IC AMP AUDIO PWR 1W MONO 10DFN

TS4994IQT

Manufacturer Part NumberTS4994IQT
DescriptionIC AMP AUDIO PWR 1W MONO 10DFN
ManufacturerSTMicroelectronics
TypeClass AB
TS4994IQT datasheet
 

Specifications of TS4994IQT

Output Type1-Channel (Mono)Max Output Power X Channels @ Load1W x 1 @ 8 Ohm
Voltage - Supply2.5 V ~ 5.5 VFeaturesDepop, Differential Inputs, Short-Circuit and Thermal Protection, Standby
Mounting TypeSurface MountPackage / Case10-DFN
For Use With497-6396 - BOARD EVAL FOR LV TS4984IQT497-6395 - BOARD EVAL FOR LP DIFF TS4994IQTLead Free Status / RoHS StatusLead free / RoHS Compliant
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1W differential input/output audio power amplifier
Features
Differential inputs
Near-zero pop & click
100dB PSRR @ 217Hz with grounded inputs
Operating range from V
CC
1W rail-to-rail output power @ V
THD = 1%, F = 1kHz, with 8Ω load
90dB CMRR @ 217Hz
Ultra-low consumption in standby mode (10nA)
Selectable standby mode (active low or active
high)
Ultra fast startup time: 15ms typ.
Available in DFN10 3x3 (0.5mm pitch) &
MiniSO-8
All lead-free packages
Description
The TS4994 is an audio power amplifier capable
of delivering 1W of continuous RMS output power
into an 8Ω load @ 5V. Due to its differential inputs,
it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. An STBY
MODE pin allows the standby to be active HIGH
or LOW (except in the MiniSO-8 version). An
internal thermal shutdown protection is also
provided, making the device capable of sustaining
short-circuits.
The device is equipped with common mode
feedback circuitry allowing outputs to be always
Order codes
Part number
Temperature range
TS4994IQT
-40°C to +85°C
TS4994IST
December 2006
= 2.5V to 5.5V
= 5V,
CC
biased at V
mode voltage.
The TS4994 is designed for high quality audio
applications such as mobile phones and requires
few external components.
Applications
Mobile phones (cellular / cordless)
Laptop / notebook computers
PDAs
Portable audio devices
Package
DFN10
MiniSO-8
Rev 6
TS4994
with selectable standby
Pin connections (top view)
TS4994IQT - DFN10
1
1
1
STBY
STBY
10
10
10
V
V
O+
O+
2
2
2
V
V
9
9
9
V
V
IN -
IN -
DD
DD
3
3
3
8
8
8
STBY MODE
STBY MODE
N/C
N/C
V
V
4
4
4
7
7
7
GND
GND
IN +
IN +
5
5
5
6
6
6
BYPASS
BYPASS
V
V
O-
O-
TS4994IST - MiniSO-8
STBY
STBY
V
V
1
1
8
8
O+
O+
V
V
Vcc
Vcc
2
2
7
7
IN-
IN-
V
V
GND
GND
3
3
6
6
IN+
IN+
BYPASS
BYPASS
V
V
4
4
5
5
O-
O-
/2 regardless of the input common
CC
Packing
Marking
K994
Tape & reel
K994
1/35
www.st.com
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TS4994IQT Summary of contents

  • Page 1

    ... Applications ■ Mobile phones (cellular / cordless) ■ Laptop / notebook computers ■ PDAs ■ Portable audio devices Package DFN10 MiniSO-8 Rev 6 TS4994 with selectable standby Pin connections (top view) TS4994IQT - DFN10 STBY STBY ...

  • Page 2

    Contents Contents 1 Application component information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and ...

  • Page 3

    TS4994 1 Application component information Components C Supply bypass capacitor that provides power supply filtering Bypass capacitor that provides half supply filtering. b Feedback resistor that sets the closed loop gain in conjunction with R R feed A ...

  • Page 4

    Application component information Figure 2. Typical application, MiniSO-8 version Diff. input - Cin1 220nF Cin2 GND 220nF Diff. Input + Optional 4/35 Rfeed1 20k Rin1 2 Vin- 20k Rin2 3 Vin+ 20k 4 Bypass + Cb 1u Stdby GND 1 ...

  • Page 5

    TS4994 2 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol (1) V Supply voltage CC (2) V Input voltage i T Operating free air temperature range oper T Storage temperature stg T Maximum junction temperature j ...

  • Page 6

    Electrical characteristics 3 Electrical characteristics Table 3. Electrical characteristics for V specified) Symbol Supply current input signal, no load Standby current I No input signal, V STBY STBY No input signal, V STBY Differential output offset voltage ...

  • Page 7

    TS4994 Table 4. Electrical characteristics for V correlation measurements at 2.6V and 5V), GND = 0V, T specified) Symbol I Supply current no input signal, no load CC Standby current I No input signal, V STBY STBY No input signal, ...

  • Page 8

    Electrical characteristics Table 5. Electrical characteristics for V specified) Symbol Supply current input signal, no load Standby current I No input signal, V STBY STBY No input signal, V STBY Differential output offset voltage ...

  • Page 9

    TS4994 Figure 3. Current consumption vs. power supply voltage 4.0 No load Tamb=25 ° C 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 Power Supply Voltage (V) Figure 5. Current consumption vs. power supply voltage 3.5 3.0 ...

  • Page 10

    Electrical characteristics Figure 9. Power dissipation vs. output power 0.3 RL=8 Ω 0.2 0.1 RL=16 Ω 0.0 0.0 0.1 0.2 Output Power (W) Figure 11. Output power vs. power supply voltage 1 μ 1kHz ...

  • Page 11

    TS4994 Figure 15. Power derating curves 0.6 Nominal Value 0.4 AMR Value 0.2 0 Ambiant Temperature ( C) Figure 17. Open loop gain vs. frequency 60 Gain 40 20 Phase 0 Vcc = 3.3V - ...

  • Page 12

    Electrical characteristics Figure 21. Closed loop gain vs. frequency 10 Gain 0 -10 -20 Vcc = 2.6V - Ω + 500pF Tamb = 25 ° C -40 0 100 Frequency (kHz) Figure ...

  • Page 13

    TS4994 Figure 27. PSRR vs. frequency 0 -10 Vcc = 2.6V -20 Vripple = 200mVpp Inputs = Grounded - 2.5, Cin = 4.7 μ F -40 RL ≥ 8 Ω -50 Tamb = 25 ° C Cb=0.47 μ ...

  • Page 14

    Electrical characteristics Figure 33. PSRR vs. common mode input voltage 0 Vcc = 2.5V Vripple = 200mVpp Inputs Grounded - 217Hz -40 RL ≥ 8 Ω Tamb = 25 ° C -60 Cb=0 -80 -100 ...

  • Page 15

    TS4994 Figure 39. CMRR vs. frequency 0 Vcc = 2.6V -10 Vic = 200mVpp - 2.5, Cin = 470 μ ≥ 8 Ω -30 Tamb = 25 ° C -40 Cb=1 μ F -50 Cb=0.47 μ ...

  • Page 16

    Electrical characteristics Figure 45. THD+N vs. output power Ω 1kHz Vcc=2. μ < 125kHz Vcc=3.3V Tamb = 25 ° C Vcc=5V 0.1 0.01 1E-3 0.01 ...

  • Page 17

    TS4994 Figure 51. THD+N vs. output power Ω Vcc=2. 20Hz Vcc=3. μ < 125kHz Tamb = 25 ° C 0.1 Vcc=5V 0.01 1E-3 1E-3 0.01 ...

  • Page 18

    Electrical characteristics Figure 57. THD+N vs. output power Ω Vcc = F=20kHz < 125kHz Tamb = 25 ° C F=1kHz 0.1 F=20Hz 0.01 1E-3 0.01 Output Power ...

  • Page 19

    TS4994 Figure 63. THD+N vs. frequency Ω 7 μ < 125kHz Vcc=2.6V, Po=225mW 1 Tamb = 25 ° C 0.1 0.01 20 100 1000 Frequency (Hz) Figure 65. THD+N ...

  • Page 20

    Electrical characteristics Figure 69. Startup time vs. bypass capacitor 20 Tamb=25 ° C Vcc= Vcc=2.6V 0 0.0 0.4 0.8 1.2 Bypass Capacitor 20/35 Vcc=3.3V 1.6 2.0 TS4994 ...

  • Page 21

    TS4994 4 Application information 4.1 Differential configuration principle The TS4994 is a monolithic full-differential input/output power amplifier. The TS4994 also includes a common mode feedback loop that controls the output bias value to average for any ...

  • Page 22

    Application information the values following formula: with The result of the calculation must be in the range: If the result of the V used. Example: With V higher than 2.5V - 0.9V = 1.6V, so input coupling ...

  • Page 23

    TS4994 must introduce a mismatch factor (R performance. ● From 200Hz to 5kHz, the C compared with R this range, we can reach the PSRR performance of the TS4994 itself. ● From 5kHz to 20kHz, the C and the C ...

  • Page 24

    Application information The three following graphs show PSRR versus frequency and versus bypass capacitor C worst-case conditions ( Figure 70. PSRR vs. frequency (worst case conditions) 0 -10 Vcc = 5V, Vripple = 200mVpp - Cin = ...

  • Page 25

    TS4994 The two following graphs show typical applications of the TS4994 with a random selection of Δ four R/R values with a 0.1% tolerance. Figure 73. PSRR vs. frequency with random choice condition 0 -10 Vcc = 5V, Vripple = ...

  • Page 26

    Application information Figure 75. CMR vs. frequency (worst case conditions) 0 Vcc = 5V Vic = 200mVpp - Cin = 470 μ F Δ R/R = 0.1%, RL ≥ 8 Ω -20 Tamb = 25 ° C ...

  • Page 27

    TS4994 and Therefore, the average current delivered by the supply voltage is: Equation 1 The power delivered by the supply voltage is: Therefore, the power dissipated by each amplifier is: Equation 2 and the maximum value is obtained when: and ...

  • Page 28

    Application information To calculate the maximum ambient temperature T ● The value of the power supply voltage, V ● The value of the load resistor, R ● The R value for the package type thja Example 5V, R ...

  • Page 29

    TS4994 4.10 Shutdown time When the standby command is set, the time required to put the two output stages in high impedance and the internal circuitry in shutdown mode is a few microseconds. Note: In shutdown mode, the Bypass pin ...

  • Page 30

    Application information The component calculations remain the same, except for the gain. In single-ended input configuration, the formula is: 4.13 Demoboard A demoboard for the TS4994 is available designed for the TS4994 in the DFN10 package. However, we ...

  • Page 31

    ... 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. Package mechanical data ...

  • Page 32

    Package mechanical data ackage 5.1 DFN10 p Ref 32/35 Dimensions Millimeters Min. Typ. Max. 0.80 0.90 1.00 0.02 0.05 0.70 0.20 0.18 0.23 0.30 3.00 2.21 2.26 2.31 3.00 ...

  • Page 33

    TS4994 5.2 MiniSO-8 package Ref Dimensions Millimeters Min. Typ. Max. 1.1 0.05 0.10 0.15 0.78 0.86 0.94 0.25 0.33 0.40 0.13 0.18 0.23 2.90 3.00 3.10 4.75 4.90 ...

  • Page 34

    Revision history 6 Revision history Date 1-Sep-2003 1-Oct-2004 2-Jan-2005 2-Apr-2005 15-Nov- 2005 12-Dec-2006 34/35 Revision 1 Initial release. 2 Curves updated in the document. 4 Update mechanical data on flip-chip package. 4 Remove data on flip-chip package. 5 Mechanical data ...

  • Page 35

    ... TS4994 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. ...