ILA7056SH
1
INTEGRAL
3 W Mono BTL Audio Output Amplifier
FEATURES
No external components
No switch-on/off clicks
Good overall stability
Low power consumption
Short circuit proof
ESD protected on all pins.
GENERAL DESCRIPTION
The ILA7056SH is a mono output amplifier contained in a
9 pin SIL medium power package (SOT110).
The device is designed for battery-fed portable mono
recorders, radios and television.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Vp
supply voltage
3
11
18
V
Po
output power
Vp=11 V, THD=10
!
,
RL=16
"
2.5
3
W
Gv
internal voltage gain
39
40,0
42
dB
Ip
total quiescent current
Vp=11 V; RL=
#
5
7
mA
THD
total harmonic distortion
Po=0,5 W
0,25
1
%
ILA7056SH
2
INTEGRAL
PIN
DESCRIPTION
1
n.c.
2
VP
3
input(+)
4
signal ground
5
n.c.
6
output(+)
7
power ground
8
output(-)
9
n.c.
FUNCTIONAL DESCRIPTION
The ILA7056SH is a mono output amplifier, designed for battery-fed portable radios and mains-fed equipment such as
television. For space reasons there is a trend to decrease the number of external components. For portable applications there
is also a trend to decrease the number of battery cells, but still a reasonable output power is required.
The ILA7056SH fulfills both of these requirements. It needs no peripheral components, because it makes use of the Bridge-
Tied-Load (BTL) principle. Consequently it has, at the same supply voltage, a higher output power compared to a conventional
Single Ended output stage. It delivers an output power of 1 W into a loudspeaker load of 8 W with 6 V supply or 3 W into 16 W
loudspeaker at 11 V without need of an external heatsink. The gain is internally fixed at 40 dB. Special attention is given to
switch-on/off click suppression, and it has a good overall stability. The load can be short circuited at all input conditions.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
Vp
supply voltage
-
18
V
iorm
Peak output current repetitive
-
1
A
iosm
Peak output current non-repetitive
-
1.5
A
Tstg
storage temperature range
-55
150
C
Tj
junction temperature
-
150
C
Plot
total power dissipation
T^se < 60 C
-
9
W
Tsc
short circuiting time
see note 1
-
1
hr
Note
1. The load can be short-circuited at all input conditions.
SYMBOL
PARAMETER
NOM.
UNIT
hibk
from junction to case
10
K/W
Rtll.a
from junction to ambient in free air
55
K/W
POWER DISSIPATION
Assume: VP = 11 V; RL = 16 W.
The maximum sine-wave dissipation is 1.52 W.
The Rth j-a of the package is 55 K/W.
Tamb max = 150 - 55 1.52 = 66.4 C.
ILA7056SH
3
INTEGRAL
CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Vp
operating supply voltage
3
11
18
V
IQRM
repetitive peak output current
-
-
0.6
A
IP
total quiescent current
-
5
7
mA
PO
output power
THD= 10%
2.5
3
-
W
THD
total harmonic distortion
Po = 0.5 W
-
0.25
1
GV
voltage gain
39
40.5
42
dB
Vno
noise output voltage
note 2
-
180
300
uV
Vno
noise output voltage
note 3
-
60
-
[JV
frequency response
-
20 to
20.000
-
Hz
RR
ripple rejection
note 4
36
50
-
dB
AV
DC-output offset voltage
note 5
-
-
200
mV
IZJ
input impedance
-
100
-
kii
1,
input bias current
-
100
300
nA
Notes to the characteristics
1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being equal to
the DC output offset voltage divided by RL .
2. The noise output voltage (RMS value) is measured with RS = 5 kW unweighted (20 Hz to 20 kHz).
3. The noise output voltage (RMS value) at f = 500 kHz is measured with RS = 0 W and bandwidth = 5 kHz. With a practical
load (RL = 16 W, LL = 200 mH) the noise output current is only 50 nA.
4. The ripple rejection is measured with RS = 0 W and f = 100 Hz to 10 kHz. The ripple voltage (200 mV) is applied to the
positive supply rail.
5. RS = 5 kW.