TS4962
3W Filter-free Class D Audio Power Amplifier
PRELIMINARY DATA
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Operating from Vcc=2.4V to 5.5V
Standby mode active low
Output power: 3W into 4Ω and 1.75W into 8Ω
with 10% THD+N max and 5V power supply.
Output power: 2.3W @5V or 0.75W @ 3.0V
into 4Ω with 1% THD+N max.
Output power: 1.4W @5V or 0.45W @ 3.0V
into 8Ω with 1% THD+N max.
Adjustable gain via external resistors
Low current consumption 2mA @ 3V
Efficiency: 88% typ.
Signal to noise ratio: 85dB typ.
PSRR: 63dB typ. @217Hz with 6dB gain
PWM base frequency: 250kHz
Low pop & click noise
Thermal shutdown protection
Available in flip-chip 9 x 300um in lead free*
Pin Connections
(top view)
TS4962EIJT
IN
+
1/A1
V
DD
4/B1
IN
-
7/C1
GND
2/A2
V
DD
5/B2
STBY
8/C2
OUT
-
3/A3
GND
6/B3
OUT
+
9/C3
IN+: positive differential input
IN-: negative differential input
VDD: analog power supply
GND: power supply ground
STBY: standby pin (active low)
OUT+: positive differential output
OUT-: negative differential output
Description
The TS4962 is a differential class-D B.T.L. power
amplifier. Able to drive up to 2.3W into a 4Ω load
and 1.4W into a 8Ω load at 5V. It achieves
outstanding efficiency (88%typ.) compared to
classical AB-class audio amps.
Gain of the device can be controlled via two
external gain setting resistors. POP & CLICK
reduction circuitry provides low on/off switch noise
while allowing the device to start within 5ms.A
standby function (active low) allows to lower the
current consumption to 10nA typ.
Block Diagram
B1
Vcc
C2
Stdby
300k
Internal
Bias
150k
Out+
C3
Output
PWM
H
Bridge
150k
Oscillator
A3
Out-
B2
C1
In-
In+
A1
-
+
Applications
■
■
■
Cellular Phone
PDA
Notebook PC
GND
B3
A2
Order Codes
Part Number
TS4962IJT
TS4962EIJT
TS4962EKIJT
Temperature Range
-40, +85°C
-40, +85°C
-40, +85°C
Package
Flip-Chip
Lead -Free Flip-Chip
Lead Free + Back
Coating
Packaging
Marking
A62
A62
A62
Tape & Reel
February 2005
Revision 2
1/22
This product preview information shows the electrical and mechanical performances of a finalized product. However, details could still be modified.
TS4962
Absolute Maximum Ratings
1 Absolute Maximum Ratings
Table 1. Key parameters and their absolute maximum ratings
Symbol
V
CC
V
i
T
oper
T
stg
T
j
R
thja
Pd
Supply voltage
1
Input Voltage
2
Operating Free Air Temperature Range
Storage Temperature
Maximum Junction Temperature
Thermal Resistance Junction to Ambient
3
Power Dissipation
Parameter
Value
6
G
ND
to V
CC
-40 to + 85
-65 to +150
150
200
Internally Limited
4
2
200
200
G
ND
to V
CC
260
Unit
V
V
°C
°C
°C
°C/W
kV
V
mA
V
°C
ESD
Human Body Model
ESD
Machine Model
Latch-up Latch-up Immunity
V
STB
Standby pin voltage maximum voltage
5
Lead Temperature (soldering, 10sec)
1) All voltages values are measured with respect to the ground pin.
2) The magnitude of input signal must never exceed V
CC
+ 0.3V / G
ND
- 0.3V
3) Device is protected in case of over temperature by a thermal shutdown active @ 150°C.
4) Exceeding the power derating curves during a long period, involves abnormal operating condition.
5) The magnitude of standby signal must never exceed V
CC
+ 0.3V / G
ND
- 0.3V
Table 2. Operating Conditions
Symbol
V
CC
V
IC
V
STB
RL
R
thja
Supply Voltage
1
Common Mode Input Voltage Range
2
Standby Voltage Input :
3
Device ON
Device OFF
Load Resistor
Thermal Resistance Junction to Ambient
5
Parameter
Value
2.4 to 5.5
0.5 to V
CC
-0.8
1.4
≤
V
STB
≤
V
CC
G
ND
≤
V
STB
≤
0.4
4
Unit
V
V
V
≥
4
90
Ω
°C/W
1) For V
CC
from 2.4V to 2.5V, the operating temperature range is reduced to 0°C
≤
Tamb
≤
70°C
2) For V
CC
from 2.4V to 2.5V, the common mode input range must be set at V
CC
/2.
3) Without any signal on V
STB
, the device will be in standby
4) Minimum current consumption shall be obtained when V
STB
= GND.
5) With heat sink surface = 125mm
2
.
2/22
Application Component Information
TS4962
2 Application Component Information
Component
Cs
Rin
Input
Capacitor
Functional Description
Bypass supply capacitor. To install as close as possible of the TS4962 to minimize high frequency rip-
ple. A 100nF ceramic capacitor should be add to enhance the power supply filtering in high frequency.
Input resistor to program the TS4962 differential gain (Gain = 300k
Ω
/Rin with Rin in k
Ω
)
Thanks to common mode feedback, these input capacitors are optional. However, we can add then to
form with Rin a 1st order high pass filter with -3dB cut-off frequency = 1/(2*
π
*Rin*Cin)
Figure 1.
Typical application
Vcc
Vcc
B1
Vcc
C2
Stdby
300k
Internal
Bias
150k
B2
In+
Cs
1u
Out+
C3
Output
PWM
H
Bridge
GND
GND
GND
+
Rin
C1
Differential
Input
In-
-
A1
Rin
In-
In+
+
150k
Oscillator
-
SPEAKER
A3
Out-
Input
capacitors
are optional
GND
TS4962
GND
A2
B3
GND
Vcc
Vcc
B1
Vcc
C2
Stdby
300k
Internal
Bias
150k
B2
In+
Cs
1u
4 Ohms LC Output Filter
Out+
C3
Output
PWM
H
Bridge
GND
GND
GND
15µH
+
Rin
C1
In-
In+
Differential
Input
In-
-
A1
Rin
Input
capacitors
are optional
-
+
150k
Oscillator
1µF
A3
15µH
Load
Out-
GND
GND
TS4962
A2
B3
GND
30µH
0.5µF
30µH
8 Ohms LC Output Filter
3/22
TS4962
Electrical Characteristics
3 Electrical Characteristics
Table 3. V
CC
= +5V, GND = 0V, V
ICM
= 2.5V, T
amb
= 25°C (unless otherwise specified)
Symbol
I
CC
I
STANDBY
Voo
Supply Current
No input signal, no load
Standby Current
1
No input signal, V
STBY
= GND
Output Offset Voltage
No input signal, R
L
= 8
Ω
Output Power, G=6dB
THD = 1% Max, f = 1kHz, R
L
= 4
Ω
THD = 10% Max, f = 1kHz, R
L
= 4
Ω
THD = 1% Max, f = 1kHz, R
L
= 8
Ω
THD = 10% Max, f = 1kHz, R
L
= 8
Ω
Total Harmonic Distortion + Noise
Po = 900 mW
RMS
, G = 6dB, 20Hz < f < 20kHz,
R
L
= 8
Ω
+ 15µH, BW < 30kHz
Po = 1W
RMS
, G = 6dB, f = 1kHz,
R
L
= 8
Ω
+ 15µH, BW < 30kHz
Efficiency
Po = 2 W
RMS
, R
L
= 4
Ω + ≥
15µH
Po =1.2 W
RMS
, R
L
= 8
Ω+ ≥
15µH
Power Supply Rejection Ratio with inputs grounded
2
f = 217Hz, R
L
= 8
Ω
, G=6dB
,
Vripple = 200mV
pp
Common Mode Rejection Ratio,
f = 217Hz, R
L
= 8
Ω,
G = 6dB,
∆
Vic = 200mV
pp
Gain value (R
in
in k
Ω
)
Internal Resistance From Standby to GND
Pulse Width Modulator Base Frequency
Signal to Noise ratio (A Weighting), Po = 1.2W, R
L
= 8
Ω
Wake-up time
Standby time
Output Voltage Noise f = 20Hz to 20kHz, G = 6dB
Unweighted R
L
= 4
Ω
A weighted R
L
= 4
Ω
Unweighted R
L
= 8
Ω
A weighted R
L
= 8
Ω
Unweighted R
L
= 4
Ω
+ 15µH
A weighted R
L
= 4
Ω
+ 15µH
Unweighted R
L
= 4
Ω
+ 30µH
A weighted R
L
= 4
Ω
+ 30µH
Unweighted R
L
= 8
Ω
+ 30µH
A weighted R
L
= 8
Ω
+ 30µH
Unweighted R
L
= 4
Ω
+ Filter
A weighted R
L
= 4
Ω
+ Filter
Unweighted R
L
= 4
Ω
+ Filter
A weighted R
L
= 4
Ω
+ Filter
Parameter
Min.
Typ.
2.3
10
3
Max.
3.3
1000
25
Unit
mA
nA
mV
Po
2.3
3
1.4
1.75
W
THD + N
1
0.4
78
88
63
57
273 k
Ω
300k
Ω
327k
Ω
----------------- ----------------- -----------------
-
-
-
R
R
R
in
in
in
273
180
300
250
85
5
5
85
60
86
62
83
60
88
64
78
57
87
65
82
59
90
66
327
320
10
10
%
Efficiency
%
PSRR
CMRR
Gain
R
STDBY
F
PWM
SNR
T
WU
T
STB
dB
dB
V/V
k
Ω
kHz
dB
ms
ms
V
N
µ
V
RMS
1)
2)
Standby mode is active when Vstdby is tied to GND.
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to V
cc
@ f = 217Hz.
4/22
Electrical Characteristics
Table 4. V
CC
= +4.2V, GND = 0V, V
ICM
= 2.1V, T
amb
= 25°C (unless otherwise specified)
1
Symbol
I
CC
I
STANDBY
Voo
Supply Current
No input signal, no load
Standby Current
2
No input signal, V
STBY
= GND
Output Offset Voltage
No input signal, R
L
= 8
Ω
Output Power, G=6dB
THD = 1% Max, f = 1kHz, R
L
= 4
Ω
THD = 10% Max, f = 1kHz, R
L
= 4
Ω
THD = 1% Max, f = 1kHz, R
L
= 8
Ω
THD = 10% Max, f = 1kHz, R
L
= 8
Ω
Total Harmonic Distortion + Noise
Po = 600 mW
RMS
, G = 6dB, 20Hz < f < 20kHz,
R
L
= 8
Ω
+ 15µH, BW < 30kHz
Po = 700mW
RMS
, G = 6dB, f = 1kHz,
R
L
= 8
Ω
+ 15µH, BW < 30kHz
Efficiency
Po = 1.45 W
RMS
, R
L
= 4
Ω + ≥
15µH
Po = 0.9 W
RMS
, R
L
= 8
Ω+ ≥
15µH
Power Supply Rejection Ratio with inputs grounded
3
f = 217Hz, R
L
= 8
Ω
, G=6dB
,
Vripple = 200mV
pp
Common Mode Rejection Ratio
f = 217Hz, R
L
= 8
Ω,
G = 6dB,
∆
Vic = 200mV
pp
Gain value (R
in
in k
Ω
)
Internal Resistance From Standby to GND
Pulse Width Modulator Base Frequency
Signal to Noise ratio (A Weighting), Po = 0.9W, R
L
= 8
Ω
Wake-up time
Standby time
Output Voltage Noise f = 20Hz to 20kHz, G = 6dB
Unweighted R
L
= 4
Ω
A weighted R
L
= 4
Ω
Unweighted R
L
= 8
Ω
A weighted R
L
= 8
Ω
Unweighted R
L
= 4
Ω
+ 15µH
A weighted R
L
= 4
Ω
+ 15µH
Unweighted R
L
= 4
Ω
+ 30µH
A weighted R
L
= 4
Ω
+ 30µH
Unweighted R
L
= 8
Ω
+ 30µH
A weighted R
L
= 8
Ω
+ 30µH
Unweighted R
L
= 4
Ω
+ Filter
A weighted R
L
= 4
Ω
+ Filter
Unweighted R
L
= 4
Ω
+ Filter
A weighted R
L
= 4
Ω
+ Filter
Parameter
Min.
Typ.
2.1
10
3
Max.
3
1000
25
TS4962
Unit
mA
nA
mV
Po
1.6
2
0.95
1.2
W
THD + N
1
0.35
78
88
63
57
300 k
Ω
273k
Ω
----------------- 327k
Ω
- -----------------
-
-----------------
-
R
R
R
in
in
in
273
180
300
250
85
5
5
85
60
86
62
83
60
88
64
78
57
87
65
82
59
90
66
10
10
327
320
%
Efficiency
%
PSRR
CMRR
Gain
R
STDBY
F
PWM
SNR
T
WU
T
STB
dB
dB
V/V
k
Ω
kHz
dB
ms
ms
V
N
µ
V
RMS
1)
2)
3)
All electrical values are guaranted with correlation measurements at 2.5V and 5V.
Standby mode is actived when Vstdby is tied to GND.
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz.
5/22
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
