STMicroelectronics TS419 Datasheet
Reklama
Reklama
TS419, TS421
Datasheet
360 mW mono amplifier with standby mode
Standby
Bypass
V
IN-
3
4
1
2
TS419IST : MiniSO8
8
7
6
5
V
OUT
2
GND
V
CC
V
OUT1
GND
V
OUT
2
Standby
Bypass
3
4
1
2
TS421IQT : DFN8
8
7
6
5
V
CC
V
OUT1
V
IN-
Maturity status link
TS3431
Features
• Operating from V
CC
= 2 V to 5.5 V
• Standby mode active high (TS419) or low (TS421)
• Output power into 16 Ω: 367 mW @ 5 V with 10% THD+N max or 295 mW @ 5
V and 110 mW @ 3.3 V with 1% THD+N max.
• Low current consumption: 2.5 mA max.
• High signal-to-noise ratio: 95 dB (A) at 5 V
• PSRR: 56 dB typ. at 1 kHz, 46 dB at 217 Hz
• Short-circuit limitation
• ON/OFF click reduction circuitry
• Available in MiniSO8 and DFN 3x3
Applications
• 16/32 Ω earpiece or receiver speaker driver
• Mobile and cordless phones (analog / digital)
• PDAs & computers
• Portable appliances
Description
The TS419/TS421 is a monaural audio power amplifier driving in BTL mode a 16 or
32 Ω earpiece or receiver speaker. The main advantage of this configuration is to get rid of bulky output capacitors.
Capable of descending to low voltages, it delivers up to 220 mW per channel (into 16
Ω loads) of continuous average power with 0.2% THD+N in the audio bandwidth from a 5 V power supply.
An externally controlled standby mode reduces the supply current to 10 nA (typ.).
The TS419 / TS421 can be configured by external gain-setting resistors.
DS3048 - Rev 5 - May 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
1
TS419, TS421
Maximum ratings
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
V
CC
V i
T stg
T j
Input voltage
Parameter
Storage temperature
Maximum junction temperature
Value
6
-0.3 V to V
CC
+0.3 V
-65 to +150
150
Unit
V
V
°C
°C
R thja
P d
ESD
ESD
Latch-up
Thermal resistance junction-to-ambient
MiniSO8
DFN8
Power dissipation
MiniSO8
DFN8
Human body model (pin to pin): TS419
Machine Model - 220 pF - 240 pF (pin to pin)
Latch-up Immunity (All pins)
Lead temperature (soldering, 10 s)
Output short-circuit to V
CC
or GND
215
70
0.58
1.79
1.5
100
200
250 continuous
°C/W
W kV
V mA
°C
1. All voltage values are measured with respect to the ground pin.
2. Pd has been calculated with Tamb = 25 °C, Tj = 150 °C.
3. TS419 stands 1.5 KV on all pins except standby pin which stands 1 KV
4. Attention must be paid to continous power dissipation (V
DD time period is dramatically reducing product life expectancy.
x 300 mA). Exposure of the IC to a short circuit for an extended
Symbol
V
CC
R
L
T oper
C
L
V
ICM
V
STB
R thja
Table 2. Operating conditions
Parameter
Supply voltage
Load resistor
Operating free air temperature range
Load capacitor
R
L
= 16 to 100 Ω
R
L
> 100 Ω
Common mode input voltage range
Standby voltage input
TS421 ACTIVE / TS419 in STANDBY
TS421 in STANDBY / TS419 ACTIVE
Thermal resistance junction-to-ambient
MiniSO8
DFN8
Value
2 to 5.5
≥ 16
-40 to +85
400
100
GND to V
CC
- 1 V
1.5 ≤ V
STB
≤ V
CC
GND ≤ V
STB
≤ 0.4
190
41
V
V
Unit
V
Ω
°C pF
°C/W
DS3048 - Rev 5 page 2/47
TS419, TS421
Maximum ratings
Symbol
T wu
Parameter
Wake-up time from standby to active mode (Cb = 1 μF)
Value
≥ 0.12
Unit s
1. The minimum current consumption (I
STANDBY
) is guaranteed at V
CC
(TS419) or GND (TS421) for the whole temperature range.
2. When mounted on a 4-layer PCB.
3. For more details on T
WU
, please refer to application note section on Wake-up time page 28.
DS3048 - Rev 5 page 3/47
2 Typical application schematics
Figure 1. Application schematics
TS419, TS421
Typical application schematics
Components
R
IN
C
IN
R
FEED
C
S
C
B
Table 3. Application components information
Functional description
Inverting input resistor which sets the closed loop gain in conjunction with R
FEED
. This resistor also forms a high pass filter with C
IN
(f cl
= 1 / (2 x P i
x R
IN
x C
IN
)).
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal.
Feedback resistor which sets the closed loop gain in conjunction with R
IN
Gain= 2 x R
FEED
/ R
IN
.
. A
V
= Closed Loop
Supply bypass capacitor which provides power supply filtering.
Bypass capacitor which provides half supply filtering.
DS3048 - Rev 5 page 4/47
3
TS419, TS421
Electrical characteristics
Electrical characteristics
Table 4. Electrical characteristics V
CC
= +5 V, GND = 0 V, T amb
= 25 °C (unless otherwise specified)
Min.
Typ.
Max.
Unit
I
Symbol
I
V
CC
STANDBY
P
THD + N
PSRR
SNR ϕ
OO
O
M
GM
GBP
SR
Supply current
No input signal, no load
Parameter
Standby current
No input signal, V
STANDBY
= GND for TS421
No input signal, V
STANDBY
= V
CC
for TS419
Output offset voltage
No input signal, R
L
= 16 Ω or 32 Ω, R feed
= 20 kΩ
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 16 Ω
Total harmonic distortion + noise (Av = 2)
R
L
= 32 Ω, P out
= 150 mW, 20 Hz ≤ F ≤ 20 kHz
R
L
= 16 Ω, P out
= 220 mW, 20 Hz ≤ F ≤ 20 kHz
Power supply rejection ratio (Av = 2)
F = 1 kHz, V ripple
= 200 mVpp, input grounded, C b
= 1 μF
Signal-to-Noise Ratio (Filter Type A, Av = 2)
(R
L
= 32 Ω, THD +N < 0.5%, 20 Hz ≤ F ≤ 20 kHz)
Phase margin at unity gain
R
L
= 16 Ω, C
L
= 400 pF
Gain margin
R
L
= 16 Ω, C
L
= 400 pF
Gain bandwidth product
R
L
= 16 Ω
Slew rate
R
L
= 16 Ω
1. Guaranteed by design and evaluation.
166
240
50
85
6
10
5
190
207
258
270
295
367
0.15
0.2
56
98
58
18
1.1
0.4
8
1000
25 mA nA mV mW
% dB dB
Degrees dB
MHz
V/µS
DS3048 - Rev 5 page 5/47
TS419, TS421
Electrical characteristics
Note:
Table 5. Electrical characteristics V
CC
= +3.3 V, GND = 0 V, T amb
= 25 °C (unless otherwise specified)
Symbol Min.
Typ.
Max.
Unit
I
CC
I
STANDBY
V
OO
P
O
THD + N
PSRR
SNR ϕ
M
GM
GBP
SR
Parameter
Supply current
No input signal, no load
Standby current
No input signal, V
STANDBY
= GND for TS421
No input signal, V
STANDBY
= V
CC
for TS419
Output offset voltage
No input signal, R
L
= 16 Ω or 32 Ω, R feed
= 20 kΩ
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 16 Ω
Total harmonic distortion + noise (Av = 2)
R
L
= 32 Ω, P out
= 150 mW, 20 Hz ≤ F ≤ 20 kHz
R
L
= 16 Ω, P out
= 220 mW, 20 Hz ≤ F ≤ 20 kHz
Power supply rejection ratio (Av = 2)
F = 1 kHz, V ripple
= 200 mVpp, input grounded, C b
= 1 μF
Signal-to-Noise Ratio (Weighted A, Av = 2)
(R
L
= 32 Ω, THD +N < 0.5%, 20 Hz ≤ F ≤ 20 kHz)
Phase margin at unity gain
R
L
= 16 Ω, C
L
= 400 pF
Gain margin
R
L
= 16 Ω, C
L
= 400 pF
Gain bandwidth product
R
L
= 16 Ω
Slew rate
R
L
= 16 Ω
65
91
50
82
1.8
10
5
75
81
102
104
113
143
0.15
0.2
56
94
58
18
1.1
0.4
2.5
1000
25 mA nA mV mW
% dB dB
Degrees dB
MHz
V/µS
All electrical values are guaranted with correlation measurements at 2 V and 5 V.
DS3048 - Rev 5 page 6/47
TS419, TS421
Electrical characteristics
Note:
Table 6. Electrical characteristics V
CC
= +2.5 V, GND = 0 V, T amb
= 25 °C (unless otherwise specified)
Symbol Min.
Typ.
Max.
Unit
I
CC
I
STANDBY
V
OO
P
O
THD + N
PSRR
SNR ϕ
M
GM
GBP
SR
Parameter
Supply current
No input signal, no load
Standby current
No input signal, V
STANDBY
= GND for TS421
No input signal, V
STANDBY
= V
CC
for TS419
Output offset voltage
No input signal, R
L
= 16 Ω or 32 Ω, R feed
= 20 kΩ
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 16 Ω
Total harmonic distortion + noise (Av = 2)
R
L
= 32 Ω, P out
= 150 mW, 20 Hz ≤ F ≤ 20 kHz
R
L
= 16 Ω, P out
= 220 mW, 20 Hz ≤ F ≤ 20 kHz
Power supply rejection ratio (Av = 2)
F = 1 kHz, V ripple
= 200 mVpp, input grounded, C b
= 1 μF
Signal-to-Noise Ratio (Weighted A, Av = 2)
(R
L
= 32 Ω, THD +N < 0.5%, 20 Hz ≤ F ≤ 20 kHz)
Phase margin at unity gain
R
L
= 16 Ω, C
L
= 400 pF
Gain margin
R
L
= 16 Ω, C
L
= 400 pF
Gain bandwidth product
R
L
= 16 Ω
Slew rate
R
L
= 16 Ω
32
44
50
80
1.7
10
5
37
41
52
50
55
70
0.15
0.2
56
91
58
18
1.1
0.4
2.5
1000
25 mA nA mV mW
% dB dB
Degrees dB
MHz
V/µS
All electrical values are guaranted with correlation measurements at 2 V and 5 V.
DS3048 - Rev 5 page 7/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics
Table 7. Electrical characteristics V
CC
= +2 V, GND = 0 V, T amb
= 25 °C (unless otherwise specified)
Min.
Typ.
Max.
Unit
I
Symbol
I
V
CC
STANDBY
P
THD + N
PSRR
SNR ϕ
OO
O
M
GM
GBP
SR
Parameter
Supply current
No input signal, no load
Standby current
No input signal, V
STANDBY
= GND for TS421
No input signal, V
STANDBY
= V
CC
for TS419
Output offset voltage
No input signal, R
L
= 16 Ω or 32 Ω, R feed
= 20 kΩ
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 32 Ω
Output power
THD+N = 0.1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 1% Max, F = 1 kHz, R
L
= 16 Ω
Output power
THD+N = 10% Max, F = 1 kHz, R
L
= 16 Ω
Total harmonic distortion + noise (Av = 2)
R
L
= 32 Ω, P out
= 150 mW, 20 Hz ≤ F ≤ 20 kHz
R
L
= 16 Ω, P out
= 220 mW, 20 Hz ≤ F ≤ 20 kHz
Power supply rejection ratio (Av = 2)
F = 1 kHz, V ripple
= 200 mVpp, input grounded, C b
= 1 μF
Signal-to-Noise Ratio (Weighted A, Av = 2)
(R
L
= 32 Ω, THD +N < 0.5%, 20 Hz ≤ F ≤ 20 kHz)
Phase margin at unity gain
R
L
= 16 Ω, C
L
= 400 pF
Gain margin
R
L
= 16 Ω, C
L
= 400 pF
Gain bandwidth product
R
L
= 16 Ω
Slew rate
R
L
= 16 Ω
1. Guaranteed by design and evaluation.
19
24
49
80
1.7
10
5
20
23
30
26
30
40
0.1
0.15
54
89
58
20
1.1
0.4
2.5
1000
25 mA nA mV mW
% dB dB
Degrees dB
MHz
V/µS page 8/47
4
TS419, TS421
Electrical characteristics curves
Electrical characteristics curves
Figure 2. Open loop gain and phase vs. frequency
Figure 3. Open loop gain and phase vs. frequency
Vcc = 2 V
40
20
0
80
60
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
180
Vcc = 5V
RL = 8 Ω
Tamb = 25°C
1000
160
140
120
20
0
-20
10000
100
80
60
40
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
RL = 8 Ω
Tamb = 25°C
1000
20
0
-20
10000
100
80
60
40
180
160
140
120
Figure 4. Open loop gain and phase vs. frequency
Vcc = 5 V
Figure 5. Open loop gain and phase vs. frequency
ZL = 8 Ω
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 5V
ZL = 8 Ω +400pF
Tamb = 25°C
1000
20
0
-20
10000
100
80
60
40
180
160
140
120
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
ZL = 8 Ω +400pF
Tamb = 25°C
1000
40
20
0
-20
10000
180
160
140
120
100
80
60
DS3048 - Rev 5 page 9/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 6. Open loop gain and phase vs. frequency
RL = 16 Ω
Figure 7. Open loop gain and phase vs. frequency
RL = 16 Ω, Vcc = 2 V
40
20
0
80
60
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 5V
RL = 16 Ω
Tamb = 25°C
1000
180
160
140
20
0
-20
10000
120
100
80
60
40
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
RL = 16 Ω
Tamb = 25°C
1000
180
160
140
120
100
80
60
40
20
0
-20
10000
Figure 8. Open loop gain and phase vs. frequency
ZL = 16 Ω, Vcc = 5 V
Figure 9. Open loop gain and phase vs. frequency
ZL = 16 Ω, Vcc = 2 V
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 5V
ZL = 16 Ω +400pF
Tamb = 25°C
1000
20
0
-20
10000
80
60
40
180
160
140
120
100
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
ZL = 16 Ω +400pF
Tamb = 25°C
1000
40
20
0
-20
10000
180
160
140
120
100
80
60 page 10/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 10. Open loop gain and phase vs. frequency
RL = 32 Ω
Figure 11. Open loop gain and phase vs. frequency
RL = 32 Ω, Vcc = 2 V
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 5V
RL = 32 Ω
Tamb = 25°C
1000
40
20
0
-20
10000
180
160
140
120
100
80
60
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
RL = 32 Ω
Tamb = 25°C
1000
20
0
-20
10000
100
80
60
40
180
160
140
120
Figure 12. Open loop gain and phase vs. frequency
ZL = 32 Ω
Figure 13. Open loop gain and phase vs. frequency
ZL = 32 Ω, Vcc = 2 V
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 5V
ZL = 32 Ω +400pF
Tamb = 25°C
1000
20
0
-20
10000
100
80
60
40
180
160
140
120
80
60
40
20
0
-20
-40
0.1
Phase
1
Gain
10 100
Frequency (kHz)
Vcc = 2V
ZL = 32 Ω +400pF
Tamb = 25°C
1000
20
0
-20
10000
100
80
60
40
180
160
140
120 page 11/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 14. Current consumption vs. power supply voltage
2.0
No load
1.5
Ta=85°C
Ta=25°C Ta=-40°C
1.0
0.5
0.0
0 1 2 3
Power Supply Voltage (V)
4 5
Figure 15. Current consumption vs. standby voltage Vcc = 5 V
2.0
1.5
1.0
0.5
0.0
0
Ta=25°C
Ta=85°C
Ta=-40°C
1 2 3
Standby Voltage (V)
4
TS419
Vcc = 5V
No load
5
Figure 16. Current consumption vs. standby voltage Vcc = 3.3 V
2.0
1.5
1.0
0.5
0.0
0
Ta=25°C
Ta=85°C
Ta=-40°C
1 2
Standby Voltage (V)
TS419
Vcc = 3.3V
No load
3
Figure 17. Current consumption vs. standby voltage Vcc = 2 V
2.0
Ta=85°C
1.5
Ta=25°C
1.0
0.5
0.0
0 1
Ta=-40°C
TS419
Vcc = 2V
No load
2
Standby Voltage (V) page 12/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 18. Current consumption vs. standby voltage Vcc = 5 V (TS421)
1.0
0.5
0.0
0
2.5
Ta=85°C
2.0
1.5
1
Ta=25°C
Ta=-40°C
2 3
Standby Voltage (V)
4
TS421
Vcc = 5V
No load
5
Figure 19. Current consumption vs. standby voltage Vcc = 3.3 V (TS421)
2.0
Ta=25°C
1.5
Ta=85°C
1.0
Ta=-40°C
0.5
0.0
0 1 2
Standby Voltage (V)
TS421
Vcc = 3.3V
No load
3
Figure 20. Current consumption vs. standby voltage Vcc = 2 V (TS421)
2.0
Ta=85°C
1.5
Ta=25°C
1.0
0.5
0.0
0 1
Ta=-40°C
TS421
Vcc = 2V
No load
2
Standby Voltage (V)
Figure 21. Output power vs. power supply voltage
RL = 8 Ω
550
500
450
400
350
300
250
200
150
100
50
0
2.0
RL = 8 Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
2.5
3.0
THD+N=10%
3.5
THD+N=1%
4.0
Vcc (V)
THD+N=0.1%
4.5
5.0
5.5
page 13/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 22. Output power vs. power supply voltage
RL = 16 Ω
Figure 23. Output power vs. power supply voltage
RL = 32 Ω
500
450
400
350
300
250
200
150
100
50
0
2.0
RL = 16 Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
2.5
3.0
THD+N=10%
3.5
THD+N=1%
4.0
Vcc (V)
THD+N=0.1%
4.5
5.0
5.5
300
250
RL = 32 Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
200
THD+N=10%
THD+N=1%
150
100
THD+N=0.1%
50
0
2.0
2.5
3.0
3.5
4.0
Vcc (V)
4.5
5.0
5.5
Figure 24. Output power vs. power supply voltage
RL = 64 Ω
Figure 25. Output power vs. load resistor Vcc = 5 V
200
150
RL = 64 Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
100
50
THD+N=10%
THD+N=1%
THD+N=0.1%
0
2.0
2.5
3.0
3.5
4.0
Vcc (V)
4.5
5.0
5.5
500
450
400
350
300
250
200
150
100
50
0
8 16
THD+N=10%
THD+N=1%
Vcc = 5V
F = 1kHz
BW < 125kHz
Tamb = 25°C
THD+N=0.1%
24 32 40
Load Resistance ( W )
48 56 64 page 14/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 26. Output power vs. load resistor
Vcc = 3.3 V
200
150
THD+N=10%
THD+N=1%
Vcc = 3.3V
F = 1kHz
BW < 125kHz
Tamb = 25°C
100
50 THD+N=0.1%
0
8 16 24 32 40
Load Resistance ( W )
48 56 64
Figure 27. Output power vs. load resistor
Vcc = 2.5 V
100
90
80
70
60
50
40
30
20
10
0
8
THD+N=1%
THD+N=0.1%
THD+N=10%
Vcc = 2.5V
F = 1kHz
BW < 125kHz
Tamb = 25°C
16 24 32 40
Load Resistance ( W )
48 56 64
Figure 28. Output power vs. load resistor Vcc = 2 V
50
45
40
35
30
25
20
15
10
5
0
8
THD+N=10%
THD+N=0.1%
THD+N=1%
Vcc = 2V
F = 1kHz
BW < 125kHz
Tamb = 25°C
16 24 32 40
Load Resistance ( W )
48 56 64
Figure 29. Power dissipation vs. output power
Vcc = 5 V
200
100
0
0
600
500
Vcc=5V
F=1kHz
THD+N<1%
400
300
50
RL=8
RL=32
W
RL=16
W
W
100 150 200 250
Output Power (mW)
300 350 page 15/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 30. Power dissipation vs. output power
Vcc = 3.3 V
100
50
0
0
300
250
Vcc=3.3V
F=1kHz
THD+N<1%
200
150
30
RL=32 W
60 90 120
Output Power (mW)
RL=8
RL=16 W
150
W
Figure 31. Power dissipation vs. output power
Vcc = 2.5 V
80
60
40
20
140
120
Vcc=2.5V
F=1kHz
THD+N<1%
100
0
0 10 20
RL=32 Ω
30 40
Output Power (mW)
50
RL=8
RL=16 Ω
Ω
60
Figure 32. Power dissipation vs. output power
Vcc = 2 V
100
80
Vcc=2V
F=1kHz
THD+N<1%
60
40
20
0
0 5
RL=8
RL=16 Ω
Ω
RL=32 Ω
10 15 20
Output Power (mW)
25 30 35
Figure 33. Power derating curves page 16/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 34. Output voltage swing for one Amp. vs. power supply voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0
Tamb=25 ° C
Amps. in BTL
2.5
RL=32 Ω
RL=16
3.0
3.5
4.0
Power Supply Voltage (V)
Ω
4.5
RL=8 Ω
5.0
Figure 35. THD + N vs. output power RL = 8 Ω
10
1
RL = 8 Ω
F = 20Hz
Av = 2
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1E-3
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 36. THD + N vs. output power RL = 16 Ω
10
1
RL = 16 Ω
F = 20Hz
Av = 2
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1E-3
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 17/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 37. THD + N vs. output power RL = 32 Ω
10
1
RL = 32 Ω
F = 20Hz
Av = 2
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
0.01
1E-3
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 38. THD + N vs. output power RL = 8 Ω,
Av = 2
10
1
RL = 8 Ω
F = 1kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
0.1
Vcc=2.5V
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 39. THD + N vs. output power RL = 16 Ω,
Av = 2
10
1
RL = 16 Ω
F = 1kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 40. THD + N vs. output power RL = 32 Ω,
Av = 2
10
1
RL = 32 Ω
F = 1kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1E-3
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 18/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 41. THD + N vs. output power RL = 8 Ω,
Cb = 1 µF
10
1
RL = 8 Ω
F = 20kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C Vcc=2V
Vcc=2.5V
Figure 42. THD + N vs. output power RL = 16 Ω,
Cb = 1 µF
10
1
RL = 16 Ω
F = 20kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
0.1
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 43. THD + N vs. output power RL = 32 Ω,
Cb = 1 µF
10
1
RL = 32 Ω
F = 20kHz
Av = 2
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 44. THD + N vs. frequency RL = 8 Ω
0.1
RL=8 Ω
Av=2
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C
Vcc=2V, Po=28mW
0.01
20 100
Vcc=5V, Po=300mW
1000 10000 20k
Frequency (Hz) page 19/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 45. THD + N vs. frequency RL = 16 Ω
0.1
RL=16 Ω
Av=2
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C Vcc=2V, Po=20mW
Vcc=5V, Po=220mW
0.01
20 100 1000
Frequency (Hz)
10000 20k
Figure 46. THD + N vs. frequency RL = 32 Ω
0.1
RL=32 Ω
Av=2
Cb = 1 µ F
Bw < 125kHz
Tamb=25°C
0.01
20
Vcc=2V, Po=13mW
Vcc=5V, Po=150mW
100 1000
Frequency (Hz)
10000 20k
Figure 47. Signal to noise ratio vs. power supply voltage with unweighted filter (20 Hz to 20 kHz)
100
95
Av = 2
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
90
85
80
75
70
2.0
RL=32
RL=16 Ω
Ω
RL=8
2.5
3.0
3.5
4.0
Power Supply Voltage (V)
Ω
4.5
5.0
Figure 48. Signal to noise ratio vs. power supply voltage with weighted filter Type A
105
100
Av = 2
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
95
90
85
80
2.0
RL=32
RL=16 Ω
Ω
RL=8 Ω
2.5
3.0
3.5
4.0
Power Supply Voltage (V)
4.5
5.0
page 20/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
30
Figure 49. Noise floor Vcc = 5 V
20 Standby=OFF
10
Standby=ON
0
20 100 1000
Frequency (Hz)
RL>=16
Vcc=5V
Ω
Av=2
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
10000 20k
30
Figure 50. Noise floor Vcc = 2 V
20
10
Standby=OFF
Standby=ON
RL>=16 Ω
Vcc=2V
Av=2
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
0
20 100 1000
Frequency (Hz)
10000 20k
Figure 51. PSRR vs. input capacitor
0
-10
-20
-30
-40
-50
-60
-70
Cin = 1 µ F, 220nF
Vripple = 200mVpp
Av = 2, Vcc = 5V
Input = grounded
Cb = 1 µ F, Rin = 20k Ω
RL >= 16 Ω
Tamb = 25°C
100
Cin = 100nF
1000
Frequency (Hz)
10000 100000
Figure 52. PSRR vs. power supply voltage
-50
-60
-70
-80
0
-10
-20
-30
Vripple = 100mVrms
Rfeed = 20k Ω
Input = floating
Cb = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000 page 21/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 53. PSRR vs. bypass capacitor
Cb = Cin = 1 µF
0
-10
-20
-30
-40
-50
-60
-70
Vripple = 200mVpp
Av = 2
Input = Grounded
Cb = Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000
Figure 54. PSRR vs. bypass capacitor Cb = 4.7 µF
0
-10
-20
-30
Vripple = 200mVpp
Av = 2
Input = Grounded
Cb = 4.7
µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
-50
-60
-70
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000 10000
Frequency (Hz)
100000
Figure 55. PSRR vs. bypass capacitor Cb = 10 µF
0
-10
-20
-30
Vripple = 200mVpp
Av = 2
Input = Grounded
Cb = 10 µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
-50
-60
-70
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000 10000
Frequency (Hz)
100000
Figure 56. THD + N vs. output power RL = 8 Ω
10
1
RL = 8 Ω
F = 20Hz
Av = 4
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 22/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 57. THD + N vs. output power RL = 16 Ω
10
1
RL = 16 Ω
F = 20Hz
Av = 4
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1E-3
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 58. THD + N vs. output power RL = 32 Ω
10
1
RL = 32 Ω
F = 20Hz
Av = 4
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
0.01
1E-3
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 59. THD + N vs. output power RL = 8 Ω,
Av = 4
10
1
RL = 8 Ω
F = 1kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
Figure 60. THD + N vs. output power RL = 16 Ω,
Av = 4
10
1
RL = 16 Ω
F = 1kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 23/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 61. THD + N vs. output power RL = 32 Ω,
Av = 4
10
1
RL = 32 Ω
F = 1kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
0.01
1E-3
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 62. THD + N vs. output power RL = 8 Ω
10
1
RL = 8 Ω
F = 20kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
Figure 63. THD + N vs. output power RL = 16 Ω
10
1
RL = 16 Ω
F = 20kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
Figure 64. THD + N vs. output power RL = 32 Ω
10
1
RL = 32 Ω
F = 20kHz
Av = 4
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
0.1
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 24/47
DS3048 - Rev 5
Figure 65. THD + N vs. frequency RL = 8 Ω
0.1
RL=8 Ω
Av=4
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C
Vcc=2V, Po=28mW
TS419, TS421
Electrical characteristics curves
Figure 66. THD + N vs. frequency RL = 16 Ω
0.1
RL=16 Ω
Av=4
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C
Vcc=2V, Po=20mW
0.01
20 100
Vcc=5V, Po=300mW
1000 10000 20k
Frequency (Hz)
0.01
20 100
Vcc=5V, Po=220mW
1000
Frequency (Hz)
10000 20k
Figure 67. THD + N vs. frequency RL = 32 Ω
0.1
RL=32 Ω
Av=4
Cb = 1 µ F
Bw < 125kHz
Tamb=25°C
Vcc=5V, Po=150mW
Vcc=2V, Po=13mW
0.01
20 100 1000
Frequency (Hz)
10000 20k
Figure 68. Signal-to-noise ratio vs. power supply voltage with unweighted filter (20 Hz to 20 kHz)
90
85
Av = 4
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
RL=32 Ω
80
RL=8 Ω
75 RL=16 Ω
70
2.0
2.5
3.0
3.5
4.0
Power Supply Voltage (V)
4.5
5.0
page 25/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 69. Signal-to-noise ratio vs power supply voltage with weighted filter Type A
100
95
Av = 4
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
90
RL=32 Ω
85
80
75
2.0
RL=16 Ω
RL=8 Ω
5.0
2.5
3.0
3.5
4.0
Power Supply Voltage (V)
4.5
Figure 70. Noise floor Vcc = 5 V
40
30
20
10
0
20
Standby=OFF
Standby=ON
100 1000
Frequency (Hz)
RL>=16 Ω
Vcc=5V
Av=4
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
10000 20k
Figure 71. Noise floor Vcc = 2 V
40
30
20
10
0
20
Standby=OFF
Standby=ON
100 1000
Frequency (Hz)
RL>=16 Ω
Vcc=2V
Av=4
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
10000 20k
Figure 72. PSRR vs. power supply voltage
-50
-60
-70
-80
0
-10
-20
-30
Vripple = 100mVrms
Rfeed = 40k Ω
Input = floating
Cb = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
Vcc = 5V, 3.3V & 2.5V
100 1000
Vcc = 2V
Frequency (Hz)
10000 100000 page 26/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 73. PSRR vs. input capacitor
0
-10
-20
-30
-40
Cin = 1 µ F, 220nF
Vripple = 200mVpp
Av = 4, Vcc = 5V
Input = grounded
Cb = 1 µ F, Rin = 20k Ω
RL >= 16 Ω
Tamb = 25°C
-50
-60
100
Cin = 100nF
1000
Frequency (Hz)
10000 100000
Figure 74. PSRR vs. bypass capacitor
Cb = Cin = 1 µF
0
-10
-20
-30
-40
-50
-60
Vripple = 200mVpp
Av = 4
Input = Grounded
Cb = Cin = 1
RL >= 16 Ω
µ
Tamb = 25°C
F
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000 10000
Frequency (Hz)
100000
Figure 75. PSRR vs. bypass capacitor
Cb = Cin = 4.7 µF
0
-10
-20
-30
Vripple = 200mVpp
Av = 4
Input = Grounded
Cb = 4.7
µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
-50
-60
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000
Figure 76. PSRR vs. bypass capacitor
Cb = Cin = 10 µF
0
-10
-20
-30
Vripple = 200mVpp
Av = 4
Input = Grounded
Cb = 10 µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
-50
-60
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000 page 27/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 77. THD + N vs. output power RL = 8 Ω
10
1
RL = 8 Ω
F = 20Hz
Av = 8
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
0.1
Vcc=2V
Vcc=2.5V
Figure 78. THD + N vs. output power RL = 16 Ω
10
1
RL = 16 Ω
F = 20Hz
Av = 8
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C Vcc=2V
Vcc=2.5V
0.1
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
0.01
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 79. THD + N vs. output power RL = 32 Ω
10
1
RL = 32 Ω
F = 20Hz
Av = 8
Cb = 1 µ F
BW < 22kHz
Tamb = 25°C
Vcc=2V
0.1
Vcc=2.5V
0.01
1
Vcc=3.3V
1 0
Output Power (mW)
Vcc=5V
1 0 0
Figure 80. THD + N vs. output power RL = 8 Ω,
Av = 8
10
1
RL = 8 Ω
F = 1kHz
Av = 8
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 28/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 81. THD + N vs. output power RL = 16 Ω,
Av = 8
10
1
RL = 16 Ω
F = 1kHz
Av = 8
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
0.1
Figure 82. THD + N vs. output power RL = 32 Ω,
Av = 8
10
1
RL = 32 Ω
F = 1kHz
Av = 8
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C Vcc=2V
Vcc=2.5V
0.1
0.01
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
0.01
1
Vcc=3.3V
Vcc=5V
10
Output Power (mW)
100
Figure 83. THD + N vs. output power RL = 8 Ω,
Cb = 1 µF
10
RL = 8 Ω , F = 20kHz
Av = 8, Cb = 1 µ F
BW < 125kHz, Tamb = 25°C
Vcc=2V
Vcc=2.5V
1
Figure 84. THD + N vs. output power RL = 16 Ω,
Cb = 1 µF
10
RL = 16 Ω
F = 20kHz
Av = 8
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2.5V
1
Vcc=2V
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100 page 29/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 85. THD + N vs. output power RL = 32 Ω,
Cb = 1 µF
10
1
RL = 32 Ω
F = 20kHz
Av = 8
Cb = 1 µ F
BW < 125kHz
Tamb = 25°C
Vcc=2V
Vcc=2.5V
Figure 86. THD + N vs. frequency RL = 8 Ω
0.1
RL=8 Ω
Av=8
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C
Vcc=2V, Po=28mW
0.1
1
Vcc=3.3V
10
Output Power (mW)
Vcc=5V
100
20 100 1000
Vcc=5V, Po=300mW
10000 20k
Frequency (Hz)
Figure 87. THD + N vs. frequency RL = 16 Ω
0.1
RL=16 Ω
Av=8
Cb = 1 µ F
Bw < 125kHz
Tamb = 25°C
Vcc=2V, Po=20mW
Figure 88. THD + N vs. frequency RL = 32 Ω
0.1
RL=32 Ω
Av=8
Cb = 1 µ F
Bw < 125kHz
Tamb=25°C
Vcc=2V, Po=13mW
0.01
20 100
Vcc=5V, Po=220mW
1000 10000 20k
Frequency (Hz)
0.01
20
Vcc=5V, Po=150mW
100 1000
Frequency (Hz)
10000 20k page 30/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 89. Signal to noise ratio vs. power supply voltage with unweighted filter (20 Hz to 20 kHz)
75
70
65
90
85
Av = 8
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
80
60
2.0
2.5
RL=32
RL=16 Ω
Ω
RL=8
3.0
3.5
4.0
Power Supply Voltage (V)
Ω
4.5
5.0
Figure 90. Signal to noise ratio vs. power supply voltage with weighted filter Type A
80
75
95
90
Av = 8
Cb = 1 µ F
THD+N < 0.5%
Tamb = 25°C
85
70
2.0
RL=32
RL=16 Ω
Ω
RL=8 Ω
2.5
3.0
3.5
4.0
Power Supply Voltage (V)
4.5
5.0
70
60
50
40
30
20
10
0
20
Figure 91. Noise floor Vcc = 5 V
Standby=OFF
Standby=ON
100 1000
Frequency (Hz)
RL>=16 Ω
Vcc=5V
Av=8
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
10000 20k
50
40
30
70
60
20
10
0
20
Figure 92. Noise floor Vcc = 2 V
Standby=OFF
Standby=ON
100 1000
Frequency (Hz)
RL>=16 Ω
Vcc=2V
Av=8
Cb = 1 µ F
Input Grounded
Bw < 125kHz
Tamb=25°C
10000 20k page 31/47
DS3048 - Rev 5
TS419, TS421
Electrical characteristics curves
Figure 93. PSRR vs. power supply voltage
0
-10
-20
-30
Vripple = 100mVrms
Rfeed = 80k Ω
Input = floating
Cb = 1 µ F
RL >= 16 Ω
Tamb = 25°C
-40
-50
-60
-70
Vcc = 2V
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000
Figure 94. PSRR vs. input capacitor
0
-10
-20
-30
Cin = 1 µ F, 220nF
Vripple = 200mVpp
Av = 8, Vcc = 5V
Input = grounded
Cb = 1 µ F, Rin = 20k
RL >= 16 Ω
Tamb = 25°C
-40
-50
100
Cin = 100nF
1000
Frequency (Hz)
10000
Ω
100000
Figure 95. PSRR vs. bypass capacitor
Cb = Cin = 1 µF
0
-10
-20
-30
Vripple = 200mVpp
Av = 8
Input = Grounded
Cb = Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
Vcc = 2V
-40
-50
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000
Figure 96. PSRR vs. bypass capacitor Cb = 4.7 µF
0
-10
-20
Vripple = 200mVpp
Av = 8
Input = Grounded
Cb = 4.7
µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C -30
-40
Vcc = 2V
-50
-60
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000 page 32/47
Figure 97. PSRR vs. bypass capacitor Cb = 1 μF
0
-10
-20
-30
Vripple = 200mVpp
Av = 8
Input = Grounded
Cb = 10 µ F
Cin = 1 µ F
RL >= 16 Ω
Tamb = 25°C
Vcc = 2V
-40
-50
-60
Vcc = 5V, 3.3V & 2.5V
100 1000
Frequency (Hz)
10000 100000
TS419, TS421
Electrical characteristics curves
DS3048 - Rev 5 page 33/47
5
5.1
5.2
5.3
5.4
TS419, TS421
Application information
Application information
BTL configuration principle
The TS419 and TS421 are monolithic power amplifiers with a BTL output type. BTL (Bridge Tied Load) means that each end of the load is connected to two single-ended output amplifiers. Thus, we have:
Single ended output 1 = Vout1 = Vout (V)
Single ended output 2 = Vout2 = -Vout (V)
And Vout1 - Vout2 = 2Vout (V)
The output power is:
Pout (2Vout
RMS
) 2 / R
L
(W)
For the same power supply voltage, the output power in BTL configuration is four times higher than the output power in single ended configuration.
Gain in typical application schematic
In flat region (no effect of Cin), the output voltage of the first stage is:
(1)
For the second stage : Vout2 = -Vout1 (V)
The differential output voltage is:
(2)
The differential gain named gain (Gv) for more convenient usage is:
Remark : Vout2 is in phase with Vin and Vout1 is 180° phased with Vin. It means that the positive terminal of the loud speaker should be connected to Vout2 and the negative to Vout1.
Low and high frequency response
(3)
In low frequency region, the effect of Cin starts. Cin with Rin forms a high pass filter with a -3 dB cut-off frequency
FCL =
1
2πRinCin Hz
In high frequency region, you can limit the bandwidth by adding a capacitor (Cfeed) in parallel on Rfeed. Its form a low pass filter with a -3 dB cut-off frequency.
FCH =
1
2πRfeedCfeed Hz
Power dissipation and efficiency
Hypothesis:
• Voltage and current in the load are sinusoidal (Vout and Iout)
• Supply voltage is a pure DC source (Vcc)
Regarding the load we have:
VOUT = VPEAKsin ωt t and
IOUT =
VOUT
RL
A
(4)
(5)
DS3048 - Rev 5 page 34/47
TS419, TS421
Decoupling of the circuit
5.5
Note:
5.6
POUT =
VPEAK2
2RL
Then, the average current delivered by the supply voltage is:
W
IccAVG = 2
VPEAK
πRL
A
The power delivered by the supply voltage is Psupply = Vcc Icc
AVG
(W)
Then, the power dissipated by the amplifier is Pdiss = Psupply - Pout (W)
POUT − POUT W and the maximum value is obtained when:
∂Pdiss
∂POUT
= 0 and its value is:
Pdissmax =
2VCC2
π2RL
W
Remark : This maximum value is only depending on power supply voltage and load values.
The efficiency is the ratio between the output power and the power supply
η =
POUT
Psupply
=
πVPEAK
4VCC
The maximum theoretical value is reached when
Vpeak = Vcc, so
π
4 = 78.5 %
Decoupling of the circuit
(6)
(7)
(8)
(9)
(10)
(11)
(12)
Two capacitors are needed to bypass properly the TS419/TS421. A power supply bypass capacitor C
S
and a bias voltage bypass capacitor C
B
.
C
S
has particular influence on the THD+N in the high frequency region (above 7 kHz) and an indirect influence on power supply disturbances.
With 1 μF, you can expect similar THD+N performances to those shown in the datasheet.
In the high frequency region, if C
S
is lower than 1 μF, it increases THD+N and disturbances on the power supply rail are less filtered.
On the other hand, if C
S
is higher than 1 μF, those disturbances on the power supply rail are more filtered.
C
B
has an influence on THD+N at lower frequencies, but its function is critical to the final result of PSRR (with input grounded and in the lower frequency region).
If C
B
is lower than 1 μF, THD+N increases at lower frequencies and PSRR worsens.
If C
B
is higher than 1 μF, the benefit on THD+N at lower frequencies is small, but the benefit to PSRR is substantial.
that C
IN
has a non-negligible effect on PSRR at lower frequencies. The lower the value of C
IN
, the higher the
PSRR.
Wake-up time: T
WU
When standby is released to put the device ON, the bypass capacitor C
B
will not be charged immediatly. As C
B
is directly linked to the bias of the amplifier, the bias will not work properly until the C
B
voltage is correct. The time to reach this voltage is called wake-up time or T
WU
and typically equal to:
T
WU
= 0.15xC
B
(s) with C
B
in μF.
DS3048 - Rev 5 page 35/47
TS419, TS421
Pop performance
Note:
5.7
5.8
Due to process tolerances, the range of the wake-up time is:
0.12xCb < T
WU
< 0.18xC
B
(s) with C
B
in μF
When the standby command is set, the time to put the device in shutdown mode is a few microseconds.
Pop performance
Pop performance is intimately linked with the size of the input capacitor Cin and the bias voltage bypass capacitor
C
B
.
The size of C
IN
is dependent on the lower cut-off frequency and PSRR values requested. The size of C
B
is dependent on THD+N and PSRR values requested at lower frequencies.
Moreover, C
B
ON noise is.
determines the speed with which the amplifier turns ON. The slower the speed is, the softer the turn
The charge time of C
B
is directly proportional to the internal generator resistance 150 kΩ.
Then, the charge time constant for C
B
is
τ
B
= 150 kΩ x C
B
(s)
As C
B
is directly connected to the non-inverting input (pin 2 & 3) and if we want to minimize, in amplitude and duration, the output spike on Vout1 (pin 5), C
IN
must be charged faster than C
B
. The equivalent charge time constant of C
IN
is:
τ
IN
= (Rin + Rfeed) x C
IN
(s)
Thus we have the relation:
τ
IN
< τ
B
(s)
Proper respect of this relation allows to minimize the pop noise.
Remark : Minimizing C
IN
and C
B
benefits both the pop phenomena, and the cost and size of the application.
Application : Differential inputs BTL power amplifier
The schematic on figure 98, shows how to design the TS419/21 to work in a differential input mode.
The gain of the amplifier is:
GVDIFF = 2
R2
R1
In order to reach optimal performances of the differential function, R
1
and R
2
should be matched at 1% max.
(13)
Figure 98. Differential input amplifier configuration
Input capacitance C can be calculated by the following formula using the -3 dB lower frequency required. (F
L
is the lower frequency required).
C ≈
1
2πR1FL
F (14)
Note : This formula is true only if:
FCB =
1
942000 × CB
Hz is ten times lower than F
L
.
The following bill of material is an example of a differential amplifier with a gain of 2 and a -3 dB lower cuttoff frequency of about 80 Hz.
(15)
DS3048 - Rev 5 page 36/47
Designator
R1
R2
C
C
B
= C
S
U1
TS419, TS421
Application : Differential inputs BTL power amplifier
Table 8. Components
Part type
20 k / 1%
20 k / 1%
100 nF
1 µF
TS419/21
DS3048 - Rev 5 page 37/47
6
TS419, TS421
Package information
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
. ECOPACK is an ST trademark.
DS3048 - Rev 5 page 38/47
TS419, TS421
MiniSO-8 mechanical data
6.1
MiniSO-8 mechanical data
Dim.
L
L1 e
K
D
E
E1
A
A1
A2 b c
Min.
0.05
0.78
0.25
0.13
2.90
4.75
2.90
0°
0.40
0.10
0.86
0.33
0.16
3.00
4.90
3.00
0.65
Table 9. MiniSO-8 mechanical data mm.
Typ.
Min.
Max.
1.1
0.15
0.94
0.4Q
0.23
3.10
5.05
3.10
0.002
0.031
0.010
0.005
0.114
0.187
0.114
0.55
6°
0.70
0.10
0°
0.016
Figure 99. MiniSO-8 drawing inch.
Typ.
0.004
0.031
0.13
0.007
0.118
0.193
0.118
0.026
0.022
Max.
0.043
0.005
0.037
0.013
0.009
0.122
0.199
0.122
6°
0.028
0.004
DS3048 - Rev 5 page 39/47
TS419, TS421
DFN8 (3x3) mechanical data
6.2
DFN8 (3x3) mechanical data
Dim.
E2 e
L
D
D2
E
A
A1
A2
A3 b
Min.
0.80
0.18
2.23
1.49
0.30
Table 10. DFN8 (3x3) mechanical data mm.
Typ.
3.00
2.38
3.00
1.64
0.50
0.40
0.90
0.02
0.70
0.20
0.23
Max.
1.00
0.05
0.30
2.48
1.74
0.50
Min.
31.5
7.1
87.8
58.7
11.8
Figure 100. DFN8 (3x3) drawing inch.
Typ.
118.1
93.7
118.1
64.6
19.7
15.7
35.4
0.8
27.6
7.9
9.1
Max.
39.4
2.0
11.8
97.7
68.5
19.7
DS3048 - Rev 5 page 40/47
7
TS419, TS421
Ordering information
Ordering information
Order code
TS419IST
TS421IQT
Temperature range
-40°C to 85°C
Table 11. Order codes
Package miniSO8
DFN8
Packing
Tape and reel
Marking
K19A
K21A
DS3048 - Rev 5 page 41/47
TS419, TS421
Revision history
Date
06-Feb-2013
29-May-2019
Table 12. Document revision history
Revision
4
5
Changes
No history because of migration.
Removed the part numbers TS419IDT, TS421IDT and all its reference throughout the document.
DS3048 - Rev 5 page 42/47
TS419, TS421
Contents
Contents
DS3048 - Rev 5 page 43/47
TS419, TS421
List of tables
List of tables
Table 4. Electrical characteristics V
= 25 °C (unless otherwise specified) . . . . . . . . . . . . . . . . 5
Table 5. Electrical characteristics V
= 25 °C (unless otherwise specified) . . . . . . . . . . . . . . . 6
Table 6. Electrical characteristics V
= 25 °C (unless otherwise specified) . . . . . . . . . . . . . . . 7
Table 7. Electrical characteristics V
= 25 °C (unless otherwise specified) . . . . . . . . . . . . . . . . 8
DS3048 - Rev 5 page 44/47
TS419, TS421
List of figures
List of figures
DS3048 - Rev 5 page 45/47
TS419, TS421
List of figures
DS3048 - Rev 5 page 46/47
TS419, TS421
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© 2019 STMicroelectronics – All rights reserved
DS3048 - Rev 5 page 47/47
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