TS4909IQT STMicroelectronics, TS4909IQT Datasheet - Page 23

• Manufacturer Part Number: TS4909IQT
• Description: IC AMP AUDIO .158W STER AB 10DFN
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4909IQT

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 158mW x 2 @ 16 Ohm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Features: Depop, Standby
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Audio Amplifier Function: Headphone
• Total Harmonic Distortion: 0.3@16Ohm@90mW%
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Supply Current (max): 4.8@5VmA
• Power Supply Requirement: Single
• Power Dissipation: 1.79W
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 72dB
• Single Supply Voltage (min): 2.2V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 10
• Package Type: DFN
• For Use With: 497-6380 - BOARD DEMO FOR TS4909Q
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5992-2

TS4909
Note:
4.3
Note:
Figure 78. Lower cut-off frequency vs. input
100
10k
10
1k
1
Lower cut-off frequency
The lower cut-off frequency F
single-ended configuration, F
The input capacitor C
first-order high-pass filter. Assuming that F
3dB attenuation), the minimum value of C
In the single-ended configuration, the capacitor C
equivalent to a first-order high-pass filter. Assuming that F
amplified (with a 3dB attenuation), the minimum value of C
If F
order high-pass filter on the input and the 1st-order high-pass filter on the output create a
2nd-order high-pass filter in the audio signal path with an attenuation 6dB on F
off of 40db
Gain using the typical application schematics
In the flat region (no C
The gain A
The configuration (either single-ended or phantom ground) has no effect on the value of the
gain.
capacitor
CL
is kept the same for calculation purposes, it must be taken in account that the 1st-
10
V
Rin=10k
⁄
is:
Cin (nF)
decade.
Ω
Rin=20k
100
in
Rin=50k
in
Ω
in series with the input resistor R
effect), the output voltage of a channel is:
Rin=100k
Ω
V
CL
CL
OUT
depends on output capacitors C
of the TS4909 depends on input capacitors C
Ω
C
1000
=
C
out
V
in
IN
=
Figure 79. Lower cut-off frequency vs. output
A
=
⋅
in
V
--------------------------------------
2π
CL
--------------------------------------- -
2π
100
10k
⎛
⎝
10
1k
is:
–
=
0.1
⋅
R
------------- -
⋅
is the lowest frequency to be amplified (with a
R
–
feed
F
R
------------- -
F
in
1
CL
R
CL
feed
1
out
in
⎞
⎠
⋅
⋅
=
in series with the load resistor R
R
capacitor
R
V
L
in
IN
in
1
⋅
CL
of the amplifier is equivalent to a
out
A
is the lowest frequency to be
V
is:
out1,2
Cout
Application information
10
R
(
L
as well.
μ
=16
F
)
Ω
R
L
=32
R
Ω
100
L
in1,2
=300
CL
R
and a roll-
. In the
Ω
L
=600
L
is
Ω
23/32
1000