TS2012
Filter-free stereo 2x2.8 W class D audio power amplifier
Datasheet
-
production data
TS2012 - QFN20 (4x4 mm)
Features
•
Operating range from V
CC
= 2.5 V to 5.5 V
•
Standby mode active low
•
Output power per channel: 1.35 W @ 5 V or
0.68 W @ 3.6 V into 8
Ω
with 1 % THD+N max
Pin connections (top view)
20
Lin+
•
Output power per channel: 2.2 W @ 5 V into
4
Ω
with 1 % THD+N max
•
Four gains can be selected: 6, 12, 18, 24 dB
•
Low current consumption
•
PSRR: 70 dB typ @ 217 Hz with 6 dB gain
19
Lin-
18
AGND
17
Rin-
16
Rin+
1
2
3
4
5
G1
Lout+
PVCC
PGND
Lout-
STBYL
STBYR
G0
Rout+
PVCC
PGND
Rout-
AVCC
15
14
13
12
11
•
Fast startup phase: 1 ms
•
Thermal shutdown protection
•
QFN20 4x4 mm lead-free package
Applications
•
Cellular phone
•
PDA
•
Flat panel TV
6
NC
7
8
9
10
NC
Block diagram
9
3
AV
CC
PV
CC
PV
CC
13
Description
The TS2012 is a fully differential, class D, power
amplifier stereo. It is able to drive up to 1.35 W
into an 8
Ω
load at 5 V per channel. It achieves
outstanding efficiency compared to typical class
AB audio amps.
The device has four different gain settings utilizing
two discrete pins: G0 and G1.
H
ROUT+
ROUT-
14
11
Bridge
20
19
15
1
LIN +
LIN -
G0
G1
Gain
Select
PWM
H
Bridge
LOUT+
LOUT-
2
5
Oscillator
300k
300k
16
17
7
8
RIN +
RIN -
STBY L
STBY R
300k
300k
Gain
Select
PWM
Standby
Control
Pop and click reduction circuitry provides low
on/off switch noise while allowing the device to
start within 1 ms.
Two standby pins (active low) allow each channel
to be switched off independently.
The TS2012 is available in a QFN20 4x4 mm
package.
AGND
PGND
4
18
July 2013
This is information on a product in full production.
12
PGND
DocID14236 Rev 2
1/29
www.st.com
Contents
TS2012
Contents
1
2
3
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
3.2
Electrical characteristic tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . 21
Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Wakeup time (t
wu
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1
QFN20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6
7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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DocID14236 Rev 2
TS2012
Absolute maximum ratings and operating conditions
1
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol
V
CC
V
i
T
oper
T
stg
T
j
R
thja
P
d
ESD
Supply voltage
(1)
Input voltage
(2)
Operating free air temperature range
Storage temperature
Maximum junction temperature
Thermal resistance junction to ambient
(3)
Power dissipation
HBM: human body model
(5)
MM: machine model
(6)
Parameter
Value
6
GND to V
CC
-40 to + 85
-65 to +150
150
100
Internally limited
(4)
2
200
200
GND to V
CC
260
kV
V
mA
V
°C
°C/W
°C
Unit
V
Latch-up Latch-up immunity
V
STBY
Standby pin voltage maximum voltage
Lead temperature (soldering, 10 s)
1. All voltage values are measured with respect to the ground pin.
2. The magnitude of the input signal must never exceed V
CC
+ 0.3 V / GND - 0.3 V.
3. The device is protected in case of over temperature by a thermal shutdown active @ 150 °C.
4. Exceeding the power derating curves over a long period causes abnormal operation.
5. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
6. Machine model: a 200 pF cap is charged to the specified voltage, then discharged directly between two
pins of the device with no external series resistor (internal resistor < 5
Ω),
done for all couples of pin
combinations with other pins floating.
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29
Absolute maximum ratings and operating conditions
Table 2. Operating conditions
Symbol
V
CC
V
I
V
ic
V
STBY
R
L
V
IH
V
IL
R
thja
Supply voltage
Input voltage range
Input common mode voltage
(1)
Standby voltage input
(2)
Device ON
Device in STANDBY
(3)
Load resistor
GO, G1 - high level input voltage
(4)
GO, G1 - low level input voltage
Thermal resistance junction to ambient
(5)
Parameter
Value
2.5 to 5.5
GND to V
CC
GND+0.5V to V
CC
-0.9V
1.4
≤
V
STBY
≤
V
CC
GND
≤
V
STBY
≤
0.4
≥
4
1.4
≤
V
IH
≤
V
CC
GND
≤
V
IL
≤
0.4
40
TS2012
Unit
V
Ω
V
°C/W
1. I V
oo
I
≤
40 mV max with all differential gains except 24 dB. For 24 dB gain, input decoupling caps are
mandatory.
2. Without any signal on V
STBY
, the device is in standby (internal 300 kΩ ± 20 % pull-down resistor).
3. Minimum current consumption is obtained when V
STBY
= GND.
4. Between G0, G1pins and GND, there is an internal 300kΩ (±20 %) pull-down resistor. When pins are
floating, the gain is 6 dB. In full standby (left and right channels OFF), these resistors are disconnected
(HiZ input).
5. With 4-layer PCB.
4/29
DocID14236 Rev 2
TS2012
Typical application
2
Typical application
Figure 1. Typical application schematics
Cs
VCC
100nF
Input capacitors
are optional
CsL
1
μ
F
VCC VCC
CsR
1
μ
F
Gain Select
Control
TS2012
AV
CC
PV
CC
Cin
Differential
Left Input
Left IN-
LIN +
Cin
LIN -
G0
G1
Right IN+
Cin
Differential
Right Input
Right IN-
Cin
RIN +
RIN -
Gain
Select
Gain
Select
PV
CC
Left IN+
H
PWM
Bridge
LOUT+
LOUT-
Left speaker
Oscillator
ROUT+
ROUT-
Right speaker
PWM
H
Bridge
STBY L
STBY R
Standby
AGND
PGND
CsL
1
μ
F
Control
PGND
CsR
1
μ
F
Standby Control
Cs
VCC
100nF
Input capacitors
are optional
VCC VCC
Gain Select
Control
TS2012
AV
CC
PV
CC
Cin
Differential
Left Input
Left IN-
LIN +
Cin
LIN -
G0
G1
Right IN+
Cin
Differential
Right Input
Right IN-
Cin
RIN +
RIN -
Gain
Select
Gain
Select
PV
CC
Left IN+
H
PWM
Bridge
LOUT+
LOUT-
LC Output Filter
Load
Oscillator
ROUT+
ROUT-
LC Output Filter
Load
PWM
H
Bridge
STBY L
STBY R
Standby
AGND
PGND
Control
PGND
Standby Control
4
Ω
LC Output Filter
15
μ
H
2
μ
F
2
μ
F
8
Ω
LC Output Filter
30
μ
H
1
μ
F
1
μ
F
15
μ
H
30
μ
H
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29
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