LV4910T

Ordering number : ENA0893
LV4910T
Bi-CMOS LSI
Class-D Audio Power Amplifier
BTL 2W x 2ch
http://onsemi.com
Overview
LV4910T is a stereo digital amplifier for portable equipment, for example notebook-PC, portable DVD and portable
mini-speakers. It is characterized by the use of an original feedback technology to improve sound quality though it is
Class-D amplifier, and does not need the LC filter in the output stage.
Features
 D-class high-efficiency amplifier
 Low pop sound at SW changeover
 Differential input type
Functions
 2W stereo digital power amplifier
 Standby switch
 Mute switch
 Various protective circuits (over-current protective, thermal protective, and under-voltage circuits) incorporated
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter
Maximum supply voltage
Allowable power dissipation
Symbol
Conditions
VCC max
Pd max
as mounted on the substrate
Ratings
Unit
6
V
1.05
W
Operating temperature
Topr
-20 to +75
C
Storage temperature
Tstg
-40 to +150
C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
90507 MS PC 20070709-S00007 No.A0893-1/7
LV4910T
Operating Conditions at Ta = 25C
Parameter
Symbol
Recommended supply voltage
VCC
Operation supply voltage range
VCC opg
Recommended load resistance
RL
Conditions
Ratings
Unit
5
V
2.5 to 5.5
V
4

Speaker
Electrical Characteristics Ta  25C, VCC = 5V, f = 1kHz, RL = 4
Ratings
Parameter
Symbol
Conditions
Unit
min
Standby current
Ist
Current at no signal
ICCO mute
Voltage gain
max
Current at ST ON
ICCO1
Current at Mute
typ
VG
1
A
At LC filter-less
12
20
mA
At Mute of speaker
10
16
mA
23
25
dB
0
1
dB
VO = 0dBm
21
-1
VG
VO = 0dBm
Output power
PO
THD = 10%
Total harmonic distortion
THD
PO = 0.5W, DIN AUDIO
0.4
0.7
%
Output noise voltage
VNO
Channel balance
2
W
Rg = 0, DIN AUDIO
100
200
V
Crosstalk
CT
VO = 0dBm, TUN 1kHz
-60
-40
dB
Ripple rejection ratio
RR
fr = 100Hz, Vr = -10dBm, TUN 100Hz
-40
-30
dB
dB
Common mode rejection ratio
CMRR
VO = 0dBm, DIN AUDIO
-60
-40
Mute attenuation value
VOFF
VO = 0dBm, DIN AUDIO
-80
-70
Oscillation frequency
FPWM
Standby ON voltage sensitivity
dB
300
VPWROFF
Standby ON start voltage
Standby OFF voltage sensitivity
VPWRON
Standby OFF start voltage
Mute ON voltage sensitivity
VMUTEON
Mute ON start voltage
Mute OFF voltage sensitivity
VMUTEOFF
Mute OFF start voltage
kHz
1
V
3
V
0.5
V
2
V
* Electrical characteristics vary depending on the substrate layout and selection of external parts.
For measurement of the above characteristics, the coil : 22H (Toko Kabushiki Kaisha made D63CB) is used.
Package Dimensions
unit : mm (typ)
3259
Pd max -- Ta
9.75
30
0.5
7.6
5.6
16
15
1
0.15
(1.0)
1.2max
0.22
1.05
1.0
0.63
0.5
0
– 20
0.08
0.65
(0.33)
Allowable power dissipation, Pd max – W
1.5
0
20
40
60
80
100
Ambient temperature, Ta – °C
SANYO : TSSOP30(275mil)
No.A0893-2/7
LV4910T
Block Diagram
22μH
GND2
OUT+2 3
0.33μF
NC 4
6
0-5V
RECEIVER
1μF
PRE GND
VREF
MUTE 9
RF CAP
28 OUT 1
RL
22μH
+
26
220μF
VCC1
1μF
Pre VCC
24
23
22
21 STBY
10
0-5V
BIAS
MUTE
4.7μF
1μF
0.33μF
25
THERMAL
BIAS
MUTE
7
MUTE CAP 8
CONTROL DE
LAY
1μF
5
RECEIVER
VCC2
+ 22μH
30 OUT 1
0.33μF
GND1
29
27 NC
CONTROL DE
LAY
220μF
+
OUTPUTSTAGE
22μH
2
OUTPUTSTAGE
RL
OUTPUTSTAGE
0.33μF
OUTPUTSTAGE
1μF
OUT-2 1
11
20
PRE GND
12
1μF IN_CH2+
1μF IN_CH2PRE GND
R.F.
19
13
18
14
17
15
16
IN_CH1+ 1μF
IN_CH1- 1μF
VREF OUT
22μF
PRE GND
No.A0893-3/7
LV4910T
Pin Descriptions
Pin No.
Pin name
Pin voltage (V)
1
OUT-2
OUT+2
2.58
3
30
OUT-1
OUT+1
2
GND2
4
NC
5
VCC2
6
NC
7
NC
8
MUTE CAP
28
Pin description
Equivalent circuit
 Power outputs
0
 Non-connection
5
 Non-connection
 Non-connection
4.9
 Connection for the mute switch On/Off impulse noise
reduction capacitor
20kΩ
300kΩ
9
 Mute On/Off switch
MUTE
 2 to 5.5V : Mute Off
 0 to 0.7V : Mute On
100kΩ
20kΩ
300kΩ
10
RF CAP
2.6
 Ripple filter reference
100kΩ
300Ω 45kΩ
100kΩ
11
NC
12
NC
13
IN_ch2+
IN_ch2-
14
17
18
IN_ch1IN_ch1+
 Non-connection
 Non-connection
2.4
 Signal input
300Ω
30kΩ
Continued on next page.
No.A0893-4/7
LV4910T
Continued from preceding page.
Pin No.
Pin name
Pin voltage (V)
15
PRE GND
0
16
VREF OUT
2.55
Pin description
Equivalent circuit
 VREF amplifier reference
1kΩ
NC
 Non-connection
20
NC
 Non-connection
21
STBY
19
 STBY On/Off switch
 0 to 1V : Power Off
 3 to 5.5V : Power On
1kΩ
20kΩ
300kΩ
10kΩ
22
NC
 Non-connection
23
NC
 Non-connection
 Non-connection
24
NC
25
PRE VCC
5
26
VCC1
5
27
NC
29
GND1
 Non-connection
0
No.A0893-5/7
LV4910T
Ist, ICCO -- VCC
0.7
VG -- f
25.0
ch2
ch1
I CCO
20
(μ
Ist
0.5
A)
0.4
0.3
15
0.2
10
0.1
20.0
Voltage gain, VG – dB
)
(mA
Standby current, Ist – μA
Quiescent current, ICCO – mA
0.6
25
15.0
10.0
5.0
5
VCC = 5V
RL = 4Ω
VO = 0dBm
0
–0.1
0
1
0
2
3
4
5
0
10
6
2 3
5 7 100
2 3
Supply voltage, VCC – V
Output power, PO – W
2.5
PO -- VCC
)
2.0
%
D
=
10
H
1.5
PO
(T
1.0
0.5
0
2
2.5
3
3.5
4
4.5
5
5.5
1.2
Ripple rejection ratio, SVRR – dB
Output power, PO – W
im
ss
nd
c
a
h1
c
0.010
7
5
3
2
60
50
0.8
40
2
3
5
7
2
0.1
3
5
7
.6
Pd
0.4
P
20
VCC = 3.6V, 5V
RL = 4Ω
f = 1kHz
2
3
5
7
2
1
3
5
7
10
0
10
–5
SVRR -- f
VCC = 5V
RL = 4Ω
VR = -10dBm, non-filter
– 10
– 15
– 20
– 25
– 30
– 35
ch1 and ch2 is similar
– 40
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7 100k
100.00
7
5
3
2
ch2
ch1
THD+N -- PO
RL = 4Ω
f = 1kHz
DIN AUDIO
10.00
7
5
3
2
1.00
7
5
ch1
ch2
THD+N -- f
VCC = 5V
RL = 4Ω
PO = 0.5W, DIN AUDIO
THD+N – %
THD+N – %
30
V)
5
d(
Frequency, f – Hz
3
2
3
2
3
2
0.01
10
(3
0.2
10
1
1.00
7
5
0.10
7
5
V)
0.6
Input voltage, VIN – Vrms
3
2
70
6V)
– 45
0.001
0.01
10.00
7
5
80
1.0
10
r
ila
0.100
7
5
3
2
5 7100k
Output power, PO – W
RL = 4Ω
VCC = 5V
f = 1kHz
i
h2
2 3
η (3.
0
0.1
6
PO -- VIN
1.000
7
5
3
2
5 7 10k
V)
η (5
Supply voltage, VCC – V
10.000
7
5
3
2
2 3
Pd, η -- PO
1.4
RL = 4Ω
f = 1kHz
THD = 10%
Allowable power dissipation, Pd – W
3.0
5 7 1k
Frequency, f – Hz
η – %
30
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
Frequency, f – Hz
2 3
5 7100k
0.10
0.1
2
3
5
7
1
2
3
5
7
10
Output power, PO – W
No.A0893-6/7
LV4910T
– 45
Crosstalk, CT – dB
– 50
CT -- f
RL = 4Ω
Rg = 0Ω
DIN AUDIO
140
– 55
2→1
– 60
1→2
– 65
– 70
– 75
130
120
110
100
ch1
90
ch2
80
70
60
– 80
10
VNO -- VCC
150
VCC = 5V
RL = 4Ω
Rg = 0Ω
VO = 0dBm, non-filter
Output noise voltage, VNO – μV
– 40
50
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
Frequency, f – Hz
2 3
5 7100k
2
2.5
3
3.5
4
4.5
5
5.5
6
Supply voltage, VCC – V
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PS No.A0893-7/7