...

Page 23

TS4982 4.8.2 Charge pump capacitors Cp and Cps A proper selection of the charge pump capacitors Cp and Cps is necessary to generate an efficient negative voltage by the internal charge pump without a negative impact on the audio performance. ...

Page 24

Application information 4.10 Standby time The time to disable the dedicated part into the standby mode since the level of the dedicated standby pins are changed (HDEN from "1" to "0", SPKREN from "0" to "1") is called the standby ...

Page 25

TS4982 4.13 PCB layout recommendations The TS4982 can delivery 2 W into a 4 Ω load at 1% THD+N. To reach this output power value, you should follow these few recommendations during the design phase of the PCB. ● Use ...

Page 26

Package information 5 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ...

Page 27

TS4982 5.1 QFN32 package information Figure 46. QFN32 package mechanical drawing Table 14. QFN32 package mechanical data Ref ddd Dimensions Millimeters Min. Typ. Max. 0.80 ...

Page 28

Package information Figure 47. Footprint recommendation 28/31 3.2 mm 0.45 mm 5.4 mm Doc ID 14527 Rev 2 TS4982 0.65 mm ...

Page 29

TS4982 6 Ordering information Table 15. Order code Order code TS4982IQT Temperature range Package -40°C to +85°C QFN32 Doc ID 14527 Rev 2 Ordering information Packaging Marking Tape & reel K982 29/31 ...

Page 30

Revision history 7 Revision history Table 16. Document revision history Date 18-Mar-2008 16-Jun-2009 30/31 Revision 1 Initial release. 2 Document status promoted from target specification to full datasheet. Doc ID 14527 Rev 2 TS4982 Changes ...

Page 31

... TS4982 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...