IC AMP AUDIO PWR 2.8W MONO 8DFN

TS4962IQT

Manufacturer Part NumberTS4962IQT
DescriptionIC AMP AUDIO PWR 2.8W MONO 8DFN
ManufacturerSTMicroelectronics
TypeClass D
TS4962IQT datasheet
 


Specifications of TS4962IQT

Output Type1-Channel (Mono)Max Output Power X Channels @ Load2.8W x 1 @ 4 Ohm
Voltage - Supply2.4 V ~ 5.5 VFeaturesDepop, Differential Inputs, Standby, Thermal Protection
Mounting TypeSurface MountPackage / Case8-DFN
ProductClass-DOutput Power2 W
Available Set Gain6 dBCommon Mode Rejection Ratio (min)57 dB
Thd Plus Noise1 %Operating Supply Voltage3 V, 5 V
Supply Current2.3 mAMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMTAudio Load Resistance8 Ohms
Input Signal TypeDifferentialMinimum Operating Temperature- 40 C
Output Signal TypeDifferentialSupply TypeSingle
Supply Voltage (max)5.5 VSupply Voltage (min)2.5 V
For Use With497-6265 - BOARD EVAL FOR TS4962MEIJTLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-5993-2  
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2.8 W filter-free mono class D audio power amplifier
Features
Operating from V
= 2.4 V to 5.5 V
CC
Standby mode active low
Output power: 2.8 W into 4 Ω and 1.7 W into
8 Ω with 10% THD+N maximum and 5 V power
supply
Output power: 2.2 W at 5 V or 0.7 W at 3.0 V
into 4 Ω with 1% THD+N maximum
Output power: 1.4 W at 5 V or 0.5 W at 3.0 V
into 8 Ω with 1% THD+N maximum
Adjustable gain via external resistors
Low current consumption 2 mA at 3 V
Efficiency: 88% typical
Signal to noise ratio: 85 dB typical
PSRR: 63 dB typical at 217 Hz with 6 dB gain
PWM base frequency: 280 kHz
Low pop & click noise
Thermal shutdown protection
Available in DFN8 3 x 3 mm package
Applications
Cellular phones
PDAs
Notebook PCs
Description
The TS4962 is a differential class-D BTL power
amplifier. It can drive up to 2.2 W into a 4 Ω load
and 1.4 W into an 8 Ω load at 5 V. It achieves
outstanding efficiency (88% typ.) compared to
standard AB-class audio amps.
January 2010
DFN8 3 x 3 mm
TS4962IQT pinout
1
1
2
2
3
3
4
4
The gain of the device can be controlled via two
external gain setting resistors. Pop & click
reduction circuitry provides low on/off switch noise
while allowing the device to start within 5 ms. A
standby function (active low) enables the current
consumption to be reduced to 10 nA typical.
Doc ID 10968 Rev 8
TS4962
8
8
7
7
EXPOSED
EXPOSED
6
6
PAD
PAD
5
5
1/44
www.st.com
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TS4962IQT Summary of contents

  • Page 1

    ... Notebook PCs Description The TS4962 is a differential class-D BTL power amplifier. It can drive up to 2.2 W into a 4 Ω load and 1.4 W into an 8 Ω load achieves outstanding efficiency (88% typ.) compared to standard AB-class audio amps. January 2010 DFN8 TS4962IQT pinout The gain of the device can be controlled via two external gain setting resistors. Pop & ...

  • Page 2

    Contents Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Application overview . . . . . . . . . . . . . . ...

  • Page 3

    TS4962 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol V Supply voltage CC V Input voltage i T Operating free air temperature range oper T Storage temperature stg T Maximum junction temperature j Thermal resistance ...

  • Page 4

    Absolute maximum ratings and operating conditions Table 3. Operating conditions Symbol V Supply voltage CC V Common mode input voltage range IC Standby voltage input: V Device ON STBY Device OFF R Load resistor L Thermal resistance junction to ambient ...

  • Page 5

    TS4962 2 Application overview Table 4. External component information Component Input capacitor Table 5. Pin description Pin number Functional description Bypass supply capacitor. Install as close as possible ...

  • Page 6

    Application overview Figure 1. Typical application schematics In+ GND Differential In- GND Vcc In+ GND GND + Differential Input - In- Input capacitors are optional GND 6/44 Vcc Stdby 1 Internal Bias 150k GND Rin + 4 - In- Input ...

  • Page 7

    TS4962 3 Electrical characteristics Table 6. Electrical characteristics at V with GND = Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage ...

  • Page 8

    Electrical characteristics Table 6. Electrical characteristics at V with GND = (continued) Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R ...

  • Page 9

    TS4962 Table 7. Electrical characteristics amb Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage input signal, R Output power ...

  • Page 10

    Electrical characteristics Table 7. Electrical characteristics amb Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R Unweighted R A-weighted R Unweighted ...

  • Page 11

    TS4962 Table 8. Electrical characteristics at V with GND = Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage input signal, R ...

  • Page 12

    Electrical characteristics Table 8. Electrical characteristics at V with GND = (continued) Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R ...

  • Page 13

    TS4962 Table 9. Electrical characteristics at V with GND = Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage input signal, R ...

  • Page 14

    Electrical characteristics Table 9. Electrical characteristics at V with GND = (continued) Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R ...

  • Page 15

    TS4962 Table 10. Electrical characteristics at V with GND = Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage input signal, R ...

  • Page 16

    Electrical characteristics Table 10. Electrical characteristics at V with GND = (continued) Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R ...

  • Page 17

    TS4962 Table 11. Electrical characteristics at V with GND = Symbol Supply current input signal, no load Standby current I STBY No input signal, V Output offset voltage input signal, R ...

  • Page 18

    Electrical characteristics Table 11. Electrical characteristics at V with GND = (continued) Symbol V Output voltage noise kHz Unweighted R A-weighted R Unweighted R A-weighted R ...

  • Page 19

    TS4962 3.1 Electrical characteristics curves The graphs shown in this section use the following abbreviations μ μH = pure resistor + very low series resistance inductor ● Filter = LC output filter (1 µF ...

  • Page 20

    Electrical characteristics Current consumption vs. power Figure 4. supply voltage 2.5 No load Tamb=25 ° C 2.0 1.5 1.0 0.5 0 Power Supply Voltage (V) Figure 6. Current consumption vs. standby voltage 2.0 1.5 1.0 0.5 0.0 ...

  • Page 21

    TS4962 Figure 10. Efficiency vs. output power 100 80 Efficiency 60 40 Power Dissipation 20 0 0.0 0.2 0.4 0.6 0.8 Output Power (W) Figure 12. Output power vs. power supply voltage 3 Ω + ≥ 15 ...

  • Page 22

    Electrical characteristics Figure 16. PSRR vs. frequency 0 Vripple = 200mVpp -10 Inputs = Grounded G = 6dB, Cin = 4.7 μ Ω + Filter Δ R/R ≤ 0.1% -30 Tamb = 25 ° C ...

  • Page 23

    TS4962 Figure 22. CMRR vs. frequency 0 RL=4 Ω μ H G=6dB Δ Vicm=200mVpp -20 Δ R/R ≤ 0.1% Cin=4.7 μ F Vcc=5V, 3.6V, 2.5V Tamb = 25 ° C -40 -60 100 1000 20 Frequency (Hz) Figure ...

  • Page 24

    Electrical characteristics Figure 28. THD+N vs. output power Ω μ 100Hz Vcc=3. 6dB BW < 30kHz Vcc=2.5V 1 Tamb = 25 ° C 0.1 0.01 1E-3 0.01 Output Power ...

  • Page 25

    TS4962 Figure 34. THD+N vs. output power Ω μ 1kHz G = 6dB Vcc=3.6V BW < 30kHz Tamb = 25 ° C Vcc=2.5V 1 0.1 1E-3 0.01 Output Power (W) Figure ...

  • Page 26

    Electrical characteristics Figure 40. THD+N vs. frequency 10 RL=4 Ω μ H G=6dB Bw < 30kHz Vcc=2.5V 1 Tamb = 25 ° C Po=0.35W 0.1 0.01 50 100 1000 Frequency (Hz) Figure 42. THD+N vs. frequency 10 RL=8 ...

  • Page 27

    TS4962 Figure 46. THD+N vs. frequency 10 RL=8 Ω μ H G=6dB Bw < 30kHz Vcc=2.5V 1 Tamb = 25 ° C Po=0.1W 0.1 0.01 50 100 1000 Frequency (Hz) Figure 48. Gain vs. frequency 8 6 Vcc=5V, ...

  • Page 28

    Electrical characteristics Figure 52. Gain vs. frequency 8 6 Vcc=5V, 3.6V, 2.5V 4 RL=8 Ω μ H G=6dB 2 Vin=500mVpp Cin=1 μ F Tamb = 25 ° 100 1000 Frequency (Hz) Figure 54. Gain vs. ...

  • Page 29

    TS4962 Figure 58. Startup and shutdown times = 3V 6dB Vo1 Vo2 Standby Vo1-Vo2 Figure 60. Startup and shutdown times = 3V 6dB Vo1 Vo2 Standby Vo1-Vo2 Figure 59. ...

  • Page 30

    Application information 4 Application information 4.1 Differential configuration principle The TS4962 is a monolithic, fully differential input/output class D power amplifier. The TS4962 also includes a common-mode feedback loop that controls the output bias value to average ...

  • Page 31

    TS4962 4.3 Common-mode feedback loop limitations As explained previously, the common-mode feedback loop allows the output DC bias voltage to be averaged at V However, due page 4), the common-mode feedback loop can play its role only ...

  • Page 32

    Application information 4.5 Decoupling of the circuit A power supply capacitor, referred The TS4962 has a typical switching frequency at 250 kHz and output fall and rise time about 5 ns. Due to these very fast transients, ...

  • Page 33

    TS4962 4.9 Single-ended input configuration It is possible to use the TS4962 in a single-ended input configuration. However, input coupling capacitors are needed in this configuration. input application. Figure 61. Single-ended input typical application GND All formulas are identical except ...

  • Page 34

    Application information We have the following equations. In general, for mixed situations (single-ended and differential inputs best to use the same rule, that is, equalize impedance on both TS4962 inputs. 4.10 Output filter considerations The TS4962 is designed ...

  • Page 35

    TS4962 In the case where the distance between the TS4962 output and the speaker terminals is high possible to observe low frequency EMI issues due to the fact that the typical operating frequency is 250 kHz. In this ...

  • Page 36

    Application information 4.11.2 Example 2: one differential input plus one single-ended input Figure 65. Typical application schematic with one differential input and one single-ended input E1+ With (R in kΩ 36/44 Standby Stdby 1 Internal R2 Bias E2+ ...

  • Page 37

    TS4962 5 Demonstration board A demonstration board for the TS4962 is available. For more information about this demonstration board, refer to the application note AN2406 "TS4962IQ class D audio amplifier evaluation board user guidelines" available on www.st.com. Figure 66. Schematic ...

  • Page 38

    Demonstration board Figure 68. Bottom layer Figure 69. Top layer 38/44 Doc ID 10968 Rev 8 TS4962 ...

  • Page 39

    TS4962 6 Recommended footprint Figure 70. Recommended footprint for TS4962 DFN package 2.2mm 1.8mm 0.8mm 1.4mm Doc ID 10968 Rev 8 Recommended footprint 0.35mm 0.65mm 39/44 ...

  • Page 40

    Package information 7 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 41

    TS4962 Figure 71. DFN8 exposed pad package mechanical drawing (pitch 0.65 mm) Table 12. DFN8 exposed pad package mechanical data (pitch 0.65 mm) Ref ...

  • Page 42

    ... Ordering information 8 Ordering information Table 13. Order codes Part number TS4962IQT 42/44 Temperature Package range -40°C, +85°C DFN8 Doc ID 10968 Rev 8 TS4962 Packaging Marking Tape & reel K962 ...

  • Page 43

    TS4962 9 Revision history Table 14. Document revision history Date 31-May-2006 16-Oct-2006 10-Jan-2007 18-Jan-2010 Revision Modified package information. Now includes only standard DFN8 5 package. Added curves in Section 3: Electrical evaluation board information in 6 Added recommended footprint. Added ...

  • Page 44

    ... 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. ...