f=1kHz, with an
8
Ω
load
■
0.3W
OUTPUT POWER @ Vcc=3.3V,
THD=1%, f=1kHz, with an
8
Ω
load
■
ULTRA LOW CONSUMPTION IN STANDBY
MODE
(10nA)
■
75dB
PSRR @ 217Hz from 5V to 2.6V
■
ULTRA LOW POP & CLICK
■
ULTRA LOW DISTORTION
(0.1%)
■
UNITY GAIN STABLE
■
AVAILABLE IN
MiniSO8 & SO8
DESCRIPTION
D
E
W
Standby
Bypass
V
IN
+
V
IN-
1
2
3
4
■
OPERATING FROM
V
CC
= 2.5V to 5.5V
■
0.7W
OUTPUT POWER @ Vcc=5V, THD=1%,
PIN CONNECTIONS
(top view)
TS4900IST - MiniSO8
S
8
7
6
5
8
7
6
5
IG
V
OUT
2
GND
V
CC
V
OUT1
300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER
WITH STANDBY MODE ACTIVE HIGH
NOT FOR NEW DESIGN
R
The TS4900 is an audio power amplifier designed
to provide the best price to power ratio while pre-
serving high audio quality.
Available in MiniSO8 & SO8 package, it is capable
of delivering up to 0.7W of continuous RMS ouput
power into an 8
Ω
load @ 5V.
-
et
l
)
(s
so
b
ct
u
d
-O
ro
s)
P
t(
te
uc
le
o
od
r
s
P
b
O
te
le
so
b
O
F
O
b
O
so
Standby
Bypass
V
IN
+
V
IN-
te
le
1
N
ro
P
E
uc
d
TS4900ID-TS4900IDT - SO8
P
e
od
r
V
OUT
2
GND
V
CC
V
OUT1
An externally controlled standby mode control re-
duces the supply current to less than 10nA. It also
includes an internal thermal shutdown protection.
The unity-gain stable amplifier can be configured
by external gain setting resistors.
N
O
TS4900 is also exhibiting an outstanding 0.1%
distortion level (THD) from a 5V supply for a Pout
of 200mW RMS.
2
T
3
4
TYPICAL APPLICATION SCHEMATIC
APPLICATIONS
■
Mobile Phones (Cellular / Cordless)
■
PDAs
■
Portable Audio Devices
ORDER CODE
Part Number
TS4900IS
TS4900ID
Temperature
Range
-40, +85°C
Package
S
D
•
•
S =
MiniSO Package (MiniSO) only available in Tape & Reel (ST)
D =
Small Outline Package (SO) - also available in Tape & Reel (DT)
March 2005
N
TS4900
s)
t(
s)
t(
uc
1/19
TS4900
ABSOLUTE MAXIMUM RATINGS
Supply voltage
1)
Input Voltage
2)
Operating Free Air Temperature Range
Storage Temperature
Maximum Junction Temperature
Thermal Resistance Junction to Ambient
3)
SO8
MiniSO8
Power Dissipation
V
CC
V
i
T
oper
T
stg
T
j
R
thja
6
N
Symbol
Parameter
Value
Unit
V
V
°C
°C
°C
°C/W
S
E
D
W
b
O
so
te
le
IG
150
175
215
G
ND
to V
CC
-40 to + 85
-65 to +150
Pd
ESD
Human Body Model
ESD
Machine Model
Latch-up Latch-up Immunity
Lead Temperature (soldering, 10sec)
1.
2.
3.
4.
N
All voltages values are measured with respect to the ground pin.
The magnitude of input signal must never exceed V
CC
+ 0.3V / G
ND
- 0.3V
Device is protected in case of over temperature by a thermal shutdown active @ 150°C.
Exceeding the power derating curves during a long period, will cause abnormal operation.
ro
P
Internally Limited
4)
2
200
Class A
250
E
uc
d
s)
t(
kV
V
°C
OPERATING CONDITIONS
Symbol
V
CC
V
ICM
Supply Voltage
R
Parameter
)-
(s
so
b
ct
u
d
-O
ro
s)
P
t(
te
uc
le
o
od
r
s
P
b
O
te
le
so
b
O
Common Mode Input Voltage Range
Standby Voltage Input :
Device ON
Device OFF
V
STB
R
L
F
et
l
O
P
e
od
r
Value
4 - 32
150
190
s)
t(
uc
Unit
V
V
V
2.5 to 5.5
G
ND
to V
CC
- 1.5V
G
ND
≤
V
STB
≤
0.5V
V
CC
- 0.5V
≤
V
STB
≤
V
CC
R
thja
1. This thermal resistance can be reduced with a suitable PCB layout (see Power Derating Curves)
N
2/19
O
Thermal Resistance Junction to Ambient
1)
SO8
MiniSO8
T
Load Resistor
Ω
°C/W
TS4900
ELECTRICAL CHARACTERISTICS
V
CC
=
+5V,
GND =
0V,
T
amb
= 25°C (unless otherwise specified)
Symbol
I
CC
I
STANDBY
Voo
Po
THD + N
PSRR
Parameter
Supply Current
No input signal, no load
Standby Current
1)
No input signal, Vstdby = Vcc, RL = 8
Ω
Output Offset Voltage
No input signal, RL = 8
Ω
Output Power
THD = 1% Max, f = 1kHz, RL = 8
Ω
Min.
Typ.
6
N
Max.
8
1000
20
Max.
8
1000
20
Unit
mA
nA
mV
W
S
E
D
so
te
le
IG
10
5
0.7
0.15
75
Total Harmonic Distortion + Noise
Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
Ω
Power Supply Rejection Ratio
2)
f = 217Hz, RL = 8
Ω,
RFeed = 22K
Ω,
Vripple = 200mV rms
Φ
M
GM
GBP
E
Phase Margin at Unity Gain
R
L
= 8
Ω
, C
L
= 500pF
Gain Margin
R
L
= 8
Ω
, C
L
= 500pF
Gain Bandwidth Product
R
L
= 8
Ω
N
ro
P
70
uc
d
W
s)
t(
%
dB
R
-
et
l
)
(s
so
b
ct
u
d
-O
ro
s)
P
t(
te
uc
le
o
od
r
s
P
b
O
te
le
so
b
O
V
CC
=
+3.3V,
GND =
0V,
T
amb
= 25°C (unless otherwise specified)
3)
Symbol
I
CC
Parameter
F
O
1. Standby mode is actived when Vstdby is tied to Vcc
2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz
b
O
P
e
Min.
od
r
2
Typ.
5.5
10
5
300
0.15
75
70
20
2
20
s)
t(
uc
Degrees
dB
MHz
Unit
mA
nA
mV
mW
%
dB
Degrees
dB
MHz
I
STANDBY
Voo
Po
N
THD + N
PSRR
GM
GBP
1. Standby mode is actived when Vstdby is tied to Vcc
2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz
3. All electrical values are made by correlation between 2.6V and 5V measurements
O
Φ
M
T
Supply Current
No input signal, no load
Standby Current
1)
No input signal, Vstdby = Vcc, RL = 8
Ω
Output Offset Voltage
No input signal, RL = 8
Ω
Output Power
THD = 1% Max, f = 1kHz, RL = 8
Ω
Total Harmonic Distortion + Noise
Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
Ω
Power Supply Rejection Ratio
2)
f = 217Hz, RL = 8
Ω,
RFeed = 22K
Ω,
Vripple = 200mV rms
Phase Margin at Unity Gain
R
L
= 8
Ω
, C
L
= 500pF
Gain Margin
R
L
= 8
Ω
, C
L
= 500pF
Gain Bandwidth Product
R
L
= 8
Ω
3/19
TS4900
ELECTRICAL CHARACTERISTICS
V
CC
=
2.6V,
GND =
0V,
T
amb
= 25°C (unless otherwise specified)
Symbol
I
CC
I
STANDBY
Voo
Po
THD + N
PSRR
Parameter
Supply Current
No input signal, no load
Standby Current
1)
No input signal, Vstdby = Vcc, RL = 8
Ω
Output Offset Voltage
No input signal, RL = 8
Ω
Output Power
THD = 1% Max, f = 1kHz, RL = 8
Ω
Min.
Typ.
5.5
10
5
180
0.15
75
N
Max.
8
1000
20
Unit
mA
nA
mV
E
S
D
so
te
le
IG
ro
P
70
20
2
Power Supply Rejection Ratio
2)
f = 217Hz, RL = 8
Ω,
RFeed = 22K
Ω,
Vripple = 200mV rms
Phase Margin at Unity Gain
R
L
= 8
Ω
, C
L
= 500pF
Gain Margin
R
L
= 8
Ω
, C
L
= 500pF
Gain Bandwidth Product
R
L
= 8
Ω
W
Total Harmonic Distortion + Noise
Po = 200mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
Ω
Φ
M
GM
GBP
E
uc
d
s)
t(
mW
%
R
-
et
l
)
(s
so
b
ct
u
d
-O
ro
s)
P
t(
te
uc
le
o
od
r
s
P
b
O
te
le
so
b
O
Components
Rin
1. Standby mode is actived when Vstdby is tied to Vcc
2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz
F
O
b
O
P
e
od
r
s)
t(
uc
dB
Degrees
dB
N
MHz
Functional Description
O
Cin
Rfeed
Cs
Cb
Cfeed
Rstb
Gv
N
4/19
REMARKS
1.
All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 100µF.
2.
The standby response time is about 1µs.
T
Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also
forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin))
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal
Feed back resistor which sets the closed loop gain in conjunction with Rin
Supply Bypass capacitor which provides power supply filtering
Bypass pin capacitor which provides half supply filtering
Low pass filter capacitor allowing to cut the high frequency
(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))
Pull-up resistor which fixes the right supply level on the standby pin
Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)
TS4900
Fig. 1 : Open Loop Frequency Response
0
60
Gain
Vcc = 5V
RL = 8
Ω
Tamb = 25
°
C
-20
-40
-60
Phase (Deg)
Fig. 2 : Open Loop Frequency Response
N
Gain
0
-20
-40
-60
Phase (Deg)
40
Gain (dB)
40
Phase
Gain (dB)
Phase
20
-80
-100
-120
IG
od
60
Vcc = 5V
ZL = 8
Ω
+ 560pF
Tamb = 25
°
C
-80
-100
-120
-140
-160
-180
20
0
-140
-160
-20
-180
-200
D
-20
E
0
S
1
10
100
1000
Frequency (kHz)
10000
-40
0.3
1
10
100
Frequency (kHz)
1000
10000
-220
-40
0.3
E
Fig. 3 : Open Loop Frequency Response
80
60
40
Gain (dB)
Fig. 4 : Open Loop Frequency Response
80
60
40
20
0
N
0
Gain
Vcc = 33V
RL = 8
Ω
Tamb = 25
°
C
-20
-40
-60
-80
Phase
20
0
-100
-120
-140
-160
-180
-200
-220
-240
)-
(s
so
b
ct
u
d
-O
ro
s)
P
t(
te
uc
le
o
od
r
s
P
b
O
te
le
so
b
O
-20
O
b
O
Gain (dB)
Phase (Deg)
Phase
-100
-120
-140
-160
-180
-200
-220
-240
F
-20
te
le
10
T
-40
0.3
1
10
100
1000
Frequency (kHz)
10000
-40
0.3
1
100
1000
Frequency (kHz)
10000
Fig. 5 : Open Loop Frequency Response
80
60
40
20
0
O
Fig. 6 : Open Loop Frequency Response
80
60
40
20
0
0
Gain
Vcc = 2.6V
ZL = 8
Ω
+ 560pF
Tamb = 25
°
C
-20
-40
-60
-80
-100
-120
-140
-160
-180
-200
-220
10
100
1000
Frequency (kHz)
10000
-240
Phase (Deg)
N
0
Gain
Vcc = 2.6V
RL = 8
Ω
Tamb = 25
°
C
-20
-40
-60
-80
Gain (dB)
Phase
Phase (Deg)
Gain (dB)
-100
-120
-140
-160
-180
-200
-220
-240
Phase
-20
-20
-40
0.3
1
10
100
1000
Frequency (kHz)
10000
-40
0.3
1
5/19
Phase (Deg)
so
R
te
le
Gain
ro
P
uc
d
W
s)
t(
-200
-220
r
P
Vcc = 3.3V
ZL = 8
Ω
+ 560pF
Tamb = 25
°
C
s)
t(
uc
0
-20
-40
-60
-80
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