TS4997IQT

Manufacturer Part NumberTS4997IQT
DescriptionIC AMP AUDIO 1W STER AB 16QFN
ManufacturerSTMicroelectronics
TypeClass AB
TS4997IQT datasheet
 


Specifications of TS4997IQT

Output Type2-Channel (Stereo)Max Output Power X Channels @ Load1W x 2 @ 8 Ohm
Voltage - Supply2.7 V ~ 5.5 VFeatures3D, Depop, Differential Inputs, Standby, Thermal Protection
Mounting TypeSurface MountPackage / Case16-QFN
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names497-5995-2
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Page 1/34

Download datasheet (543Kb)Embed
Next
Features
Operating range from V
= 2.7V to 5.5V
CC
1W output power per channel @ V
THD+N=1%, R
=8Ω
L
Ultra low standby consumption: 10nA typ.
80dB PSRR @ 217Hz with grounded inputs
High SNR: 106dB(A) typ.
Fast startup time: 45ms typ.
Pop&click-free circuit
Dedicated standby pin per channel
Lead-free QFN16 4x4mm package
Applications
Cellular mobile phones
Notebook and PDA computers
LCD monitors and TVs
Portable audio devices
Description
The TS4997 is designed for top-class stereo
audio applications. Thanks to its compact and
power-dissipation efficient QFN16 package with
exposed pad, it suits a variety of applications.
With a BTL configuration, this audio power
amplifier is capable of delivering 1W per channel
of continuous RMS output power into an 8Ω load
@ 5V.
3D effects enhancement is programmed through
a two digital input pin interface that allows more
flexibility on each output audio sound channel.
February 2007
2 x 1W differential input stereo audio amplifier
with programmable 3D effects
=5V,
CC
LIN-
LIN-
LIN+
LIN+
RIN+
RIN+
RIN-
RIN-
Each output channel (left and right), also has its
own external controlled standby mode pin to
reduce the supply current to less than 10nA per
channel. The device also features an internal
thermal shutdown protection.
The gain of each channel can be configured by
external gain setting resistors.
Rev 2
TS4997
QFN16 4x4mm
Pin connections (top view)
3D0
3D0
3D1
3D1
BYP VCC
BYP VCC
16 15
16 15
16 15
14
14
14
13
13
13
1
1
12
12
2
2
11
11
3
3
10
10
4
4
9
9
5
5
6
6
7
7
8
8
GND GND
GND GND
STBYR STBYL
STBYR STBYL
LOUT-
LOUT-
LOUT+
LOUT+
ROUT+
ROUT+
ROUT-
ROUT-
1/34
www.st.com
34

TS4997IQT Summary of contents

  • Page 1

    Features ■ Operating range from V = 2.7V to 5.5V CC ■ 1W output power per channel @ V THD+N=1%, R =8Ω L ■ Ultra low standby consumption: 10nA typ. ■ 80dB PSRR @ 217Hz with grounded inputs ■ High ...

  • Page 2

    Contents Contents 1 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 ...

  • Page 3

    TS4997 1 Typical application schematics Figure 1 shows a typical application for the TS4997 with a gain of +6dB set by the input resistors. Figure 1. Typical application schematics Optional Diff. input L- Cin1 P1 330nF Cin2 P2 Diff. input ...

  • Page 4

    Absolute maximum ratings 2 Absolute maximum ratings Table 2. 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 R Thermal resistance ...

  • Page 5

    TS4997 3 Electrical characteristics Table +5V, GND = 0V Symbol Supply current input signal, no load, left and right channel active (1) Standby current I STBY No input signal, V STBYL Output ...

  • Page 6

    Electrical characteristics Table +3.3V, GND = 0V Symbol Supply current input signal, no load, left and right channel active (1) Standby current I STBY No input signal, V STBYL Output offset voltage ...

  • Page 7

    TS4997 Table +2.7V, GND = 0V Symbol Supply current input signal, no load, left and right channel active (1) Standby current I STBY No input signal, V STBYL Output offset voltage V ...

  • Page 8

    Electrical characteristics Table 7. Index of graphics THD+N vs. output power THD+N vs. frequency PSRR vs. frequency PSRR vs. common mode input voltage CMRR vs. frequency CMRR vs. common mode input voltage Crosstalk vs. frequency SNR vs. power supply voltage ...

  • Page 9

    TS4997 Figure 2. THD+N vs. output power 10 Ω +6dB F = 1kHz μ < 125kHz 1 ° Tamb = 25 C Vcc=2.7V 0.1 0.01 1E-3 0.01 Output power (W) ...

  • Page 10

    Electrical characteristics Figure 8. THD+N vs. output power 10 Ω +6dB F = 10kHz μ < 125kHz 1 ° Tamb = 25 C Vcc=2.7V 0.1 0.01 1E-3 0.01 Output power ...

  • Page 11

    TS4997 Figure 14. THD+N vs. frequency 10 Ω +6dB μ < 125kHz ° Tamb = 0.1 0.01 100 Frequency (Hz) Figure 16. THD+N vs. frequency 10 Ω ...

  • Page 12

    Electrical characteristics Figure 20. PSRR vs. frequency 0 Vcc = 5V -10 Vripple = 200mVpp G = +6dB -20 μ μ Cin = 4.7 F -30 Inputs Grounded ° Tamb = 25 C -40 -50 3D ...

  • Page 13

    TS4997 Figure 26. PSRR vs. frequency 0 Vcc = 2.7V -10 Vripple = 200mVpp G = +6dB -20 μ μ Cin = 4.7 F -30 Inputs Grounded ° Tamb = 25 C -40 3D MEDIUM -50 ...

  • Page 14

    Electrical characteristics Figure 32. CMRR vs. frequency 0 Vcc = 3.3V ≥ Ω - +6dB Vic = 200mVpp -20 μ μ Cin = 4.7 F Tamb = 25°C -30 3D LOW 3D ...

  • Page 15

    TS4997 Figure 38. Crosstalk vs. frequency 0 Ω - +6dB -20 μ μ Cin = -30 3D Effect OFF ° Tamb = 25 C -40 -50 Vcc=5V -60 Vcc=3.3V ...

  • Page 16

    Electrical characteristics Figure 44. SNR vs. power supply voltage 110 108 106 3D OFF 104 102 3D MEDIUM 100 3D LOW Unweighted filter (20Hz to 20kHz 1kHz 3D HIGH ...

  • Page 17

    TS4997 Figure 50. Current consumption vs. standby voltage Both channels active One channel active Standby Voltage (V) Figure 52. Current consumption vs. standby voltage ...

  • Page 18

    Electrical characteristics Figure 56. Frequency response 14 μ Ω Cin=4.7 F, Rin=12k Ω Cin=680nF, Rin=12k μ Ω Cin=4.7 F, Rin=24k Ω Cin=330nF, Rin=24k 100 1000 ...

  • Page 19

    TS4997 Figure 62. Power dissipation vs. output power Figure 63. Power derating curves 400 350 300 250 200 150 Ω RL=16 100 100 150 200 250 Output Power (mW) Table 8. Output noise, T amb Conditions ...

  • Page 20

    Application information 4 Application information 4.1 General description The TS4997 integrates two monolithic full-differential input/output power amplifiers with two selectable standby pins dedicated for each channel. The gain of each channel is set by external input resistors. The TS4997 also ...

  • Page 21

    TS4997 Due to the tolerance on the internal 50kΩ feedback resistors, the differential gain will be in the range (no tolerance on R The difference of resistance between input resistors of each channel have direct influence on the PSRR, CMRR ...

  • Page 22

    Application information 4.5 Low frequency response The input coupling capacitors block the DC part of the input signal at the amplifier inputs. In the low frequency region, C pass filter with a -3dB cut-off frequency. expressed in Ω and C ...

  • Page 23

    TS4997 Table 9. 3D effect settings 3D effect level OFF LOW MEDIUM HIGH 4.7 Power dissipation and efficiency Assumptions: ● Load voltage and current are sinusoidal (V ● Supply voltage is a pure DC source (V The output voltage is: ...

  • Page 24

    Application information and the maximum value is obtained when: and its value is: Equation 5 Note: This maximum value is only dependent on the power supply voltage and load values. The efficiency is the ratio between the output power and ...

  • Page 25

    TS4997 T is calculated as follows: amb Equation 7 Therefore, the maximum allowable value for 150 - 1.266=42.4°C amb If a 4-layer PCB with vias is used, R value for T in this ...

  • Page 26

    Application information The C capacitor has particular influence on the THD+N at high frequencies (above 7kHz) S and an indirect influence on power supply disturbances. With a value for C expect THD+N performance similar to that shown in the datasheet. ...

  • Page 27

    TS4997 4.11 Shutdown time When the standby command is activated (both channels put into standby mode), the time required to put the two output stages of each channel in high impedance and the internal circuitry in shutdown mode is a ...

  • Page 28

    Application information Figure 67. Typical single-ended input application Diff. input L- Cin1 P1 330nF Cin2 330nF Diff. input R- Cin3 P2 330nF Cin4 330nF The component calculations remain the same for the gain. In single-ended input configuration, the formula is: ...

  • Page 29

    TS4997 Figure 68. PSRR measurement Cin1 4.7uF Cin2 4.7uF Cin3 4.7uF Cin4 4.7uF Principles of operation ● The DC voltage supply (V ● The AC sinusoidal ripple voltage (V ● No bypass capacitor C The PSRR value for each frequency ...

  • Page 30

    ... JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Figure 69. QFN16 package Figure 70 ...

  • Page 31

    TS4997 Figure 71. QFN16 4x4mm * The Exposed Pad is connected to Ground. * The Exposed Pad is connected to Ground. Figure 72. Footprint soldering pad QFN16 package information Dimensions Millimeters (mm) Ref Min A 0 0.18 ...

  • Page 32

    ... Ordering information 6 Ordering information Table 10. Order codes Part number TS4997IQT 32/34 Temperature range Package -40°C, +85°C QFN16 4x4mm TS4997 Packaging Marking Tape & reel Q997 ...

  • Page 33

    TS4997 7 Revision history Date 10-Jan-2007 20-Feb-2007 Revision 1 Preliminary data. 2 First release. Revision history Changes 33/34 ...

  • Page 34

    ... 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. ...